mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-23 05:20:06 +00:00
2ef4271688
Commit 1294b1892e ("Add support for sqrt asm redirects") added the
-fno-math-errno flag to build most of the glibc in order to enable GCC
to inline math functions. Due to GCC bug #88576, saving and restoring
errno around calls to malloc are optimized-out. In turn this causes
strerror to set errno to ENOMEM if it get passed an invalid error number
and if malloc sets errno to ENOMEM (which might happen even if it
succeeds). This is not allowed by POSIX.
This patch changes the build flags, building only libm with
-fno-math-errno and all the remaining code with -fno-math-errno. This
should be safe as libm doesn't contain any code saving and restoring
errno around malloc. This patch can probably be reverted once the GCC
bug is fixed and available in stable releases.
Tested on x86-64, no regression in the testsuite.
Changelog:
[BZ #24024]
* Makeconfig: Build libm with -fno-math-errno but build the remaining
code with -fmath-errno.
* string/Makefile [$(build-shared)] (tests): Add test-strerror-errno.
[$(build-shared)] (LDLIBS-test-strerror-errno): New variable.
* string/test-strerror-errno.c: New file.
1334 lines
47 KiB
Plaintext
1334 lines
47 KiB
Plaintext
# Copyright (C) 1991-2019 Free Software Foundation, Inc.
|
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# This file is part of the GNU C Library.
|
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|
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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
|
||
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||
# Lesser General Public License for more details.
|
||
|
||
# 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
|
||
# <http://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.
|
||
endif
|
||
|
||
all: # Make this the default goal
|
||
|
||
ifneq "$(origin +included-Makeconfig)" "file"
|
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|
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+included-Makeconfig := yes
|
||
|
||
ifdef subdir
|
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.. := ../
|
||
endif
|
||
|
||
# $(common-objdir) is the place to put objects and
|
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# such that are not specific to a single subdir.
|
||
ifdef objdir
|
||
objpfx := $(patsubst %//,%/,$(objdir)/$(subdir)/)
|
||
common-objpfx = $(objdir)/
|
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common-objdir = $(objdir)
|
||
else
|
||
objdir must be defined by the build-directory Makefile.
|
||
endif
|
||
|
||
# Root of the sysdeps tree.
|
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sysdep_dir := $(..)sysdeps
|
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export sysdep_dir := $(sysdep_dir)
|
||
|
||
# Get the values defined by options to `configure'.
|
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include $(common-objpfx)config.make
|
||
|
||
# What flags to give to sources which call user provided callbacks
|
||
uses-callbacks = -fexceptions
|
||
|
||
# What flags to give to tests which test stack alignment
|
||
stack-align-test-flags =
|
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|
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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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|
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+sysdep_dirs = $(sysdirs)
|
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ifdef objdir
|
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+sysdep_dirs := $(objdir) $(+sysdep_dirs)
|
||
endif
|
||
|
||
# Run config.status to update config.make and config.h. We don't show the
|
||
# dependence of config.h to Make, because it is only touched when it
|
||
# changes and so config.status would be run every time; the dependence of
|
||
# config.make should suffice to force regeneration and re-exec, and the new
|
||
# image will notice if config.h changed.
|
||
$(common-objpfx)config.make: $(common-objpfx)config.status \
|
||
$(..)config.make.in $(..)config.h.in
|
||
cd $(<D); $(SHELL) $(<F)
|
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|
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# Find all the sysdeps configure fragments, to make sure we re-run
|
||
# configure when any of them changes.
|
||
$(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) $(@F) --recheck; else \
|
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echo The GNU C library has not been configured. >&2; \
|
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echo Run \`configure\' to configure it before building. >&2; \
|
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echo Try \`configure --help\' for more details. >&2; \
|
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exit 1; fi
|
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|
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# We don't want CPPFLAGS to be exported to the command running configure.
