-# Copyright (C) 1991-2015 Free Software Foundation, Inc.
+# Copyright (C) 1991-2024 Free Software Foundation, Inc.
+# Copyright The GNU Toolchain Authors.
# This file is part of the GNU C Library.
# The GNU C Library is free software; you can redistribute it and/or
# 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/>.
+# <https://www.gnu.org/licenses/>.
#
# Makefile configuration options for the GNU C library.
common-objpfx = $(objdir)/
common-objdir = $(objdir)
else
-objdir must be defined by the build-directory Makefile.
+$(error objdir must be defined by the build-directory Makefile)
+endif
+
+# Did we request 'make -s' run? "yes" or "no".
+# Starting from make-4.4 MAKEFLAGS now contains long
+# options like '--shuffle'. To detect presence of 's'
+# we pick first word with short options. Long options
+# are guaranteed to come after whitespace. We use '-'
+# prefix to always have a word before long options
+# even if no short options were passed.
+# Typical MAKEFLAGS values to watch for:
+# "rs --shuffle=42" (silent)
+# " --shuffle" (not silent)
+ifeq ($(findstring s, $(firstword -$(MAKEFLAGS))),)
+silent-make := no
+else
+silent-make := yes
endif
# Root of the sysdeps tree.
include $(common-objpfx)config.make
# What flags to give to sources which call user provided callbacks
-uses-callbacks = $(exceptions)
+uses-callbacks = -fexceptions
# What flags to give to tests which test stack alignment
stack-align-test-flags =
# `configure' writes a definition of `config-sysdirs' in `config.make'.
sysdirs := $(foreach D,$(config-sysdirs),$(firstword $(filter /%,$D) $(..)$D))
-# Add-ons that contribute sysdeps trees get added to the include list
-# after sysdeps/generic. This makes #include <sysdeps/...> work right
-# to find specific add-on files without assuming the add-on directory name.
-# It also means that headers can go into an add-on's base directory
-# instead of the add-on needing a sysdeps/generic of its own.
-sysdeps-srcdirs := $(foreach add-on,$(sysdeps-add-ons),\
- $(firstword $(filter /%,$(add-on)) \
- $(..)$(add-on)))
-+sysdep_dirs = $(sysdirs) $(sysdeps-srcdirs)
++sysdep_dirs = $(sysdirs)
ifdef objdir
+sysdep_dirs := $(objdir) $(+sysdep_dirs)
endif
$(..)config.make.in $(..)config.h.in
cd $(<D); $(SHELL) $(<F)
-# Find all the add-on and sysdeps configure fragments, to make sure we
-# re-run configure when any of them changes.
+# Find all the sysdeps configure fragments, to make sure we re-run
+# configure when any of them changes.
$(common-objpfx)config.status: $(..)version.h $(..)configure \
$(foreach dir,$(sysdirs),\
$(wildcard $(dir)/Implies) \
$(firstword $(wildcard \
$(addprefix $(dir)/,configure configure.ac))))) \
$(patsubst %.ac,%,\
- $(wildcard $(..)sysdeps/*/preconfigure $(..)sysdeps/*/preconfigure.ac)) \
- $(patsubst %.ac,%,\
- $(foreach add-on,$(add-ons),\
- $(firstword $(wildcard \
- $(addprefix $(firstword $(filter /%,$(add-on)) $(..)$(add-on))/,\
- configure configure.ac))) \
- $(wildcard $(addprefix $(firstword $(filter /%,$(add-on)) $(..)$(add-on))/,\
- sysdeps/*/preconfigure sysdeps/*/preconfigure.ac))))
+ $(wildcard $(..)sysdeps/*/preconfigure $(..)sysdeps/*/preconfigure.ac))
@cd $(@D); if test -f $(@F); then exec $(SHELL) $(@F) --recheck; else \
echo The GNU C library has not been configured. >&2; \
echo Run \`configure\' to configure it before building. >&2; \
endif
inst_zonedir = $(install_root)$(zonedir)
-# Where to install the locale files.
-ifndef localedir
-localedir = $(libdir)/locale
+# Where to install the compiled binary locale archive and compiled
+# binary locale files.
+ifndef complocaledir
+complocaledir = $(libdir)/locale
endif
-inst_localedir = $(install_root)$(localedir)
+inst_complocaledir = $(install_root)$(complocaledir)
# Where to install the message catalog data files (which are
# machine-independent).
-ifndef msgcatdir
-msgcatdir = $(datadir)/locale
+ifndef localedir
+localedir = $(datadir)/locale
endif
-inst_msgcatdir = $(install_root)$(msgcatdir)
+inst_localedir = $(install_root)$(localedir)
# Where to install the locale charmap source files.
ifndef i18ndir
endif
# Flags to pass the C compiler when assembling preprocessed assembly code
-# (`.S' files). On some systems the assembler doesn't understand the `#' line
-# directives the preprocessor produces. If you have troubling compiling
-# assembly code, try using -P here to suppress these directives.
+# (`.S' files).
ifndef asm-CPPFLAGS
asm-CPPFLAGS =
endif
-as-needed := -Wl,--as-needed
-no-as-needed := -Wl,--no-as-needed
-
# Must be supported by the linker.
no-whole-archive = -Wl,--no-whole-archive
whole-archive = -Wl,--whole-archive
static-start-installed-name = $(start-installed-name)
endif
-ifeq (yesyes,$(build-shared)$(have-z-combreloc))
-combreloc-LDFLAGS = -Wl,-z,combreloc
-LDFLAGS.so += $(combreloc-LDFLAGS)
-LDFLAGS-rtld += $(combreloc-LDFLAGS)
+ifeq (yes,$(enable-static-pie))
+# Link with rcrt1.o, instead of crt1.o, to call _dl_relocate_static_pie
+# to relocate static PIE.
