libstdc++-v3/src/c++23/Makefile.am - gcc - Git at Google


            
            ## Makefile for the C++23 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


            # Convenience library for C++23 runtime.

            
            # This libc++23convenience.la one isn't linked into libstdc++.la yet,

            
            # so build an additional libmodulesconvenience.la which is linked in.

            
            noinst_LTLIBRARIES = libc++23convenience.la libmodulesconvenience.la


            # Module std support.

            
            # Let's install the interface units in the bits subdirectory.

            
            # We also compile them and include them in libmodulesconvenience.la

            
            toolexeclib_DATA = libstdc++.modules.json

            
            includebitsdir = $(gxx_include_dir)/bits

            
            includebits_DATA = std.cc std.compat.cc


            # The manifest to be installed uses the relative path between install dirs.

            
            libstdc++.modules.json: libstdc++.modules.json.in

            
            	relpath=$$($(toplevel_srcdir)/contrib/relpath.sh \

            
            		    $(toolexeclibdir) \

            
            		    $(includebitsdir)) && \

            
            	sed "s,@MODPATH@,$$relpath," $< > $@


            # The uninstalled manifest uses the relative path to builddir.

            
            stamp-module-manifest: libstdc++.modules.json.in

            
            	@-mkdir -p ../.libs

            
            	sed "s,@MODPATH@,../c++23," $< \

            
            	  > ../.libs/libstdc++.modules.json

            
            	@$(STAMP) $@


            # Add the C library exports to both modules.

            
            std.cc: std.cc.in std-clib.cc.in

            
            	cat $^ > $@

            
            std.compat.cc: std.compat.cc.in std-clib.cc.in

            
            	cat $^ > $@


            # Also put the interface units in the build-includes bits directory.

            
            stamp-modules-bits: $(includebits_DATA)

            
            	@-mkdir -p $(top_builddir)/include/bits

            
            	-for f in $(includebits_DATA); do \

            
            	  $(LN_S) $(abs_builddir)/$$f $(top_builddir)/include/bits; \

            
            	done 2>/dev/null

            
            	@$(STAMP) $@


            all-local: stamp-module-manifest stamp-modules-bits


            clean-local:

            
            	rm -rf stamp* libstdc++.modules.json std.cc std.compat.cc gcm.cache


            headers =


            if ENABLE_EXTERN_TEMPLATE

            
            # XTEMPLATE_FLAGS = -fno-implicit-templates

            
            inst_sources =

            
            else

            
            # XTEMPLATE_FLAGS =

            
            inst_sources =

            
            endif


            sources = stacktrace.cc print.cc


            vpath % $(top_srcdir)/src/c++23


            if GLIBCXX_HOSTED

            
            libc__23convenience_la_SOURCES = $(sources)  $(inst_sources)