|
||
unexport CPPFLAGS
|
||
|
||
# Get the user's configuration parameters.
|
||
ifneq ($(wildcard $(..)configparms),)
|
||
include $(..)configparms
|
||
endif
|
||
ifneq ($(objpfx),)
|
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ifneq ($(wildcard $(common-objpfx)configparms),)
|
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include $(common-objpfx)configparms
|
||
endif
|
||
endif
|
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|
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####
|
||
#### These are the configuration variables. You can define values for
|
||
#### the variables below in the file `configparms'.
|
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#### Do NOT edit this file.
|
||
####
|
||
|
||
|
||
# Common prefix for machine-independent installation directories.
|
||
ifeq ($(origin prefix),undefined) # ifndef would override explicit empty value.
|
||
prefix = /usr/local
|
||
endif
|
||
|
||
# Decide whether we shall build the programs or not. We always do this
|
||
# 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 ($(config-os),none)
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build-programs=yes
|
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else
|
||
build-programs=no
|
||
endif
|
||
endif
|
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|
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# Common prefix for machine-dependent installation directories.
|
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ifeq ($(origin exec_prefix),undefined)
|
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exec_prefix = $(prefix)
|
||
endif
|
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|
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# Where to install the library and object files.
|
||
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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|
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# Where to install the shared library.
|
||
ifndef slibdir
|
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slibdir = $(exec_prefix)/lib
|
||
endif
|
||
inst_slibdir = $(install_root)$(slibdir)
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||
|
||
# Where to install the dynamic linker.
|
||
ifndef rtlddir
|
||
rtlddir = $(slibdir)
|
||
endif
|
||
inst_rtlddir = $(install_root)$(rtlddir)
|
||
|
||
# Prefix to put on files installed in $(libdir). For libraries `libNAME.a',
|
||
# the prefix is spliced between `lib' and the name, so the linker switch
|
||
# `-l$(libprefix)NAME' finds the library; for other files the prefix is
|
||
# just prepended to the whole file name.
|
||
ifeq ($(origin libprefix),undefined)
|
||
libprefix =
|
||
endif
|
||
|
||
# Where to install the header files.
|
||
ifndef includedir
|
||
includedir = $(prefix)/include
|
||
endif
|
||
inst_includedir = $(install_root)$(includedir)
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|
||
# Where to install machine-independent data files.
|
||
# These are the timezone database, and the locale database.
|
||
ifndef datadir
|
||
datadir = $(prefix)/share
|
||
endif
|
||
inst_datadir = $(install_root)$(datadir)
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|
||
# Where to install the timezone data files (which are machine-independent).
|
||
ifndef zonedir
|
||
zonedir = $(datadir)/zoneinfo
|
||
endif
|
||
inst_zonedir = $(install_root)$(zonedir)
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||
|
||
# Where to install the compiled binary locale archive and compiled
|
||
# binary locale files.
|
||
ifndef complocaledir
|
||
complocaledir = $(libdir)/locale
|
||
endif
|
||
inst_complocaledir = $(install_root)$(complocaledir)
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||
|
||
# Where to install the message catalog data files (which are
|
||
# machine-independent).
|
||
ifndef localedir
|
||
localedir = $(datadir)/locale
|
||
endif
|
||
inst_localedir = $(install_root)$(localedir)
|
||
|
||
# Where to install the locale charmap source files.
|
||
ifndef i18ndir
|
||
i18ndir = $(datadir)/i18n
|
||
endif
|
||
inst_i18ndir = $(install_root)$(i18ndir)
|
||
|
||
# Where to install the shared object for charset transformation.
|
||
ifndef gconvdir
|
||
gconvdir = $(libdir)/gconv
|
||
endif
|
||
inst_gconvdir = $(install_root)$(gconvdir)
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||
|
||
# Where to install programs.
|
||
ifndef bindir
|
||
bindir = $(exec_prefix)/bin
|
||
endif
|
||
inst_bindir = $(install_root)$(bindir)
