libstdc++-v3/src/Makefile.am

## Makefile for the C++11 sources of the GNU C++ Standard library.
##
## Copyright (C) 1997-2026 Free Software Foundation, Inc.
##
## This file is part of the libstdc++ version 3 distribution.
## Process this file with automake to produce Makefile.in.

## This file is part of the GNU ISO C++ Library.  This library is free
## software; you can redistribute it and/or modify it under the
## terms of the GNU General Public License as published by the
## Free Software Foundation; either version 3, or (at your option)
## any later version.

## This 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 General Public License for more details.

## You should have received a copy of the GNU General Public License along
## with this library; see the file COPYING3.  If not see
## <http://www.gnu.org/licenses/>.

include $(top_srcdir)/fragment.am

if GLIBCXX_HOSTED
if ENABLE_FILESYSTEM_TS
filesystem_dir = filesystem
else
filesystem_dir =
endif

if ENABLE_BACKTRACE
backtrace_dir = libbacktrace
else
backtrace_dir =
endif

experimental_dir = experimental
else
filesystem_dir =
backtrace_dir =
experimental_dir =
endif

## Keep this list sync'd with acinclude.m4:GLIBCXX_CONFIGURE.
SUBDIRS = c++98 c++11 c++17 c++20 c++23 c++26 \
	$(filesystem_dir) $(backtrace_dir) $(experimental_dir)

# automake walks SUBDIRS with a shell loop, so the source directories are
# built strictly one after another however large -j is.  They are independent
# of each other apart from the convenience archives that src/experimental
# links, so build them from make instead and let it overlap them.  automake's
# own loop still runs afterwards, where it finds everything already built and
# costs nothing, and the recursion for install, clean and the rest is
# untouched.
all-recursive: all-parallel-subdirs

all-parallel-subdirs: $(SUBDIRS:%=all-in-%)

all-in-%:
	$(MAKE) $(AM_MAKEFLAGS) -C $* all

# src/experimental links the convenience archives of these directories.
all-in-experimental: all-in-c++23 all-in-c++26 \
	$(filesystem_dir:%=all-in-%) $(backtrace_dir:%=all-in-%)

.PHONY: all-parallel-subdirs

# Cross compiler support.
if VTV_CYGMIN
toolexeclib_LTLIBRARIES = libvtv.la libstdc++.la
else
toolexeclib_LTLIBRARIES = libstdc++.la
endif

if VTV_CYGMIN
vtv_stubs.cc:
	rm -f $@
	$(LN_S) $(toplevel_srcdir)/libstdc++-v3/libsupc++/vtv_stubs.cc $@

libvtv_la_SOURCES = vtv_stubs.cc
libvtv_la_LDFLAGS = $(lt_host_flags)

libvtv_la_AM_CXXFLAGS = \
	$(glibcxx_compiler_pic_flag) \
	$(XTEMPLATE_FLAGS) \
	-Wl,-u_vtable_map_vars_start,-u_vtable_map_vars_end \
	$(WARN_CXXFLAGS) $(OPTIMIZE_CXXFLAGS) $(CONFIG_CXXFLAGS)

libvtv_la_LINK = $(LIBTOOL) --tag=CXX $(AM_LIBTOOLFLAGS) \
	$(LIBTOOLFLAGS) --mode=link $(CXXLD) $(libvtv_la_AM_CXXFLAGS) \
	$(CXXFLAGS) $(libvtv_la_LDFLAGS) $(LDFLAGS) -o $@
endif

vpath % $(top_srcdir)/src/c++98
vpath % $(top_srcdir)/src/c++11
vpath % $(top_srcdir)/src/c++17
vpath % $(top_srcdir)/src/c++20
vpath % $(top_srcdir)/src/c++23
vpath % $(top_srcdir)/src/c++26
if ENABLE_FILESYSTEM_TS
vpath % $(top_srcdir)/src/filesystem
endif
if ENABLE_BACKTRACE
vpath % $(top_srcdir)/src/libbacktrace
endif
vpath % $(top_srcdir)/src/experimental

if GLIBCXX_LDBL_COMPAT
ldbl_compat_sources = compatibility-ldbl.cc
else
ldbl_compat_sources =
endif

