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glibc/Makerules
Florian Weimer db3476aff1 libio: Implement vtable verification [BZ #20191] 
This commit puts all libio vtables in a dedicated, read-only ELF
section, so that they are consecutive in memory.  Before any indirect
jump, the vtable pointer is checked against the section boundaries,
and the process is terminated if the vtable pointer does not fall into
the special ELF section.

To enable backwards compatibility, a special flag variable
(_IO_accept_foreign_vtables), protected by the pointer guard, avoids
process termination if libio stream object constructor functions have
been called earlier.  Such constructor functions are called by the GCC
2.95 libstdc++ library, and this mechanism ensures compatibility with
old binaries.  Existing callers inside glibc of these functions are
adjusted to call the original functions, not the wrappers which enable
vtable compatiblity.

The compatibility mechanism is used to enable passing FILE * objects
across a static dlopen boundary, too.
2016-06-23 20:01:52 +02:00

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# Copyright (C) 1991-2016 Free Software Foundation, Inc.
# This file is part of the GNU C Library.
# The GNU C Library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
# The GNU C Library is distributed in the hope that it will be useful,
# 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
# License along with the GNU C Library; if not, see
# <http://www.gnu.org/licenses/>.
#
# Common rules for making the GNU C library. This file is included
# by the top-level Makefile and by all subdirectory makefiles
# (through Rules).
#
ifneq (,)
This makefile requires GNU Make.
endif
REQUIRED_MAKE_VERSION = 3.74
REAL_MAKE_VERSION = $(firstword $(MAKE_VERSION))
ifneq ($(REQUIRED_MAKE_VERSION), \
$(firstword $(sort $(REAL_MAKE_VERSION) $(REQUIRED_MAKE_VERSION))))
Wrong GNU Make version. See above for the version needed.
endif
ifdef subdir
.. := ../
endif # subdir
# If `sources' was defined by the parent makefile, undefine it so
# we will later get it from wildcard search in this directory.
ifneq "$(findstring env,$(origin sources))" ""
sources :=
endif
oPATH := $(PATH)
PATH := this definition should take precedence over $(oPATH)
ifeq ($(PATH),$(oPATH))
You must not use the -e flag when building the GNU C library.
else
PATH := $(oPATH)
endif
ifndef +included-Makeconfig
include $(..)Makeconfig
endif
# This variable is used in ``include $(o-iterator)'' after defining
# $(o-iterator-doit) to produce some desired rule using $o for the object
# suffix, and setting $(object-suffixes-left) to $(object-suffixes); a copy
# is produced for each object suffix in use.
o-iterator = $(patsubst %,$(..)o-iterator.mk,$(object-suffixes-left))
# Include any system-specific makefiles.
# This is here so things in sysdep Makefiles can easily depend on foo.h as
# appropriate and not worry about where foo.h comes from, which may be
# system dependent and not known by that Makefile.
vpath %.h $(subst $(empty) ,:,$(strip $(common-objpfx) $(objpfx) \
$(+sysdep_dirs) $(..)))
# The same is true for RPC source files.
vpath %.x $(subst $(empty) ,:,$(strip $(common-objpfx) $(objpfx) \
$(+sysdep_dirs) $(..)))
# Some sysdep makefiles use this to distinguish being included here from
# being included individually by a subdir makefile (hurd/Makefile needs this).
in-Makerules := yes
sysdep-makefiles := $(wildcard $(sysdirs:=/Makefile))
ifneq (,$(sysdep-makefiles))
include $(sysdep-makefiles)
endif
# Reorder before-compile so that mach things come first, and hurd things
# second, before all else. The mach and hurd subdirectories have many
# generated header files which the much of rest of the library depends on,
# so it is best to build them first (and mach before hurd, at that).
before-compile := $(filter $(common-objpfx)mach% $(common-objpfx)hurd%,\
$(before-compile)) \
$(filter-out $(common-objpfx)mach% $(common-objpfx)hurd%,\
$(before-compile))
# Even before that, we need abi-versions.h which is generated right here.
ifeq ($(build-shared),yes)
ifndef avoid-generated
before-compile := $(common-objpfx)abi-versions.h $(before-compile)
$(common-objpfx)abi-versions.h: $(..)scripts/abi-versions.awk \
$(common-objpfx)Versions.all
LC_ALL=C $(AWK) -f $^ > $@T
mv -f $@T $@
$(common-objpfx)%.latest: $(common-objpfx)abi-versions.h
sed -n '/ VERSION_$*_/{s/^.*_\([A-Z0-9_]*\).*$$/\1/;h;};$${g;p;}' \
$(common-objpfx)abi-versions.h > $@T
mv -f $@T $@
endif # avoid-generated
endif # $(build-shared) = yes
ifndef avoid-generated
before-compile := $(common-objpfx)libc-abis.h $(before-compile)
$(common-objpfx)libc-abis.h: $(common-objpfx)libc-abis.stamp; @:
$(common-objpfx)libc-abis.stamp: $(..)scripts/gen-libc-abis \
$(firstword $(wildcard $(sysdirs:=/libc-abis)) \
$(..)libc-abis) \
$(..)Makerules
$(SHELL) $< \
$(base-machine)-$(config-vendor)-$(config-os) \
< $(word 2,$^) > $(@:.stamp=.h)T
$(move-if-change) $(@:.stamp=.h)T $(@:.stamp=.h)
touch $@
common-generated += $(common-objpfx)libc-abis.h
endif # avoid-generated
ifeq (yes,$(build-shared))
$(common-objpfx)runtime-linker.h: $(common-objpfx)runtime-linker.stamp; @:
$(common-objpfx)runtime-linker.stamp: $(common-objpfx)config.make
$(make-target-directory)
echo '#define RUNTIME_LINKER "$(rtlddir)/$(rtld-installed-name)"' \
> ${@:stamp=T}
$(move-if-change) ${@:stamp=T} ${@:stamp=h}
touch $@
endif
# Make sure the subdirectory for object files gets created.
ifdef objpfx
ifeq (,$(wildcard $(objpfx).))
before-compile += $(objpfx).
$(objpfx).:
$(make-target-directory)
endif
endif
# Remove existing files from `before-compile'. Things are added there when
# they must exist for dependency generation to work right, but once they
# exist there is no further need for every single file to depend on them,
# and those gratuitous dependencies result in many gratuitous
# recompilations.
before-compile := $(filter-out $(wildcard $(before-compile)),$(before-compile))
# Don't let any before-compile file be an intermediate and get removed.
ifdef before-compile
$(before-compile):
endif
# We don't want $(common-objpfx) files to depend on miscellaneous stuff
# in subdirs.
ifdef subdir
common-before-compile := $(filter-out $(objpfx)%,$(before-compile))
else
common-before-compile = $(before-compile)
endif
ifndef subdir
# If a makefile needs to do something conditional on something that
# can only be figured out from headers, write a FOO.make.c input
# file that uses cpp contructs and contains @@@ LINE @@@ for each LINE
# to emit in the generated makefile, and use -include $(common-objpfx)FOO.make.
#
# We only generate these in the top-level makefile, to avoid any weirdness
# from subdir-specific makefile tweaks creeping in on an update.
$(common-objpfx)%.make: $(..)%.make.c $(..)Makerules $(common-before-compile)
rm -f $@T $@.dT
(echo '# Generated from $*.make.c by Makerules.'; \
$(CC) $(CFLAGS) $(CPPFLAGS) -E -DASSEMBLER $< \
-MD -MP -MT '$$(common-objpfx)$*.make' -MF $@.dT \
| sed -n '/@@@/{s/@@@[ ]*\(.*\)@@@/\1/;s/[ ]*$$//p;}'; \
echo 'common-generated += $(@F)'; \
sed $(sed-remove-objpfx) $(sed-remove-dotdot) $@.dT; \
rm -f $@.dT) > $@T
mv -f $@T $@
endif
ifdef subdir
sed-remove-dotdot := -e 's@ *\.\.\/\([^ \]*\)@ $$(..)\1@g' \
-e 's@^\.\.\/\([^ \]*\)@$$(..)\1@g'
else
sed-remove-dotdot := -e 's@ *\([^ \/$$][^ \]*\)@ $$(..)\1@g' \
-e 's@^\([^ \/$$][^ \]*\)@$$(..)\1@g'
