-# Copyright (C) 1991-2003, 2004, 2005 Free Software Foundation, Inc.
+# 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
# 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, write to the Free
-# Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
-# 02111-1307 USA.
+# License along with the GNU C Library; if not, see
+# <http://www.gnu.org/licenses/>.
#
# Makefile configuration options for the GNU C library.
.. := ../
endif
-# If config.make exists, the source directory was configured,
-# so don't try to be clever and find another directory to build in.
-ifneq (,$(wildcard $(..)config.make))
-ARCH =
-machine =
-else # Not configured.
-ifndef ARCH
-ifdef machine
-ARCH = $(machine)
-endif # machine
-endif # ARCH
-endif # config.make
-
-# Directory for object files and libc.a. If this is not defined, the
-# object files live in the subdirectories where their sources live, and
-# libc.a lives in the parent directory (this probably doesn't work any
-# more).
-ifdef ARCH
-ifeq ($(filter /%,$(ARCH)),)
-objdir := $(..)$(ARCH)
-else
-objdir = $(ARCH)
-endif
-endif
-
# $(common-objdir) is the place to put objects and
# such that are not specific to a single subdir.
ifdef objdir
common-objpfx = $(objdir)/
common-objdir = $(objdir)
else
-objpfx :=
-ifdef ..
-common-objpfx = $(..)
-common-objdir = ..
-else
-# This is a kludge. make wizards might grok.
-common-objpfx = sysdeps/../
-common-objdir = .
-endif
+objdir must be defined by the build-directory Makefile.
endif
# Root of the sysdeps tree.
# What flags to give to tests which test stack alignment
stack-align-test-flags =
-# We have a special subdir for each binary format.
-# For now, only ELF is fully supported.
-ifeq ($(elf),yes)
-binfmt-subdir = elf
-else
-# This is probably better than nothing.
-binfmt-subdir = aout
-endif
-
# Complete path to sysdep dirs.
-export full_config_sysdirs := $(addprefix $(..),$(config-sysdirs))
+# `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)
+ifdef objdir
++sysdep_dirs := $(objdir) $(+sysdep_dirs)
+endif
# Run config.status to update config.make and config.h. We don't show the
# dependence of config.h to Make, because it is only touched when it
# Find all the add-on and sysdeps configure fragments, to make sure we
# re-run configure when any of them changes.
$(common-objpfx)config.status: $(..)version.h $(..)configure \
- $(foreach dir,$(full_config_sysdirs),\
- $(wildcard \
- $(dir)/Implies) \
+ $(foreach dir,$(sysdirs),\
+ $(wildcard $(dir)/Implies) \
$(patsubst %.in,%,\
$(firstword $(wildcard \
$(addprefix $(dir)/,configure configure.in))))) \
$(patsubst %.in,%,\
- $(foreach dir,$(add-ons),\
+ $(foreach add-on,$(add-ons),\
$(firstword $(wildcard \
- $(addprefix $(..)$(dir)/,configure configure.in)))))
+ $(addprefix $(firstword $(filter /%,$(add-on)) $(..)$(add-on))/,\
+ configure configure.in)))))
@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_infodir = $(install_root)$(infodir)
+# Where to install audit libraries.
+ifndef auditdir
+auditdir = $(libdir)/audit
+endif
+inst_auditdir = $(install_root)$(auditdir)
+
# Where to install default configuration files. These include the local
# timezone specification and network data base files.
ifndef sysconfdir
endif
inst_sysconfdir = $(install_root)$(sysconfdir)
-# What timezone should be the installed default (e.g., US/Eastern).
-# Run `make -C time echo-zonenames' to see a list of available zone names.
-# The local timezone can be changed with `zic -l TIMEZONE' at any time.
-ifndef localtime
-localtime = Factory
+# Directory for the database files and Makefile for nss_db.
+ifndef vardbdir
+vardbdir = $(localstatedir)/db
endif
+inst_vardbdir = $(install_root)$(vardbdir)
# Where to install the "localtime" timezone file; this is the file whose
# contents $(localtime) specifies. If this is a relative pathname, it is
# localizing the configuration data elsewhere.
ifndef localtime-file
localtime-file = $(sysconfdir)/localtime
-inst_localtime-file = $(install_root)$(localtime-file)
endif
# What to use for leap second specifications in compiling the default
asm-CPPFLAGS =
endif
-# ELF always supports init/fini sections
-ifeq ($(elf),yes)
-have-initfini = yes
-endif
+as-needed := -Wl,--as-needed
+no-as-needed := -Wl,--no-as-needed
+
+# Must be supported by the linker.
+no-whole-archive = -Wl,--no-whole-archive
+whole-archive = -Wl,--whole-archive
# Installed name of the startup code.
-ifneq ($(have-initfini),yes)
-# When not having init/fini, there is just one startfile, called crt0.o.
-start-installed-name = crt0.o
-else
-# On systems having init/fini, crt0.o is called crt1.o, and there are
-# some additional bizarre files.