if GLIBCXX_LDBL_ALT128_COMPAT
if ENABLE_DUAL_ABI
ldbl_alt128_compat_cxx11_sources = \
	compatibility-ldbl-alt128-cxx11.cc
else
ldbl_alt128_compat_cxx11_sources =
endif
ldbl_alt128_compat_sources = \
	compatibility-ldbl-alt128.cc \
	${ldbl_alt128_compat_cxx11_sources}
else
ldbl_alt128_compat_sources =
endif

if ENABLE_SYMVERS_GNU_NAMESPACE
cxx0x_compat_sources =
else
cxx0x_compat_sources = \
	compatibility-atomic-c++0x.cc \
	compatibility-c++0x.cc \
	compatibility-chrono.cc \
	compatibility-condvar.cc \
	compatibility-thread-c++0x.cc
endif

parallel_compat_sources = \
	compatibility-parallel_list.cc  compatibility-parallel_list-2.cc


cxx98_sources = \
	compatibility.cc \
	compatibility-debug_list.cc \
	compatibility-debug_list-2.cc \
	${ldbl_compat_sources}

cxx11_sources = \
	${cxx0x_compat_sources} \
	${ldbl_alt128_compat_sources}

if GLIBCXX_HOSTED
libstdc___la_SOURCES = $(cxx98_sources) $(cxx11_sources)
else
# When freestanding, there's currently no compatibility to preserve.  Should
# that change, any compatibility sources can be added here.
libstdc___la_SOURCES =
endif

libstdc___la_LIBADD = \
	$(GLIBCXX_LIBS) \
	$(top_builddir)/libsupc++/libsupc++convenience.la \
	$(top_builddir)/src/c++98/libc++98convenience.la \
	$(top_builddir)/src/c++11/libc++11convenience.la \
	$(top_builddir)/src/c++17/libc++17convenience.la \
	$(top_builddir)/src/c++20/libc++20convenience.la \
	$(top_builddir)/src/c++23/libmodulesconvenience.la

libstdc___la_DEPENDENCIES = \
	${version_dep} \
	$(top_builddir)/libsupc++/libsupc++convenience.la \
	$(top_builddir)/src/c++98/libc++98convenience.la \
	$(top_builddir)/src/c++11/libc++11convenience.la \
	$(top_builddir)/src/c++17/libc++17convenience.la \
	$(top_builddir)/src/c++20/libc++20convenience.la \
	$(top_builddir)/src/c++23/libmodulesconvenience.la

if ENABLE_DARWIN_AT_RPATH
libstdc___darwin_rpath = -Wc,-nodefaultrpaths
libstdc___darwin_rpath += -Wl,-rpath,@loader_path
endif

libstdc___la_LDFLAGS = \
	-version-info $(libtool_VERSION) ${version_arg} -lm $(libstdc___darwin_rpath)

libstdc___la_LINK = $(CXXLINK) $(libstdc___la_LDFLAGS) $(lt_host_flags)

# Use special rules for compatibility-ldbl.cc compilation, as we need to
# pass -mlong-double-64, and not use -mabi={ieee,ibm}longdouble.
if GLIBCXX_LDBL_COMPAT
if GLIBCXX_LDBL_ALT128_COMPAT
LTCXXCOMPILE64 = \
  $(filter-out -mabi=ieeelongdouble -mabi=ibmlongdouble,$(LTCXXCOMPILE))
CXXCOMPILE64 = \
  $(filter-out -mabi=ieeelongdouble -mabi=ibmlongdouble,$(CXXCOMPILE))
else
LTCXXCOMPILE64 = $(LTCXXCOMPILE)
CXXCOMPILE64 = $(CXXCOMPILE)
endif
compatibility-ldbl.lo: compatibility-ldbl.cc
	$(LTCXXCOMPILE64) $(LONG_DOUBLE_COMPAT_FLAGS) -c $<
compatibility-ldbl.o: compatibility-ldbl.cc
	$(CXXCOMPILE64) $(LONG_DOUBLE_COMPAT_FLAGS) -c $<
endif