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||
|
||
# Where to install internal programs.
|
||
ifndef libexecdir
|
||
libexecdir = $(exec_prefix)/libexec
|
||
endif
|
||
inst_libexecdir = $(install_root)$(libexecdir)
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||
|
||
# Where to install administrative programs.
|
||
ifndef rootsbindir
|
||
rootsbindir = $(exec_prefix)/sbin
|
||
endif
|
||
inst_rootsbindir = $(install_root)$(rootsbindir)
|
||
|
||
ifndef sbindir
|
||
sbindir = $(exec_prefix)/sbin
|
||
endif
|
||
inst_sbindir = $(install_root)$(sbindir)
|
||
|
||
# Where to install the Info files.
|
||
ifndef infodir
|
||
infodir = $(prefix)/info
|
||
endif
|
||
inst_infodir = $(install_root)$(infodir)
|
||
|
||
# Where to install audit libraries.
|
||
ifndef auditdir
|
||
auditdir = $(libdir)/audit
|
||
endif
|
||
inst_auditdir = $(install_root)$(auditdir)
|
||
|
||
# Where to install default configuration files. These include the local
|
||
# timezone specification and network data base files.
|
||
ifndef sysconfdir
|
||
sysconfdir = $(prefix)/etc
|
||
endif
|
||
inst_sysconfdir = $(install_root)$(sysconfdir)
|
||
|
||
# Directory for the database files and Makefile for nss_db.
|
||
ifndef vardbdir
|
||
vardbdir = $(localstatedir)/db
|
||
endif
|
||
inst_vardbdir = $(install_root)$(vardbdir)
|
||
|
||
# Where to install the "localtime" timezone file; this is the file whose
|
||
# contents $(localtime) specifies. If this is a relative pathname, it is
|
||
# relative to $(zonedir). It is a good idea to put this somewhere
|
||
# other than there, so the zoneinfo directory contains only universal data,
|
||
# localizing the configuration data elsewhere.
|
||
ifndef localtime-file
|
||
localtime-file = $(sysconfdir)/localtime
|
||
endif
|
||
|
||
# What to use for leap second specifications in compiling the default
|
||
# 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.
|
||
# Both zone flavors are always available as `posix/ZONE' and `right/ZONE'.
|
||
# This variable determines the default: if it's `/dev/null',
|
||
# ZONE==posix/ZONE; if it's `leapseconds', ZONE==right/ZONE.
|
||
ifndef leapseconds
|
||
leapseconds = /dev/null
|
||
endif
|
||
|
||
# What timezone's DST rules should be used when a POSIX-style TZ
|
||
# 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.
|
||
# Run `make -C time echo-zonenames' to see a list of available zone names.
|
||
# This setting can be changed with `zic -p TIMEZONE' at any time.
|
||
# If you want POSIX.1 compatibility, use `America/New_York'.
|
||
ifndef posixrules
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||
posixrules = America/New_York
|
||
endif
|
||
|
||
# Where to install the "posixrules" timezone file; this is file
|
||
# whose contents $(posixrules) specifies. If this is a relative
|
||
# pathname, it is relative to $(zonedir).
|
||
ifndef posixrules-file
|
||
posixrules-file = posixrules
|
||
endif
|
||
|
||
|
||
# Directory where your system's native header files live.
|
||
# This is used on Unix systems to generate some GNU libc header files.
|
||
ifndef sysincludedir
|
||
sysincludedir = /usr/include
|
||
endif
|
||
|
||
|
||
# Commands to install files.
|
||
ifndef INSTALL_DATA
|
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INSTALL_DATA = $(INSTALL) -m 644
|
||
endif
|
||
ifndef INSTALL_SCRIPT
|
||
INSTALL_SCRIPT = $(INSTALL)
|
||
endif
|
||
ifndef INSTALL_PROGRAM
|
||
INSTALL_PROGRAM = $(INSTALL)