endif
ifdef gen-as-const-headers
# Generating headers for assembly constants.
# We need this defined early to get into before-compile before
# it's used in sysd-rules, below.
$(common-objpfx)%.h $(common-objpfx)%.h.d: $(..)scripts/gen-as-const.awk \
%.sym $(common-before-compile)
$(AWK) -f $< $(filter %.sym,$^) \
| $(CC) -S -o $(@:.h.d=.h)T3 $(CFLAGS) $(CPPFLAGS) -x c - \
-MD -MP -MF $(@:.h=.h.d)T -MT '$(@:.h=.h.d) $(@:.h.d=.h)'
sed -n 's/^.*@@@name@@@\([^@]*\)@@@value@@@[^0-9Xxa-fA-F-]*\([0-9Xxa-fA-F-][0-9Xxa-fA-F-]*\).*@@@end@@@.*$$/#define \1 \2/p' \
$(@:.h.d=.h)T3 > $(@:.h.d=.h)T
rm -f $(@:.h.d=.h)T3
sed $(sed-remove-objpfx) $(sed-remove-dotdot) \
$(@:.h=.h.d)T > $(@:.h=.h.d)T2
rm -f $(@:.h=.h.d)T
mv -f $(@:.h=.h.d)T2 $(@:.h=.h.d)
mv -f $(@:.h.d=.h)T $(@:.h.d=.h)
vpath %.sym $(sysdirs)
before-compile += $(gen-as-const-headers:%.sym=$(common-objpfx)%.h)
tests += $(gen-as-const-headers:%.sym=test-as-const-%)
generated += $(gen-as-const-headers:%.sym=test-as-const-%.c)
$(objpfx)test-as-const-%.c: $(..)scripts/gen-as-const.awk $(..)Makerules \
%.sym $(common-objpfx)%.h
($(AWK) '{ sub(/^/, "asconst_", $$2); print; }' $(filter %.h,$^); \
$(AWK) -v test=1 -f $< $(filter %.sym,$^); \
echo '#include "$(..)test-skeleton.c"') > $@T
mv -f $@T $@
endif
ifeq (yes,$(build-shared))
# Generate the header containing the names of all shared libraries.
# We use a stamp file to avoid unnecessary recompilations.
before-compile += $(common-objpfx)gnu/lib-names.h
ifeq ($(soversions.mk-done),t)
ifndef abi-variants
lib-names-h-abi = gnu/lib-names.h
lib-names-stmp-abi = gnu/lib-names.stmp
else
lib-names-h-abi = gnu/lib-names-$(default-abi).h
lib-names-stmp-abi = gnu/lib-names-$(default-abi).stmp
before-compile += $(common-objpfx)$(lib-names-h-abi)
common-generated += gnu/lib-names.h
install-others-nosubdir: $(inst_includedir)/$(lib-names-h-abi)
$(common-objpfx)gnu/lib-names.h:
$(make-target-directory)
{ \
echo '/* This file is automatically generated.';\
echo ' It defines macros to allow user program to find the shared'; \
echo ' library files which come as part of GNU libc. */'; \
echo '#ifndef __GNU_LIB_NAMES_H'; \
echo '#define __GNU_LIB_NAMES_H 1'; \
echo ''; \
$(if $(abi-includes), \
$(foreach h,$(abi-includes), echo '#include <$(h)>';) \
echo '';) \
$(foreach v,$(abi-variants),\
$(if $(abi-$(v)-condition),\
echo '#if $(abi-$(v)-condition)'; \
echo '# include <gnu/lib-names-$(v).h>'); \
$(if $(abi-$(v)-condition),echo '#endif';)) \
echo ''; \
echo '#endif /* gnu/lib-names.h */'; \
} > $@
endif
$(common-objpfx)$(lib-names-h-abi): $(common-objpfx)$(lib-names-stmp-abi); @:
$(common-objpfx)$(lib-names-stmp-abi): $(..)scripts/lib-names.awk \
$(common-objpfx)soversions.i
$(make-target-directory)
{ \
$(if $(abi-variants), \
echo '/* This file is automatically generated. */';\
echo '#ifndef __GNU_LIB_NAMES_H'; \
echo '# error "Never use <$(lib-names-h-abi)> directly; include <gnu/lib-names.h> instead."'; \
echo '#endif';, \
echo '/* This file is automatically generated.';\
echo ' It defines macros to allow user program to find the shared'; \
echo ' library files which come as part of GNU libc. */'; \
echo '#ifndef __GNU_LIB_NAMES_H'; \
echo '#define __GNU_LIB_NAMES_H 1';) \
echo ''; \
($(foreach s,$(all-sonames), echo $(s);)) \
| LC_ALL=C $(AWK) -f $(firstword $^) | LC_ALL=C sort; \
$(if $(abi-variants),, \
echo ''; \
echo '#endif /* gnu/lib-names.h */';) \
} > ${@:stmp=T}
$(move-if-change) ${@:stmp=T} ${@:stmp=h}
touch $@
endif
common-generated += $(lib-names-h-abi) $(lib-names-stmp-abi)
endif
###############################################################################
# NOTE! Everything adding to before-compile needs to come before this point! #
###############################################################################
# Generate an ordered list of implicit rules which find the source files in
# each sysdep directory. The old method was to use vpath to search all the
# sysdep directories. However, that had the problem that a .S file in a
# later directory would be chosen over a .c file in an earlier directory,
# which does not preserve the desired sysdeps ordering behavior.
# System-dependent makefiles can put in `inhibit-sysdep-asm' regexps
# matching sysdep directories whose assembly source files should be
# suppressed.
-include $(common-objpfx)sysd-rules
ifneq ($(sysd-rules-sysdirs),$(config-sysdirs))
# The value of $(+sysdep_dirs) the sysd-rules was computed for
# differs from the one we are using now. So force a rebuild of sysd-rules.
sysd-rules-force = FORCE
FORCE:
endif
$(common-objpfx)sysd-rules: $(..)scripts/sysd-rules.awk \
$(common-objpfx)config.make $(..)Makerules \
$(sysdep-makefiles) $(sysdep-makeconfigs) \
$(sysd-rules-force)
-@rm -f $@T
LC_ALL=C $(AWK) -f $< > $@T \
-v all_object_suffixes='$(all-object-suffixes)' \
-v inhibit_sysdep_asm='$(inhibit-sysdep-asm)' \
-v sysd_rules_patterns='$(sysd-rules-patterns)' \
-v config_sysdirs='$(config-sysdirs)'
mv -f $@T $@
ifndef sysd-rules-done
# Don't do deps until this exists, because it provides rules to make the deps.
no_deps=t
endif
define o-iterator-doit
$(objpfx)%$o: %.S $(before-compile); $$(compile-command.S)
endef
object-suffixes-left := $(all-object-suffixes)
include $(o-iterator)
define o-iterator-doit
$(objpfx)%$o: %.c $(before-compile); $$(compile-command.c)
endef
object-suffixes-left := $(all-object-suffixes)
include $(o-iterator)
define o-iterator-doit
$(objpfx)%$o: %.cc $(before-compile); $$(compile-command.cc)
endef
object-suffixes-left := $(all-object-suffixes)
include $(o-iterator)