+real-static-start-installed-name = r$(static-start-installed-name)
+else
+real-static-start-installed-name = $(static-start-installed-name)
endif
relro-LDFLAGS = -Wl,-z,relro
LDFLAGS.so += $(relro-LDFLAGS)
LDFLAGS-rtld += $(relro-LDFLAGS)
-ifeq (yes,$(have-hash-style))
-# For the time being we unconditionally use 'both'. At some time we
-# should declare statically linked code as 'out of luck' and compile
-# with --hash-style=gnu only.
-hashstyle-LDFLAGS = -Wl,--hash-style=both
-LDFLAGS.so += $(hashstyle-LDFLAGS)
-LDFLAGS-rtld += $(hashstyle-LDFLAGS)
+# Linker options to enable and disable DT_RELR.
+ifeq ($(have-dt-relr),yes)
+dt-relr-ldflag = -Wl,-z,pack-relative-relocs
+no-dt-relr-ldflag = -Wl,-z,nopack-relative-relocs
+else
+dt-relr-ldflag =
+no-dt-relr-ldflag =
+endif
+
+ifeq (no,$(build-pie-default))
+pie-default = $(no-pie-ccflag)
+else # build-pie-default
+pic-default = -DPIC
+# Compile libc.a and libc_p.a with -fPIE/-fpie for static PIE.
+pie-default = $(pie-ccflag)
+
+ifeq (yes,$(enable-static-pie))
+static-pie-dt-relr-ldflag = $(dt-relr-ldflag)
+ifeq (yes,$(have-static-pie))
+static-pie-ldflag = -static-pie
+else
+# Static PIE can't have dynamic relocations in read-only segments since
+# static PIE is mapped into memory by kernel. --eh-frame-hdr is needed
+# for PIE to support exception.
+static-pie-ldflag = -Wl,-pie,--no-dynamic-linker,--eh-frame-hdr,-z,text
+endif # have-static-pie
+endif # enable-static-pie
+endif # build-pie-default
+
+# If lazy relocations are disabled, add the -z now flag. Use
+# LDFLAGS-lib.so instead of LDFLAGS.so, to avoid adding the flag to
+# test modules.
+ifeq ($(bind-now),yes)
+LDFLAGS-lib.so += -Wl,-z,now
+# Extra flags for dynamically linked non-test main programs.
+link-extra-flags += -Wl,-z,now
endif
# Command to run after every final link (executable or shared object).
after-link =
endif
+# Additional libraries to link into every test.
+link-extra-libs-tests = $(libsupport)
+
# Command for linking PIE programs with the C library.
ifndef +link-pie
-+link-pie-before-libc = $(CC) -pie -Wl,-O1 -nostdlib -nostartfiles -o $@ \
++link-pie-before-inputs = $(if $($(@F)-no-pie),$(no-pie-ldflag),-pie) \
+ $(if $($(@F)-no-dt-relr),$(no-dt-relr-ldflag),$(dt-relr-ldflag)) \
+ -Wl,-O1 -nostdlib -nostartfiles \
$(sysdep-LDFLAGS) $(LDFLAGS) $(LDFLAGS-$(@F)) \
- $(combreloc-LDFLAGS) $(relro-LDFLAGS) $(hashstyle-LDFLAGS) \
- $(addprefix $(csu-objpfx),S$(start-installed-name)) \
- $(+preinit) $(+prectorS) \
+ $(relro-LDFLAGS) $(hashstyle-LDFLAGS) \
+ $(firstword $(CRT-$(@F)) $(csu-objpfx)S$(start-installed-name)) \
+ $(+preinit) $(+prectorS)
++link-pie-before-libc = -o $@ $(+link-pie-before-inputs) \
$(filter-out $(addprefix $(csu-objpfx),start.o \
S$(start-installed-name))\
$(+preinit) $(link-extra-libs) \
$(link-extra-libs)
+link-pie-after-libc = $(+postctorS) $(+postinit)
define +link-pie
-$(+link-pie-before-libc) $(rtld-LDFLAGS) $(link-libc) $(+link-pie-after-libc)
+$(CC) $(link-libc-rpath-link) $(+link-pie-before-libc) $(rtld-LDFLAGS) \
+ $(link-extra-flags) $(link-libc) $(+link-pie-after-libc)
$(call after-link,$@)
endef
define +link-pie-tests
-$(+link-pie-before-libc) $(rtld-tests-LDFLAGS) $(link-libc-tests) \
- $(+link-pie-after-libc)
+$(CC) $(+link-pie-before-libc) $(rtld-tests-LDFLAGS) $(link-libc-tests) \
+ $(+link-pie-after-libc)
+$(call after-link,$@)
+endef
+define +link-pie-printers-tests
+$(CC) $(+link-pie-before-libc) $(built-rtld-LDFLAGS) \
+ $(link-libc-printers-tests) $(+link-pie-after-libc)
$(call after-link,$@)
