mirror of
https://sourceware.org/git/glibc.git
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114d07fd9a
DT_RUNPATH is only used to find the immediate dependencies of the executable or shared object containing the DT_RUNPATH entry: 1. Define link-test-modules-rpath-link if $(build-hardcoded-path-in-tests) is yes. 2. Use $(link-test-modules-rpath-link) in build-module-helper so that test modules can dlopen modules with DT_RUNPATH. 3. Add a test to show why link-test-modules-rpath-link is needed. This partially fixes BZ #28455.
1409 lines
51 KiB
Plaintext
1409 lines
51 KiB
Plaintext
# Copyright (C) 1991-2022 Free Software Foundation, Inc.
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# Copyright The GNU Toolchain Authors.
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# This file is part of the GNU C Library.
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# The GNU C Library is free software; you can redistribute it and/or
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# modify it under the terms of the GNU Lesser General Public
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# License as published by the Free Software Foundation; either
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# version 2.1 of the License, or (at your option) any later version.
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# The GNU C Library is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# Lesser General Public License for more details.
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# You should have received a copy of the GNU Lesser General Public
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# License along with the GNU C Library; if not, see
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# <https://www.gnu.org/licenses/>.
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#
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# Makefile configuration options for the GNU C library.
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#
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ifneq (,)
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This makefile requires GNU Make.
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endif
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all: # Make this the default goal
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ifneq "$(origin +included-Makeconfig)" "file"
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+included-Makeconfig := yes
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ifdef subdir
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.. := ../
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endif
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# $(common-objdir) is the place to put objects and
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# such that are not specific to a single subdir.
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ifdef objdir
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objpfx := $(patsubst %//,%/,$(objdir)/$(subdir)/)
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common-objpfx = $(objdir)/
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common-objdir = $(objdir)
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else
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$(error objdir must be defined by the build-directory Makefile)
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endif
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# Root of the sysdeps tree.
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sysdep_dir := $(..)sysdeps
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export sysdep_dir := $(sysdep_dir)
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# Get the values defined by options to `configure'.
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include $(common-objpfx)config.make
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# What flags to give to sources which call user provided callbacks
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uses-callbacks = -fexceptions
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# What flags to give to tests which test stack alignment
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stack-align-test-flags =
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# Complete path to sysdep dirs.
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# `configure' writes a definition of `config-sysdirs' in `config.make'.
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sysdirs := $(foreach D,$(config-sysdirs),$(firstword $(filter /%,$D) $(..)$D))
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+sysdep_dirs = $(sysdirs)
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ifdef objdir
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+sysdep_dirs := $(objdir) $(+sysdep_dirs)
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endif
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# Run config.status to update config.make and config.h. We don't show the
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# dependence of config.h to Make, because it is only touched when it
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# changes and so config.status would be run every time; the dependence of
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# config.make should suffice to force regeneration and re-exec, and the new
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# image will notice if config.h changed.
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$(common-objpfx)config.make: $(common-objpfx)config.status \
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$(..)config.make.in $(..)config.h.in
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cd $(<D); $(SHELL) $(<F)
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# Find all the sysdeps configure fragments, to make sure we re-run
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# configure when any of them changes.
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$(common-objpfx)config.status: $(..)version.h $(..)configure \
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$(foreach dir,$(sysdirs),\
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$(wildcard $(dir)/Implies) \
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$(patsubst %.ac,%,\
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$(firstword $(wildcard \
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$(addprefix $(dir)/,configure configure.ac))))) \
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$(patsubst %.ac,%,\
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$(wildcard $(..)sysdeps/*/preconfigure $(..)sysdeps/*/preconfigure.ac))
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@cd $(@D); if test -f $(@F); then exec $(SHELL) $(@F) --recheck; else \
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echo The GNU C library has not been configured. >&2; \
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echo Run \`configure\' to configure it before building. >&2; \
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echo Try \`configure --help\' for more details. >&2; \
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exit 1; fi
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# We don't want CPPFLAGS to be exported to the command running configure.
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unexport CPPFLAGS
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# Get the user's configuration parameters.
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ifneq ($(wildcard $(..)configparms),)
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include $(..)configparms
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endif
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ifneq ($(objpfx),)
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ifneq ($(wildcard $(common-objpfx)configparms),)
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include $(common-objpfx)configparms
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endif
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endif
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####
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#### These are the configuration variables. You can define values for
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#### the variables below in the file `configparms'.
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#### Do NOT edit this file.
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####
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# Common prefix for machine-independent installation directories.
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ifeq ($(origin prefix),undefined) # ifndef would override explicit empty value.
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prefix = /usr/local
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endif
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# Decide whether we shall build the programs or not. We always do this
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# unless the user tells us (in configparms) or we are building for a
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# standalone target.
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ifndef build-programs
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ifneq ($(config-os),none)
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build-programs=yes
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else
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build-programs=no
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endif
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endif
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# Common prefix for machine-dependent installation directories.
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ifeq ($(origin exec_prefix),undefined)
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exec_prefix = $(prefix)
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endif
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# Where to install the library and object files.
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ifndef libdir
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libdir = $(exec_prefix)/lib
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endif
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inst_libdir = $(install_root)$(libdir)
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# Where to install the shared library.
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ifndef slibdir
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slibdir = $(exec_prefix)/lib
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endif
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inst_slibdir = $(install_root)$(slibdir)
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# Where to install the dynamic linker.
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ifndef rtlddir
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rtlddir = $(slibdir)
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endif
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inst_rtlddir = $(install_root)$(rtlddir)
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# Prefix to put on files installed in $(libdir). For libraries `libNAME.a',
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# the prefix is spliced between `lib' and the name, so the linker switch
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# `-l$(libprefix)NAME' finds the library; for other files the prefix is
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# just prepended to the whole file name.
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ifeq ($(origin libprefix),undefined)
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libprefix =
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endif
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# Where to install the header files.
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ifndef includedir
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includedir = $(prefix)/include
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endif
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inst_includedir = $(install_root)$(includedir)
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# Where to install machine-independent data files.
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# These are the timezone database, and the locale database.
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ifndef datadir
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datadir = $(prefix)/share
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endif
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inst_datadir = $(install_root)$(datadir)
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# Where to install the timezone data files (which are machine-independent).
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ifndef zonedir
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zonedir = $(datadir)/zoneinfo
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endif
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inst_zonedir = $(install_root)$(zonedir)
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# Where to install the compiled binary locale archive and compiled
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# binary locale files.
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ifndef complocaledir
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complocaledir = $(libdir)/locale
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endif
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inst_complocaledir = $(install_root)$(complocaledir)
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# Where to install the message catalog data files (which are
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# machine-independent).
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ifndef localedir
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localedir = $(datadir)/locale
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endif
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inst_localedir = $(install_root)$(localedir)
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# Where to install the locale charmap source files.
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ifndef i18ndir
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i18ndir = $(datadir)/i18n
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endif
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inst_i18ndir = $(install_root)$(i18ndir)
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# Where to install the shared object for charset transformation.
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ifndef gconvdir
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gconvdir = $(libdir)/gconv
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endif
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inst_gconvdir = $(install_root)$(gconvdir)
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# Where to install programs.
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ifndef bindir
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bindir = $(exec_prefix)/bin
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endif
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inst_bindir = $(install_root)$(bindir)
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# Where to install internal programs.
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ifndef libexecdir
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libexecdir = $(exec_prefix)/libexec
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endif
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inst_libexecdir = $(install_root)$(libexecdir)
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# Where to install administrative programs.
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ifndef rootsbindir
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rootsbindir = $(exec_prefix)/sbin
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endif
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inst_rootsbindir = $(install_root)$(rootsbindir)
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ifndef sbindir
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sbindir = $(exec_prefix)/sbin
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endif
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inst_sbindir = $(install_root)$(sbindir)
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# Where to install the Info files.
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ifndef infodir
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infodir = $(prefix)/info
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endif
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inst_infodir = $(install_root)$(infodir)
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# Where to install audit libraries.
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ifndef auditdir
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auditdir = $(libdir)/audit
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endif
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inst_auditdir = $(install_root)$(auditdir)
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# Where to install default configuration files. These include the local
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# timezone specification and network data base files.
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ifndef sysconfdir
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sysconfdir = $(prefix)/etc
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endif
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inst_sysconfdir = $(install_root)$(sysconfdir)
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# Directory for the database files and Makefile for nss_db.