+# The ELF convention is that the startfile is called crt1.o
start-installed-name = crt1.o
-endif
# On systems that do not need a special startfile for statically linked
# binaries, simply set it to the normal name.
ifndef static-start-installed-name
static-start-installed-name = $(start-installed-name)
endif
-ifeq (yesyesyes,$(build-shared)$(elf)$(have-z-combreloc))
+ifeq (yesyes,$(build-shared)$(have-z-combreloc))
combreloc-LDFLAGS = -Wl,-z,combreloc
LDFLAGS.so += $(combreloc-LDFLAGS)
LDFLAGS-rtld += $(combreloc-LDFLAGS)
endif
-ifeq (yes,$(have-z-relro))
relro-LDFLAGS = -Wl,-z,relro
LDFLAGS.so += $(relro-LDFLAGS)
LDFLAGS-rtld += $(relro-LDFLAGS)
-endif
-# Command for linking programs with the C library.
+ifeq (yes,$(have-hash-style))
+# For the time being we unconditionally use 'both'. At some time we
+# should declare statically linked code as 'out of luck' and compile
+# with --hash-style=gnu only.
+hashstyle-LDFLAGS = -Wl,--hash-style=both
+LDFLAGS.so += $(hashstyle-LDFLAGS)
+LDFLAGS-rtld += $(hashstyle-LDFLAGS)
+endif
+
+# Command for linking PIE programs with the C library.
+ifndef +link-pie
++link-pie = $(CC) -pie -Wl,-O1 -nostdlib -nostartfiles -o $@ \
+ $(sysdep-LDFLAGS) $(config-LDFLAGS) $(LDFLAGS) $(LDFLAGS-$(@F)) \
+ $(combreloc-LDFLAGS) $(relro-LDFLAGS) $(hashstyle-LDFLAGS) \
+ $(addprefix $(csu-objpfx),S$(start-installed-name)) \
+ $(+preinit) $(+prectorS) \
+ $(filter-out $(addprefix $(csu-objpfx),start.o \
+ S$(start-installed-name))\
+ $(+preinit) $(link-extra-libs) \
+ $(common-objpfx)libc% $(+postinit),$^) \
+ $(link-extra-libs) $(link-libc) $(+postctorS) $(+postinit)
+endif
+# Command for statically linking programs with the C library.
+ifndef +link-static
++link-static-before-libc = $(CC) -nostdlib -nostartfiles -static -o $@ \
+ $(sysdep-LDFLAGS) $(LDFLAGS) $(LDFLAGS-$(@F)) \
+ $(addprefix $(csu-objpfx),$(static-start-installed-name)) \
+ $(+preinit) $(+prectorT) \
+ $(filter-out $(addprefix $(csu-objpfx),start.o \
+ $(start-installed-name))\
+ $(+preinit) $(link-extra-libs-static) \
+ $(common-objpfx)libc% $(+postinit),$^) \
+ $(link-extra-libs-static)
++link-static-after-libc = $(+postctorT) $(+postinit)
++link-static = $(+link-static-before-libc) $(link-libc-static) \
+ $(+link-static-after-libc)
++link-static-tests = $(+link-static-before-libc) $(link-libc-static-tests) \
+ $(+link-static-after-libc)
+endif
+# Commands for linking programs with the C library.
ifndef +link
-+link = $(CC) -nostdlib -nostartfiles -o $@ \
+ifeq (yes,$(build-shared))
++link-before-libc = $(CC) -nostdlib -nostartfiles -o $@ \
$(sysdep-LDFLAGS) $(config-LDFLAGS) $(LDFLAGS) $(LDFLAGS-$(@F)) \
- $(combreloc-LDFLAGS) $(relro-LDFLAGS) \
+ $(combreloc-LDFLAGS) $(relro-LDFLAGS) $(hashstyle-LDFLAGS) \
$(addprefix $(csu-objpfx),$(start-installed-name)) \
$(+preinit) $(+prector) \
$(filter-out $(addprefix $(csu-objpfx),start.o \
$(start-installed-name))\
$(+preinit) $(link-extra-libs) \
$(common-objpfx)libc% $(+postinit),$^) \
- $(link-extra-libs) $(link-libc) $(+postctor) $(+postinit)
+ $(link-extra-libs)
++link-after-libc = $(+postctor) $(+postinit)
++link = $(+link-before-libc) $(link-libc) $(+link-after-libc)
++link-tests = $(+link-before-libc) $(link-libc-tests) $(+link-after-libc)
+else
++link = $(+link-static)
++link-tests = $(+link-static-tests)
endif
-# Command for statically linking programs with the C library.