endef
endif
# Command for statically linking programs with the C library.
ifndef +link-static
-+link-static-before-libc = $(CC) -nostdlib -nostartfiles -static -o $@ \
++link-static-before-inputs = -nostdlib -nostartfiles -static \
+ $(if $($(@F)-no-pie),$(no-pie-ldflag),$(static-pie-ldflag)) \
+ $(if $($(@F)-no-dt-relr),$(no-dt-relr-ldflag),$(static-pie-dt-relr-ldflag)) \
$(sysdep-LDFLAGS) $(LDFLAGS) $(LDFLAGS-$(@F)) \
- $(addprefix $(csu-objpfx),$(static-start-installed-name)) \
- $(+preinit) $(+prectorT) \
+ $(firstword $(CRT-$(@F)) $(csu-objpfx)$(real-static-start-installed-name)) \
+ $(+preinit) $(+prectorT)
++link-static-before-libc = -o $@ $(+link-static-before-inputs) \
$(filter-out $(addprefix $(csu-objpfx),start.o \
$(start-installed-name))\
$(+preinit) $(link-extra-libs-static) \
$(link-extra-libs-static)
+link-static-after-libc = $(+postctorT) $(+postinit)
define +link-static
-$(+link-static-before-libc) $(link-libc-static) $(+link-static-after-libc)
+$(CC) $(+link-static-before-libc) $(link-extra-flags) $(link-libc-static) \
+ $(+link-static-after-libc)
$(call after-link,$@)
endef
define +link-static-tests
-$(+link-static-before-libc) $(link-libc-static-tests) $(+link-static-after-libc)
+$(CC) $(+link-static-before-libc) $(link-libc-static-tests) \
+ $(+link-static-after-libc)
$(call after-link,$@)
endef
endif
# Commands for linking programs with the C library.
ifndef +link
ifeq (yes,$(build-shared))
-+link-before-libc = $(CC) -nostdlib -nostartfiles -o $@ \
+ifeq (yes,$(cc-pie-default))
+no-pie-ldflag = -no-pie
+endif
+ifeq (yes,$(build-pie-default))
++link = $(+link-pie)
++link-tests = $(+link-pie-tests)
++link-tests-before-inputs = $(+link-pie-before-inputs) $(rtld-tests-LDFLAGS)
++link-tests-after-inputs = $(link-libc-tests) $(+link-pie-after-libc)
++link-printers-tests = $(+link-pie-printers-tests)
+else # not build-pie-default
++link-before-inputs = -nostdlib -nostartfiles $(no-pie-ldflag) \
$(sysdep-LDFLAGS) $(LDFLAGS) $(LDFLAGS-$(@F)) \
- $(combreloc-LDFLAGS) $(relro-LDFLAGS) $(hashstyle-LDFLAGS) \
- $(addprefix $(csu-objpfx),$(start-installed-name)) \
- $(+preinit) $(+prector) \
+ $(relro-LDFLAGS) $(hashstyle-LDFLAGS) \
+ $(firstword $(CRT-$(@F)) $(csu-objpfx)$(start-installed-name)) \
+ $(+preinit) $(+prector)
++link-before-libc = -o $@ $(+link-before-inputs) \
$(filter-out $(addprefix $(csu-objpfx),start.o \
$(start-installed-name))\
$(+preinit) $(link-extra-libs) \
$(link-extra-libs)
+link-after-libc = $(+postctor) $(+postinit)
define +link
-$(+link-before-libc) $(rtld-LDFLAGS) $(link-libc) $(+link-after-libc)
+$(CC) $(link-libc-rpath-link) $(+link-before-libc) $(rtld-LDFLAGS) \
+ $(link-extra-flags) $(link-libc) $(+link-after-libc)
$(call after-link,$@)
endef
++link-tests-before-inputs = $(+link-before-inputs) $(rtld-tests-LDFLAGS)
++link-tests-after-inputs = $(link-libc-tests) $(+link-after-libc)
define +link-tests
-$(+link-before-libc) $(rtld-tests-LDFLAGS) $(link-libc-tests) \
+$(CC) $(+link-before-libc) $(rtld-tests-LDFLAGS) $(link-libc-tests) \
$(+link-after-libc)
$(call after-link,$@)
endef
-else
+define +link-printers-tests
+$(CC) $(+link-before-libc) $(built-rtld-LDFLAGS) $(link-libc-printers-tests) \
+ $(+link-after-libc)
+$(call after-link,$@)
+endef
+endif # build-pie-default
+else # build-static
+link = $(+link-static)
+link-tests = $(+link-static-tests)
-endif
-endif
++link-tests-before-inputs = $(+link-static-before-inputs)
++link-tests-after-inputs = $(link-libc-static-tests) $(+link-static-after-libc)
++link-printers-tests = $(+link-static-tests)
+endif # build-shared
+endif # +link
+
+# The pretty printer test programs need to be compiled without optimizations
+# so they won't confuse gdb. We could use either the 'GCC optimize' pragma
+# or the 'optimize' function attribute to achieve this; however, at least on
+# ARM, gcc always produces different debugging symbols when invoked with
+# a -O greater than 0 than when invoked with -O0, regardless of anything else
+# we're using to suppress optimizations. Therefore, we need to explicitly pass
+# -O0 to it through CFLAGS. As a result, any fortification needs to be disabled
+# as it needs -O greater than 0.
+# Additionally, the build system will try to -include $(common-objpfx)/config.h
+# when compiling the tests, which will throw an error if some special macros
+# (such as __OPTIMIZE__ and IS_IN_build) aren't defined. To avoid this, we
+# tell gcc to define IS_IN_build.