            
            else

            
            libc__23convenience_la_SOURCES =

            
            endif


            libmodulesconvenience_la_SOURCES = std.cc std.compat.cc


            # Use C++26 so that std::filebuf::native_handle() is available.

            
            print.lo: print.cc

            
            	$(LTCXXCOMPILE) -std=gnu++26 -c $<

            
            print.o: print.cc

            
            	$(CXXCOMPILE) -std=gnu++26 -c $<


            MODULES_FLAGS = -isystem ${glibcxx_srcdir}/include/backward -fmodules \

            
            	-Wno-unknown-pragmas


            # These go into libmodulesconvenience.la and are linked into libstdc++

            
            std.lo: std.cc

            
            	if ! $(LTCXXCOMPILE) $(MODULES_FLAGS) -c $< ; then \

            
            	  echo "Cannot compile std module" >&2; \

            
            	  echo "Module initialization function will be missing" >&2; \

            
            	  echo > $<.tmp && mv $<.tmp $< && \

            
            	  $(LTCXXCOMPILE) $(MODULES_FLAGS) -c $< ; \

            
            	fi

            
            std.o: std.cc

            
            	if ! $(CXXCOMPILE) $(MODULES_FLAGS) -c $< ; then \

            
            	  echo "Cannot compile std module" >&2; \

            
            	  echo "Module initialization function will be missing" >&2; \

            
            	  echo > $<.tmp && mv $<.tmp $< && \

            
            	  $(CXXCOMPILE) $(MODULES_FLAGS) -c $< ; \

            
            	fi

            
            std.compat.lo: std.compat.cc std.lo

            
            	if ! $(LTCXXCOMPILE) $(MODULES_FLAGS) -c $< ; then \

            
            	  echo "Cannot compile std.compat module" >&2; \

            
            	  echo "Module initialization function will be missing" >&2; \

            
            	  echo > $<.tmp && mv $<.tmp $< && \

            
            	  $(LTCXXCOMPILE) $(MODULES_FLAGS) -c $< ; \

            
            	fi

            
            std.compat.o: std.compat.cc std.o

            
            	if ! $(CXXCOMPILE) $(MODULES_FLAGS) -c $< ; then \

            
            	  echo "Cannot compile std.compat module" >&2; \

            
            	  echo "Module initialization function will be missing" >&2; \

            
            	  echo > $<.tmp && mv $<.tmp $< && \

            
            	  $(CXXCOMPILE) $(MODULES_FLAGS) -c $< ; \

            
            	fi


            # AM_CXXFLAGS needs to be in each subdirectory 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 = \

            
            	-std=gnu++23 \

            
            	$(glibcxx_lt_pic_flag) $(glibcxx_compiler_shared_flag) \

            
            	$(XTEMPLATE_FLAGS) $(VTV_CXXFLAGS) \

            
            	$(WARN_CXXFLAGS) $(OPTIMIZE_CXXFLAGS) $(CONFIG_CXXFLAGS) \

            
            	-fimplicit-templates


            AM_MAKEFLAGS = \

            
            	"gxx_include_dir=$(gxx_include_dir)"


            # 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.)

            
            LTCXXCOMPILE = \

            
            	$(LIBTOOL) --tag CXX --tag disable-shared \

            
            	$(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) \

            
            	--mode=compile $(CXX) $(TOPLEVEL_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 --tag disable-shared \

            
            	$(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) \

            
            	--mode=link $(CXX) \

            
            	$(VTV_CXXLINKFLAGS) \

            
            	$(OPT_LDFLAGS) $(SECTION_LDFLAGS) $(AM_CXXFLAGS) $(LTLDFLAGS) -o $@
	## Makefile for the C++23 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

	# Convenience library for C++23 runtime.
	# This libc++23convenience.la one isn't linked into libstdc++.la yet,
	# so build an additional libmodulesconvenience.la which is linked in.
	noinst_LTLIBRARIES = libc++23convenience.la libmodulesconvenience.la

	# Module std support.
	# Let's install the interface units in the bits subdirectory.
	# We also compile them and include them in libmodulesconvenience.la
	toolexeclib_DATA = libstdc++.modules.json
	includebitsdir = $(gxx_include_dir)/bits
	includebits_DATA = std.cc std.compat.cc

	# The manifest to be installed uses the relative path between install dirs.
	libstdc++.modules.json: libstdc++.modules.json.in
	relpath=$$($(toplevel_srcdir)/contrib/relpath.sh \
	$(toolexeclibdir) \
	$(includebitsdir)) && \
	sed "s,@MODPATH@,$$relpath," $< > $@

	# The uninstalled manifest uses the relative path to builddir.
	stamp-module-manifest: libstdc++.modules.json.in
	@-mkdir -p ../.libs
	sed "s,@MODPATH@,../c++23," $< \
	> ../.libs/libstdc++.modules.json
	@$(STAMP) $@

	# Add the C library exports to both modules.
	std.cc: std.cc.in std-clib.cc.in
	cat $^ > $@
	std.compat.cc: std.compat.cc.in std-clib.cc.in
	cat $^ > $@