-ifndef +link-static
-+link-static = $(CC) -nostdlib -nostartfiles -static -o $@ \
- $(sysdep-LDFLAGS) $(LDFLAGS) \
- $(addprefix $(csu-objpfx),$(static-start-installed-name)) \
- $(+preinit) $(+prector) \
- $(filter-out $(addprefix $(csu-objpfx),start.o \
- $(start-installed-name))\
- $(+preinit) $(link-extra-libs-static) \
- $(common-objpfx)libc% $(+postinit),$^) \
- $(link-extra-libs-static) $(link-libc-static) $(+postctor) $(+postinit)
endif
# Command for statically linking bounded-pointer programs with the C library.
ifndef +link-bounded
+link-bounded = $(CC) -nostdlib -nostartfiles -static -fbounded-pointers -o $@ \
$(sysdep-LDFLAGS) $(LDFLAGS) \
$(addprefix $(csu-objpfx),b$(static-start-installed-name)) \
- $(+preinit) $(+prector) \
+ $(+preinit) $(+prectorT) \
$(filter-out $(addprefix $(csu-objpfx),start.ob \
$(start-installed-name))\
$(+preinit) $(link-extra-libs-bounded) \
$(common-objpfx)libc% $(+postinit),$^) \
- $(link-extra-libs-bounded) $(link-libc-bounded) $(+postctor) $(+postinit)
+ $(link-extra-libs-bounded) $(link-libc-bounded) $(+postctorT) $(+postinit)
endif
ifndef config-LDFLAGS
-ifeq (yesyes,$(build-shared)$(elf))
+ifeq (yes,$(build-shared))
config-LDFLAGS = -Wl,-dynamic-linker=$(slibdir)/$(rtld-installed-name)
endif
endif
ifndef link-libc
ifeq (yes,$(build-shared))
-ifeq ($(elf),yes)
# We need the versioned name of libc.so in the deps of $(others) et al
# so that the symlink to libc.so is created before anything tries to
# run the linked programs.
-link-libc = -Wl,-rpath-link=$(rpath-link) \
+link-libc-before-gnulib = -Wl,-rpath-link=$(rpath-link) \
$(common-objpfx)libc.so$(libc.so-version) \
- $(common-objpfx)$(patsubst %,$(libtype.oS),c) $(gnulib)
+ $(common-objpfx)$(patsubst %,$(libtype.oS),c) \
+ $(as-needed) $(common-objpfx)elf/ld.so $(no-as-needed)
+link-libc = $(link-libc-before-gnulib) $(gnulib)
+link-libc-tests = $(link-libc-before-gnulib) $(gnulib-tests)
# This is how to find at build-time things that will be installed there.
rpath-dirs = math elf dlfcn nss nis rt resolv crypt
-endif
rpath-link = \
$(common-objdir):$(subst $(empty) ,:,$(patsubst ../$(subdir),.,$(rpath-dirs:%=$(common-objpfx)%)))
-elfobjdir := $(patsubst ../$(subdir),.,$(common-objpfx)elf)
else
-nssobjdir := $(patsubst ../$(subdir),.,$(common-objpfx)nss)
-resolvobjdir := $(patsubst ../$(subdir),.,$(common-objpfx)resolv)
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
+elfobjdir := $(patsubst ../$(subdir),.,$(common-objpfx)elf)
+
# Differences in the linkers on the various platforms.
-ifeq ($(elf),yes)
LDFLAGS-rpath-ORIGIN = -Wl,-rpath,'$$ORIGIN'
LDFLAGS-soname-fname = -Wl,-soname,$(@F)
LDFLAGS-rdynamic = -rdynamic
LDFLAGS-Bsymbolic = -Bsymbolic
-endif
# Choose the default search path for the dynamic linker based on
# where we will install libraries.
endif
# The static libraries.
-ifeq (yes,$(build-static))
-link-libc-static = $(common-objpfx)libc.a $(static-gnulib) $(common-objpfx)libc.a
-else
-ifeq (yes,$(build-shared))
-# We can try to link the programs with lib*_pic.a...
-link-libc-static = $(static-gnulib) $(common-objpfx)libc_pic.a
-endif
-endif
+link-libc-static = -Wl,--start-group $(common-objpfx)libc.a $(static-gnulib) -Wl,--end-group
+link-libc-static-tests = -Wl,--start-group $(common-objpfx)libc.a $(static-gnulib-tests) -Wl,--end-group
link-libc-bounded = $(common-objpfx)libc_b.a $(gnulib) $(common-objpfx)libc_b.a
+# How to link against libgcc. Some libgcc functions, such as those
+# for "long long" arithmetic or software floating point, can always be
+# built without use of C library headers and do not have any global
+# state so can safely be linked statically into any executable or
+# shared library requiring them; these functions are in libgcc.a.
+# Other functions, relating to exception handling, may require C
+# library headers to build and it may not be safe to have more than
+# one copy of them in a process; these functions are only in
+# libgcc_s.so and libgcc_eh.a.
+#
+# To avoid circular dependencies when bootstrapping, it is desirable
+# to avoid use of libgcc_s and libgcc_eh in building glibc. Where any
+# glibc functionality (in particular, thread cancellation) requires
+# exception handling, this is implemented through dlopen of libgcc_s
+# to avoid unnecessary dependencies on libgcc_s by programs not using
+# that functionality; executables built with glibc do not use
+# exception handling other than through thread cancellation.