+CFLAGS-printers-tests := -O0 -ggdb3 -DIS_IN_build $(no-fortify-source)
+
ifeq (yes,$(build-shared))
+# These indicate whether to link using the built ld.so or the installed one.
+installed-rtld-LDFLAGS = -Wl,-dynamic-linker=$(rtlddir)/$(rtld-installed-name)
+built-rtld-LDFLAGS = -Wl,-dynamic-linker=$(elf-objpfx)ld.so
+
ifndef rtld-LDFLAGS
-rtld-LDFLAGS = -Wl,-dynamic-linker=$(rtlddir)/$(rtld-installed-name)
+rtld-LDFLAGS = $(installed-rtld-LDFLAGS)
endif
+
ifndef rtld-tests-LDFLAGS
ifeq (yes,$(build-hardcoded-path-in-tests))
-rtld-tests-LDFLAGS = -Wl,-dynamic-linker=$(elf-objpfx)ld.so
+rtld-tests-LDFLAGS = $(built-rtld-LDFLAGS)
else
-rtld-tests-LDFLAGS = $(rtld-LDFLAGS)
-endif
-endif
-endif
+rtld-tests-LDFLAGS = $(installed-rtld-LDFLAGS)
+endif # build-hardcoded-path-in-tests
+endif # rtld-tests-LDFLAGS
+
+endif # build-shared
+
ifndef link-libc
ifeq (yes,$(build-shared))
# We need the versioned name of libc.so in the deps of $(others) et al
# so that the symlink to libc.so is created before anything tries to
# run the linked programs.
+link-libc-rpath = -Wl,-rpath=$(rpath-link)
link-libc-rpath-link = -Wl,-rpath-link=$(rpath-link)
+
+# For programs which are not tests, $(link-libc-rpath-link) is added
+# directly in $(+link), $(+link-pie) above, so that -Wl,-rpath-link
+# comes before the expansion of LDLIBS-* and affects libraries added
+# there. For shared objects, -Wl,-rpath-link is added via
+# $(build-shlib-helper) and $(build-module-helper) in Makerules (also
+# before the expansion of LDLIBS-* variables).
+
+# Tests use -Wl,-rpath instead of -Wl,-rpath-link for
+# build-hardcoded-path-in-tests.
ifeq (yes,$(build-hardcoded-path-in-tests))
-link-libc-tests-rpath-link = -Wl,-rpath=$(rpath-link)
+link-libc-tests-rpath-link = $(link-libc-rpath)
+link-test-modules-rpath-link = $(link-libc-rpath)
else
link-libc-tests-rpath-link = $(link-libc-rpath-link)
-endif
-link-libc-before-gnulib = $(common-objpfx)libc.so$(libc.so-version) \
- $(common-objpfx)$(patsubst %,$(libtype.oS),c) \
- $(as-needed) $(elf-objpfx)ld.so \
- $(no-as-needed)
-link-libc = $(link-libc-rpath-link) $(link-libc-before-gnulib) $(gnulib)
+link-test-modules-rpath-link =
+endif # build-hardcoded-path-in-tests
+
+link-libc-between-gnulib = $(common-objpfx)libc.so$(libc.so-version) \
+ $(common-objpfx)$(patsubst %,$(libtype.oS),c) \
+ -Wl,--as-needed $(elf-objpfx)ld.so \
+ -Wl,--no-as-needed
+link-libc = $(link-libc-between-gnulib) $(gnulib)
+
+link-libc-tests-after-rpath-link = $(gnulib-tests) $(link-libc-between-gnulib) $(gnulib-tests)
link-libc-tests = $(link-libc-tests-rpath-link) \
- $(link-libc-before-gnulib) $(gnulib-tests)
+ $(link-libc-tests-after-rpath-link)
+# Pretty printer test programs always require rpath instead of rpath-link.
+link-libc-printers-tests = $(link-libc-rpath) \
+ $(link-libc-tests-after-rpath-link)
+
# This is how to find at build-time things that will be installed there.
-rpath-dirs = math elf dlfcn nss nis rt resolv crypt
+rpath-dirs = math elf dlfcn nss nis rt resolv mathvec support
rpath-link = \
$(common-objdir):$(subst $(empty) ,:,$(patsubst ../$(subdir),.,$(rpath-dirs:%=$(common-objpfx)%)))
-else
+else # build-static
link-libc = $(common-objpfx)libc.a $(otherlibs) $(gnulib) $(common-objpfx)libc.a $(gnulib)
link-libc-tests = $(common-objpfx)libc.a $(otherlibs) $(gnulib-tests) $(common-objpfx)libc.a $(gnulib-tests)
-endif
-endif
+endif # build-shared
+endif # link-libc
# Differences in the linkers on the various platforms.
LDFLAGS-rpath-ORIGIN = -Wl,-rpath,'$$ORIGIN'
+prectorS = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtbeginS.o`
+postctorS = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtendS.o`
# Variants of the two previous definitions for statically linking programs.
-+prectorT = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtbeginT.o`
-+postctorT = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtend.o`
-+interp = $(addprefix $(elf-objpfx),interp.os)
+static-prector = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtbeginT.o`
+static-postctor = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtend.o`
+ifeq (yes,$(enable-static-pie))
+# Static PIE must use PIE variants.