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ifndef vardbdir
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vardbdir = $(localstatedir)/db
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endif
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inst_vardbdir = $(install_root)$(vardbdir)
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# Where to install the "localtime" timezone file; this is the file whose
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# contents $(localtime) specifies. If this is a relative pathname, it is
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# relative to $(zonedir). It is a good idea to put this somewhere
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# other than there, so the zoneinfo directory contains only universal data,
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# localizing the configuration data elsewhere.
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ifndef localtime-file
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localtime-file = $(sysconfdir)/localtime
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endif
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# What to use for leap second specifications in compiling the default
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# timezone files. Set this to `/dev/null' for no leap second handling as
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# 1003.1 requires, or to `leapseconds' for proper leap second handling.
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# Both zone flavors are always available as `posix/ZONE' and `right/ZONE'.
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# This variable determines the default: if it's `/dev/null',
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# ZONE==posix/ZONE; if it's `leapseconds', ZONE==right/ZONE.
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ifndef leapseconds
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leapseconds = /dev/null
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endif
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# What timezone's DST rules should be used when a POSIX-style TZ
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# environment variable doesn't specify any rules. For 1003.1 compliance
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# this timezone must use rules that are as U.S. federal law defines DST.
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# Run `make -C time echo-zonenames' to see a list of available zone names.
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# This setting can be changed with `zic -p TIMEZONE' at any time.
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# If you want POSIX.1 compatibility, use `America/New_York'.
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ifndef posixrules
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posixrules = America/New_York
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endif
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# Where to install the "posixrules" timezone file; this is file
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# whose contents $(posixrules) specifies. If this is a relative
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# pathname, it is relative to $(zonedir).
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ifndef posixrules-file
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posixrules-file = posixrules
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endif
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# Directory where your system's native header files live.
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# This is used on Unix systems to generate some GNU libc header files.
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ifndef sysincludedir
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sysincludedir = /usr/include
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endif
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# Commands to install files.
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ifndef INSTALL_DATA
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INSTALL_DATA = $(INSTALL) -m 644
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endif
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ifndef INSTALL_SCRIPT
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INSTALL_SCRIPT = $(INSTALL)
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endif
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ifndef INSTALL_PROGRAM
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INSTALL_PROGRAM = $(INSTALL)
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endif
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ifndef INSTALL
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INSTALL = install
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endif
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# The name of the C compiler.
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# If you've got GCC, and it works, use it.
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ifeq ($(origin CC),default)
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CC := gcc
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endif
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# The name of the C compiler to use for compilations of programs to run on
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# the host that is building the library. If you set CC to a
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# cross-compiler, you must set this to the normal compiler.
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ifndef BUILD_CC
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BUILD_CC = $(CC)
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endif
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# Default flags to pass the C compiler.
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ifndef default_cflags
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ifeq ($(release),stable)
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default_cflags := -g -O2
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else
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default_cflags := -g -O
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endif
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endif
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# Flags to pass the C compiler when assembling preprocessed assembly code
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# (`.S' files).
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ifndef asm-CPPFLAGS
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asm-CPPFLAGS =
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endif
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# Must be supported by the linker.
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no-whole-archive = -Wl,--no-whole-archive
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whole-archive = -Wl,--whole-archive
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# Installed name of the startup code.
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# The ELF convention is that the startfile is called crt1.o
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start-installed-name = crt1.o
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# On systems that do not need a special startfile for statically linked
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# binaries, simply set it to the normal name.
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ifndef static-start-installed-name
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static-start-installed-name = $(start-installed-name)
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endif
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ifeq (yes,$(enable-static-pie))
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# Link with rcrt1.o, instead of crt1.o, to call _dl_relocate_static_pie
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# to relocate static PIE.
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real-static-start-installed-name = r$(static-start-installed-name)
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else
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real-static-start-installed-name = $(static-start-installed-name)
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endif
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ifeq (yesyes,$(build-shared)$(have-z-combreloc))
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combreloc-LDFLAGS = -Wl,-z,combreloc
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LDFLAGS.so += $(combreloc-LDFLAGS)
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LDFLAGS-rtld += $(combreloc-LDFLAGS)
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endif
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relro-LDFLAGS = -Wl,-z,relro
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LDFLAGS.so += $(relro-LDFLAGS)
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LDFLAGS-rtld += $(relro-LDFLAGS)
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ifeq (yes,$(have-hash-style))
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# For the time being we unconditionally use 'both'. At some time we
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# should declare statically linked code as 'out of luck' and compile
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# with --hash-style=gnu only.
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hashstyle-LDFLAGS = -Wl,--hash-style=both
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LDFLAGS.so += $(hashstyle-LDFLAGS)
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LDFLAGS-rtld += $(hashstyle-LDFLAGS)
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endif
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ifeq (no,$(build-pie-default))
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pie-default = $(no-pie-ccflag)
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else # build-pie-default
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pic-default = -DPIC
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# Compile libc.a and libc_p.a with -fPIE/-fpie for static PIE.
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pie-default = $(pie-ccflag)
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ifeq (yes,$(enable-static-pie))
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ifeq (yes,$(have-static-pie))
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static-pie-ldflag = -static-pie
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else
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# Static PIE can't have dynamic relocations in read-only segments since
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# static PIE is mapped into memory by kernel. --eh-frame-hdr is needed
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# for PIE to support exception.
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static-pie-ldflag = -Wl,-pie,--no-dynamic-linker,--eh-frame-hdr,-z,text
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endif # have-static-pie
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endif # enable-static-pie
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endif # build-pie-default
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# If lazy relocations are disabled, add the -z now flag. Use
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# LDFLAGS-lib.so instead of LDFLAGS.so, to avoid adding the flag to
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# test modules.
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ifeq ($(bind-now),yes)
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LDFLAGS-lib.so += -Wl,-z,now
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# Extra flags for dynamically linked non-test main programs.
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link-extra-flags += -Wl,-z,now
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endif
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|
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# Command to run after every final link (executable or shared object).
|
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# This is invoked with $(call after-link,...), so it should operate on
|
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# the file $1. This can be set to do some sort of post-processing on
|
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# binaries, or to perform some sort of static sanity check.
|
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ifndef after-link
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after-link =
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endif
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|
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# Additional libraries to link into every test.
|
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link-extra-libs-tests = $(libsupport)
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|
||
# Command for linking PIE programs with the C library.
|
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ifndef +link-pie
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+link-pie-before-inputs = $(if $($(@F)-no-pie),$(no-pie-ldflag),-pie) \
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-Wl,-O1 -nostdlib -nostartfiles \
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$(sysdep-LDFLAGS) $(LDFLAGS) $(LDFLAGS-$(@F)) \
|
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$(combreloc-LDFLAGS) $(relro-LDFLAGS) $(hashstyle-LDFLAGS) \
|
||
$(firstword $(CRT-$(@F)) $(csu-objpfx)S$(start-installed-name)) \
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$(+preinit) $(+prectorS)
|
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+link-pie-before-libc = -o $@ $(+link-pie-before-inputs) \
|
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$(filter-out $(addprefix $(csu-objpfx),start.o \
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S$(start-installed-name))\
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$(+preinit) $(link-extra-libs) \
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$(common-objpfx)libc% $(+postinit),$^) \
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||
$(link-extra-libs)
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+link-pie-after-libc = $(+postctorS) $(+postinit)
|
||
define +link-pie
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$(CC) $(link-libc-rpath-link) $(+link-pie-before-libc) $(rtld-LDFLAGS) \
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$(link-extra-flags) $(link-libc) $(+link-pie-after-libc)
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$(call after-link,$@)
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endef
|
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define +link-pie-tests
|
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$(CC) $(+link-pie-before-libc) $(rtld-tests-LDFLAGS) $(link-libc-tests) \
|
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$(+link-pie-after-libc)
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$(call after-link,$@)
|
||
endef
|
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define +link-pie-printers-tests
|
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$(CC) $(+link-pie-before-libc) $(built-rtld-LDFLAGS) \
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$(link-libc-printers-tests) $(+link-pie-after-libc)
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||
$(call after-link,$@)