+#
+# Undefined references to functions from libgcc_eh or libgcc_s may
+# arise for code built with -fexceptions. In the case of statically
+# linked programs installed by glibc, unwinding will never actually
+# occur at runtime and the use of elf/static-stubs.c to resolve these
+# references is safe. In the case of statically linked test programs
+# and test programs built with -fexceptions, unwinding may occur in
+# some cases and it is preferable to link with libgcc_eh or libgcc_s
+# so that the testing is as similar as possible to how programs will
+# be built with the installed glibc.
+#
+# Some architectures have architecture-specific systems for exception
+# handling that may involve undefined references to
+# architecture-specific functions. On those architectures,
+# gnulib-arch and static-gnulib-arch may be defined in sysdeps
+# makefiles to use additional libraries for linking executables and
+# shared libraries built by glibc.
ifndef gnulib
ifneq ($(have-cc-with-libunwind),yes)
libunwind =
else
libunwind = -lunwind
endif
-ifneq ($(have-as-needed),yes)
- libgcc_eh := -lgcc_eh $(libunwind)
+libgcc_eh := -Wl,--as-needed -lgcc_s $(libunwind) -Wl,--no-as-needed
+gnulib-arch =
+gnulib = -lgcc $(gnulib-arch)
+gnulib-tests := -lgcc $(libgcc_eh)
+static-gnulib-arch =
+# By default, elf/static-stubs.o, instead of -lgcc_eh, is used to
+# statically link programs. When --disable-shared is used, we use
+# -lgcc_eh since elf/static-stubs.o isn't sufficient.
+ifeq (yes,$(build-shared))
+static-gnulib = -lgcc $(static-gnulib-arch)
else
- libgcc_eh := -Wl,--as-needed -lgcc_s$(libgcc_s_suffix) $(libunwind) -Wl,--no-as-needed
+static-gnulib = -lgcc -lgcc_eh $(static-gnulib-arch)
endif
-gnulib := -lgcc $(libgcc_eh)
-static-gnulib := -lgcc -lgcc_eh $(libunwind)
+static-gnulib-tests := -lgcc -lgcc_eh $(libunwind)
libc.so-gnulib := -lgcc
endif
-ifeq ($(elf),yes)
+preinit = $(addprefix $(csu-objpfx),crti.o)
+postinit = $(addprefix $(csu-objpfx),crtn.o)
-+prector = `$(CC) --print-file-name=crtbegin.o`
-+postctor = `$(CC) --print-file-name=crtend.o`
++prector = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtbegin.o`
++postctor = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtend.o`
+# Variants of the two previous definitions for linking PIE programs.
++prectorS = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtbeginS.o`
++postctorS = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtendS.o`
+# Variants of the two previous definitions for statically linking programs.
++prectorT = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtbeginT.o`
++postctorT = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtend.o`
+interp = $(addprefix $(elf-objpfx),interp.os)
-endif
csu-objpfx = $(common-objpfx)csu/
elf-objpfx = $(common-objpfx)elf/
+# A command that, prepended to the name and arguments of a program,
+# and run on the build system, causes that program with those
+# arguments to be run on the host for which the library is built.
+ifndef test-wrapper
+test-wrapper =
+endif
+# Likewise, but the name of the program is preceded by
+# <variable>=<value> assignments for environment variables.
+ifndef test-wrapper-env
+test-wrapper-env = $(test-wrapper) env
+endif
+
+# Whether to run test programs built for the library's host system.
+ifndef run-built-tests
+ifeq (yes|,$(cross-compiling)|$(test-wrapper))
+run-built-tests = no
+else
+run-built-tests = yes
+endif
+endif
+
# How to run a program we just linked with our library.
# The program binary is assumed to be $(word 2,$^).
built-program-file = $(dir $(word 2,$^))$(notdir $(word 2,$^))
-ifeq (yesyes,$(build-shared)$(elf))
+ifeq (yes,$(build-shared))
comma = ,
sysdep-library-path = \
$(subst $(empty) ,:,$(strip $(patsubst -Wl$(comma)-rpath-link=%, %,\
$(filter -Wl$(comma)-rpath-link=%,\
$(sysdep-LDFLAGS)))))
-run-program-prefix = $(if $(filter $(notdir $(built-program-file)),\
- $(tests-static) $(xtests-static)),, \
- $(elf-objpfx)$(rtld-installed-name) \
- --library-path $(rpath-link)$(patsubst %,:%,$(sysdep-library-path)))
+# $(run-via-rtld-prefix) is a command that, when prepended to the name
+# of a program built with the newly built library, produces a command
+# that, executed on the host for which the library is built, runs that
+# program. For the statically-linked %-bp test programs, and for
+# tests listed in tests-static or xtests-static, it is empty.