++prectorT = $(if $($(@F)-no-pie),$(static-prector),$(+prectorS))
++postctorT = $(if $($(@F)-no-pie),$(static-postctor),$(+postctorS))
+else
++prectorT = $(static-prector)
++postctorT =$(static-postctor)
+endif
csu-objpfx = $(common-objpfx)csu/
elf-objpfx = $(common-objpfx)elf/
# the second dependency of the makefile target in which
# $(host-built-program-cmd) is used.
host-built-program-cmd = $(run-via-rtld-prefix) $(built-program-file)
+# $(ld-library-path) is the common content to be set in LD_LIBRARY_PATH
+# for running static binaries that may load dynamic objects.
+ld-library-path = $(objpfx):$(common-objpfx)$(addprefix :,$(sysdep-ld-library-path))
ifndef LD
LD := ld -X
endif
# Extra flags to pass to GCC.
-ifeq ($(all-warnings),yes)
-+gccwarn := -Wall -Wwrite-strings -Winline -Wcast-qual -Wbad-function-cast -Wmissing-noreturn -Wmissing-prototypes -Wmissing-declarations -Wcomment -Wcomments -Wtrigraphs -Wsign-compare -Wfloat-equal -Wmultichar
-else
-+gccwarn := -Wall -Wwrite-strings -Winline
-endif
-+gccwarn += -Wundef
++gccwarn := -Wall -Wwrite-strings -Wundef
ifeq ($(enable-werror),yes)
-+gccwarn += -Werror -Wno-error=undef
++gccwarn += -Werror
endif
-+gccwarn-c = -Wstrict-prototypes
++gccwarn-c = -Wstrict-prototypes -Wold-style-definition
# We do not depend on the address of constants in different files to be
# actually different, so allow the compiler to merge them all.
# disable any optimization that assume default rounding mode.
+math-flags = -frounding-math
-# This is the program that generates makefile dependencies from C source files.
-# The -MP flag tells GCC >= 3.2 (which we now require) to produce dummy
-# targets for headers so that removed headers don't break the build.
-ifndef +mkdep
-+mkdep = $(CC) -M -MP
+# Logically only "libnldbl", "nonlib" and "testsuite" should be using
+# -fno-math-errno. However due to GCC bug #88576, only "libm" can use
+# -fno-math-errno.
++extra-math-flags = $(if $(filter libm,$(in-module)),-fno-math-errno,-fmath-errno)
+
+# Use 64 bit time_t support for installed programs
+installed-modules = nonlib nscd ldconfig locale_programs \
+ iconvprogs libnss_files libnss_compat libnss_db libnss_hesiod \
+ libutil libpcprofile libnsl
++extra-time-flags = $(if $(filter $(installed-modules),\
+ $(in-module)),-D_TIME_BITS=64 -D_FILE_OFFSET_BITS=64)
+
+# We might want to compile with some stack-protection flag.
+ifneq ($(stack-protector),)
++stack-protector=$(stack-protector)
+endif
+
+# Some routines are unsafe to build with stack-protection since they're called
+# before the stack check guard is set up. Provide a way to disable stack
+# protector. The first argument is the extension (.o, .os, .oS) and the second
+# is a list of routines that this path should be applied to.
+define elide-stack-protector
+$(if $(filter $(@F),$(patsubst %,%$(1),$(2))), $(no-stack-protector))
+endef
+
+# We might want to compile with fortify-source
+ifneq ($(fortify-source),)
++fortify-source=$(fortify-source)
endif
+# Some routine can't be fortified like the ones used by fortify
+define elide-fortify-source
+$(if $(filter $(@F),$(patsubst %,%$(1),$(2))), $(no-fortify-source))
+endef
+
# The program that makes Emacs-style TAGS files.
ETAGS := etags
# umpteen zillion filenames along with it (we use `...' instead)
# but we don't want this echoing done when the user has said
# he doesn't want to see commands echoed by using -s.
-ifneq "$(findstring s,$(MAKEFLAGS))" "" # if -s
+ifeq ($(silent-make),yes) # if -s
+cmdecho := echo >/dev/null
else # not -s
+cmdecho := echo
+cflags := $(default_cflags)
endif # $(+cflags) == ""
-+cflags += $(cflags-cpu) $(+gccwarn) $(+merge-constants) $(+math-flags)
+# Force building with -fno-common because hidden_def, compat_symbol
+# and other constructs do not work for common symbols (and would
+# otherwise require specifying __attribute__ ((nocommon)) on a
+# case-by-case basis).
++cflags += $(cflags-cpu) $(+gccwarn) $(+merge-constants) $(+math-flags) \
+ $(+stack-protector) -fno-common
+gcc-nowarn := -w
-# Don't duplicate options if we inherited variables from the parent.
-+cflags := $(sort $(+cflags))
+# We must filter out elf because the early bootstrap of the dynamic loader
+# cannot be fortified. Likewise we exclude dlfcn because it is entangled
+# with the loader. We must filter out csu because early startup, like the
+# loader, cannot be fortified. Lastly debug is the fortification routines
+# themselves and they cannot be fortified.