|
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endef
|
||
endif
|
||
# Command for statically linking programs with the C library.
|
||
ifndef +link-static
|
||
+link-static-before-inputs = -nostdlib -nostartfiles -static \
|
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$(if $($(@F)-no-pie),$(no-pie-ldflag),$(static-pie-ldflag)) \
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$(sysdep-LDFLAGS) $(LDFLAGS) $(LDFLAGS-$(@F)) \
|
||
$(firstword $(CRT-$(@F)) $(csu-objpfx)$(real-static-start-installed-name)) \
|
||
$(+preinit) $(+prectorT)
|
||
+link-static-before-libc = -o $@ $(+link-static-before-inputs) \
|
||
$(filter-out $(addprefix $(csu-objpfx),start.o \
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||
$(start-installed-name))\
|
||
$(+preinit) $(link-extra-libs-static) \
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$(common-objpfx)libc% $(+postinit),$^) \
|
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$(link-extra-libs-static)
|
||
+link-static-after-libc = $(+postctorT) $(+postinit)
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||
define +link-static
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||
$(CC) $(+link-static-before-libc) $(link-extra-flags) $(link-libc-static) \
|
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$(+link-static-after-libc)
|
||
$(call after-link,$@)
|
||
endef
|
||
define +link-static-tests
|
||
$(CC) $(+link-static-before-libc) $(link-libc-static-tests) \
|
||
$(+link-static-after-libc)
|
||
$(call after-link,$@)
|
||
endef
|
||
endif
|
||
# Commands for linking programs with the C library.
|
||
ifndef +link
|
||
ifeq (yes,$(build-shared))
|
||
ifeq (yes,$(cc-pie-default))
|
||
no-pie-ldflag = -no-pie
|
||
endif
|
||
ifeq (yes,$(build-pie-default))
|
||
+link = $(+link-pie)
|
||
+link-tests = $(+link-pie-tests)
|
||
+link-tests-before-inputs = $(+link-pie-before-inputs) $(rtld-tests-LDFLAGS)
|
||
+link-tests-after-inputs = $(link-libc-tests) $(+link-pie-after-libc)
|
||
+link-printers-tests = $(+link-pie-printers-tests)
|
||
else # not build-pie-default
|
||
+link-before-inputs = -nostdlib -nostartfiles $(no-pie-ldflag) \
|
||
$(sysdep-LDFLAGS) $(LDFLAGS) $(LDFLAGS-$(@F)) \
|
||
$(combreloc-LDFLAGS) $(relro-LDFLAGS) $(hashstyle-LDFLAGS) \
|
||
$(firstword $(CRT-$(@F)) $(csu-objpfx)$(start-installed-name)) \
|
||
$(+preinit) $(+prector)
|
||
+link-before-libc = -o $@ $(+link-before-inputs) \
|
||
$(filter-out $(addprefix $(csu-objpfx),start.o \
|
||
$(start-installed-name))\
|
||
$(+preinit) $(link-extra-libs) \
|
||
$(common-objpfx)libc% $(+postinit),$^) \
|
||
$(link-extra-libs)
|
||
+link-after-libc = $(+postctor) $(+postinit)
|
||
define +link
|
||
$(CC) $(link-libc-rpath-link) $(+link-before-libc) $(rtld-LDFLAGS) \
|
||
$(link-extra-flags) $(link-libc) $(+link-after-libc)
|
||
$(call after-link,$@)
|
||
endef
|
||
+link-tests-before-inputs = $(+link-before-inputs) $(rtld-tests-LDFLAGS)
|
||
+link-tests-after-inputs = $(link-libc-tests) $(+link-after-libc)
|
||
define +link-tests
|
||
$(CC) $(+link-before-libc) $(rtld-tests-LDFLAGS) $(link-libc-tests) \
|
||
$(+link-after-libc)
|
||
$(call after-link,$@)
|
||
endef
|
||
define +link-printers-tests
|
||
$(CC) $(+link-before-libc) $(built-rtld-LDFLAGS) $(link-libc-printers-tests) \
|
||
$(+link-after-libc)
|
||
$(call after-link,$@)
|
||
endef
|
||
endif # build-pie-default
|
||
else # build-static
|
||
+link = $(+link-static)
|
||
+link-tests = $(+link-static-tests)
|
||
+link-tests-before-inputs = $(+link-static-before-inputs)
|
||
+link-tests-after-inputs = $(link-libc-static-tests) $(+link-static-after-libc)
|
||
+link-printers-tests = $(+link-static-tests)
|
||
endif # build-shared
|
||
endif # +link
|
||
|
||
# The pretty printer test programs need to be compiled without optimizations
|
||
# so they won't confuse gdb. We could use either the 'GCC optimize' pragma
|
||
# or the 'optimize' function attribute to achieve this; however, at least on
|
||
# ARM, gcc always produces different debugging symbols when invoked with
|
||
# a -O greater than 0 than when invoked with -O0, regardless of anything else
|
||
# we're using to suppress optimizations. Therefore, we need to explicitly pass
|
||
# -O0 to it through CFLAGS.
|
||
# Additionally, the build system will try to -include $(common-objpfx)/config.h
|
||
# when compiling the tests, which will throw an error if some special macros
|
||
# (such as __OPTIMIZE__ and IS_IN_build) aren't defined. To avoid this, we
|
||
# tell gcc to define IS_IN_build.
|
||
CFLAGS-printers-tests := -O0 -ggdb3 -DIS_IN_build
|
||
|
||
ifeq (yes,$(build-shared))
|
||
# These indicate whether to link using the built ld.so or the installed one.
|
||
installed-rtld-LDFLAGS = -Wl,-dynamic-linker=$(rtlddir)/$(rtld-installed-name)
|
||
built-rtld-LDFLAGS = -Wl,-dynamic-linker=$(elf-objpfx)ld.so
|
||
|
||
ifndef rtld-LDFLAGS
|
||
rtld-LDFLAGS = $(installed-rtld-LDFLAGS)
|
||
endif
|
||
|
||
ifndef rtld-tests-LDFLAGS
|
||
ifeq (yes,$(build-hardcoded-path-in-tests))
|
||
rtld-tests-LDFLAGS = $(built-rtld-LDFLAGS)
|
||
else
|
||
rtld-tests-LDFLAGS = $(installed-rtld-LDFLAGS)
|
||
endif # build-hardcoded-path-in-tests
|
||
endif # rtld-tests-LDFLAGS
|
||
|
||
endif # build-shared
|
||
|
||
ifndef link-libc
|
||
ifeq (yes,$(build-shared))
|
||
# We need the versioned name of libc.so in the deps of $(others) et al
|
||
# so that the symlink to libc.so is created before anything tries to
|
||
# run the linked programs.
|
||
link-libc-rpath = -Wl,-rpath=$(rpath-link)
|
||
link-libc-rpath-link = -Wl,-rpath-link=$(rpath-link)
|
||
|
||
# For programs which are not tests, $(link-libc-rpath-link) is added
|
||
# directly in $(+link), $(+link-pie) above, so that -Wl,-rpath-link
|
||
# comes before the expansion of LDLIBS-* and affects libraries added
|
||
# there. For shared objects, -Wl,-rpath-link is added via
|
||
# $(build-shlib-helper) and $(build-module-helper) in Makerules (also
|
||
# before the expansion of LDLIBS-* variables).
|
||
|
||
# Tests use -Wl,-rpath instead of -Wl,-rpath-link for
|
||
# build-hardcoded-path-in-tests.
|
||
ifeq (yes,$(build-hardcoded-path-in-tests))
|
||
link-libc-tests-rpath-link = $(link-libc-rpath)
|
||
link-test-modules-rpath-link = $(link-libc-rpath)
|
||
else
|
||
link-libc-tests-rpath-link = $(link-libc-rpath-link)
|
||
link-test-modules-rpath-link =
|
||
endif # build-hardcoded-path-in-tests
|
||
|
||
link-libc-between-gnulib = $(common-objpfx)libc.so$(libc.so-version) \
|
||
$(common-objpfx)$(patsubst %,$(libtype.oS),c) \
|
||
-Wl,--as-needed $(elf-objpfx)ld.so \
|
||
-Wl,--no-as-needed
|
||
link-libc = $(link-libc-between-gnulib) $(gnulib)
|
||
|
||
link-libc-tests-after-rpath-link = $(gnulib-tests) $(link-libc-between-gnulib) $(gnulib-tests)
|
||
link-libc-tests = $(link-libc-tests-rpath-link) \
|
||
$(link-libc-tests-after-rpath-link)
|
||
# Pretty printer test programs always require rpath instead of rpath-link.
|
||
link-libc-printers-tests = $(link-libc-rpath) \
|
||
$(link-libc-tests-after-rpath-link)
|
||
|
||
# This is how to find at build-time things that will be installed there.
|
||
rpath-dirs = math elf dlfcn nss nis rt resolv mathvec support
|
||
rpath-link = \
|
||
$(common-objdir):$(subst $(empty) ,:,$(patsubst ../$(subdir),.,$(rpath-dirs:%=$(common-objpfx)%)))
|
||
else # build-static
|
||
link-libc = $(common-objpfx)libc.a $(otherlibs) $(gnulib) $(common-objpfx)libc.a $(gnulib)
|
||
link-libc-tests = $(common-objpfx)libc.a $(otherlibs) $(gnulib-tests) $(common-objpfx)libc.a $(gnulib-tests)