# Use special rules for compatibility-ldbl-alt128.cc compilation, as we need to
# ensure it is compiled with the correct flag.
if GLIBCXX_LDBL_ALT128_COMPAT
compatibility-ldbl-alt128.lo: compatibility-ldbl-alt128.cc
	$(LTCXXCOMPILE) $(LONG_DOUBLE_ALT128_COMPAT_FLAGS) -std=gnu++11 -c $<
compatibility-ldbl-alt128.o: compatibility-ldbl-alt128.cc
	$(CXXCOMPILE) $(LONG_DOUBLE_ALT128_COMPAT_FLAGS) -std=gnu++11 -c $<
if ENABLE_DUAL_ABI
compatibility-ldbl-alt128-cxx11.lo: compatibility-ldbl-alt128-cxx11.cc
	$(LTCXXCOMPILE) $(LONG_DOUBLE_ALT128_COMPAT_FLAGS) -std=gnu++11 -c $<
compatibility-ldbl-alt128-cxx11.o: compatibility-ldbl-alt128-cxx11.cc
	$(CXXCOMPILE) $(LONG_DOUBLE_ALT128_COMPAT_FLAGS) -std=gnu++11 -c $<
endif
endif

# Use special rules for C++11 files/objects.
compatibility-c++0x.lo: compatibility-c++0x.cc
	$(LTCXXCOMPILE) -std=gnu++11 -c $<
compatibility-c++0x.o: compatibility-c++0x.cc
	$(CXXCOMPILE) -std=gnu++11 -c $<

compatibility-atomic-c++0x.lo: compatibility-atomic-c++0x.cc
	$(LTCXXCOMPILE) -std=gnu++11 -c $<
compatibility-atomic-c++0x.o: compatibility-atomic-c++0x.cc
	$(CXXCOMPILE) -std=gnu++11 -c $<

compatibility-thread-c++0x.lo: compatibility-thread-c++0x.cc
	$(LTCXXCOMPILE) -std=gnu++11 -c $<
compatibility-thread-c++0x.o: compatibility-thread-c++0x.cc
	$(CXXCOMPILE) -std=gnu++11 -c $<

compatibility-chrono.lo: compatibility-chrono.cc
	$(LTCXXCOMPILE) -std=gnu++11 -c $<
compatibility-chrono.o: compatibility-chrono.cc
	$(CXXCOMPILE) -std=gnu++11 -c $<

compatibility-condvar.lo: compatibility-condvar.cc
	$(LTCXXCOMPILE) -std=gnu++11 -c $<
compatibility-condvar.o: compatibility-condvar.cc
	$(CXXCOMPILE) -std=gnu++11 -c $<

# A note on compatibility and static libraries.
#
# static lib == linked against only this version, should not need compat
# shared lib == linked against potentially all compat versions
#
# Thus, the shared libs have more compat symbols, which can be found
# segregated in the sources with -D_GLIBCXX_SHARED.
#
# In the sub-directories of libsupc++, src/c++98, src/c++11, src/c++17,
# src/c++20, only -prefer-pic objects are generated for the convenience
# libraries.
#
# In the main src directory, make shared and static objects just for
# the compat libraries. Shared objects are compiled with -prefer-pic
# -D_GLIBCXX_SHARED and in the .libs sub-directory, static objects are
# compiled with -prefer-pic (ie, -fPIC but not -D_GLIBCXX_SHARED) and
# the main src directory.
#
# Why are objects destined for libstdc++.a compiled with -fPIC? First,
# because -fPIC is not harmful to use for objects destined for static
# libraries. In addition, using -fPIC will allow the use of static
# libstdc++.a in the creation of other C++ shared libraries.

# AM_CXXFLAGS needs to be in each sub-directory so that it can be
# modified in a per-library or per-sub-library way.  Need to manually
# set this option because CONFIG_CXXFLAGS has to be after
# OPTIMIZE_CXXFLAGS on the compile line so that -O2 can be overridden
# as the occasion calls for it.
AM_CXXFLAGS_PRE = \
	-std=gnu++98 \
	$(glibcxx_compiler_pic_flag) \
	$(XTEMPLATE_FLAGS) $(VTV_CXXFLAGS) \
	$(WARN_CXXFLAGS) $(OPTIMIZE_CXXFLAGS) $(CONFIG_CXXFLAGS)

AM_CXXFLAGS = $(filter-out -fvtable-verify=std,$(AM_CXXFLAGS_PRE))