+run-via-rtld-prefix = \
+ $(if $(strip $(filter $(notdir $(built-program-file)), \
+ $(tests-static) $(xtests-static)) \
+ $(filter %-bp,$(built-program-file))),, \
+ $(elf-objpfx)$(rtld-installed-name) \
+ --library-path $(rpath-link)$(patsubst %,:%,$(sysdep-library-path)))
else
-run-program-prefix =
-endif
-# Never use $(run-program-prefix) for the statically-linked %-bp test programs
-built-program-cmd = $(patsubst %,$(run-program-prefix),\
- $(filter-out %-bp,$(built-program-file))) \
- $(built-program-file)
+run-via-rtld-prefix =
+endif
+# $(run-program-prefix) is a command that, when prepended to the name
+# of a program built with the newly built library, produces a command
+# that, executed on the build system on which "make" is run, runs that
+# program.
+run-program-prefix = $(test-wrapper) $(run-via-rtld-prefix)
+# $(built-program-cmd) is a command that, executed on the build system
+# on which "make" is run, runs the newly built program that is the
+# second dependency of the makefile target in which
+# $(built-program-cmd) is used.
+built-program-cmd = $(test-wrapper) \
+ $(run-via-rtld-prefix) $(built-program-file)
+# $(host-built-program-cmd) is a command that, executed on the host
+# for which the library is built, runs the newly built program that is
+# the second dependency of the makefile target in which
+# $(host-built-program-cmd) is used.
+host-built-program-cmd = $(run-via-rtld-prefix) $(built-program-file)
ifndef LD
LD := ld -X
endif
-ifndef RANLIB
-RANLIB = ranlib
-endif
-
# Extra flags to pass to GCC.
ifeq ($(all-warnings),yes)
-+gccwarn := -Wall -Wwrite-strings -Winline -Wstrict-prototypes -Wcast-qual -Wbad-function-cast -Wmissing-noreturn -Wmissing-prototypes -Wmissing-declarations -Wcomment -Wcomments -Wtrigraphs -Wsign-compare -Wfloat-equal -Wmultichar
++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 -Wstrict-prototypes
++gccwarn := -Wall -Wwrite-strings -Winline
endif
++gccwarn-c = -Wstrict-prototypes
+
+# We do not depend on the address of constants in different files to be
+# actually different, so allow the compiler to merge them all.
++merge-constants = -fmerge-all-constants
+
+# We have to assume that glibc functions are called in any rounding
+# mode and also change the rounding mode in a few functions. So,
+# disable any optimization that assume default rounding mode.
++math-flags = -frounding-math
# 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
# The program that makes Emacs-style TAGS files.
ETAGS := etags
+# The `xgettext' program for producing .pot files from sources.
+ifndef XGETTEXT
+XGETTEXT = xgettext
+endif
+
# The `m4' macro processor; this is used by sysdeps/sparc/Makefile (and
# perhaps others) to preprocess assembly code in some cases.
M4 = m4
+cflags := $(default_cflags)
endif # $(+cflags) == ""
-+cflags := $(+cflags) $(+gccwarn)
++cflags += $(cflags-cpu) $(+gccwarn) $(+merge-constants) $(+math-flags)
+gcc-nowarn := -w
# Don't duplicate options if we inherited variables from the parent.
+cflags := $(sort $(+cflags))
-
-# These are flags given to the C compiler to tell it to look for include
-# files (including ones given in angle brackets) in the current directory,
-# in the parent library source directory and in the include directory.
-# `+sysdep-includes' will be defined by Makerules.
-+includes = -I$(..)include -I. \
- $(patsubst %/,-I%,$(objpfx)) $(patsubst %/,-I%,$(..)) \
- $(libio-include) $(includes) \
- $(+sysdep-includes) $(sysincludes)
+# These are flags given to the C compiler to tell it to look for
+# include files (including ones given in angle brackets) in the parent
+# library source directory, in the include directory, and in the
+# current directory.
++sysdep-includes = $(addprefix -I,$(+sysdep_dirs))
++includes = -I$(..)include $(if $(subdir),$(objpfx:%/=-I%)) \
+ $(+sysdep-includes) $(includes) \
+ $(patsubst %/,-I%,$(..)) $(libio-include) -I. $(sysincludes)
# Since libio has several internal header files, we use a -I instead
# of many little headers in the include directory.
# 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 = $($(subdir)-CPPFLAGS) $(+includes) $(defines) \
+CPPFLAGS = $(CPPUNDEFS) $(CPPFLAGS-config) $($(subdir)-CPPFLAGS) \
+ $(+includes) $(defines) \
-include $(..)include/libc-symbols.h $(sysdep-CPPFLAGS) \
$(CPPFLAGS-$(suffix $@)) \
$(foreach lib,$(libof-$(basename $(@F))) \
- $(libof-$(<F)) $(libof-$(@F)),$(CPPFLAGS-$(lib))) \
+ $(libof-$(<F)) $(libof-$(@F)),$(CPPFLAGS-$(lib))) \
$(CPPFLAGS-$(<F)) $(CPPFLAGS-$(@F)) $(CPPFLAGS-$(basename $(@F)))
-override CFLAGS = -std=gnu99 \
- $(filter-out %frame-pointer,$(+cflags)) $(sysdep-CFLAGS) \
- $(CFLAGS-$(suffix $@)) $(CFLAGS-$(<F)) $(CFLAGS-$(@F))
+override CFLAGS = -std=gnu99 $(gnu89-inline-CFLAGS) $(config-extra-cflags) \
+ $(filter-out %frame-pointer,$(+cflags)) $(+gccwarn-c) \
+ $(sysdep-CFLAGS) $(CFLAGS-$(suffix $@)) $(CFLAGS-$(<F)) \
+ $(CFLAGS-$(@F)) \
+ $(foreach lib,$(libof-$(basename $(@F))) \
+ $(libof-$(<F)) $(libof-$(@F)),$(CFLAGS-$(lib)))
+override CXXFLAGS = $(c++-sysincludes) \
+ $(filter-out %frame-pointer,$(+cflags)) $(sysdep-CFLAGS) \
+ $(CFLAGS-$(suffix $@)) $(CFLAGS-$(<F)) $(CFLAGS-$(@F))