|
||
endif # build-shared
|
||
endif # link-libc
|
||
|
||
# Differences in the linkers on the various platforms.
|
||
LDFLAGS-rpath-ORIGIN = -Wl,-rpath,'$$ORIGIN'
|
||
LDFLAGS-soname-fname = -Wl,-soname,$(@F)
|
||
LDFLAGS-rdynamic = -rdynamic
|
||
LDFLAGS-Bsymbolic = -Bsymbolic
|
||
|
||
# Choose the default search path for the dynamic linker based on
|
||
# where we will install libraries.
|
||
ifneq ($(libdir),$(slibdir))
|
||
default-rpath = $(slibdir):$(libdir)
|
||
else
|
||
default-rpath = $(libdir)
|
||
endif
|
||
|
||
ifndef link-extra-libs
|
||
link-extra-libs = $(LDLIBS-$(@F))
|
||
link-extra-libs-static = $(link-extra-libs)
|
||
endif
|
||
|
||
# The static libraries.
|
||
link-libc-static = -Wl,--start-group $(common-objpfx)libc.a $(static-gnulib) -Wl,--end-group
|
||
link-libc-static-tests = -Wl,--start-group $(common-objpfx)libc.a $(static-gnulib-tests) -Wl,--end-group
|
||
|
||
# How to link against libgcc. Some libgcc functions, such as those
|
||
# for "long long" arithmetic or software floating point, can always be
|
||
# built without use of C library headers and do not have any global
|
||
# state so can safely be linked statically into any executable or
|
||
# shared library requiring them; these functions are in libgcc.a.
|
||
# Other functions, relating to exception handling, may require C
|
||
# library headers to build and it may not be safe to have more than
|
||
# one copy of them in a process; these functions are only in
|
||
# libgcc_s.so and libgcc_eh.a.
|
||
#
|
||
# To avoid circular dependencies when bootstrapping, it is desirable
|
||
# to avoid use of libgcc_s and libgcc_eh in building glibc. Where any
|
||
# glibc functionality (in particular, thread cancellation) requires
|
||
# exception handling, this is implemented through dlopen of libgcc_s
|
||
# to avoid unnecessary dependencies on libgcc_s by programs not using
|
||
# that functionality; executables built with glibc do not use
|
||
# exception handling other than through thread cancellation.
|
||
#
|
||
# Undefined references to functions from libgcc_eh or libgcc_s may
|
||
# arise for code built with -fexceptions. In the case of statically
|
||
# linked programs installed by glibc, unwinding will never actually
|
||
# occur at runtime and the use of elf/static-stubs.c to resolve these
|
||
# references is safe. In the case of statically linked test programs
|
||
# and test programs built with -fexceptions, unwinding may occur in
|
||
# some cases and it is preferable to link with libgcc_eh or libgcc_s
|
||
# so that the testing is as similar as possible to how programs will
|
||
# be built with the installed glibc.
|
||
#
|
||
# Some architectures have architecture-specific systems for exception
|
||
# handling that may involve undefined references to
|
||
# architecture-specific functions. On those architectures,
|
||
# gnulib-arch and static-gnulib-arch may be defined in sysdeps
|
||
# makefiles to use additional libraries for linking executables and
|
||
# shared libraries built by glibc.
|
||
ifndef gnulib
|
||
ifneq ($(have-cc-with-libunwind),yes)
|
||
libunwind =
|
||
else
|
||
libunwind = -lunwind
|
||
endif
|
||
libgcc_eh := -Wl,--as-needed -lgcc_s $(libunwind) -Wl,--no-as-needed
|
||
gnulib-arch =
|
||
gnulib = -lgcc $(gnulib-arch)
|
||
gnulib-tests := -lgcc $(libgcc_eh)
|
||
static-gnulib-arch =
|
||
# By default, elf/static-stubs.o, instead of -lgcc_eh, is used to
|
||
# statically link programs. When --disable-shared is used, we use
|
||
# -lgcc_eh since elf/static-stubs.o isn't sufficient.
|
||
ifeq (yes,$(build-shared))
|
||
static-gnulib = -lgcc $(static-gnulib-arch)
|
||
else
|
||
static-gnulib = -lgcc -lgcc_eh $(static-gnulib-arch)
|
||
endif
|
||
static-gnulib-tests := -lgcc -lgcc_eh $(libunwind)
|
||
libc.so-gnulib := -lgcc
|
||
endif
|
||
+preinit = $(addprefix $(csu-objpfx),crti.o)
|
||
+postinit = $(addprefix $(csu-objpfx),crtn.o)
|
||
+prector = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtbegin.o`
|
||
+postctor = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtend.o`
|
||
# Variants of the two previous definitions for linking PIE programs.
|
||
+prectorS = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtbeginS.o`
|
||
+postctorS = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtendS.o`
|
||
# Variants of the two previous definitions for statically linking programs.
|
||
ifeq (yes,$(enable-static-pie))
|
||
# Static PIE must use PIE variants.
|
||
+prectorT = $(+prectorS)
|
||
+postctorT = $(+postctorS)
|
||
else
|
||
+prectorT = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtbeginT.o`
|
||
+postctorT = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtend.o`
|
||
endif
|
||
csu-objpfx = $(common-objpfx)csu/
|
||
elf-objpfx = $(common-objpfx)elf/
|
||
|
||
# A command that, prepended to the name and arguments of a program,
|
||
# and run on the build system, causes that program with those
|
||
# arguments to be run on the host for which the library is built.
|
||
ifndef test-wrapper
|
||
test-wrapper =
|
||
endif
|
||
# Likewise, but the name of the program is preceded by
|
||
# <variable>=<value> assignments for environment variables.
|
||
ifndef test-wrapper-env
|
||
test-wrapper-env = $(test-wrapper) env
|
||
endif
|
||
# Likewise, but the program's environment will be empty except for any
|
||
# explicit <variable>=<value> assignments preceding the program name.
|
||
ifndef test-wrapper-env-only
|
||
test-wrapper-env-only = $(test-wrapper) env -i
|
||
endif
|
||
|
||
# Whether to run test programs built for the library's host system.
|
||
ifndef run-built-tests
|
||
ifeq (yes|,$(cross-compiling)|$(test-wrapper))
|
||
run-built-tests = no
|
||
else
|
||
run-built-tests = yes
|
||
endif
|
||
endif
|
||
|
||
# Whether to stop immediately when a test fails. Nonempty means to
|
||
# stop, empty means not to stop.
|
||
ifndef stop-on-test-failure
|
||
stop-on-test-failure =
|
||
endif
|
||
|
||
# How to run a program we just linked with our library.
|
||
# The program binary is assumed to be $(word 2,$^).
|
||
built-program-file = $(dir $(word 2,$^))$(notdir $(word 2,$^))
|
||
rtld-prefix = $(elf-objpfx)$(rtld-installed-name) \
|
||
--library-path \
|
||
$(rpath-link)$(patsubst %,:%,$(sysdep-library-path))
|
||
ifeq (yes,$(build-shared))
|
||
comma = ,
|
||
sysdep-library-path = \
|
||
$(subst $(empty) ,:,$(strip $(patsubst -Wl$(comma)-rpath-link=%, %,\
|
||
$(filter -Wl$(comma)-rpath-link=%,\
|
||
$(sysdep-LDFLAGS)))))
|
||
# $(run-via-rtld-prefix) is a command that, when prepended to the name
|
||
# of a program built with the newly built library, produces a command
|
||
# that, executed on the host for which the library is built, runs that
|
||
# program. For tests listed in tests-static or xtests-static, it is
|
||
# empty.
|
||
run-via-rtld-prefix = \
|
||
$(if $(strip $(filter $(notdir $(built-program-file)), \
|
||
$(tests-static) $(xtests-static))),, $(rtld-prefix))