	# Also put the interface units in the build-includes bits directory.
	stamp-modules-bits: $(includebits_DATA)
	@-mkdir -p $(top_builddir)/include/bits
	-for f in $(includebits_DATA); do \
	$(LN_S) $(abs_builddir)/$$f $(top_builddir)/include/bits; \
	done 2>/dev/null
	@$(STAMP) $@

	all-local: stamp-module-manifest stamp-modules-bits

	clean-local:
	rm -rf stamp* libstdc++.modules.json std.cc std.compat.cc gcm.cache

	headers =

	if ENABLE_EXTERN_TEMPLATE
	# XTEMPLATE_FLAGS = -fno-implicit-templates
	inst_sources =
	else
	# XTEMPLATE_FLAGS =
	inst_sources =
	endif

	sources = stacktrace.cc print.cc

	vpath % $(top_srcdir)/src/c++23


	if GLIBCXX_HOSTED
	libc__23convenience_la_SOURCES = $(sources) $(inst_sources)
	else
	libc__23convenience_la_SOURCES =
	endif

	libmodulesconvenience_la_SOURCES = std.cc std.compat.cc

	# Use C++26 so that std::filebuf::native_handle() is available.
	print.lo: print.cc
	$(LTCXXCOMPILE) -std=gnu++26 -c $<
	print.o: print.cc
	$(CXXCOMPILE) -std=gnu++26 -c $<

	MODULES_FLAGS = -isystem ${glibcxx_srcdir}/include/backward -fmodules \
	-Wno-unknown-pragmas

	# These go into libmodulesconvenience.la and are linked into libstdc++
	std.lo: std.cc
	if ! $(LTCXXCOMPILE) $(MODULES_FLAGS) -c $< ; then \
	echo "Cannot compile std module" >&2; \
	echo "Module initialization function will be missing" >&2; \
	echo > $<.tmp && mv $<.tmp $< && \
	$(LTCXXCOMPILE) $(MODULES_FLAGS) -c $< ; \
	fi
	std.o: std.cc
	if ! $(CXXCOMPILE) $(MODULES_FLAGS) -c $< ; then \
	echo "Cannot compile std module" >&2; \
	echo "Module initialization function will be missing" >&2; \
	echo > $<.tmp && mv $<.tmp $< && \
	$(CXXCOMPILE) $(MODULES_FLAGS) -c $< ; \
	fi
	std.compat.lo: std.compat.cc std.lo
	if ! $(LTCXXCOMPILE) $(MODULES_FLAGS) -c $< ; then \
	echo "Cannot compile std.compat module" >&2; \
	echo "Module initialization function will be missing" >&2; \
	echo > $<.tmp && mv $<.tmp $< && \
	$(LTCXXCOMPILE) $(MODULES_FLAGS) -c $< ; \
	fi
	std.compat.o: std.compat.cc std.o
	if ! $(CXXCOMPILE) $(MODULES_FLAGS) -c $< ; then \
	echo "Cannot compile std.compat module" >&2; \
	echo "Module initialization function will be missing" >&2; \
	echo > $<.tmp && mv $<.tmp $< && \
	$(CXXCOMPILE) $(MODULES_FLAGS) -c $< ; \
	fi

	# AM_CXXFLAGS needs to be in each subdirectory 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 = \
	-std=gnu++23 \
	$(glibcxx_lt_pic_flag) $(glibcxx_compiler_shared_flag) \
	$(XTEMPLATE_FLAGS) $(VTV_CXXFLAGS) \
	$(WARN_CXXFLAGS) $(OPTIMIZE_CXXFLAGS) $(CONFIG_CXXFLAGS) \
	-fimplicit-templates

	AM_MAKEFLAGS = \
	"gxx_include_dir=$(gxx_include_dir)"

	# 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.)
	LTCXXCOMPILE = \
	$(LIBTOOL) --tag CXX --tag disable-shared \
	$(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) \
	--mode=compile $(CXX) $(TOPLEVEL_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 --tag disable-shared \
	$(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) \
	--mode=link $(CXX) \
	$(VTV_CXXLINKFLAGS) \
	$(OPT_LDFLAGS) $(SECTION_LDFLAGS) $(AM_CXXFLAGS) $(LTLDFLAGS) -o $@