# If everything is compiled with -fPIC (implicitly) we must tell this by
# defining the PIC symbol.
object-suffixes :=
CPPFLAGS-.o = $(pic-default)
CFLAGS-.o = $(filter %frame-pointer,$(+cflags))
-ifeq (yes,$(build-static))
libtype.o := lib%.a
object-suffixes += .o
-endif
ifeq (yes,$(build-shared))
# Under --enable-shared, we will build a shared library of PIC objects.
# The PIC object files are named foo.os.
# This one should always stay like this unless there is a very good reason.
PIC-ccflag = -fPIC
endif
+# This can be changed by a sysdep makefile
+pie-ccflag = -fpie
+# This one should always stay like this unless there is a very good reason.
+PIE-ccflag = -fPIE
ifeq (yes,$(build-profile))
# Under --enable-profile, we will build a static library of profiled objects.
# The profiled object files are named foo.op.
CFLAGS-.op = -pg
libtype.op = lib%_p.a
endif
-ifeq (yes,$(build-omitfp))
-# Under --enable-omitfp, we build the library optimized without
-# debugging information using -fomit-frame-pointer, and build an extra
-# library with debugging information. The debuggable objects are named foo.og.
-object-suffixes += .og
-CPPFLAGS-.og = $(pic-default)
-CFLAGS-.og = -g
-CFLAGS-.o = $(filter %frame-pointer,$(+cflags)) -g0 -O99 -fomit-frame-pointer -D__USE_STRING_INLINES
-CFLAGS-.os += -g0 -O99 -fomit-frame-pointer -D__USE_STRING_INLINES
-libtype.og = lib%_g.a
-endif
+
+# Convenience variable for when we want to treat shared-library cases
+# differently from the rest.
+object-suffixes-noshared := $(filter-out .os,$(object-suffixes))
bppfx = BP-
ifeq (yes,$(build-bounded))
# The assembler can generate debug information too.
ifndef ASFLAGS
-ifeq ($(have-cpp-asm-debuginfo),yes)
-ASFLAGS := $(filter -g%,$(CFLAGS))
-else
-ASFLAGS :=
-endif
+ASFLAGS := $(filter -g% -fdebug-prefix-map=%,$(CFLAGS))
endif
-ASFLAGS += $(ASFLAGS-config)
-
-+gnu-stabs = $(shell echo>&2 '*** BARF ON ME')
+ASFLAGS += $(ASFLAGS-config) $(asflags-cpu)
ifndef BUILD_CC
BUILD_CC = $(CC)
move-if-change = $(SHELL) $(..)scripts/move-if-change
\f
--include $(common-objpfx)sysd-dirs
-
-ifeq ($(sysd-dirs-done),t)
-include $(common-objpfx)sysd-sorted
subdirs = $(sorted-subdirs)
-endif
+subdir-srcdirs = $(foreach dir,$(subdirs),\
+ $(firstword $($(dir)-srcdir) $(..)$(dir)))
ifeq (yes, $(build-shared))
# `FOO.v', and along with that `FOO.v.i' should be given dependencies
# listing both its input files, and any header files that it may reference
# (but no commands).
-%.v.i: $(common-objpfx)config.h
- sed '/^[ ]*#/d;s/^[ ]*%/#/' $(filter-out FORCE %.h,$^) \
- | $(CC) -E -undef $(CPPFLAGS) \
- -DASSEMBLER -x assembler-with-cpp - \
+%.v.i: $(common-objpfx)config.h $(..)Makeconfig
+ sed '/^[ ]*%/!s/#.*$$//;/^[ ]*$$/d;s/^[ ]*%/#/' \
+ $(filter-out FORCE %.h $(..)Makeconfig,$^) \
+ | $(CC) -E -undef $(CPPFLAGS) -x assembler-with-cpp - \
> $@T
mv -f $@T $@
%.v: %.v.i
sed '/^[ ]*#/d;/^[ ]*$$/d' $< > $@T
mv -f $@T $@
+# To generate a header to support more than one ABI for different
+# architecture variants, the CPU/Makefile defines abi-variants to be a
+# list of names for those variants (e.g. 32 64), and, for each variant,
+# defines abi-$(variant)-condition to be the condition for those options
+# to use in a C #if condition. abi-includes may be defined to a list of
+# headers to include in the generated header, if the default does not
+# suffice. default-abi is defined to be the ABI for the current glibc
+# build.