# Libtool notes

# 1) In general, libtool expects an argument such as `--tag=CXX' when
# using the C++ compiler, because that will enable the settings
# detected when C++ support was being configured.  However, when no
# such flag is given in the command line, libtool attempts to figure
# it out by matching the compiler name in each configuration section
# against a prefix of the command line.  The problem is that, if the
# compiler name and its initial flags stored in the libtool
# configuration file don't match those in the command line, libtool
# can't decide which configuration to use, and it gives up.  The
# correct solution is to add `--tag CXX' to LTCXXCOMPILE and maybe
# CXXLINK, just after $(LIBTOOL), so that libtool doesn't have to
# attempt to infer which configuration to use.
#
# The second tag argument, `--tag disable-shared` means that libtool
# only compiles each source once, for static objects. In actuality,
# glibcxx_lt_pic_flag and glibcxx_compiler_shared_flag are added to
# the libtool command that is used create the object, which is
# suitable for shared libraries.  The `--tag disable-shared` must be
# placed after --tag CXX lest things CXX undo the affect of
# disable-shared.

# 2) Need to explicitly set LTCXXCOMPILE so that EXTRA_CXX_FLAGS is
# last. (That way, things like -O2 passed down from the toplevel can
# be overridden by --enable-debug and --enable-cxx-flags.)
LTCXXCOMPILE = \
	$(LIBTOOL) --tag CXX \
	$(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) \
	--mode=compile $(CXX) $(INCLUDES) \
	$(AM_CPPFLAGS) $(CPPFLAGS) $(AM_CXXFLAGS) $(CXXFLAGS) $(EXTRA_CXX_FLAGS)

LTLDFLAGS = $(shell $(SHELL) $(top_srcdir)/../libtool-ldflags $(LDFLAGS))

# 3) We'd have a problem when building the shared libstdc++ object if
# the rules automake generates would be used.  We cannot allow g++ to
# be used since this would add -lstdc++ to the link line which of
# course is problematic at this point.  So, we get the top-level
# directory to configure libstdc++-v3 to use gcc as the C++
# compilation driver.
CXXLINK = \
	$(LIBTOOL) --tag CXX \
	$(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) \
	--mode=link $(CXX) \
	$(VTV_CXXLINKFLAGS) \
	$(OPT_LDFLAGS) $(SECTION_LDFLAGS) $(AM_CXXFLAGS) \
	$(LTLDFLAGS) $(LTLIBICONV) \
	-o $@

# Symbol versioning for shared libraries.
# See configure.host and configure.ac for port_specific_symbol_files.
if ENABLE_SYMVERS
libstdc++-symbols.ver:  ${glibcxx_srcdir}/$(SYMVER_FILE) \
		$(port_specific_symbol_files)
	cp ${glibcxx_srcdir}/$(SYMVER_FILE) $@.tmp
	chmod +w $@.tmp
	if test "x$(port_specific_symbol_files)" != x; then \
	  if grep '^# Appended to version file.' \
	       $(port_specific_symbol_files) > /dev/null 2>&1; then \
	    cat $(port_specific_symbol_files) >> $@.tmp; \
	  else \
	    sed -n '1,/DO NOT DELETE/p' $@.tmp > tmp.top; \
	    sed -n '/DO NOT DELETE/,$$p' $@.tmp > tmp.bottom; \
	    cat tmp.top $(port_specific_symbol_files) tmp.bottom > $@.tmp; \
	    rm tmp.top tmp.bottom; \
	  fi; \
	fi
	$(EGREP) -v '^[ 	]*#(#| |$$)' $@.tmp | \
	  $(CC) -E -P -include $(CONFIG_HEADER) - > $@ || (rm -f $@ ; exit 1)
	rm -f $@.tmp