+do-fortify = $(filter-out elf dlfcn csu debug,$(subdir))
+ifeq ($(do-fortify),$(subdir))
++cflags += $(+fortify-source)
+else
++cflags += $(no-fortify-source)
+endif
# Each sysdeps directory can contain header files that both will be
# used to compile and will be installed. Each can also contain an
libio-include = -I$(..)libio
# List of non-library modules that we build.
-built-modules = iconvprogs iconvdata ldconfig lddlibc4 libmemusage \
- libSegFault libpcprofile librpcsvc locale-programs \
- memusagestat nonlib nscd extramodules libnldbl
-
-# We don't include libc-modules.h when these targets are being built. These
-# targets don't (and will likely never need to) use the IS_IN facility. In
-# fact, shlib-versions should not use it because that will create a circular
-# dependency as libc-modules.h is generated from shlib-versions.
-skip-module-cppflags = shlib-versions.v.i Versions.v.i
+built-modules = iconvprogs iconvdata ldconfig libmemusage \
+ libpcprofile librpcsvc locale-programs \
+ memusagestat nonlib nscd extramodules libnldbl libsupport \
+ testsuite testsuite-internal
in-module = $(subst -,_,$(firstword $(libof-$(basename $(@F))) \
$(libof-$(<F)) \
$(libof-$(@F)) \
libc))
+# Build ld.so, libc.so and libpthread.so with -ftls-model=initial-exec
+tls-model = $(if $(filter libpthread rtld \
+ libc,$(in-module)),-ftls-model=initial-exec,)
+
module-cppflags-real = -include $(common-objpfx)libc-modules.h \
-DMODULE_NAME=$(in-module)
-# We don't need libc-modules.h and the MODULE_NAME definition for
-# shlib-version.v.i.
-module-cppflags = $(if $(filter $(@F),$(skip-module-cppflags)), \
- ,$(module-cppflags-real))
+# We don't need libc-modules.h and the MODULE_NAME definition for .v.i
+# files. These targets don't (and will likely never need to) use the IS_IN
+# facility. In fact, shlib-versions should not use it because that will
+# create a circular dependency as libc-modules.h is generated from
+# shlib-versions.
+module-cppflags = $(if $(filter %.mk.i %.v.i,$(@F)),,$(module-cppflags-real))
# These are the variables that the implicit compilation rules use.
# Note that we can't use -std=* in CPPFLAGS, because it overrides
# the implicit -lang-asm and breaks cpp behavior for .S files--notably
# it causes cpp to stop predefining __ASSEMBLER__.
-CPPFLAGS = $(config-extra-cppflags) $(CPPUNDEFS) $(CPPFLAGS-config) \
+CPPFLAGS = $(config-extra-cppflags) $(CPPFLAGS-config) \
$($(subdir)-CPPFLAGS) \
$(+includes) $(defines) $(module-cppflags) \
-include $(..)include/libc-symbols.h $(sysdep-CPPFLAGS) \
$(CPPFLAGS-$(suffix $@)) \
$(foreach lib,$(libof-$(basename $(@F))) \
$(libof-$(<F)) $(libof-$(@F)),$(CPPFLAGS-$(lib))) \
- $(CPPFLAGS-$(<F)) $(CPPFLAGS-$(@F)) $(CPPFLAGS-$(basename $(@F)))
-override CFLAGS = -std=gnu99 $(gnu89-inline-CFLAGS) $(config-extra-cflags) \
+ $(CPPFLAGS-$(<F)) $(CPPFLAGS-$(@F)) $(CPPFLAGS-$(basename $(@F))) \
+ -DTOP_NAMESPACE=glibc
+
+override CFLAGS = -std=gnu11 -fgnu89-inline $(config-extra-cflags) \
$(filter-out %frame-pointer,$(+cflags)) $(+gccwarn-c) \
+ $(+extra-math-flags) $(+extra-time-flags) \
$(sysdep-CFLAGS) $(CFLAGS-$(suffix $@)) $(CFLAGS-$(<F)) \
- $(CFLAGS-$(@F)) \
+ $(CFLAGS-$(@F)) $(tls-model) \
$(foreach lib,$(libof-$(basename $(@F))) \
$(libof-$(<F)) $(libof-$(@F)),$(CFLAGS-$(lib)))
-override CXXFLAGS = $(c++-sysincludes) \
+# Use our copies of cstdlib and cmath.
+override CXXFLAGS = -I$(common-objpfx) $(c++-sysincludes) \
$(filter-out %frame-pointer,$(+cflags)) $(sysdep-CFLAGS) \
$(CFLAGS-$(suffix $@)) $(CFLAGS-$(<F)) $(CFLAGS-$(@F))
# The compilation rules use $(CPPFLAGS-${SUFFIX}) and $(CFLAGS-${SUFFIX})
# to pass different flags for each flavor.
libtypes = $(foreach o,$(object-suffixes-for-libc),$(libtype$o))
-all-object-suffixes := .o .os .op .og .oS
+# .op may be added to all-object-suffixes below.
+all-object-suffixes := .o .os .oS
object-suffixes :=
CPPFLAGS-.o = $(pic-default)
-CFLAGS-.o = $(filter %frame-pointer,$(+cflags))
+# libc.a must be compiled with -fPIE/-fpie for static PIE.