|
||
else
|
||
run-via-rtld-prefix =
|
||
endif
|
||
# $(run-program-env) is the default environment variable settings to
|
||
# use when running a program built with the newly built library.
|
||
run-program-env = GCONV_PATH=$(common-objpfx)iconvdata \
|
||
LOCPATH=$(common-objpfx)localedata LC_ALL=C
|
||
# $(run-program-prefix) is a command that, when prepended to the name
|
||
# of a program built with the newly built library, produces a command
|
||
# that, executed on the build system on which "make" is run, runs that
|
||
# program. $(run-program-prefix-before-env) and
|
||
# $(run-program-prefix-after-env) are similar, but separate parts
|
||
# before and after a list of environment variables.
|
||
run-program-prefix-before-env = $(test-wrapper-env)
|
||
run-program-prefix-after-env = $(run-via-rtld-prefix)
|
||
run-program-prefix = $(run-program-prefix-before-env) $(run-program-env) \
|
||
$(run-program-prefix-after-env)
|
||
# $(built-program-cmd) is a command that, executed on the build system
|
||
# on which "make" is run, runs the newly built program that is the
|
||
# second dependency of the makefile target in which
|
||
# $(built-program-cmd) is used. $(built-program-cmd-before-env) and
|
||
# $(built-program-cmd-after-env) are similar, before and after a list
|
||
# of environment variables.
|
||
built-program-cmd-before-env = $(test-wrapper-env)
|
||
built-program-cmd-after-env = $(run-via-rtld-prefix) $(built-program-file)
|
||
built-program-cmd = $(built-program-cmd-before-env) $(run-program-env) \
|
||
$(built-program-cmd-after-env)
|
||
# $(host-built-program-cmd) is a command that, executed on the host
|
||
# for which the library is built, runs the newly built program that is
|
||
# the second dependency of the makefile target in which
|
||
# $(host-built-program-cmd) is used.
|
||
host-built-program-cmd = $(run-via-rtld-prefix) $(built-program-file)
|
||
# $(ld-library-path) is the common content to be set in LD_LIBRARY_PATH
|
||
# for running static binaries that may load dynamic objects.
|
||
ld-library-path = $(objpfx):$(common-objpfx)$(addprefix :,$(sysdep-ld-library-path))
|
||
|
||
ifndef LD
|
||
LD := ld -X
|
||
endif
|
||
|
||
# $(test-via-rtld-prefix) is a command that, when prepended to the name
|
||
# of a test program built with the newly built library, produces a command
|
||
# that, executed on the host for which the library is built, runs that
|
||
# program. For tests listed in tests-static or xtests-static as well
|
||
# as when test programs are hardcoded to the newly built libraries, it
|
||
# is empty.
|
||
|
||
# $(test-program-prefix) is a command that, when prepended to the name
|
||
# of a test program built with the newly built library, produces a command
|
||
# that, executed on the build system on which "make" is run, runs that
|
||
# test program. $(test-program-prefix-before-env) and
|
||
# $(test-program-prefix-after-env) are similar, before and after a
|
||
# list of environment variables.
|
||
|
||
# $(test-program-cmd) is a command that, executed on the build system
|
||
# on which "make" is run, runs the newly built test program that is the
|
||
# second dependency of the makefile target in which
|
||
# $(test-program-cmd) is used. $(test-program-cmd-before-env) and
|
||
# $(test-program-cmd-after-env) are similar, before and after a list
|
||
# of environment variables.
|
||
|
||
# $(host-test-program-cmd) is a command that, executed on the host
|
||
# for which the library is built, runs the newly built test program that
|
||
# is the second dependency of the makefile target in which
|
||
# $(host-test-program-cmd) is used.
|
||
|
||
ifeq (yes,$(build-hardcoded-path-in-tests))
|
||
test-via-rtld-prefix =
|
||
test-program-prefix-before-env = $(test-wrapper-env)
|
||
test-program-prefix-after-env =
|
||
test-program-prefix = $(test-program-prefix-before-env) $(run-program-env) \
|
||
$(test-program-prefix-after-env)
|
||
test-program-cmd-before-env = $(test-wrapper-env)
|
||
test-program-cmd-after-env = $(built-program-file)
|
||
test-program-cmd = $(test-program-cmd-before-env) $(run-program-env) \
|
||
$(test-program-cmd-after-env)
|
||
host-test-program-cmd = $(built-program-file)
|
||
else
|
||
test-via-rtld-prefix = $(run-via-rtld-prefix)
|
||
test-program-prefix-before-env = $(run-program-prefix-before-env)
|
||
test-program-prefix-after-env = $(run-program-prefix-after-env)
|
||
test-program-prefix = $(run-program-prefix)
|
||
test-program-cmd-before-env = $(built-program-cmd-before-env)
|
||
test-program-cmd-after-env = $(built-program-cmd-after-env)
|
||
test-program-cmd = $(built-program-cmd)
|
||
host-test-program-cmd = $(host-built-program-cmd)
|
||
endif
|
||
|
||
# Extra flags to pass to GCC.
|
||
ifeq ($(all-warnings),yes)
|
||
+gccwarn := -Wall -Wwrite-strings -Wcast-qual -Wbad-function-cast -Wmissing-noreturn -Wmissing-prototypes -Wmissing-declarations -Wcomment -Wcomments -Wtrigraphs -Wsign-compare -Wfloat-equal -Wmultichar
|
||
else
|
||
+gccwarn := -Wall -Wwrite-strings
|
||
endif
|
||
+gccwarn += -Wundef
|
||
ifeq ($(enable-werror),yes)
|
||
+gccwarn += -Werror
|
||
endif
|
||
+gccwarn-c = -Wstrict-prototypes -Wold-style-definition
|
||
|
||
# We do not depend on the address of constants in different files to be
|
||
# actually different, so allow the compiler to merge them all.
|
||
+merge-constants = -fmerge-all-constants
|
||
|
||
# We have to assume that glibc functions are called in any rounding
|
||
# mode and also change the rounding mode in a few functions. So,
|
||
# disable any optimization that assume default rounding mode.
|
||
+math-flags = -frounding-math
|
||
|
||
# Logically only "libnldbl", "nonlib" and "testsuite" should be using
|
||
# -fno-math-errno. However due to GCC bug #88576, only "libm" can use
|
||
# -fno-math-errno.
|
||
+extra-math-flags = $(if $(filter libm,$(in-module)),-fno-math-errno,-fmath-errno)
|
||
|
||
# Use 64 bit time_t support for installed programs
|
||
installed-modules = nonlib nscd lddlibc4 ldconfig locale_programs \
|
||
iconvprogs libnss_files libnss_compat libnss_db libnss_hesiod \
|
||
libutil libpcprofile libSegFault
|
||
+extra-time-flags = $(if $(filter $(installed-modules),\
|
||
$(in-module)),-D_TIME_BITS=64 -D_FILE_OFFSET_BITS=64)
|
||
|
||
# We might want to compile with some stack-protection flag.
|
||
ifneq ($(stack-protector),)
|
||
+stack-protector=$(stack-protector)
|
||
endif
|
||
|
||
# Some routines are unsafe to build with stack-protection since they're called
|
||
# before the stack check guard is set up. Provide a way to disable stack
|
||
# protector. The first argument is the extension (.o, .os, .oS) and the second
|
||
# is a list of routines that this path should be applied to.
|
||
define elide-stack-protector
|
||
$(if $(filter $(@F),$(patsubst %,%$(1),$(2))), $(no-stack-protector))
|
||
endef
|
||
|
||
# The program that makes Emacs-style TAGS files.
|
||
ETAGS := etags
|
||
|
||
# The `xgettext' program for producing .pot files from sources.
|
||
ifndef XGETTEXT
|
||
XGETTEXT = xgettext
|
||
endif
|
||
|
||
# The `m4' macro processor; this is used by sysdeps/sparc/Makefile (and
|
||
# perhaps others) to preprocess assembly code in some cases.
|
||
M4 = m4
|
||
|
||
# To force installation of files even if they are older than the
|
||
# installed files. This variable is included in the dependency list
|
||
# of all installation targets.
|
||
ifeq ($(force-install),yes)
|
||
+force = force-install
|
||
else
|
||
+force =
|
||
endif
|
||
|
||
####
|
||
#### End of configuration variables.
|
||
####
|
||
|
||
# This tells some versions of GNU make before 3.63 not to export all variables.
|
||
.NOEXPORT:
|
||
|
||
# We want to echo the commands we're running without
|
||
# umpteen zillion filenames along with it (we use `...' instead)
|
||
# but we don't want this echoing done when the user has said
|
||
# he doesn't want to see commands echoed by using -s.
|
||
ifneq "$(findstring s,$(MAKEFLAGS))" "" # if -s
|
||
+cmdecho := echo >/dev/null
|
||
else # not -s
|
||
+cmdecho := echo
|
||
endif # -s
|
||
|
||
# These are the flags given to the compiler to tell
|
||
# it what sort of optimization and/or debugging output to do.
|
||
ifndef +cflags
|
||
# If `CFLAGS' was defined, use that.
|
||
ifdef CFLAGS
|
||
+cflags := $(filter-out -I%,$(CFLAGS))