# Omit the objpfx rules when building in the source tree, because
# objpfx is empty and so these rules just override the ones above.
ifdef objpfx
# Define first rules to find the source files in $(objpfx).
# Generated source files will end up there.
define o-iterator-doit
$(objpfx)%$o: $(objpfx)%.S $(before-compile); $$(compile-command.S)
endef
object-suffixes-left := $(all-object-suffixes)
include $(o-iterator)
define o-iterator-doit
$(objpfx)%$o: $(objpfx)%.c $(before-compile); $$(compile-command.c)
endef
object-suffixes-left := $(all-object-suffixes)
include $(o-iterator)
endif
# Generate version maps, but wait until sysdep-subdirs is known
ifeq ($(sysd-sorted-done),t)
ifeq ($(build-shared),yes)
-include $(common-objpfx)sysd-versions
$(addprefix $(common-objpfx),$(version-maps)): $(common-objpfx)sysd-versions
common-generated += $(version-maps)
postclean-generated += sysd-versions Versions.all abi-versions.h \
Versions.def Versions.v.i Versions.v
ifndef avoid-generated
ifneq ($(sysd-versions-subdirs),$(sorted-subdirs) $(config-sysdirs))
sysd-versions-force = FORCE
FORCE:
endif
$(common-objpfx)Versions.def: $(..)scripts/versionlist.awk \
$(common-objpfx)Versions.v
LC_ALL=C $(AWK) -f $^ > $@T
mv -f $@T $@
$(common-objpfx)Versions.all: $(..)scripts/firstversions.awk \
$(common-objpfx)soversions.i \
$(common-objpfx)Versions.def
{ while read which lib version setname; do \
test x"$$which" = xDEFAULT || continue; \
test -z "$$setname" || echo "$$lib : $$setname"; \
done < $(word 2,$^); \
cat $(word 3,$^); \
} | LC_ALL=C $(AWK) -f $< > $@T
mv -f $@T $@
# 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.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,$^); \
) > $@T
mv -f $@T $@
endif # avoid-generated
endif # $(build-shared) = yes
endif # sysd-sorted-done
# Generate .dT files as we compile.
compile-mkdep-flags = -MD -MP -MF $@.dt -MT $@
compile-command.S = $(compile.S) $(OUTPUT_OPTION) $(compile-mkdep-flags)
compile-command.c = $(compile.c) $(OUTPUT_OPTION) $(compile-mkdep-flags)
compile-command.cc = $(compile.cc) $(OUTPUT_OPTION) $(compile-mkdep-flags)
# Like compile-mkdep-flags, but for use with $(BUILD_CC). We don't want to
# track system includes here, they may spuriously trigger an install rule,
# and would cause the check-local-headers test to fail.
native-compile-mkdep-flags = -MMD -MP -MF $@.dt -MT $@
# GCC can grok options after the file name, and it looks nicer that way.
compile.c = $(CC) $< -c $(CFLAGS) $(CPPFLAGS)
compile.cc = $(CXX) $< -c $(CXXFLAGS) $(CPPFLAGS)
compile.S = $(CC) $< -c $(CPPFLAGS) $(S-CPPFLAGS) \
$(ASFLAGS) $(ASFLAGS-$(suffix $@))
COMPILE.c = $(CC) -c $(CFLAGS) $(CPPFLAGS)
COMPILE.S = $(CC) -c $(CPPFLAGS) $(S-CPPFLAGS) \
$(ASFLAGS) $(ASFLAGS-$(suffix $@))
# We need this for the output to go in the right place. It will default to
# empty if make was configured to work with a cc that can't grok -c and -o
# together. You can't compile the C library with such a compiler.
OUTPUT_OPTION = -o $@
# This is the end of the pipeline for compiling generated C code.
compile-stdin.c = $(COMPILE.c) -o $@ -x c - $(compile-mkdep-flags)
# We need the $(CFLAGS) to be in there to have the right predefines during
# the dependency run for C sources. But having it for assembly sources can
# get the wrong predefines.
S-CPPFLAGS = -DASSEMBLER $(asm-CPPFLAGS)
define +make-deps
$(make-target-directory)
$(+mkdep) $< $(if $(filter %.c,$<),$(CFLAGS)) \
$(CPPFLAGS) $($(patsubst .%,%,$(suffix $(<F)))-CPPFLAGS) | sed -e\
's,$(subst .,\.,$(@F:.d=.o)),$(foreach o,$(all-object-suffixes),$(@:.d=$o)) $@,' \
$(sed-remove-objpfx) $(sed-remove-dotdot) > $(@:.d=.T)
mv -f $(@:.d=.T) $@ $(generate-md5)
endef
ifneq (,$(objpfx))
# Continuation lines here are dangerous because they introduce spaces!
define sed-remove-objpfx
-e 's@ $(subst .,\.,$(subst @,\@,$(common-objpfx)))@ $$(common-objpfx)@g' \
-e 's@^$(subst .,\.,$(subst @,\@,$(common-objpfx)))@$$(common-objpfx)@g'
endef
endif
# Modify the list of routines we build for different targets
ifeq (yes,$(build-shared))
ifndef libc.so-version
# Undefine this because it can't work when we libc.so is unversioned.
static-only-routines =
endif
endif
elide-routines.oS += $(filter-out $(static-only-routines),\
$(routines) $(aux) $(sysdep_routines))
elide-routines.os += $(static-only-routines)
# If we have versioned code we don't need the old versions in any of the
# static libraries.
elide-routines.o += $(shared-only-routines)
elide-routines.op += $(shared-only-routines)
elide-routines.og += $(shared-only-routines)
# Shared library building.
ifeq (yes,$(build-shared))
# Reference map file only when shared libraries are built and a map file name
# is given.
ifeq ($(build-shared),yes)
map-file = $(firstword $($(@F:.so=-map)) \
$(addprefix $(common-objpfx), \
$(filter $(@F:.so=.map),$(version-maps))))
load-map-file = $(map-file:%=-Wl,--version-script=%)
endif
# Compiler arguments to use to link a shared object with libc and
# ld.so. This is intended to be as similar as possible to a default
# link with an installed libc.
link-libc-args = -Wl,--start-group \
$(libc-for-link) \
$(common-objpfx)libc_nonshared.a \
$(as-needed) $(elf-objpfx)ld.so $(no-as-needed) \
-Wl,--end-group
# The corresponding shared libc to use. This may be modified for a
# particular target.
libc-for-link = $(common-objpfx)libc.so
# The corresponding dependencies. As these are used in dependencies,
# not just commands, they cannot use target-specific variables so need
# to name both possible libc.so objects.
link-libc-deps = $(common-objpfx)libc.so $(common-objpfx)linkobj/libc.so \
$(common-objpfx)libc_nonshared.a $(elf-objpfx)ld.so
# Pattern rule to build a shared object from an archive of PIC objects.
# This must come after the installation rules so Make doesn't try to
# build shared libraries in place from the installed *_pic.a files.
# $(LDLIBS-%.so) may contain -l switches to generate run-time dependencies
# on other shared objects. The linking with libc and ld.so is intended
# to be as similar as possible to a default link with an installed libc.
lib%.so: lib%_pic.a $(+preinit) $(+postinit) $(link-libc-deps)
$(build-shlib) $(link-libc-args)
$(call after-link,$@)
define build-shlib-helper
$(LINK.o) -shared -static-libgcc -Wl,-O1 $(sysdep-LDFLAGS) \
$(if $($(@F)-no-z-defs)$(no-z-defs),,-Wl,-z,defs) $(rtld-LDFLAGS) \
$(extra-B-$(@F:lib%.so=%).so) -B$(csu-objpfx) \
$(extra-B-$(@F:lib%.so=%).so) $(load-map-file) \
-Wl,-soname=lib$(libprefix)$(@F:lib%.so=%).so$($(@F)-version) \
$(LDFLAGS.so) $(LDFLAGS-$(@F:lib%.so=%).so) \
-L$(subst :, -L,$(rpath-link)) -Wl,-rpath-link=$(rpath-link)
endef
ifeq (yes,$(use-default-link))