CLEANFILES = libstdc++-symbols.ver

if ENABLE_SYMVERS_GNU
version_arg = -Wl,--version-script=libstdc++-symbols.ver
version_dep = libstdc++-symbols.ver
endif
if ENABLE_SYMVERS_GNU_NAMESPACE
version_arg = -Wl,--version-script=libstdc++-symbols.ver
version_dep = libstdc++-symbols.ver
endif
if ENABLE_SYMVERS_SUN
version_arg = -Wl,-M,libstdc++-symbols.ver-sun
version_dep = libstdc++-symbols.ver-sun
libstdc++-symbols.ver-sun : libstdc++-symbols.ver \
		$(toplevel_srcdir)/contrib/make_sunver.pl \
		$(libstdc___la_OBJECTS) $(libstdc___la_LIBADD)
	CXXFILT="$(CXXFILT)"; export CXXFILT; \
	perl $(toplevel_srcdir)/contrib/make_sunver.pl \
	  libstdc++-symbols.ver \
	  $(libstdc___la_OBJECTS) $(libstdc___la_LIBADD) \
	 > $@ || (rm -f $@ ; exit 1)
endif
if ENABLE_SYMVERS_DARWIN
version_arg = -Wl,-exported_symbols_list,libstdc++-symbols.explist
version_dep = libstdc++-symbols.explist
libstdc++-symbols.explist : libstdc++-symbols.ver \
		${glibcxx_srcdir}/scripts/make_exports.pl \
		$(libstdc___la_OBJECTS) $(libstdc___la_LIBADD)
	perl ${glibcxx_srcdir}/scripts/make_exports.pl \
	  libstdc++-symbols.ver \
	  $(libstdc___la_OBJECTS:%.lo=.libs/%.o) \
	 `echo $(libstdc___la_LIBADD) | \
	    sed 's,/\([^/.]*\)\.la,/.libs/\1.a,g'` \
	 > $@ || (rm -f $@ ; exit 1)
endif

CLEANFILES += $(version_dep)
else
version_arg =
version_dep =
endif


# Control additional build primary rules.
all-once: libstdc++convenience.la $(STAMP_DEBUG)
install-data-once: $(STAMP_INSTALL_DEBUG)

all-local: all-once
install-data-local: install-data-once
clean-local:
	rm -rf libstdc++convenience.la stamp* $(CLEAN_DEBUG)

# Make a non-installed convenience library, so that --disable-static
# may work.
libstdc++convenience.la: $(toolexeclib_LTLIBRARIES)
	$(CXXLINK) $(libstdc___la_LIBADD) $(LIBS); \
	if test ! -f .libs/libstdc++.a; then \
	  cp .libs/libstdc++convenience.a .libs/libstdc++.a; \
	fi; \
	date > stamp-libstdc++convenience;

# Added rules.
# 1 debug library
# 2 supra-convenience library
if GLIBCXX_BUILD_DEBUG
STAMP_DEBUG = build-debug
STAMP_INSTALL_DEBUG = install-debug
CLEAN_DEBUG = debug
else
STAMP_DEBUG =
STAMP_INSTALL_DEBUG =
CLEAN_DEBUG =
endif

# Build a debug variant.

# Take care to fix all possibly-relative paths.
debug/%/Makefile: %/Makefile
	$(MKDIR_P) $(dir $@)
	sed -e 's/top_builddir = \.\./top_builddir = ..\/../' \
	    -e 's/top_build_prefix = \.\./top_build_prefix = ..\/../' \
	    -e 's/srcdir = \.\./srcdir = ..\/../' \
	    -e 's/VPATH = \.\./VPATH = ..\/../' \
	    -e 's/glibcxx_basedir = \.\./glibcxx_basedir = ..\/../' \
	    -e 's/MKDIR_P = \.\./MKDIR_P = ..\/../' \
	  < $< > $@

stamp-debug: $(foreach dir,. $(SUBDIRS),debug/$(dir)/Makefile)
	mv debug/Makefile debug/Makefile.tmp
	sed -e 's,all-local: all-once,all-local:,' \
	    -e 's,install-data-local: install-data-once,install-data-local:,' \
	    -e '/vpath/!s,src/c,src/debug/c,' \
	  < debug/Makefile.tmp > debug/Makefile
	rm -f debug/Makefile.tmp
	date > stamp-debug;

.SECONDARY: $(foreach dir,. $(SUBDIRS),debug/$(dir)/Makefile)

if ENABLE_BACKTRACE
backtrace_supported_h = $(backtrace_dir)/backtrace-supported.h
debug_backtrace_supported_h = debug/$(backtrace_supported_h)
$(debug_backtrace_supported_h): $(backtrace_supported_h) stamp-debug
	cp $< $@
else
debug_backtrace_supported_h =
endif

build-debug: stamp-debug $(debug_backtrace_supported_h)
	  $(MAKE) -C debug CXXFLAGS='$(DEBUG_FLAGS)' \
	    toolexeclibdir=$(glibcxx_toolexeclibdir)/debug all

# Install debug library.
install-debug: build-debug
	$(MAKE) -C debug CXXFLAGS='$(DEBUG_FLAGS)' \
	  toolexeclibdir=$(glibcxx_toolexeclibdir)/debug install