|
||
endif # CFLAGS
|
||
endif # +cflags
|
||
|
||
# If none of the above worked, default to "-g -O".
|
||
ifeq "$(strip $(+cflags))" ""
|
||
+cflags := $(default_cflags)
|
||
endif # $(+cflags) == ""
|
||
|
||
# Force building with -fno-common because hidden_def, compat_symbol
|
||
# and other constructs do not work for common symbols (and would
|
||
# otherwise require specifying __attribute__ ((nocommon)) on a
|
||
# case-by-case basis).
|
||
+cflags += $(cflags-cpu) $(+gccwarn) $(+merge-constants) $(+math-flags) \
|
||
$(+stack-protector) -fno-common
|
||
+gcc-nowarn := -w
|
||
|
||
# Each sysdeps directory can contain header files that both will be
|
||
# used to compile and will be installed. Each can also contain an
|
||
# include/ subdirectory, whose header files will be used to compile
|
||
# but will not be installed, and will take precedence over the
|
||
# installed files. This mirrors the top-level include/ subdirectory.
|
||
+sysdep-includes := $(foreach dir,$(+sysdep_dirs),\
|
||
$(addprefix -I,$(wildcard $(dir)/include) $(dir)))
|
||
|
||
# These are flags given to the C compiler to tell it to look for
|
||
# include files (including ones given in angle brackets) in the parent
|
||
# library source directory, in the include directory, and in the
|
||
# current directory.
|
||
+includes = -I$(..)include $(if $(subdir),$(objpfx:%/=-I%)) \
|
||
$(+sysdep-includes) $(includes) \
|
||
$(patsubst %/,-I%,$(..)) $(libio-include) -I. $(sysincludes)
|
||
|
||
# Since libio has several internal header files, we use a -I instead
|
||
# of many little headers in the include directory.
|
||
libio-include = -I$(..)libio
|
||
|
||
# List of non-library modules that we build.
|
||
built-modules = iconvprogs iconvdata ldconfig lddlibc4 libmemusage \
|
||
libSegFault libpcprofile librpcsvc locale-programs \
|
||
memusagestat nonlib nscd extramodules libnldbl libsupport \
|
||
testsuite testsuite-internal
|
||
|
||
in-module = $(subst -,_,$(firstword $(libof-$(basename $(@F))) \
|
||
$(libof-$(<F)) \
|
||
$(libof-$(@F)) \
|
||
libc))
|
||
|
||
# Build ld.so, libc.so and libpthread.so with -ftls-model=initial-exec
|
||
tls-model = $(if $(filter libpthread rtld \
|
||
libc,$(in-module)),-ftls-model=initial-exec,)
|
||
|
||
module-cppflags-real = -include $(common-objpfx)libc-modules.h \
|
||
-DMODULE_NAME=$(in-module)
|
||
|
||
# We don't need libc-modules.h and the MODULE_NAME definition for .v.i
|
||
# files. These targets don't (and will likely never need to) use the IS_IN
|
||
# facility. In fact, shlib-versions should not use it because that will
|
||
# create a circular dependency as libc-modules.h is generated from
|
||
# shlib-versions.
|
||
module-cppflags = $(if $(filter %.mk.i %.v.i,$(@F)),,$(module-cppflags-real))
|
||
|
||
# These are the variables that the implicit compilation rules use.
|
||
# Note that we can't use -std=* in CPPFLAGS, because it overrides
|
||
# the implicit -lang-asm and breaks cpp behavior for .S files--notably
|
||
# it causes cpp to stop predefining __ASSEMBLER__.
|
||
CPPFLAGS = $(config-extra-cppflags) $(CPPUNDEFS) $(CPPFLAGS-config) \
|
||
$($(subdir)-CPPFLAGS) \
|
||
$(+includes) $(defines) $(module-cppflags) \
|
||
-include $(..)include/libc-symbols.h $(sysdep-CPPFLAGS) \
|
||
$(CPPFLAGS-$(suffix $@)) \
|
||
$(foreach lib,$(libof-$(basename $(@F))) \
|
||
$(libof-$(<F)) $(libof-$(@F)),$(CPPFLAGS-$(lib))) \
|
||
$(CPPFLAGS-$(<F)) $(CPPFLAGS-$(@F)) $(CPPFLAGS-$(basename $(@F)))
|
||
|
||
ifneq (no,$(have-tunables))
|
||
CPPFLAGS += -DTOP_NAMESPACE=glibc
|
||
endif
|
||
|
||
override CFLAGS = -std=gnu11 -fgnu89-inline $(config-extra-cflags) \
|
||
$(filter-out %frame-pointer,$(+cflags)) $(+gccwarn-c) \
|
||
$(+extra-math-flags) $(+extra-time-flags) \
|
||
$(sysdep-CFLAGS) $(CFLAGS-$(suffix $@)) $(CFLAGS-$(<F)) \
|
||
$(CFLAGS-$(@F)) $(tls-model) \
|
||
$(foreach lib,$(libof-$(basename $(@F))) \
|
||
$(libof-$(<F)) $(libof-$(@F)),$(CFLAGS-$(lib)))
|
||
# Use our copies of cstdlib and cmath.
|
||
override CXXFLAGS = -I$(common-objpfx) $(c++-sysincludes) \
|
||
$(filter-out %frame-pointer,$(+cflags)) $(sysdep-CFLAGS) \
|
||
$(CFLAGS-$(suffix $@)) $(CFLAGS-$(<F)) $(CFLAGS-$(@F))
|
||
|
||
# If everything is compiled with -fPIC (implicitly) we must tell this by
|
||
# defining the PIC symbol.
|
||
ifeq (yes,$(build-pic-default))
|
||
pic-default = -DPIC
|
||
endif
|
||
|
||
# Enable object files for different versions of the library.
|
||
# Various things use $(object-suffixes) to know what all to make.
|
||
# The compilation rules use $(CPPFLAGS-${SUFFIX}) and $(CFLAGS-${SUFFIX})
|
||
# to pass different flags for each flavor.
|
||
libtypes = $(foreach o,$(object-suffixes-for-libc),$(libtype$o))
|
||
# .op may be added to all-object-suffixes below.
|
||
all-object-suffixes := .o .os .oS
|
||
object-suffixes :=
|
||
CPPFLAGS-.o = $(pic-default)
|
||
# libc.a must be compiled with -fPIE/-fpie for static PIE.
|
||
CFLAGS-.o = $(filter %frame-pointer,$(+cflags)) $(pie-default)
|
||
libtype.o := lib%.a
|
||
object-suffixes += .o
|
||
ifeq (yes,$(build-shared))
|
||
# Under --enable-shared, we will build a shared library of PIC objects.
|
||
# The PIC object files are named foo.os.
|
||
object-suffixes += .os
|
||
CPPFLAGS-.os = -DPIC -DSHARED
|
||
CFLAGS-.os = $(filter %frame-pointer,$(+cflags)) $(pic-ccflag)
|
||
libtype.os := lib%_pic.a
|
||
# This can be changed by a sysdep makefile
|
||
pic-ccflag = -fPIC
|
||
# This one should always stay like this unless there is a very good reason.
|
||
PIC-ccflag = -fPIC
|
||
endif
|
||
# This can be changed by a sysdep makefile
|
||
pie-ccflag = -fpie
|
||
no-pie-ccflag = -fno-pie
|
||
# This one should always stay like this unless there is a very good reason.
|
||
PIE-ccflag = -fPIE
|
||
ifeq (yes,$(build-profile))
|
||
# Under --enable-profile, we will build a static library of profiled objects.
|
||
# The profiled object files are named foo.op.
|
||
all-object-suffixes += .op
|
||
object-suffixes += .op
|
||
CPPFLAGS-.op = -DPROF $(pic-default)
|
||
# libc_p.a must be compiled with -fPIE/-fpie for static PIE.
|
||
CFLAGS-.op = -pg $(pie-default)
|
||
libtype.op = lib%_p.a
|
||
endif
|
||
|
||
# Convenience variable for when we want to treat shared-library cases
|
||
# differently from the rest.
|
||
object-suffixes-noshared := $(filter-out .os,$(object-suffixes))
|
||
|
||
object-suffixes-for-libc := $(object-suffixes)
|
||
|
||
ifeq (yes,$(build-shared))