|
||
endif
|
||
ifndef INSTALL
|
||
INSTALL = install
|
||
endif
|
||
|
||
|
||
# The name of the C compiler.
|
||
# If you've got GCC, and it works, use it.
|
||
ifeq ($(origin CC),default)
|
||
CC := gcc
|
||
endif
|
||
|
||
# The name of the C compiler to use for compilations of programs to run on
|
||
# the host that is building the library. If you set CC to a
|
||
# cross-compiler, you must set this to the normal compiler.
|
||
ifndef BUILD_CC
|
||
BUILD_CC = $(CC)
|
||
endif
|
||
|
||
# Default flags to pass the C compiler.
|
||
ifndef default_cflags
|
||
ifeq ($(release),stable)
|
||
default_cflags := -g -O2
|
||
else
|
||
default_cflags := -g -O
|
||
endif
|
||
endif
|
||
|
||
# Flags to pass the C compiler when assembling preprocessed assembly code
|
||
# (`.S' files).
|
||
ifndef asm-CPPFLAGS
|
||
asm-CPPFLAGS =
|
||
endif
|
||
|
||
as-needed := -Wl,--as-needed
|
||
no-as-needed := -Wl,--no-as-needed
|
||
|
||
# Must be supported by the linker.
|
||
no-whole-archive = -Wl,--no-whole-archive
|
||
whole-archive = -Wl,--whole-archive
|
||
|
||
# Installed name of the startup code.
|
||
# The ELF convention is that the startfile is called crt1.o
|
||
start-installed-name = crt1.o
|
||
# On systems that do not need a special startfile for statically linked
|
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# binaries, simply set it to the normal name.
|
||
ifndef static-start-installed-name
|
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static-start-installed-name = $(start-installed-name)
|
||
endif
|
||
|
||
ifeq (yes,$(enable-static-pie))
|
||
# Link with rcrt1.o, instead of crt1.o, to call _dl_relocate_static_pie
|
||
# to relocate static PIE.
|
||
real-static-start-installed-name = r$(static-start-installed-name)
|
||
else
|
||
real-static-start-installed-name = $(static-start-installed-name)
|
||
endif
|
||
|
||
ifeq (yesyes,$(build-shared)$(have-z-combreloc))
|
||
combreloc-LDFLAGS = -Wl,-z,combreloc
|
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LDFLAGS.so += $(combreloc-LDFLAGS)
|
||
LDFLAGS-rtld += $(combreloc-LDFLAGS)
|
||
endif
|
||
|
||
relro-LDFLAGS = -Wl,-z,relro
|
||
LDFLAGS.so += $(relro-LDFLAGS)
|
||
LDFLAGS-rtld += $(relro-LDFLAGS)
|
||
|
||
ifeq (yes,$(have-hash-style))
|
||
# For the time being we unconditionally use 'both'. At some time we
|
||
# should declare statically linked code as 'out of luck' and compile
|
||
# with --hash-style=gnu only.
|
||
hashstyle-LDFLAGS = -Wl,--hash-style=both
|
||
LDFLAGS.so += $(hashstyle-LDFLAGS)
|
||
LDFLAGS-rtld += $(hashstyle-LDFLAGS)
|
||
endif
|
||
|
||
ifeq (yes,$(enable-static-pie))
|
||
pic-default = -DPIC
|
||
# Compile libc.a and libc_p.a with -fPIE/-fpie for static PIE.
|
||
pie-default = $(pie-ccflag)
|
||
ifeq (yes,$(have-static-pie))