# If the linker is good enough, we can let it use its default linker script.
shlib-lds =
shlib-lds-flags =
else
# binutils only position loadable notes into the first page for binaries,
# not for shared objects
$(common-objpfx)shlib.lds: $(common-objpfx)config.make $(..)Makerules
$(LINK.o) -shared -Wl,-O1 \
-nostdlib -nostartfiles \
$(sysdep-LDFLAGS) $(rtld-LDFLAGS) $(LDFLAGS.so) \
-Wl,--verbose 2>&1 | \
sed > $@T \
-e '/^=========/,/^=========/!d;/^=========/d' \
$(if $(filter yes,$(have-hash-style)), \
-e 's/^.*\.gnu\.hash[ ]*:.*$$/ .note.ABI-tag : { *(.note.ABI-tag) } &/' \
-e '/^[ ]*\.hash[ ]*:.*$$/{h;d;}' \
-e '/DATA_SEGMENT_ALIGN/{H;g}' \
, \
-e 's/^.*\.hash[ ]*:.*$$/ .note.ABI-tag : { *(.note.ABI-tag) } &/' \
) \
-e 's/^.*\*(\.dynbss).*$$/& \
PROVIDE(__start___libc_freeres_ptrs = .); \
*(__libc_freeres_ptrs) \
PROVIDE(__stop___libc_freeres_ptrs = .);/'\
-e 's@^.*\*(\.jcr).*$$@& \
PROVIDE(__start___libc_subfreeres = .);\
__libc_subfreeres : { *(__libc_subfreeres) }\
PROVIDE(__stop___libc_subfreeres = .);\
PROVIDE(__start___libc_atexit = .);\
__libc_atexit : { *(__libc_atexit) }\
PROVIDE(__stop___libc_atexit = .);\
PROVIDE(__start___libc_thread_subfreeres = .);\
__libc_thread_subfreeres : { *(__libc_thread_subfreeres) }\
PROVIDE(__stop___libc_thread_subfreeres = .);\
PROVIDE(__start___libc_IO_vtables = .);\
__libc_IO_vtables : { *(__libc_IO_vtables) }\
PROVIDE(__stop___libc_IO_vtables = .);\
/DISCARD/ : { *(.gnu.glibc-stub.*) }@'
test -s $@T
mv -f $@T $@
common-generated += shlib.lds
shlib-lds = $(common-objpfx)shlib.lds
shlib-lds-flags = -T $(shlib-lds)
endif
define build-shlib
$(build-shlib-helper) -o $@ $(shlib-lds-flags) \
$(csu-objpfx)abi-note.o $(build-shlib-objlist)
endef
define build-module-helper
$(LINK.o) -shared -static-libgcc $(sysdep-LDFLAGS) $(rtld-LDFLAGS) \
$(if $($(@F)-no-z-defs)$(no-z-defs),,-Wl,-z,defs) \
-B$(csu-objpfx) $(load-map-file) \
$(LDFLAGS.so) $(LDFLAGS-$(@F:%.so=%).so) \
-L$(subst :, -L,$(rpath-link)) -Wl,-rpath-link=$(rpath-link)
endef
# This macro is similar to build-shlib but it does not define a soname
# and it does not depend on the destination name to start with `lib'.
# binutils only position loadable notes into the first page for binaries,
# not for shared objects
define build-module
$(build-module-helper) -o $@ $(shlib-lds-flags) \
$(csu-objpfx)abi-note.o $(build-module-objlist) $(link-libc-args)
$(call after-link,$@)
endef
define build-module-asneeded
$(build-module-helper) -o $@ $(shlib-lds-flags) \
$(csu-objpfx)abi-note.o \
-Wl,--as-needed $(build-module-objlist) -Wl,--no-as-needed \
$(link-libc-args)
$(call after-link,$@)
endef
build-module-helper-objlist = \
$(patsubst %_pic.a,$(whole-archive) %_pic.a $(no-whole-archive),\
$(filter-out %.lds $(map-file) $(+preinit) $(+postinit) \
$(link-libc-deps),$^))
build-module-objlist = $(build-module-helper-objlist) $(LDLIBS-$(@F:%.so=%).so)
build-shlib-objlist = $(build-module-helper-objlist) \
$(LDLIBS-$(@F:lib%.so=%).so)
# Don't try to use -lc when making libc.so itself.
# Also omits crti.o and crtn.o, which we do not want
# since we define our own `.init' section specially.
LDFLAGS-c.so = -nostdlib -nostartfiles
# But we still want to link libc.so against $(libc.so-gnulib).
LDLIBS-c.so += $(libc.so-gnulib)
# Give libc.so an entry point and make it directly runnable itself.
LDFLAGS-c.so += -e __libc_main
# If lazy relocation is disabled add the -z now flag.
ifeq ($(bind-now),yes)
LDFLAGS-c.so += -Wl,-z,now
endif
# Pre-link the objects of libc_pic.a so that we can locally resolve
# COMMON symbols before we link against ld.so. This is because ld.so
# contains some of libc_pic.a already, which will prevent the COMMONs
# from being allocated in libc.so, which introduces evil dependencies
# between libc.so and ld.so, which can make it impossible to upgrade.
$(common-objpfx)libc_pic.os: $(common-objpfx)libc_pic.a
$(LINK.o) -nostdlib -nostartfiles -r -o $@ \
$(LDFLAGS-c_pic.os) -Wl,-d $(whole-archive) $^ -o $@
ifeq (,$(strip $(shlib-lds-flags)))
# Generate a list of -R options to excise .gnu.glibc-stub.* sections.
$(common-objpfx)libc_pic.opts: $(common-objpfx)libc_pic.os
$(OBJDUMP) -h $< | \
$(AWK) '$$2 ~ /\.gnu\.glibc-stub\./ { print "-R", $$2 }' \
> $@T
mv -f $@T $@
# Apply those -R options.
$(common-objpfx)libc_pic.os.clean: $(common-objpfx)libc_pic.opts \
$(common-objpfx)libc_pic.os
$(OBJCOPY) @$^ $@
generated += libc_pic.opts libc_pic.os.clean
libc_pic_clean := .clean
endif
# Build a possibly-modified version of libc_pic.a for use in building
# linkobj/libc.so.
ifeq (,$(filter sunrpc,$(subdirs)))
$(common-objpfx)linkobj/libc_pic.a: $(common-objpfx)libc_pic.a
$(make-target-directory)
ln -f $< $@
else
$(common-objpfx)linkobj/libc_pic.a: $(common-objpfx)libc_pic.a \
$(common-objpfx)sunrpc/librpc_compat_pic.a
$(make-target-directory)
(cd $(common-objpfx)linkobj; \
$(AR) x ../libc_pic.a; \
rm $$($(AR) t ../sunrpc/librpc_compat_pic.a | sed 's/^compat-//'); \
$(AR) x ../sunrpc/librpc_compat_pic.a; \
$(AR) cr libc_pic.a *.os; \
rm *.os)
endif # $(subdirs) contains sunrpc
# Clear link-libc-deps for the libc.so libraries so build-shlibs does not
# filter ld.so out of the list of linked objects.
$(common-objpfx)libc.so: link-libc-deps = # empty
$(common-objpfx)linkobj/libc.so: link-libc-deps = # empty
# Use our own special initializer and finalizer files for the libc.so
# libraries.
$(common-objpfx)libc.so: $(elf-objpfx)soinit.os \
$(common-objpfx)libc_pic.os$(libc_pic_clean) \
$(elf-objpfx)sofini.os \
$(elf-objpfx)interp.os \
$(elf-objpfx)ld.so \
$(shlib-lds)
$(build-shlib)
$(call after-link,$@)
$(common-objpfx)linkobj/libc.so: $(elf-objpfx)soinit.os \
$(common-objpfx)linkobj/libc_pic.a \
$(elf-objpfx)sofini.os \
$(elf-objpfx)interp.os \
$(elf-objpfx)ld.so \
$(shlib-lds)
$(build-shlib)
$(call after-link,$@)
ifeq ($(build-shared),yes)
$(common-objpfx)libc.so: $(common-objpfx)libc.map
endif
common-generated += libc.so libc_pic.os
ifdef libc.so-version
$(common-objpfx)libc.so$(libc.so-version): $(common-objpfx)libc.so
$(make-link)
common-generated += libc.so$(libc.so-version)
endif
endif
# Figure out the source filenames in this directory.
override sources := $(addsuffix .c,\
$(filter-out $(elided-routines),\
$(routines) $(aux) \
$(sysdep_routines)))
sysdep_routines := $(sysdep_routines)
headers := $(headers) $(sysdep_headers)
# This is the list of all object files, gotten by
# replacing every ".c" in `sources' with a ".o".
override objects := $(addprefix $(objpfx),$(sources:.c=.o))
# The makefile may define $(extra-libs) with `libfoo libbar'
# to build libfoo.a et al from the modules listed in $(libfoo-routines).
ifdef extra-libs
# extra-lib.mk is included once for each extra lib to define rules
# to build it, and to add its objects to the various variables.
# During its evaluation, $(lib) is set to the name of the library.
extra-libs-left := $(extra-libs)
include $(patsubst %,$(..)extra-lib.mk,$(extra-libs))