+CFLAGS-.o = $(filter %frame-pointer,$(+cflags)) $(pie-default)
+CFLAGS-.o += $(call elide-fortify-source,.o,$(routines_no_fortify))
+CFLAGS-.o += $(call elide-fortify-source,_chk.o,$(routines_no_fortify))
libtype.o := lib%.a
object-suffixes += .o
ifeq (yes,$(build-shared))
# Under --enable-shared, we will build a shared library of PIC objects.
# The PIC object files are named foo.os.
object-suffixes += .os
-CPPFLAGS-.os = -DPIC -DSHARED
+pic-cppflags = -DPIC -DSHARED
+CPPFLAGS-.os = $(pic-cppflags)
CFLAGS-.os = $(filter %frame-pointer,$(+cflags)) $(pic-ccflag)
+CFLAGS-.os += $(call elide-fortify-source,.os,$(routines_no_fortify))
+CFLAGS-.os += $(call elide-fortify-source,_chk.os,$(routines_no_fortify))
libtype.os := lib%_pic.a
# This can be changed by a sysdep makefile
pic-ccflag = -fPIC
PIC-ccflag = -fPIC
endif
# This can be changed by a sysdep makefile
-pie-ccflag = -fpie
+pie-ccflag = -fPIE
+no-pie-ccflag = -fno-pie
# This one should always stay like this unless there is a very good reason.
PIE-ccflag = -fPIE
ifeq (yes,$(build-profile))
# Under --enable-profile, we will build a static library of profiled objects.
# The profiled object files are named foo.op.
+all-object-suffixes += .op
object-suffixes += .op
CPPFLAGS-.op = -DPROF $(pic-default)
-CFLAGS-.op = -pg
+# libc_p.a must be compiled with -fPIE/-fpie for static PIE.
+CFLAGS-.op = -pg $(pie-default)
+CFLAGS-.op += $(call elide-fortify-source,.op,$(routines_no_fortify))
+CFLAGS-.op += $(call elide-fortify-source,_chk.op,$(routines_no_fortify))
libtype.op = lib%_p.a
endif
# Must build the routines as PIC, though, because they can end up in (users')
# shared objects. We don't want to use CFLAGS-os because users may, for
# example, make that processor-specific.
-CFLAGS-.oS = $(CFLAGS-.o) $(PIC-ccflag)
+CFLAGS-.oS = $(CFLAGS-.o) $(PIC-ccflag) $(extra-nonshared-cflags)
CPPFLAGS-.oS = $(CPPFLAGS-.o) -DPIC -DLIBC_NONSHARED=1
libtype.oS = lib%_nonshared.a
endif
ifndef ASFLAGS
ASFLAGS := $(filter -g% -fdebug-prefix-map=%,$(CFLAGS))
endif
-ASFLAGS += -Werror=undef $(ASFLAGS-config) $(asflags-cpu)
+override ASFLAGS += -Werror=undef $(ASFLAGS-config) $(asflags-cpu)
ifndef BUILD_CC
BUILD_CC = $(CC)
ifeq ($(sysd-sorted-done),t)
-include $(common-objpfx)soversions.mk
ifndef avoid-generated
-# This lets add-ons give more-specific matches that override defaults
-# in the top-level file.
$(common-objpfx)shlib-versions.v.i: \
$(wildcard $(+sysdep_dirs:=/shlib-versions) \
$(subdir-srcdirs:=/shlib-versions)) \
shlib-versions.v shlib-versions.v.i
before-compile += $(common-objpfx)libc-modules.h
+common-generated += libc-modules.h libc-modules.stmp
ifeq ($(soversions.mk-done),t)
# Generate a header with macro definitions for use with the IS_IN macro.
# These are the possible values for the MODULE_NAME macro defined when building
endif
-common-generated += libc-modules.h libc-modules.stmp
+# Build the tunables list header early since it could be used by any module in
+# glibc.
+before-compile += $(common-objpfx)dl-tunable-list.h
+common-generated += dl-tunable-list.h dl-tunable-list.stmp
+
+$(common-objpfx)dl-tunable-list.h: $(common-objpfx)dl-tunable-list.stmp; @:
+$(common-objpfx)dl-tunable-list.stmp: \
+ $(..)scripts/gen-tunables.awk \
+ $(..)elf/dl-tunables.list \
+ $(wildcard $(subdirs:%=$(..)%/dl-tunables.list)) \
+ $(wildcard $(sysdirs:%=%/dl-tunables.list))
+ $(AWK) -f $^ > ${@:stmp=T}
+ $(move-if-change) ${@:stmp=T} ${@:stmp=h}
+ touch $@
+
+# Dump the GCC macros used by the default compiler flags to a header
+# file, so that they can be inspected when using different compiler
+# flags. Add the GCCMACRO prefix to make these macro names unique.
+$(common-objpfx)gcc-macros.h.in: $(common-objpfx)config.status
+ $(CC) $(CFLAGS) $(CPPFLAGS) -E -dM -x c -o $@ /dev/null
+$(common-objpfx)gcc-macros.h: $(common-objpfx)gcc-macros.h.in
+ sed 's/^#define /#define GCCMACRO/' < $< > $@
+before-compile += $(common-objpfx)gcc-macros.h
+
+# Generate version maps, but wait until sysdep-subdirs is known
+ifeq ($(sysd-sorted-done),t)
+ifeq ($(build-shared),yes)
+-include $(common-objpfx)sysd-versions
+-include $(common-objpfx)Versions.mk
+$(addprefix $(common-objpfx),$(version-maps)): $(common-objpfx)sysd-versions
+common-generated += $(version-maps)
+postclean-generated += sysd-versions Versions.all abi-versions.h \
+ Versions.def Versions.v.i Versions.v Versions.mk
+
+ifndef avoid-generated
+ifneq ($(sysd-versions-subdirs),$(sorted-subdirs) $(config-sysdirs))
+sysd-versions-force = FORCE
+FORCE:
+endif
+
+$(common-objpfx)Versions.def: $(..)scripts/versionlist.awk \
+ $(common-objpfx)Versions.v
+ LC_ALL=C $(AWK) -f $^ > $@T
+ mv -f $@T $@
+
+$(common-objpfx)Versions.all: $(..)scripts/firstversions.awk \
+ $(common-objpfx)soversions.i \
+ $(common-objpfx)Versions.def
+ { while read which lib version setname; do \
+ test x"$$which" = xDEFAULT || continue; \
+ test -z "$$setname" || echo "$$lib : $$setname"; \
+ done < $(word 2,$^); \
+ cat $(word 3,$^); \
+ } | LC_ALL=C $(AWK) -f $< > $@T
+ mv -f $@T $@
+$(common-objpfx)Versions.mk: $(..)scripts/haveversions.awk \
+ $(common-objpfx)Versions.all
+ $(AWK) -f $^ > $@T
+ mv -f $@T $@
+# See %.v/%.v.i implicit rules in Makeconfig.