|
||
default-pie-ldflag = -static-pie
|
||
else
|
||
# Static PIE can't have dynamic relocations in read-only segments since
|
||
# static PIE is mapped into memory by kernel. --eh-frame-hdr is needed
|
||
# for PIE to support exception.
|
||
default-pie-ldflag = -Wl,-pie,--no-dynamic-linker,--eh-frame-hdr,-z,text
|
||
endif
|
||
endif
|
||
|
||
# If lazy relocations are disabled, add the -z now flag. Use
|
||
# LDFLAGS-lib.so instead of LDFLAGS.so, to avoid adding the flag to
|
||
# test modules.
|
||
ifeq ($(bind-now),yes)
|
||
LDFLAGS-lib.so += -Wl,-z,now
|
||
endif
|
||
|
||
# Command to run after every final link (executable or shared object).
|
||
# This is invoked with $(call after-link,...), so it should operate on
|
||
# the file $1. This can be set to do some sort of post-processing on
|
||
# binaries, or to perform some sort of static sanity check.
|
||
ifndef after-link
|
||
after-link =
|
||
endif
|
||
|
||
# Additional libraries to link into every test.
|
||
link-extra-libs-tests = $(libsupport)
|
||
|
||
# Command for linking PIE programs with the C library.
|
||
ifndef +link-pie
|
||
+link-pie-before-libc = $(CC) $(if $($(@F)-no-pie),$(no-pie-ldflag),-pie) \
|
||
-Wl,-O1 -nostdlib -nostartfiles -o $@ \
|
||
$(sysdep-LDFLAGS) $(LDFLAGS) $(LDFLAGS-$(@F)) \
|
||
$(combreloc-LDFLAGS) $(relro-LDFLAGS) $(hashstyle-LDFLAGS) \
|
||
$(firstword $(CRT-$(@F)) $(csu-objpfx)S$(start-installed-name)) \
|
||
$(+preinit) $(+prectorS) \
|
||
$(filter-out $(addprefix $(csu-objpfx),start.o \
|
||
S$(start-installed-name))\
|
||
$(+preinit) $(link-extra-libs) \
|
||
$(common-objpfx)libc% $(+postinit),$^) \
|
||
$(link-extra-libs)
|
||
+link-pie-after-libc = $(+postctorS) $(+postinit)
|
||
define +link-pie
|
||
$(+link-pie-before-libc) $(rtld-LDFLAGS) $(link-libc) $(+link-pie-after-libc)
|
||
$(call after-link,$@)
|
||
endef
|
||
define +link-pie-tests
|
||
$(+link-pie-before-libc) $(rtld-tests-LDFLAGS) $(link-libc-tests) \
|
||
$(+link-pie-after-libc)
|
||
$(call after-link,$@)
|
||
endef
|
||
define +link-pie-printers-tests
|
||
$(+link-pie-before-libc) $(built-rtld-LDFLAGS) $(link-libc-printers-tests) \
|
||
$(+link-pie-after-libc)
|
||
$(call after-link,$@)