endif
# The makefile may define $(modules-names) to build additional modules.
# These are built with $(build-module), except any in $(modules-names-nobuild).
ifdef modules-names
# extra-lib.mk is included once for each extra lib to define rules
# to build it, and to add its objects to the various variables.
# During its evaluation, $(lib) is set to the name of the library.
extra-modules-left := $(modules-names)
include $(patsubst %,$(..)extra-modules.mk,$(modules-names))
extra-modules-build := $(filter-out $(modules-names-nobuild),$(modules-names))
$(extra-modules-build:%=$(objpfx)%.so): $(objpfx)%.so: \
$(objpfx)%.os $(shlib-lds) $(link-libs-deps)
$(build-module)
endif
+depfiles := $(sources:.c=.d) \
$(patsubst %.o,%.d,$(filter %.o,$(extra-objs:.os=.o))) \
$(patsubst %.oS,%.d,$(filter %.oS,$(extra-objs))) \
$(patsubst %.o,%.d,$(filter %.o,$(extra-test-objs:.os=.o))) \
$(addsuffix .d,$(tests) $(xtests) $(test-srcs))
ifeq ($(build-programs),yes)
+depfiles += $(addsuffix .d,$(others) $(sysdep-others))
endif
+depfiles := $(addprefix $(objpfx),\
$(filter-out $(addsuffix .d,$(omit-deps)),\
$(+depfiles)))
all-dt-files := $(foreach o,$(object-suffixes-for-libc),$(+depfiles:.d=$o.dt))
+depfiles := $(patsubst %.dt,%.d,$(wildcard $(all-dt-files))) \
$(wildcard $(all-dt-files:.dt=.d))
# This is a funny rule in that it removes its input file.
%.d: %.dt
@sed $(sed-remove-objpfx) $< > $(@:.d=.T) && \
mv -f $(@:.d=.T) $@ && \
rm -f $<
# Avoid the .h.d files for any .sym files whose .h files don't exist yet.
# They will be generated when they're needed, and trying too early won't work.
+gen-as-const := $(gen-as-const-headers:%.sym=$(common-objpfx)%.h)
+depfiles += $(addsuffix .d,$(filter $(wildcard $(+gen-as-const)),\
$(+gen-as-const)))
ifdef +depfiles
ifneq ($(no_deps),t)
-include $(+depfiles)
endif
endif
# Maximize efficiency by minimizing the number of rules.
.SUFFIXES: # Clear the suffix list. We don't use suffix rules.
# Don't define any builtin rules.
MAKEFLAGS := $(MAKEFLAGS)r
# Generic rule for making directories.
%/:
# mkdir isn't smart enough to strip a trailing /.
# We always require a mkdir which supports the -p option to avoid error
# messages in case of races.
mkdir -p $(@:%/=%)
# Make sure that object files are not removed
# when they are intermediates between sources and library members.
.PRECIOUS: $(addprefix $(objpfx)%,$(all-object-suffixes))
# Make sure that the parent library archive is never removed.
.PRECIOUS: $(foreach l,$(libtypes),$(patsubst %,$(common-objpfx)$l,c))
# Use the verbose option of ar and tar when not running silently.
ifeq "$(findstring s,$(MAKEFLAGS))" "" # if not -s
verbose := v
else # -s
verbose :=
endif # not -s
ARFLAGS := r$(verbose)
CREATE_ARFLAGS := cru$(verbose)
# This makes all the object files in the parent library archive.
.PHONY: lib lib-noranlib
lib: lib-noranlib $(foreach l,$(libtypes),$(patsubst %,$(common-objpfx)$l,c))
lib-noranlib: libobjs
# For object-suffix $o, the list of objects with that suffix.
# Makefiles can define `elide-routines.so = foo' to leave foo.so out.
o-objects = $(patsubst %.o,%$o,$(filter-out $(patsubst %,$(objpfx)%.o,\
$(elide-routines$o)),\
$(objects))) \
$(addprefix $(objpfx),$(o-objects$o))
others: $(addprefix $(objpfx),$(install-lib))
ifndef objects
# Create the stamp$o files to keep the parent makefile happy.
subdir_lib: $(foreach o,$(object-suffixes-for-libc),$(objpfx)stamp$o)
$(foreach o,$(object-suffixes-for-libc),$(objpfx)stamp$o):
$(make-target-directory)
rm -f $@; > $@
else
# Define explicit rules to update each $(objpfx)stamp.SUFFIX
# timestamp file; these rules (one explicit rule is generated for each
# object suffix) write a list of objects to update in the stamp file.
# The parent will then actually add them all to the archive in the
# archive rule, below.
define o-iterator-doit
$(objpfx)stamp$o: $(o-objects); $$(do-stamp)
endef
define do-stamp
$(make-target-directory)
echo '$(patsubst $(objpfx)%,$(addsuffix /,$(subdir))%,$^)' > $@T
mv -f $@T $@
endef
object-suffixes-left := $(object-suffixes-for-libc)
include $(o-iterator)
endif
# Now define explicit rules to build the library archives; these depend
# on the stamp files built above.
define o-iterator-doit
$(common-objpfx)$(patsubst %,$(libtype$o),c): \
$(subdirs-stamp-o) $(common-objpfx)stamp$o; $$(do-makelib)
endef
define do-makelib
cd $(common-objdir) && \
$(AR) $(CREATE_ARFLAGS) $(@F) `cat $(patsubst $(common-objpfx)%,%,$^)`
endef
subdirs-stamps := $(foreach d,$(subdirs),$(common-objpfx)$d/stamp%)
subdirs-stamp-o = $(subst %,$o,$(subdirs-stamps))
ifndef subdir
$(subdirs-stamps): subdir_lib;
endif
object-suffixes-left = $(object-suffixes-for-libc)
include $(o-iterator)
# This makes all the object files.
.PHONY: objects objs libobjs extra-objs
objects objs: libobjs extra-objs
libobjs: $(foreach o,$(object-suffixes-for-libc),$(objpfx)stamp$o)
extra-objs: $(addprefix $(objpfx),$(extra-objs))
# Canned sequence for building an extra library archive.
define build-extra-lib
$(patsubst %/,cd % &&,$(objpfx)) \
$(AR) $(CREATE_ARFLAGS) $(@:$(objpfx)%=%) \
$(patsubst $(objpfx)%,%,$^)
endef
# Installation.
.PHONY: force-install
force-install:
# $(install-lib) are installed from the object directory into $(libdir);
# files in $(install-lib) matching `lib%.a' are ranlib'd after installation
# unless they also appear in $(non-lib.a). $(install-data) are installed as
# they are into $(datadir). $(headers) are installed as they are in
# $(includedir). $(install-bin), $(install-bin-script) and $(install-sbin)
# are installed from the object directory into $(bindir), $(bindir) and
# $(sbindir), respectively. $(install-others) and $(install-others-programs)
# are absolute path names of files to install; rules to install them are
# defined elsewhere.
# The simple library name to install libc.a under.
# This could be defined by a sysdep Makefile.
ifndef libc-name
libc-name := c
endif
define do-install
$(make-target-directory)
$(INSTALL_DATA) $< $@
endef
# Make the target directory if it doesn't exist, using the `mkinstalldirs'
# script that does `mkdir -p' even if `mkdir' doesn't support that flag.
define make-target-directory
$(addprefix $(..)./scripts/mkinstalldirs ,\
$(filter-out $(wildcard $(@D:%/=%)),$(@D:%/=%)))
endef
# Any directory (parent or subdir) should install libc.a; this way
# "make install" in a subdir is guaranteed to install everything it changes.
installed-libcs := $(foreach o,$(filter-out .os,$(object-suffixes-for-libc)),\
$(inst_libdir)/$(patsubst %,$(libtype$o),\
$(libprefix)$(libc-name)))
.PHONY: check-install-supported
check-install-supported:
# Check to see if the prefix or exec_prefix GNU standard variable
# has been overridden on the command line and, if so, fail with
# an error message since doing so is not supported (set DESTDIR
# instead).
ifeq ($(origin prefix),command line)
check-install-supported:
$(error Overriding prefix is not supported. Set DESTDIR instead.)
endif
ifeq ($(origin exec_prefix),command line)
check-install-supported:
$(error Overriding exec_prefix is not supported. Set DESTDIR instead.)