+$(common-objpfx)Versions.v.i: $(wildcard $(subdirs:%=$(..)%/Versions)) \
+ $(wildcard $(sysdirs:%=%/Versions)) \
+ $(sysd-versions-force)
+$(common-objpfx)sysd-versions: $(common-objpfx)versions.stmp
+$(common-objpfx)versions.stmp: $(common-objpfx)Versions.all \
+ $(common-objpfx)Versions.v \
+ $(..)scripts/versions.awk
+ ( echo 'sysd-versions-subdirs = $(subdirs) $(config-sysdirs)' ; \
+ cat $(word 2,$^) \
+ | LC_ALL=C $(AWK) -v buildroot=$(common-objpfx) -v defsfile=$< \
+ -v move_if_change='$(move-if-change)' \
+ -f $(word 3,$^); \
+ ) > $(common-objpfx)sysd-versionsT
+ mv -f $(common-objpfx)sysd-versionsT $(common-objpfx)sysd-versions
+ touch $@
+endif # avoid-generated
+endif # $(build-shared) = yes
+
+-include $(common-objpfx)time64-compat.mk
+postclean-generated += time64-compat.mk
+
+$(common-objpfx)time64-compat.mk: $(common-objpfx)time64-compat.mk.i \
+ $(sysd-versions-force)
+ sed '/^[ ]*#/d;/^[ ]*$$/d' $< > $@T
+ mv -f $@T $@
+$(common-objpfx)time64-compat.mk.i: $(..)Makeconfig
+ printf "#include <time64-compat.h>\n#ifdef TIME64_NON_DEFAULT\nhave-time64-compat = yes\n#endif" \
+ | $(CC) -E -undef $(CPPFLAGS) -x assembler-with-cpp - > $@T
+ mv -f $@T $@
+
+
+endif # sysd-sorted-done
# The name under which the run-time dynamic linker is installed.
# We are currently going for the convention that `/lib/ld.so.1'
ifeq ($(build-shared),yes)
-libdl = $(common-objpfx)dlfcn/libdl.so$(libdl.so-version)
+libm = $(common-objpfx)math/libm.so$(libm.so-version)
+libmvec = $(common-objpfx)mathvec/libmvec.so$(libmvec.so-version)
else
-libdl = $(common-objpfx)dlfcn/libdl.a
+libm = $(common-objpfx)math/libm.a
+libmvec = $(common-objpfx)mathvec/libmvec.a
endif
ifeq ($(build-shared),yes)
-libm = $(common-objpfx)math/libm.so$(libm.so-version)
+libsupport = $(common-objpfx)support/libsupport_nonshared.a
else
-libm = $(common-objpfx)math/libm.a
+libsupport = $(common-objpfx)support/libsupport.a
endif
-# These are the subdirectories containing the library source. The order
-# is more or less arbitrary. The sorting step will take care of the
-# dependencies.
+# This is a partial list of subdirectories containing the library source.
+# The order is more or less arbitrary. The sorting step will take care of the
+# dependencies and generate sorted-subdirs dynamically.
all-subdirs = csu assert ctype locale intl catgets math setjmp signal \
stdlib stdio-common libio malloc string wcsmbs time dirent \
- grp pwd posix io termios resource misc socket sysvipc gmon \
- gnulib iconv iconvdata wctype manual shadow gshadow po argp \
- crypt localedata timezone rt conform debug \
- $(add-on-subdirs) dlfcn elf
+ posix io termios resource misc socket sysvipc gmon \
+ gnulib iconv iconvdata wctype manual po argp \
+ localedata timezone rt conform debug mathvec support \
+ dlfcn elf
ifndef avoid-generated
# sysd-sorted itself will contain rules making the sysd-sorted target
sysd-rules-targets := $(sort $(foreach p,$(sysd-rules-patterns),\
$(firstword $(subst :, ,$p))))
+# $(libpthread-routines-var) and $(librt-routines-var) are the make
+# variable to which pthread routines need to be added to land in the
+# right library.
+ifeq ($(pthread-in-libc),yes)
+libpthread-routines-var = routines
+librt-routines-var = routines
+libanl-routines-var = routines
+else
+libpthread-routines-var = libpthread-routines
+librt-routines-var = librt-routines
+libanl-routines-var = libanl-routines
+endif
+
# A sysdeps Makeconfig fragment may set libc-reentrant to yes.
ifeq (yes,$(libc-reentrant))
defines += -D_LIBC_REENTRANT
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