+
+ifndef abi-includes
+abi-includes := bits/wordsize.h
+endif
+
# Process the shlib-versions file, which tells us what shared library
# version numbers to use when we install shared objects on this system.
# We need to wait until $(subdirs) is complete.
# This lets add-ons give more-specific matches that override defaults
# in the top-level file.
$(common-objpfx)shlib-versions.v.i: \
- $(wildcard $(patsubst %, $(..)%/shlib-versions,$(add-ons) \
- $(config-sysdirs) \
- $(subdirs))) \
+ $(wildcard $(+sysdep_dirs:=/shlib-versions) \
+ $(subdir-srcdirs:=/shlib-versions)) \
$(..)shlib-versions
soversions-default-setname = $(patsubst %, %,\
-v os='$(config-os)' \
-f $^ > $@T
mv -f $@T $@
-$(common-objpfx)soversions.mk: $(common-objpfx)soversions.i
+$(common-objpfx)soversions.mk: $(common-objpfx)soversions.i $(..)Makeconfig
(while read which lib number setname; do \
+ eval seen_$$which=1; \
+ test x"$$which" != xABI || echo abi-name = "$$lib"; \
test x"$$which" = xDEFAULT || continue; \
case $$number in \
[0-9]*) echo "$$lib.so-version=.$$number"; \
echo "all-sonames+=$$lib=$$lib.so\$$($$lib.so-version)";;\
- *) echo "$$lib.so-version=$$number"; \
+ *) echo "$$lib.so-version=\$$(if \$$(abi-$(default-abi)-$$lib-soname),\$$(abi-$(default-abi)-$$lib-soname),$$number)"; \
echo "all-sonames+=$$lib=\$$($$lib.so-version)";;\
esac; \
done; \
$(common-objpfx)gnu/lib-names.stmp: $(..)scripts/lib-names.awk \
$(common-objpfx)soversions.i
$(make-target-directory)
- @rm -f ${@:stmp=T} $@
- $(AWK) -f $^ > ${@:stmp=T}
+ { \
+ 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 '';) \
+ $(if $(abi-variants), \
+ $(foreach v,$(abi-variants),\
+ $(if $(abi-$(v)-condition),\
+ echo '#if $(abi-$(v)-condition)'; \
+ ($(foreach s,$(all-sonames), \
+ $(if $(abi-$(v)-$(firstword $(subst =, ,$(s)))-soname),\
+ echo $(firstword $(subst =, ,$(s)))=$(abi-$(v)-$(firstword $(subst =, ,$(s)))-soname);, \
+ echo $(s);))) \
+ | LC_ALL=C $(AWK) -v multi=1 -f $(firstword $^) | LC_ALL=C sort;) \
+ $(if $(abi-$(v)-condition),echo '#endif';)), \
+ ($(foreach s,$(all-sonames), echo $(s);)) \
+ | LC_ALL=C $(AWK) -f $(firstword $^) | LC_ALL=C sort;) \
+ echo ''; \
+ echo '#endif /* gnu/lib-names.h */'; \
+ } > ${@:stmp=T}
$(move-if-change) ${@:stmp=T} ${@:stmp=h}
touch $@
endif
endif # build-shared
-ifeq ($(elf),yes)
-dlfcn = dlfcn
ifeq ($(build-shared),yes)
libdl = $(common-objpfx)dlfcn/libdl.so$(libdl.so-version)
else
libdl = $(common-objpfx)dlfcn/libdl.a
endif
-else
-ifneq (,$(findstring aix,$(config-os)))
+
ifeq ($(build-shared),yes)
-dlfcn = dlfcn
-libdl = $(common-objpfx)dlfcn/libdl.so$(libdl.so-version)
-else
-# No libdl without shared libs on AIX
-dlfcn =
-libdl =
-endif
+libm = $(common-objpfx)math/libm.so$(libm.so-version)
else
-# No ELF, no AIX - no libdl, at least for now.
-dlfcn =
-libdl =
-endif
+libm = $(common-objpfx)math/libm.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. Only the $(binfmt-subdir) should always be kept at the
-# end of the list.
+# dependencies.
all-subdirs = csu assert ctype locale intl catgets math setjmp signal \
- stdlib stdio-common libio malloc string wcsmbs time dirent \
+ 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 po argp \
- crypt $(add-ons) nss localedata timezone rt conform debug \
- $(sysdep-subdirs) $(dlfcn) $(binfmt-subdir)
-all-subdirs := $(filter-out $(sysdep-inhibit-subdirs),$(all-subdirs))
-
-# The mach and hurd subdirectories have many generated header files which
-# much of the rest of the library depends on, so it is best to build them
-# first (and mach before hurd, at that). The before-compile additions in
-# sysdeps/{mach,hurd}/Makefile should make it reliably work for these files
-# not to exist when making in other directories, but it will be slower that
-# way with more somewhat expensive `make' invocations.