endif
install: check-install-supported
install: $(installed-libcs)
$(installed-libcs): $(inst_libdir)/lib$(libprefix)%: lib $(+force)
$(make-target-directory)
$(INSTALL_DATA) $(common-objpfx)lib$(*:$(libc-name)%=c%) $@
define do-install-program
$(make-target-directory)
$(INSTALL_PROGRAM) $< $@.new
mv -f $@.new $@
endef
define do-install-script
$(make-target-directory)
$(INSTALL_SCRIPT) $< $@.new
mv -f $@.new $@
endef
install-lib.so := $(filter %.so,$(install-lib:%_pic.a=%.so))
install-lib := $(filter-out %.so %_pic.a,$(install-lib))
ifeq (yes,$(build-shared))
# Find which .so's have versions.
versioned := $(strip $(foreach so,$(install-lib.so),\
$(patsubst %,$(so),$($(so)-version))))
install-lib.so-versioned := $(filter $(versioned), $(install-lib.so))
install-lib.so-unversioned := $(filter-out $(versioned), $(install-lib.so))
# For versioned libraries, we install three files:
# $(inst_libdir)/libfoo.so -- for linking, symlink or ld script
# $(inst_slibdir)/libfoo.so.NN -- for loading by SONAME, symlink
# $(inst_slibdir)/libfoo-X.Y.Z.so -- the real shared object file
lib-version := $(firstword $($(subdir)-version) $(version))
install-lib-nosubdir: $(install-lib.so-unversioned:%=$(inst_slibdir)/%) \
$(foreach L,$(install-lib.so-versioned),\
$(inst_libdir)/$L \
$(inst_slibdir)/$(L:.so=)-$(lib-version).so \
$(inst_slibdir)/$L$($L-version))
# Install all the unversioned shared libraries.
$(install-lib.so-unversioned:%=$(inst_slibdir)/%): $(inst_slibdir)/%.so: \
$(objpfx)%.so $(+force)
$(do-install-program)
ifneq ($(findstring -s,$(LN_S)),)
define make-link
rm -f $@.new
$(SHELL) $(..)scripts/rellns-sh $< $@.new
mv -f $@.new $@
endef
else
# If we have no symbolic links don't bother with rellns-sh.
define make-link
rm -f $@.new
$(LN_S) $< $@.new
mv -f $@.new $@
endef
endif
ifeq (yes,$(build-shared))
ifeq (no,$(cross-compiling))
symbolic-link-prog := $(elf-objpfx)sln
symbolic-link-list := $(elf-objpfx)symlink.list
define make-shlib-link
echo `$(..)scripts/rellns-sh -p $< $@` $@ >> $(symbolic-link-list)
endef
else # cross-compiling
# We need a definition that can be used by elf/Makefile's install rules.
symbolic-link-prog = $(LN_S)
endif
endif
ifndef make-shlib-link
define make-shlib-link
rm -f $@
$(LN_S) `$(..)scripts/rellns-sh -p $< $@` $@
endef
endif
ifdef libc.so-version
# For a library specified to be version N, install three files:
# libc.so -> libc.so.N (e.g. libc.so.6)
# libc.so.6 -> libc-VERSION.so (e.g. libc-1.10.so)
$(inst_slibdir)/libc.so$(libc.so-version): $(inst_slibdir)/libc-$(version).so \
$(+force)
$(make-shlib-link)
$(inst_slibdir)/libc-$(version).so: $(common-objpfx)libc.so $(+force)
$(do-install-program)
install: $(inst_slibdir)/libc.so$(libc.so-version)
# This fragment of linker script gives the OUTPUT_FORMAT statement
# for the configuration we are building. We put this statement into
# the linker scripts we install for -lc et al so that they will not be
# used by a link for a different format on a multi-architecture system.
$(common-objpfx)format.lds: $(..)scripts/output-format.sed \
$(common-objpfx)config.make \
$(common-objpfx)config.h $(..)Makerules
ifneq (unknown,$(output-format))
echo > $@.new 'OUTPUT_FORMAT($(output-format))'
else
$(LINK.o) -shared $(sysdep-LDFLAGS) $(rtld-LDFLAGS) $(LDFLAGS.so) \
-x c /dev/null -o $@.so -Wl,--verbose -v 2>&1 \
| sed -n -f $< > $@.new
test -s $@.new
rm -f $@.so
endif
mv -f $@.new $@
common-generated += format.lds
ifndef subdir
# What we install as libc.so for programs to link against is in fact a
# link script. It contains references for the various libraries we need.
# The libc.so object is not complete since some functions are only defined
# in libc_nonshared.a.
# We need to use absolute paths since otherwise local copies (if they exist)
# of the files are taken by the linker.
install: $(inst_libdir)/libc.so
$(inst_libdir)/libc.so: $(common-objpfx)format.lds \
$(common-objpfx)libc.so$(libc.so-version) \
$(inst_libdir)/$(patsubst %,$(libtype.oS),\
$(libprefix)$(libc-name)) \
$(+force)
(echo '/* GNU ld script';\
echo ' Use the shared library, but some functions are only in';\
echo ' the static library, so try that secondarily. */';\
cat $<; \
echo 'GROUP ( $(slibdir)/libc.so$(libc.so-version)' \
'$(libdir)/$(patsubst %,$(libtype.oS),$(libprefix)$(libc-name))'\
' AS_NEEDED (' $(rtlddir)/$(rtld-installed-name) ') )' \
) > $@.new
mv -f $@.new $@
endif
else
install: $(inst_slibdir)/libc.so
$(inst_slibdir)/libc.so: $(common-objpfx)libc.so $(+force)
$(do-install-program)
endif
ifneq (,$(versioned))
# Produce three sets of rules as above for all the smaller versioned libraries.
define o-iterator-doit
$(inst_libdir)/$o: $(inst_slibdir)/$o$($o-version) $(+force); $$(make-link)
endef
object-suffixes-left := $(filter-out $(install-lib-ldscripts),$(versioned))
ifneq (,$(object-suffixes-left))
include $(o-iterator)
endif
# Make symlinks in the build directory, because the versioned names might
# be referenced by a DT_NEEDED in another library.
define o-iterator-doit
$(objpfx)$o$($o-version): $(objpfx)$o; $$(make-link)
endef
object-suffixes-left := $(versioned)
include $(o-iterator)
generated += $(foreach o,$(versioned),$o$($o-version))
ifeq (,$($(subdir)-version))
define o-iterator-doit
$(inst_slibdir)/$o$($o-version): $(inst_slibdir)/$(o:.so=)-$(version).so \
$(+force);
$$(make-shlib-link)
endef
object-suffixes-left := $(versioned)
include $(o-iterator)
define o-iterator-doit
$(inst_slibdir)/$(o:.so=)-$(version).so: $(objpfx)$o $(+force);
$$(do-install-program)
endef
object-suffixes-left := $(versioned)
include $(o-iterator)
else
define o-iterator-doit
$(inst_slibdir)/$o$($o-version): \
$(inst_slibdir)/$(o:.so=)-$($(subdir)-version).so $(+force);
$$(make-shlib-link)
endef
object-suffixes-left := $(versioned)
include $(o-iterator)
define o-iterator-doit
$(inst_slibdir)/$(o:.so=)-$($(subdir)-version).so: $(objpfx)$o $(+force);
$$(do-install-program)
endef
object-suffixes-left := $(versioned)
include $(o-iterator)
endif
endif
define do-install-so
$(do-install-program)
$(patsubst %,$(LN_S) -f $(@F) \
$(@D)/$(patsubst %$*.so,%,$(<F))$(libprefix)$*.so,\
$(filter-out %.so,$@))
endef
so-versions := $(sort $(foreach so,$(install-lib.so),.so$($(so)-version)))
$(foreach v,$(so-versions),\
$(inst_slibdir)/lib$(libprefix)%$v): $(common-objpfx)lib%.so \
$(+force)
$(do-install-so)
$(foreach v,$(so-versions),\
$(inst_slibdir)/$(libprefix)%$v): $(common-objpfx)%.so $(+force)
$(do-install-so)
endif
ifdef install-bin
$(addprefix $(inst_bindir)/,$(install-bin)): \
$(inst_bindir)/%: $(objpfx)% $(+force)
$(do-install-program)
endif
ifdef install-bin-script
$(addprefix $(inst_bindir)/,$(install-bin-script)): \
$(inst_bindir)/%: $(objpfx)% $(+force)
$(do-install-script)
endif
ifdef install-rootsbin
$(addprefix $(inst_rootsbindir)/,$(install-rootsbin)): \
$(inst_rootsbindir)/%: $(objpfx)% $(+force)
$(do-install-program)
endif
ifdef install-sbin
$(addprefix $(inst_sbindir)/,$(install-sbin)): \
$(inst_sbindir)/%: $(objpfx)% $(+force)
$(do-install-program)
endif
ifdef install-lib
install-lib.a := $(filter lib%.a,$(install-lib))
install-lib-non.a := $(filter-out lib%.a,$(install-lib))
ifdef install-lib-non.a
$(addprefix $(inst_libdir)/$(libprefix),$(install-lib-non.a)): \
$(inst_libdir)/$(libprefix)%: $(objpfx)% $(+force)
$(do-install)
endif
ifdef install-lib.a
$(install-lib.a:lib%.a=$(inst_libdir)/lib$(libprefix)%.a): \
$(inst_libdir)/lib$(libprefix)%.a: $(objpfx)lib%.a $(+force)
$(do-install)
endif
endif
ifdef install-data
$(addprefix $(inst_datadir)/,$(install-data)): $(inst_datadir)/%: % $(+force)
$(do-install)
endif
headers := $(strip $(headers))