|
||
endef
|
||
endif
|
||
# Command for statically linking programs with the C library.
|
||
ifndef +link-static
|
||
+link-static-before-libc = $(CC) -nostdlib -nostartfiles -static -o $@ \
|
||
$(if $($(@F)-no-pie),$(no-pie-ldflag),$(default-pie-ldflag)) \
|
||
$(sysdep-LDFLAGS) $(LDFLAGS) $(LDFLAGS-$(@F)) \
|
||
$(firstword $(CRT-$(@F)) $(csu-objpfx)$(real-static-start-installed-name)) \
|
||
$(+preinit) $(+prectorT) \
|
||
$(filter-out $(addprefix $(csu-objpfx),start.o \
|
||
$(start-installed-name))\
|
||
$(+preinit) $(link-extra-libs-static) \
|
||
$(common-objpfx)libc% $(+postinit),$^) \
|
||
$(link-extra-libs-static)
|
||
+link-static-after-libc = $(+postctorT) $(+postinit)
|
||
define +link-static
|
||
$(+link-static-before-libc) $(link-libc-static) $(+link-static-after-libc)
|
||
$(call after-link,$@)
|
||
endef
|
||
define +link-static-tests
|
||
$(+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-printers-tests = $(+link-pie-printers-tests)
|
||
else # not build-pie-default
|
||
+link-before-libc = $(CC) -nostdlib -nostartfiles -o $@ \
|
||
$(sysdep-LDFLAGS) $(LDFLAGS) $(LDFLAGS-$(@F)) \
|
||
$(combreloc-LDFLAGS) $(relro-LDFLAGS) $(hashstyle-LDFLAGS) \
|
||
$(firstword $(CRT-$(@F)) $(csu-objpfx)$(start-installed-name)) \
|
||
$(+preinit) $(+prector) \
|
||
$(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
|
||
$(+link-before-libc) $(rtld-LDFLAGS) $(link-libc) $(+link-after-libc)
|
||
$(call after-link,$@)
|
||
endef
|
||
define +link-tests
|
||
$(+link-before-libc) $(rtld-tests-LDFLAGS) $(link-libc-tests) \
|
||
$(+link-after-libc)
|
||
$(call after-link,$@)
|
||
endef
|
||
define +link-printers-tests
|
||
$(+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-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=$(rpath-link)
|
||
|
||
ifeq (yes,$(build-hardcoded-path-in-tests))
|
||
link-libc-tests-rpath-link = $(link-libc-rpath)
|
||
else
|
||
link-libc-tests-rpath-link = $(link-libc-rpath-link)
|
||
endif # build-hardcoded-path-in-tests
|
||
|
||
link-libc-before-gnulib = $(common-objpfx)libc.so$(libc.so-version) \
|
||
$(common-objpfx)$(patsubst %,$(libtype.oS),c) \
|
||
$(as-needed) $(elf-objpfx)ld.so \
|
||
$(no-as-needed)
|
||
link-libc = $(link-libc-rpath-link) $(link-libc-before-gnulib) $(gnulib)
|
||
|
||
link-libc-tests-after-rpath-link = $(link-libc-before-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)
|
||
|
||
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)
|
||
|
||
# We might want to compile with some stack-protection flag.
|
||
ifneq ($(stack-protector),)
|
||
+stack-protector=$(stack-protector)
|
||
endif
|
||
|
||
# This is the program that generates makefile dependencies from C source files.
|
||
# The -MP flag tells GCC >= 3.2 (which we now require) to produce dummy
|
||
# targets for headers so that removed headers don't break the build.
|
||
ifndef +mkdep
|
||
+mkdep = $(CC) -M -MP
|
||
endif
|
||
|
||
# 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) == ""
|
||
|
||
+cflags += $(cflags-cpu) $(+gccwarn) $(+merge-constants) $(+math-flags) \
|
||
$(+stack-protector)
|
||
+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
|
||
|
||
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 %.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) \
|
||
$(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
|
||
# 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 $@
|
||
endif
|
||
|
||
# Generate version maps, but wait until sysdep-subdirs is known
|
||
ifeq ($(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
|
||
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)
|
||
libdl = $(common-objpfx)dlfcn/libdl.so$(libdl.so-version)
|
||
else
|
||
libdl = $(common-objpfx)dlfcn/libdl.a
|
||
endif
|
||
|
||
ifeq ($(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 = $(common-objpfx)support/libsupport.a
|
||
endif
|
||
|
||
# These are the subdirectories containing the library source. The order
|
||
# is more or less arbitrary. The sorting step will take care of the
|
||
# dependencies.
|
||
all-subdirs = csu assert ctype locale intl catgets math setjmp signal \
|
||
stdlib stdio-common libio malloc string wcsmbs time dirent \
|
||
grp pwd posix io termios resource misc socket sysvipc gmon \
|
||
gnulib iconv iconvdata wctype manual shadow gshadow po argp \
|
||
localedata timezone rt conform debug mathvec support \
|
||
dlfcn elf
|
||
|
||
ifeq ($(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))))
|
||
|
||
# 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:
|