-subdirs := $(filter mach,$(subdirs)) $(filter hurd,$(subdirs)) \
- $(filter-out mach hurd,$(subdirs))
+ gnulib iconv iconvdata wctype manual shadow gshadow po argp \
+ crypt nss localedata timezone rt conform debug \
+ $(add-on-subdirs) dlfcn elf
ifndef avoid-generated
-all-Subdirs-files = $(wildcard $(config-sysdirs:%=$(..)%/Subdirs))
-$(common-objpfx)sysd-dirs: $(common-objpfx)config.make $(all-Subdirs-files)
- $(AWK) 'BEGIN { subdirs = ""; inhibit = "" }; \
- /^#/ { next }; \
- /^[^-]/ { subdirs = subdirs " " $$0 }; \
- /^-/ { inhibit = inhibit " " substr($$0, 2) }; \
- END { printf "sysdep-subdirs =%s\n", subdirs; \
- printf "sysdep-inhibit-subdirs =%s\n", inhibit; \
- print "sysd-dirs-done = t" }' \
- $(patsubst $<,/dev/null,$^) > $@-tmp
- mv -f $@-tmp $@
-
-all-Depend-files = $(wildcard $(..)*/Depend)
-$(common-objpfx)sysd-sorted: $(..)scripts/gen-sorted.awk $(all-Depend-files) \
- $(common-objpfx)sysd-dirs $(..)Makeconfig
- { { dirs='$(patsubst $(..)%/Depend,%,$(filter %/Depend,$^))'; \
- for d in $$dirs; do \
- while read on; do \
- echo "depend $$d $$on"; \
- done < $(..)$$d/Depend; \
- done; \
- for f in $(all-subdirs); do \
- echo $$f; \
- done; \
- } | $(AWK) -f $< && \
- echo sysd-sorted-done = t; \
- } > $@-tmp
+all-Depend-files := $(wildcard $(foreach dir,$(all-subdirs),\
+ $(firstword $($(dir)-srcdir) \
+ $(..)$(dir))/Depend))
+$(common-objpfx)sysd-sorted: $(..)scripts/gen-sorted.awk \
+ $(common-objpfx)config.make $(..)Makeconfig \
+ $(wildcard $(sysdirs:=/Subdirs)) \
+ $(all-Depend-files)
+ $(AWK) -f $< \
+ -v subdirs='$(all-subdirs)' \
+ -v srcpfx='$(..)' \
+ $(filter %/Subdirs %/Depend,$^) > $@-tmp
mv -f $@-tmp $@
+$(all-Depend-files): ;
endif
-# Let sysdeps/ subdirs contain a Makeconfig fragment for us to include here.
-sysdep-makeconfigs := $(wildcard $(patsubst %,$(..)%/Makeconfig,\
- $(config-sysdirs) $(add-ons)))
+# This gives partial TARGET:SOURCE pattern pairs to have rules
+# emitted into sysd-rules. A sysdeps Makeconfig fragment can
+# add its own special object file prefix to this list with e.g. foo-%:%
+# to have foo-*.? compiled from *.? using $(foo-CPPFLAGS).
+sysd-rules-patterns := %:% rtld-%:rtld-% rtld-%:% m_%:s_%
+# Let sysdeps/ subdirs contain a Makeconfig fragment for us to include here.
+sysdep-makeconfigs := $(wildcard $(+sysdep_dirs:=/Makeconfig))
ifneq (,$(sysdep-makeconfigs))
-Makeconfig-doing-sysdep := $(sysdep-makeconfigs)
-# Before each one, include ourselves again to do the bit below that
-# will set `Makeconfig-add-on' in an add-on's Makeconfig fragment.
-include $(foreach M,$(sysdep-makeconfigs),$(..)Makeconfig $M)
+include $(sysdep-makeconfigs)
endif
+# Compute just the target patterns. Makeconfig has set sysd-rules-patterns.
+sysd-rules-targets := $(sort $(foreach p,$(sysd-rules-patterns),\
+ $(firstword $(subst :, ,$p))))
-endif # Makeconfig not yet included
+# A sysdeps Makeconfig fragment may set libc-reentrant to yes.
+ifeq (yes,$(libc-reentrant))
+defines += -D_LIBC_REENTRANT
-# The whole body above didn't run when we are included as a subroutine
-# of ourselves in the sysdep-makeconfigs include line. This bit runs.
-ifneq (,$(Makeconfig-doing-sysdep))
-sysdep-Makeconfig := $(firstword $(Makeconfig-doing-sysdep))
-Makeconfig-doing-sysdep := $(filter-out $(sysdep-Makeconfig),\
- $(Makeconfig-doing-sysdep))
-Makeconfig-add-on := $(filter $(add-ons),$(patsubst $(..)%/Makeconfig,%,\
- $(sysdep-Makeconfig)))
+libio-mtsafe = -D_IO_MTSAFE_IO
endif
+endif # Makeconfig not yet included
+
# Local Variables:
# mode: makefile
# End:
projects / thirdparty / glibc.git / blobdiff