|
||
# Build special library that contains the static-only routines for libc.
|
||
object-suffixes-for-libc += .oS
|
||
|
||
# Must build the routines as PIC, though, because they can end up in (users')
|
||
# shared objects. We don't want to use CFLAGS-os because users may, for
|
||
# example, make that processor-specific.
|
||
CFLAGS-.oS = $(CFLAGS-.o) $(PIC-ccflag) $(extra-nonshared-cflags)
|
||
CPPFLAGS-.oS = $(CPPFLAGS-.o) -DPIC -DLIBC_NONSHARED=1
|
||
libtype.oS = lib%_nonshared.a
|
||
endif
|
||
|
||
# The assembler can generate debug information too.
|
||
ifndef ASFLAGS
|
||
ASFLAGS := $(filter -g% -fdebug-prefix-map=%,$(CFLAGS))
|
||
endif
|
||
override ASFLAGS += -Werror=undef $(ASFLAGS-config) $(asflags-cpu)
|
||
|
||
ifndef BUILD_CC
|
||
BUILD_CC = $(CC)
|
||
endif
|
||
|
||
move-if-change = $(SHELL) $(..)scripts/move-if-change
|
||
|
||
-include $(common-objpfx)sysd-sorted
|
||
subdirs = $(sorted-subdirs)
|
||
subdir-srcdirs = $(foreach dir,$(subdirs),\
|
||
$(firstword $($(dir)-srcdir) $(..)$(dir)))
|
||
|
||
# This is a pair of implicit rules to preprocess a file with # comments,
|
||
# %ifdef et al, based on config.h settings or other %include'd files.
|
||
# We use chained rules instead of a pipeline here so that we can properly
|
||
# check the exit status of cpp rather than using its bad output when there
|
||
# is a preprocessing error. Another rule should depend on the output file
|
||
# `FOO.v', and along with that `FOO.v.i' should be given dependencies
|
||
# listing both its input files, and any header files that it may reference
|
||
# (but no commands).
|
||
%.v.i: $(common-objpfx)config.h $(..)Makeconfig
|
||
sed '/^[ ]*%/!s/#.*$$//;/^[ ]*$$/d;s/^[ ]*%/#/' \
|
||
$(filter-out FORCE %.h $(..)Makeconfig,$^) \
|
||
| $(CC) -E -undef $(CPPFLAGS) -x assembler-with-cpp - \
|
||
> $@T
|
||
mv -f $@T $@
|
||
%.v: %.v.i
|
||
sed '/^[ ]*#/d;/^[ ]*$$/d' $< > $@T
|
||
mv -f $@T $@
|
||
|
||
ifeq (yes, $(build-shared))
|
||
|
||
# To generate a header to support more than one ABI for different
|
||
# architecture variants, the CPU/Makefile defines abi-variants to be a
|
||
# list of names for those variants (e.g. 32 64), and, for each variant,
|
||
# defines abi-$(variant)-condition to be the condition for those options
|
||
# to use in a C #if condition. abi-includes may be defined to a list of
|
||
# headers to include in the generated header, if the default does not
|
||
# suffice. default-abi is defined to be the ABI for the current glibc
|
||
# build.
|
||
|
||
ifndef abi-includes
|
||
abi-includes := bits/wordsize.h
|
||
endif
|
||
|
||
# Process the shlib-versions file, which tells us what shared library
|
||
# version numbers to use when we install shared objects on this system.
|
||
# We need to wait until $(subdirs) is complete.
|
||
ifeq ($(sysd-sorted-done),t)
|
||
-include $(common-objpfx)soversions.mk
|
||
ifndef avoid-generated
|
||
$(common-objpfx)shlib-versions.v.i: \
|
||
$(wildcard $(+sysdep_dirs:=/shlib-versions) \
|
||
$(subdir-srcdirs:=/shlib-versions)) \
|
||
$(..)shlib-versions
|
||
|
||
$(common-objpfx)soversions.i: $(..)scripts/soversions.awk \
|
||
$(common-objpfx)shlib-versions.v
|
||
$(AWK) -f $^ > $@T
|
||
mv -f $@T $@
|
||
$(common-objpfx)soversions.mk: $(common-objpfx)soversions.i $(..)Makeconfig
|
||
(while read which lib number setname; do \
|
||
eval seen_$$which=1; \
|
||
test x"$$which" = xDEFAULT || continue; \
|
||
case $$number in \
|
||
[0-9]*) echo "$$lib.so-version=.$$number"; \
|
||
echo "all-sonames+=$$lib=$$lib.so\$$($$lib.so-version)";;\
|
||
*) echo "$$lib.so-version=$$number"; \
|
||
echo "all-sonames+=$$lib=\$$($$lib.so-version)";;\
|
||
esac; \
|
||
done; \
|
||
echo soversions.mk-done = t;) < $< > $@T; exit 0
|
||
mv -f $@T $@
|
||
endif
|
||
endif
|
||
|
||
postclean-generated += soversions.mk soversions.i \
|
||
shlib-versions.v shlib-versions.v.i
|
||
|
||
before-compile += $(common-objpfx)libc-modules.h
|
||
common-generated += libc-modules.h libc-modules.stmp
|
||
ifeq ($(soversions.mk-done),t)
|
||
# Generate a header with macro definitions for use with the IS_IN macro.
|
||
# These are the possible values for the MODULE_NAME macro defined when building
|
||
# sources, to identify which module the translation unit is going to be built
|
||
# into.
|
||
$(common-objpfx)libc-modules.h: $(common-objpfx)libc-modules.stmp; @:
|
||
$(common-objpfx)libc-modules.stmp: $(..)scripts/gen-libc-modules.awk \
|
||
$(common-objpfx)soversions.i
|
||
$(AWK) -v buildlist="$(subst -,_,$(built-modules))" -f $^ > ${@:stmp=T}
|
||
$(move-if-change) ${@:stmp=T} ${@:stmp=h}
|
||
touch $@
|
||
|
||
endif
|
||
|
||
# Build the tunables list header early since it could be used by any module in
|
||
# glibc.
|
||
ifneq (no,$(have-tunables))
|
||
before-compile += $(common-objpfx)dl-tunable-list.h
|
||
common-generated += dl-tunable-list.h dl-tunable-list.stmp
|
||
|
||
$(common-objpfx)dl-tunable-list.h: $(common-objpfx)dl-tunable-list.stmp; @:
|
||
$(common-objpfx)dl-tunable-list.stmp: \
|
||
$(..)scripts/gen-tunables.awk \
|
||
$(..)elf/dl-tunables.list \
|
||
$(wildcard $(subdirs:%=$(..)%/dl-tunables.list)) \
|
||
$(wildcard $(sysdirs:%=%/dl-tunables.list))
|
||
$(AWK) -f $^ > ${@:stmp=T}
|
||
$(move-if-change) ${@:stmp=T} ${@:stmp=h}
|
||
touch $@
|
||
endif
|
||
|
||
# Dump the GCC macros used by the default compiler flags to a header
|
||
# file, so that they can be inspected when using different compiler
|
||
# flags. Add the GCCMACRO prefix to make these macro names unique.
|
||
$(common-objpfx)gcc-macros.h.in: $(common-objpfx)config.status
|
||
$(CC) $(CFLAGS) $(CPPFLAGS) -E -dM -x c -o $@ /dev/null
|
||
$(common-objpfx)gcc-macros.h: $(common-objpfx)gcc-macros.h.in
|
||
sed 's/^#define /#define GCCMACRO/' < $< > $@
|
||
before-compile += $(common-objpfx)gcc-macros.h
|
||
|
||
# Generate version maps, but wait until sysdep-subdirs is known
|
||
ifeq ($(sysd-sorted-done),t)
|
||
ifeq ($(build-shared),yes)
|
||
-include $(common-objpfx)sysd-versions
|
||
-include $(common-objpfx)Versions.mk
|
||
$(addprefix $(common-objpfx),$(version-maps)): $(common-objpfx)sysd-versions
|
||
common-generated += $(version-maps)
|
||
postclean-generated += sysd-versions Versions.all abi-versions.h \
|
||
Versions.def Versions.v.i Versions.v Versions.mk
|
||
|
||
ifndef avoid-generated
|
||
ifneq ($(sysd-versions-subdirs),$(sorted-subdirs) $(config-sysdirs))
|
||
sysd-versions-force = FORCE
|
||
FORCE:
|
||
endif
|
||
|
||
$(common-objpfx)Versions.def: $(..)scripts/versionlist.awk \
|
||
$(common-objpfx)Versions.v
|
||
LC_ALL=C $(AWK) -f $^ > $@T
|
||
mv -f $@T $@
|
||
|
||
$(common-objpfx)Versions.all: $(..)scripts/firstversions.awk \
|
||
$(common-objpfx)soversions.i \
|
||
$(common-objpfx)Versions.def
|
||
{ while read which lib version setname; do \
|
||
test x"$$which" = xDEFAULT || continue; \
|
||
test -z "$$setname" || echo "$$lib : $$setname"; \
|
||
done < $(word 2,$^); \
|
||
cat $(word 3,$^); \
|
||
} | LC_ALL=C $(AWK) -f $< > $@T
|
||
mv -f $@T $@
|
||
$(common-objpfx)Versions.mk: $(..)scripts/haveversions.awk \
|
||
$(common-objpfx)Versions.all
|
||
$(AWK) -f $^ > $@T
|
||
mv -f $@T $@
|
||
# See %.v/%.v.i implicit rules in Makeconfig.
|
||
$(common-objpfx)Versions.v.i: $(wildcard $(subdirs:%=$(..)%/Versions)) \
|
||
$(wildcard $(sysdirs:%=%/Versions)) \
|
||
$(sysd-versions-force)
|
||
$(common-objpfx)sysd-versions: $(common-objpfx)versions.stmp
|
||
$(common-objpfx)versions.stmp: $(common-objpfx)Versions.all \
|
||
$(common-objpfx)Versions.v \
|
||
$(..)scripts/versions.awk
|
||
( echo 'sysd-versions-subdirs = $(subdirs) $(config-sysdirs)' ; \
|
||
cat $(word 2,$^) \
|
||
| LC_ALL=C $(AWK) -v buildroot=$(common-objpfx) -v defsfile=$< \
|
||
-v move_if_change='$(move-if-change)' \
|
||
-f $(word 3,$^); \
|
||
) > $(common-objpfx)sysd-versionsT
|
||
mv -f $(common-objpfx)sysd-versionsT $(common-objpfx)sysd-versions
|
||
touch $@
|
||
endif # avoid-generated
|
||
endif # $(build-shared) = yes
|
||
|
||
-include $(common-objpfx)time64-compat.mk
|
||
postclean-generated += time64-compat.mk
|
||
|
||
$(common-objpfx)time64-compat.mk: $(common-objpfx)time64-compat.mk.i \
|
||
$(sysd-versions-force)
|
||
sed '/^[ ]*#/d;/^[ ]*$$/d' $< > $@T
|
||
mv -f $@T $@
|
||
$(common-objpfx)time64-compat.mk.i: $(..)Makeconfig
|
||
printf "#include <time64-compat.h>\n#ifdef TIME64_NON_DEFAULT\nhave-time64-compat = yes\n#endif" \
|
||
| $(CC) -E -undef $(CPPFLAGS) -x assembler-with-cpp - > $@T
|
||
mv -f $@T $@
|
||
|
||
|
||
endif # sysd-sorted-done
|
||
|
||
# The name under which the run-time dynamic linker is installed.
|
||
# We are currently going for the convention that `/lib/ld.so.1'
|
||
# names the SVR4/ELF ABI-compliant dynamic linker.
|
||
ifndef rtld-installed-name
|
||
ifdef ld.so-version
|
||
rtld-installed-name = $(ld.so-version)
|
||
else
|
||
rtld-installed-name = ld.so.1
|
||
endif
|
||
endif
|
||
|
||
ifndef rtld-version-installed-name
|
||
rtld-version-installed-name = ld-$(version).so
|
||
endif
|
||
|
||
endif # build-shared
|
||
|
||
|
||
ifeq ($(build-shared),yes)
|
||
libm = $(common-objpfx)math/libm.so$(libm.so-version)
|
||
libmvec = $(common-objpfx)mathvec/libmvec.so$(libmvec.so-version)
|
||
else
|
||
libm = $(common-objpfx)math/libm.a
|
||
libmvec = $(common-objpfx)mathvec/libmvec.a
|
||
endif
|
||
|
||
ifeq ($(build-shared),yes)
|
||
libsupport = $(common-objpfx)support/libsupport_nonshared.a
|
||
else
|
||
libsupport = $(common-objpfx)support/libsupport.a
|
||
endif
|
||
|
||
# This is a partial list of subdirectories containing the library source.
|
||
# The order is more or less arbitrary. The sorting step will take care of the
|
||
# dependencies and generate sorted-subdirs dynamically.
|
||
all-subdirs = csu assert ctype locale intl catgets math setjmp signal \
|
||
stdlib stdio-common libio malloc string wcsmbs time dirent \
|
||
grp pwd posix io termios resource misc socket sysvipc gmon \
|
||
gnulib iconv iconvdata wctype manual shadow gshadow po argp \
|
||
localedata timezone rt conform debug mathvec support \
|
||
dlfcn elf
|
||
|
||
ifeq ($(build-crypt),yes)
|
||
all-subdirs += crypt
|
||
rpath-dirs += crypt
|
||
endif
|
||
|
||
ifndef avoid-generated
|
||
# sysd-sorted itself will contain rules making the sysd-sorted target
|
||
# depend on Depend files. But if you just added a Depend file to an
|
||
# existing directory not in all-subdirs, then sysd-sorted needs to
|
||
# be regenerated, so it depends on existing $(sorted-subdirs:=/Depend) files.
|
||
all-Depend-files := $(wildcard $(sort \
|
||
$(foreach dir,$(all-subdirs),\
|
||
$(firstword $($(dir)-srcdir) \
|
||
$(..)$(dir))/Depend) \
|
||
$(sorted-subdirs:=/Depend)))
|
||
$(common-objpfx)sysd-sorted: $(..)scripts/gen-sorted.awk \
|
||
$(common-objpfx)config.make $(..)Makeconfig \
|
||
$(wildcard $(sysdirs:=/Subdirs)) \
|
||
$(all-Depend-files)
|
||
$(AWK) -f $< \
|
||
-v subdirs='$(all-subdirs)' \
|
||
-v srcpfx='$(..)' \
|
||
$(filter %/Subdirs %/Depend,$^) > $@-tmp
|
||
mv -f $@-tmp $@
|
||
$(all-Depend-files): ;
|
||
endif
|
||
|
||
# This gives partial TARGET:SOURCE pattern pairs to have rules
|
||
# emitted into sysd-rules. A sysdeps Makeconfig fragment can
|
||
# add its own special object file prefix to this list with e.g. foo-%:%
|
||
# to have foo-*.? compiled from *.? using $(foo-CPPFLAGS).
|
||
sysd-rules-patterns := %:% rtld-%:rtld-% rtld-%:% m_%:s_%
|
||
|
||
# Let sysdeps/ subdirs contain a Makeconfig fragment for us to include here.
|
||
sysdep-makeconfigs := $(wildcard $(+sysdep_dirs:=/Makeconfig))
|
||
ifneq (,$(sysdep-makeconfigs))
|
||
include $(sysdep-makeconfigs)
|
||
endif
|
||
|
||
# Compute just the target patterns. Makeconfig has set sysd-rules-patterns.
|
||
sysd-rules-targets := $(sort $(foreach p,$(sysd-rules-patterns),\
|
||
$(firstword $(subst :, ,$p))))
|
||
|
||
# $(libpthread-routines-var) and $(librt-routines-var) are the make
|
||
# variable to which pthread routines need to be added to land in the
|
||
# right library.
|
||
ifeq ($(pthread-in-libc),yes)
|
||
libpthread-routines-var = routines
|
||
librt-routines-var = routines
|
||
libanl-routines-var = routines
|
||
else
|
||
libpthread-routines-var = libpthread-routines
|
||
librt-routines-var = librt-routines
|
||
libanl-routines-var = libanl-routines
|
||
endif
|
||
|
||
# A sysdeps Makeconfig fragment may set libc-reentrant to yes.
|
||
ifeq (yes,$(libc-reentrant))
|
||
defines += -D_LIBC_REENTRANT
|
||
|
||
libio-mtsafe = -D_IO_MTSAFE_IO
|
||
endif
|
||
|
||
# The name to give to a test in test results summaries.
|
||
test-name = $(strip $(patsubst %.out, %, $(patsubst $(common-objpfx)%, %, $@)))
|
||
|
||
# Likewise, in XFAIL variable names.
|
||
test-xfail-name = $(strip $(patsubst %.out, %, $(patsubst $(objpfx)%, %, $@)))
|
||
|
||
# Command to output a test status line (such as PASS: test-name). If
|
||
# test-xfail-$(test-xfail-name) has a nonempty value, the status will be
|
||
# XPASS or XFAIL rather than PASS or FAIL.
|
||
evaluate-test = $(..)scripts/evaluate-test.sh $(test-name) $$? \
|
||
$(if $(test-xfail-$(test-xfail-name)),true,false) \
|
||
$(if $(stop-on-test-failure),true,false) \
|
||
> $(common-objpfx)$(test-name).test-result
|
||
|
||
endif # Makeconfig not yet included
|
||
|
||
# Local Variables:
|
||
# mode: makefile
|
||
# End:
|