ifdef headers
# This implicit rule installs headers from the source directory.
# It may be ignored in preference to rules from sysd-rules to find
# headers in the sysdeps tree.
$(inst_includedir)/%.h: $(objpfx)%.h $(+force)
$(do-install)
$(inst_includedir)/%.h: $(common-objpfx)%.h $(+force)
$(do-install)
$(inst_includedir)/%.h: %.h $(+force)
$(do-install)
$(inst_includedir)/%.h: $(..)include/%.h $(+force)
$(do-install)
headers-nonh := $(filter-out %.h,$(headers))
ifdef headers-nonh
$(addprefix $(inst_includedir)/,$(headers-nonh)): $(inst_includedir)/%: \
% $(+force)
$(do-install)
endif # headers-nonh
endif # headers
.PHONY: install-bin-nosubdir install-bin-script-nosubdir \
install-rootsbin-nosubdir install-sbin-nosubdir install-lib-nosubdir \
install-data-nosubdir install-headers-nosubdir
install-bin-nosubdir: $(addprefix $(inst_bindir)/,$(install-bin))
install-bin-script-nosubdir: $(addprefix $(inst_bindir)/,$(install-bin-script))
install-rootsbin-nosubdir: \
$(addprefix $(inst_rootsbindir)/,$(install-rootsbin))
install-sbin-nosubdir: $(addprefix $(inst_sbindir)/,$(install-sbin))
install-lib-nosubdir: $(addprefix $(inst_libdir)/,\
$(patsubst lib%.a,lib$(libprefix)%.a,$(install-lib.a)) \
$(addprefix $(libprefix),$(install-lib-non.a)))
install-data-nosubdir: $(addprefix $(inst_datadir)/,$(install-data))
install-headers-nosubdir: $(addprefix $(inst_includedir)/,$(headers))
install-others-nosubdir: $(install-others)
install-others-programs-nosubdir: $(install-others-programs)
# We need all the `-nosubdir' targets so that `install' in the parent
# doesn't depend on several things which each iterate over the subdirs.
# This rule makes `install-FOO' always use `install-FOO-nosubdir' as a
# subroutine. Then in the parent `install-FOO' also causes subdir makes.
install-%:: install-%-nosubdir ;
.PHONY: install install-no-libc.a-nosubdir
install-no-libc.a-nosubdir: install-headers-nosubdir install-data-nosubdir \
install-lib-nosubdir install-others-nosubdir
ifeq ($(build-programs),yes)
install-no-libc.a-nosubdir: install-bin-nosubdir install-bin-script-nosubdir \
install-rootsbin-nosubdir install-sbin-nosubdir \
install-others-programs-nosubdir
endif
install: install-no-libc.a-nosubdir
# Command to compile $< using the native libraries.
define native-compile
$(make-target-directory)
$(BUILD_CC) $($(basename $(<F))-CFLAGS) $(ALL_BUILD_CFLAGS) \
$< $(OUTPUT_OPTION) $(BUILD_LDFLAGS)
endef
# We always want to use configuration definitions.
ALL_BUILD_CFLAGS = $(BUILD_CFLAGS) $(BUILD_CPPFLAGS) -D_GNU_SOURCE \
-DIS_IN_build -include $(common-objpfx)config.h
# Support the GNU standard name for this target.
.PHONY: check
check: tests
# Special target to run tests which cannot be run unconditionally.
# Maintainers should use this target.
.PHONY: xcheck
xcheck: xtests
all-nonlib = $(strip $(tests) $(xtests) $(test-srcs) $(test-extras) $(others))
ifneq (,$(all-nonlib))
cpp-srcs-left = $(all-nonlib)
lib := nonlib
include $(patsubst %,$(..)cppflags-iterator.mk,$(cpp-srcs-left))
endif
ifeq ($(build-shared),yes)
# Generate normalized lists of symbols, versions, and data sizes.
# This is handy for checking against existing library binaries.
%.symlist: $(..)scripts/abilist.awk %.dynsym
LC_ALL=C $(AWK) -f $^ > $@T
mv -f $@T $@
%.dynsym: %.so
LC_ALL=C $(OBJDUMP) --dynamic-syms $< > $@T
mv -f $@T $@
# A sysdeps/.../Makefile can set abilist-pattern to something like
# %-foo.abilist to look for libc-foo.abilist instead of libc.abilist.
# This makes sense if multiple ABIs can be most cleanly supported by a
# configuration without using separate sysdeps directories for each.
ifdef abilist-pattern
vpath $(abilist-pattern) $(+sysdep_dirs)
endif
vpath %.abilist $(+sysdep_dirs)
# The .PRECIOUS rule prevents the files built by an implicit rule whose
# target pattern is %.symlist from being considered "intermediate files"
# and automatically removed. We only want these files to be removed by
# 'make clean', which is handled by the 'generated' variable.
.PRECIOUS: %.symlist
generated += $(extra-libs:=.symlist)
ifdef abilist-pattern
$(objpfx)check-abi-%.out: $(common-objpfx)config.make $(abilist-pattern) \
$(objpfx)%.symlist
$(check-abi-pattern); \
$(evaluate-test)
$(objpfx)check-abi-%.out: $(common-objpfx)config.make $(abilist-pattern) \
$(common-objpfx)%.symlist
$(check-abi-pattern); \
$(evaluate-test)
endif
$(objpfx)check-abi-%.out: $(common-objpfx)config.make %.abilist \
$(objpfx)%.symlist
$(check-abi); \
$(evaluate-test)
$(objpfx)check-abi-%.out: $(common-objpfx)config.make %.abilist \
$(common-objpfx)%.symlist
$(check-abi); \
$(evaluate-test)
define check-abi-pattern
diff -p -U 0 $(filter $(abilist-pattern),$^) $(filter %.symlist,$^) \
> $@
endef
define check-abi
diff -p -U 0 $(filter %.abilist,$^) $(filter %.symlist,$^) > $@
endef
ifdef abilist-pattern
update-abi-%: $(objpfx)%.symlist $(abilist-pattern)
$(update-abi-pattern)
update-abi-%: $(common-objpfx)%.symlist $(abilist-pattern)
$(update-abi-pattern)
endif
update-abi-%: $(objpfx)%.symlist %.abilist
$(update-abi)
update-abi-%: $(common-objpfx)%.symlist %.abilist
$(update-abi)
define update-abi-pattern
@if cmp -s $^ 2> /dev/null; \
then \
echo '+++ $(filter $(abilist-pattern),$^) is unchanged'; \
else cp -f $^; \
echo '*** Now check $(filter $(abilist-pattern),$^) changes for correctness ***'; \
