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glibc/Makerules
Brooks Moses 5f855e3598 Fix erroneous (and circular) implied pattern rule for linkobj/libc.so. 
[BZ #15915] As described in the bug, the pattern rule for lib%.so files
in Makerules includes linkobj/libc.so as a dependency.  However, the
explicit rule for linkobj/libc.so is in the top-level Makefile.

Thus, the subdirectory makefiles that include Makerules end up with an
erroneous makefile pattern rule for linkobj/libc.so that includes
itself as a dependency.  The result is make warnings whenever rules
for other .so files are resolved -- and, on occasion, actual makefile
failures when a race condition causes the implicit rule to actually be
used.

This patch moves the explicit rules for linkobj/libc.so into Makerules
to clear up this problem.  It also elaborates a couple of comments
that I'd initially found confusing.
2013-10-03 10:38:14 -07:00

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# Copyright (C) 1991-2013 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 $(AWK) -v oldest_abi=$(oldest-abi) -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 += $(common-objpfx)libc-abis.h
endif # avoid-generated
# Make sure the subdirectory for object files gets created.
ifdef objpfx
ifeq (,$(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
# 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); $$(compile-command.c)
endef
object-suffixes-left := $(all-object-suffixes)
include $(o-iterator)
endif
# Generate version maps, but wait until sysdep-subdirs is known
ifeq ($(sysd-sorted-done),t)
ifeq ($(build-shared),yes)
-include $(common-objpfx)sysd-versions
$(addprefix $(common-objpfx),$(version-maps)): $(common-objpfx)sysd-versions
common-generated += $(version-maps)
postclean-generated += sysd-versions Versions.all abi-versions.h \
Versions.def.v.i Versions.def.v Versions.v.i Versions.v
ifndef avoid-generated
ifneq ($(sysd-versions-subdirs),$(sorted-subdirs) $(config-sysdirs))
sysd-versions-force = FORCE
FORCE:
endif
# See %.v/%.v.i implicit rules in Makeconfig.
$(common-objpfx)Versions.def.v.i: $(..)Versions.def \
$(wildcard $(add-ons:%=$(..)%/Versions.def))
$(common-objpfx)Versions.all: $(..)scripts/firstversions.awk \
$(common-objpfx)soversions.i \
$(common-objpfx)Versions.def.v
{ while read which lib version setname; do \
test x"$$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)) \
$(common-objpfx)abi-versions.h \
$(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) $(elfobjdir)/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 $(elfobjdir)/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) $(+interp) $(link-libc-deps)
$(build-shlib) $(link-libc-args)
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 = .);\
/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)
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)
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: $(elfobjdir)/soinit.os \
$(common-objpfx)libc_pic.os$(libc_pic_clean) \
$(elfobjdir)/sofini.os \
$(elfobjdir)/interp.os \
$(elfobjdir)/ld.so \
$(shlib-lds)
$(build-shlib)
$(common-objpfx)linkobj/libc.so: $(elfobjdir)/soinit.os \
$(common-objpfx)linkobj/libc_pic.a \
$(elfobjdir)/sofini.os \
$(elfobjdir)/interp.os \
$(elfobjdir)/ld.so \
$(shlib-lds)
$(build-shlib)
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)))
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 := $(common-objpfx)elf/sln
symbolic-link-list := $(common-objpfx)elf/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:=.c) $(all-nonlib:=.cc)
lib := nonlib
include $(patsubst %,$(..)cppflags-iterator.mk,$(cpp-srcs-left))
endif
# The include magic above causes those files to use this variable for flags.
CPPFLAGS-nonlib = -DNOT_IN_libc=1
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 $@
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)
check-abi-%: $(common-objpfx)config.make %.abilist $(objpfx)%.symlist
$(check-abi)
check-abi-%: $(common-objpfx)config.make %.abilist $(common-objpfx)%.symlist
$(check-abi)
define check-abi
diff -p -U 0 $(filter %.abilist,$^) $(filter %.symlist,$^)
endef
update-abi-%: $(objpfx)%.symlist %.abilist
$(update-abi)
update-abi-%: $(common-objpfx)%.symlist %.abilist
$(update-abi)
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
.PHONY: update-abi check-abi
update-abi: $(patsubst %.so,update-abi-%,$(install-lib.so-versioned))
check-abi: $(patsubst %.so,check-abi-%,$(install-lib.so-versioned))
ifdef subdir
subdir_check-abi: check-abi
subdir_update-abi: update-abi
else
check-abi: subdir_check-abi
update-abi: subdir_update-abi
endif
ifeq ($(subdir),elf)
check-abi: check-abi-libc
update-abi: update-abi-libc
common-generated += libc.symlist
endif
ifeq ($(build-shared),yes)
ifdef subdir
tests: check-abi
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)))
# 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)))
-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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