fi
endef
define update-abi
@if cmp -s $^ 2> /dev/null; \
then \
echo '+++ $(filter %.abilist,$^) is unchanged'; \
else cp -f $^; \
echo '*** Now check $(filter %.abilist,$^) changes for correctness ***'; \
fi
endef
# Patch all .abilist files for one DSO. The find command locates
# abilist files for all architectures. The regular expression in the
# find invocation is needed to separate libc.abilist and
# libcrypt.abilist, for example. It assumes that abilist-pattern, if
# set, is of the form "%-SUFFIX", and not "%SUFFIX", that is, there is
# a non-alphanumeric seperator between the pattern and the suffix
# added. The abilist files in /generic/ are filtered out because
# these are expected to remain empty.
define update-all-abi
$(SHELL) $(..)scripts/update-abilist.sh $^ \
$$(find $(..)sysdeps \
-regextype posix-egrep -regex '.*/$*([^a-z0-9].*)?\.abilist$$' \
\! -regex '.*/generic/.*')
endef
ifdef abilist-pattern
update-all-abi-%: $(abilist-pattern) $(objpfx)%.symlist
$(update-all-abi)
update-all-abi-%: $(abilist-pattern) $(common-objpfx)%.symlist
$(update-all-abi)
endif
update-all-abi-%: %.abilist $(objpfx)%.symlist
$(update-all-abi)
update-all-abi-%: %.abilist $(common-objpfx)%.symlist
$(update-all-abi)
.PHONY: update-abi update-all-abi check-abi
update-abi: $(patsubst %.so,update-abi-%,$(install-lib.so-versioned))
update-all-abi: $(patsubst %.so,update-all-abi-%,$(install-lib.so-versioned))
check-abi-list = $(patsubst %.so,$(objpfx)check-abi-%.out, \
$(install-lib.so-versioned))
check-abi: $(check-abi-list)
ifdef subdir
subdir_check-abi: check-abi
subdir_update-abi: update-abi
subdir_update-all-abi: update-all-abi
else
check-abi: subdir_check-abi
if grep -q '^FAIL:' $(objpfx)*/check-abi*.test-result; then \
cat $(objpfx)*/check-abi*.out && exit 1; fi
update-abi: subdir_update-abi
update-all-abi: subdir_update-all-abi
endif
ifeq ($(subdir),elf)
check-abi: $(objpfx)check-abi-libc.out
tests-special += $(objpfx)check-abi-libc.out
update-abi: update-abi-libc
update-all-abi: update-all-abi-libc
common-generated += libc.symlist
endif
ifeq ($(build-shared),yes)
ifdef subdir
tests-special += $(check-abi-list)
endif
endif
endif
# These will have been set by sysdeps/posix/Makefile.
L_tmpnam ?= 1
TMP_MAX ?= 0
L_ctermid ?= 1
L_cuserid ?= 1
stdio_lim = $(common-objpfx)bits/stdio_lim.h
$(stdio_lim:lim.h=%.h) $(stdio_lim:lim.h=%.d): $(stdio_lim:lim.h=%.st); @:
$(stdio_lim:h=st): $(..)stdio-common/stdio_lim.h.in $(..)Rules \
$(common-objpfx)config.make
$(make-target-directory)
{ echo '#include "$(..)posix/bits/posix1_lim.h"'; \
echo '#define _LIBC 1'; \
echo '#include "$(..)misc/sys/uio.h"'; } | \
$(CC) -E -dM -MD -MP -MF $(@:st=dT) -MT '$(@:st=h) $(@:st=d)' \
$(CPPUNDEFS) $(+includes) -xc - -o $(@:st=hT)
sed $(sed-remove-objpfx) $(sed-remove-dotdot) \
$(@:st=dT) > $(@:st=dt)
mv -f $(@:st=dt) $(@:st=d)
fopen_max=`sed -n 's/^#define OPEN_MAX //1p' $(@:st=hT)`; \
filename_max=`sed -n 's/^#define PATH_MAX //1p' $(@:st=hT)`; \
iov_max=`sed -n 's/^#define UIO_MAXIOV //p' $(@:st=hT)`; \
fopen_max=$${fopen_max:-16}; \
filename_max=$${filename_max:-1024}; \
if [ -z "$$iov_max" ]; then \
define_iov_max="# undef IOV_MAX"; \
else \
define_iov_max="# define IOV_MAX $$iov_max"; \
fi; \
sed -e "s/@FOPEN_MAX@/$$fopen_max/" \
-e "s/@FILENAME_MAX@/$$filename_max/" \
-e "s/@L_tmpnam@/$(L_tmpnam)/" \
-e "s/@TMP_MAX@/$(TMP_MAX)/" \
-e "s/@L_ctermid@/$(L_ctermid)/" \
-e "s/@L_cuserid@/$(L_cuserid)/" \
-e "s/@define_IOV_MAX@/$$define_iov_max/" \
$< > $(@:st=h.new)
$(move-if-change) $(@:st=h.new) $(@:st=h)
# Remove these last so that they can be examined if something went wrong.
rm -f $(@:st=hT) $(@:st=dT) $(@:st=dt)
touch $@
# Get dependencies.
ifndef no_deps
-include $(stdio_lim:h=d)
endif
common-generated += bits/stdio_lim.h bits/stdio_lim.d bits/stdio_lim.st
FORCE:
.PHONY: echo-headers
echo-headers:
@echo $(headers)
%.bz2: %; bzip2 -9vk $<
%.gz: %; gzip -9vnc $< > $@.new && mv -f $@.new $@
%.xz: %; xz -9evk $<
# Common cleaning targets.
.PHONY: common-mostlyclean common-clean mostlyclean clean do-tests-clean
clean: common-clean
mostlyclean: common-mostlyclean
do-tests-clean:
-rm -f $(addprefix $(objpfx),$(addsuffix .out,$(tests) $(xtests) \
$(test-srcs)) \
$(addsuffix .test-result,$(tests) \
$(xtests) \
$(test-srcs)))
# Remove the object files.
common-mostlyclean:
-rm -f $(addprefix $(objpfx),$(tests) $(xtests) $(test-srcs) \
$(others) $(sysdep-others) stubs \
$(addsuffix .o,$(tests) $(xtests) \
$(test-srcs) $(others) \
$(sysdep-others)) \
$(addsuffix .out,$(tests) $(xtests) \
$(test-srcs)) \
$(addsuffix .test-result,$(tests) \
$(xtests) \
$(test-srcs)))
-rm -f $(addprefix $(objpfx),$(extra-objs) $(extra-test-objs) \
$(install-lib) $(install-lib.so) \
$(install-lib.so:%.so=%_pic.a))
-rm -f core
-rm -f $(objpfx)rtld-*.os
$(rmobjs)
define rmobjs
$(foreach o,$(object-suffixes-for-libc),
-rm -f $(objpfx)stamp$o $(o-objects))
endef
# Also remove the dependencies and generated source files.
common-clean: common-mostlyclean
-rm -f $(addprefix $(objpfx),$(generated))
-rm -f $(objpfx)*.d $(objpfx)*.dt
-rm -fr $(addprefix $(objpfx),$(generated-dirs))
-rm -f $(addprefix $(common-objpfx),$(common-generated))
-rm -f $(gen-as-const-headers:%.sym=$(common-objpfx)%.h)
# Produce a file `stubs' which contains `#define __stub_FUNCTION'
# for each function which is a stub.
ifdef objpfx
.PHONY: stubs # The parent Makefile calls this target.
stubs: $(objpfx)stubs
endif
objs-for-stubs := $(foreach o,$(object-suffixes-for-libc),$(o-objects)) \
$(addprefix $(objpfx),$(extra-objs))
$(objpfx)stubs: $(objs-for-stubs)
ifneq (,$(strip $(objs-for-stubs)))
(cd $(objpfx).; $(OBJDUMP) -h $(patsubst $(objpfx)%,%,$^)) | \
$(AWK) '/\.gnu\.glibc-stub\./ { \
sub(/\.gnu\.glibc-stub\./, "", $$2); \
stubs[$$2] = 1; } \
END { for (s in stubs) print "#define __stub_" s }' > $@T
mv -f $@T $@
else
> $@
endif
ifneq (,$(strip $(gpl2lgpl)))
ifneq (,$(wildcard $(..)gpl2lgpl.sed))
# Snarf from the master source and frob the copying notice.
$(gpl2lgpl): %: $(..)gpl2lgpl.sed /home/gd/gnu/lib/%
sed -f $^ > $@-tmp
# So I don't edit them by mistake.
chmod a-w $@-tmp
mv -f $@-tmp $@
endif
endif
# Local Variables:
# mode: makefile
# End:
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