[thirdparty/gcc.git] / libstdc++-v3 / src / c++17 / Makefile.am

## Makefile for the C++17 sources of the GNU C++ Standard library.
##
## Copyright (C) 1997-2019 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++17 runtime.
noinst_LTLIBRARIES = libc++17convenience.la

headers =

sources = \
	memory_resource.cc

if ENABLE_DUAL_ABI
extra_string_inst_sources =
else
extra_string_inst_sources =
endif

if ENABLE_EXTERN_TEMPLATE
# XTEMPLATE_FLAGS = -fno-implicit-templates
inst_sources = \
	$(extra_string_inst_sources)
else
# XTEMPLATE_FLAGS =
inst_sources =
endif

vpath % $(top_srcdir)/src/c++17

libc__17convenience_la_SOURCES = $(sources)  $(inst_sources)

# 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++17 \
	$(glibcxx_lt_pic_flag) $(glibcxx_compiler_shared_flag) \
	$(XTEMPLATE_FLAGS) $(VTV_CXXFLAGS) \
	$(WARN_CXXFLAGS) $(OPTIMIZE_CXXFLAGS) $(CONFIG_CXXFLAGS)

AM_MAKEFLAGS = \
	"gxx_include_dir=$(gxx_include_dir)"

memory_resource.lo: memory_resource.cc
	$(LTCXXCOMPILE) -fimplicit-templates -c $< -o $@
memory_resource.o: memory_resource.cc
	$(CXXCOMPILE) -fimplicit-templates -c $< -o $@

# 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 $@
Commit	Line	Data
51a5511d	1	## Makefile for the C++17 sources of the GNU C++ Standard library.
51a5511d	2	##
fbd26352	3	## Copyright (C) 1997-2019 Free Software Foundation, Inc.
51a5511d	4	##
	5	## This file is part of the libstdc++ version 3 distribution.
	6	## Process this file with automake to produce Makefile.in.
	7
	8	## This file is part of the GNU ISO C++ Library. This library is free
	9	## software; you can redistribute it and/or modify it under the
	10	## terms of the GNU General Public License as published by the
	11	## Free Software Foundation; either version 3, or (at your option)
	12	## any later version.
	13
	14	## This library is distributed in the hope that it will be useful,
	15	## but WITHOUT ANY WARRANTY; without even the implied warranty of
	16	## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	17	## GNU General Public License for more details.
	18
	19	## You should have received a copy of the GNU General Public License along
	20	## with this library; see the file COPYING3. If not see
	21	## <http://www.gnu.org/licenses/>.
	22
	23	include $(top_srcdir)/fragment.am
	24
	25	# Convenience library for C++17 runtime.
	26	noinst_LTLIBRARIES = libc++17convenience.la
	27
	28	headers =
	29
	30	sources = \
	31	memory_resource.cc
	32
	33	if ENABLE_DUAL_ABI
	34	extra_string_inst_sources =
	35	else
	36	extra_string_inst_sources =
	37	endif
	38
	39	if ENABLE_EXTERN_TEMPLATE
	40	# XTEMPLATE_FLAGS = -fno-implicit-templates
	41	inst_sources = \
	42	$(extra_string_inst_sources)
	43	else
	44	# XTEMPLATE_FLAGS =
	45	inst_sources =
	46	endif
	47
	48	vpath % $(top_srcdir)/src/c++17
	49
	50	libc__17convenience_la_SOURCES = $(sources) $(inst_sources)
	51
	52	# AM_CXXFLAGS needs to be in each subdirectory so that it can be
	53	# modified in a per-library or per-sub-library way. Need to manually
	54	# set this option because CONFIG_CXXFLAGS has to be after
	55	# OPTIMIZE_CXXFLAGS on the compile line so that -O2 can be overridden
	56	# as the occasion calls for it.
	57	AM_CXXFLAGS = \
	58	-std=gnu++17 \
	59	$(glibcxx_lt_pic_flag) $(glibcxx_compiler_shared_flag) \
	60	$(XTEMPLATE_FLAGS) $(VTV_CXXFLAGS) \
	61	$(WARN_CXXFLAGS) $(OPTIMIZE_CXXFLAGS) $(CONFIG_CXXFLAGS)
	62
	63	AM_MAKEFLAGS = \
	64	"gxx_include_dir=$(gxx_include_dir)"
	65
76b49a08	66	memory_resource.lo: memory_resource.cc
	67	$(LTCXXCOMPILE) -fimplicit-templates -c $< -o $@
	68	memory_resource.o: memory_resource.cc
	69	$(CXXCOMPILE) -fimplicit-templates -c $< -o $@
	70
51a5511d	71	# Libtool notes
	72
	73	# 1) In general, libtool expects an argument such as `--tag=CXX' when
	74	# using the C++ compiler, because that will enable the settings
	75	# detected when C++ support was being configured. However, when no
	76	# such flag is given in the command line, libtool attempts to figure
	77	# it out by matching the compiler name in each configuration section
	78	# against a prefix of the command line. The problem is that, if the
	79	# compiler name and its initial flags stored in the libtool
	80	# configuration file don't match those in the command line, libtool
	81	# can't decide which configuration to use, and it gives up. The
	82	# correct solution is to add `--tag CXX' to LTCXXCOMPILE and maybe
	83	# CXXLINK, just after $(LIBTOOL), so that libtool doesn't have to
	84	# attempt to infer which configuration to use.
	85	#
	86	# The second tag argument, `--tag disable-shared` means that libtool
	87	# only compiles each source once, for static objects. In actuality,
	88	# glibcxx_lt_pic_flag and glibcxx_compiler_shared_flag are added to
	89	# the libtool command that is used create the object, which is
	90	# suitable for shared libraries. The `--tag disable-shared` must be
	91	# placed after --tag CXX lest things CXX undo the affect of
	92	# disable-shared.
	93
	94	# 2) Need to explicitly set LTCXXCOMPILE so that EXTRA_CXX_FLAGS is
	95	# last. (That way, things like -O2 passed down from the toplevel can
	96	# be overridden by --enable-debug.)
	97	LTCXXCOMPILE = \
	98	$(LIBTOOL) --tag CXX --tag disable-shared \
	99	$(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) \
	100	--mode=compile $(CXX) $(TOPLEVEL_INCLUDES) \
	101	$(AM_CPPFLAGS) $(CPPFLAGS) $(AM_CXXFLAGS) $(CXXFLAGS) $(EXTRA_CXX_FLAGS)
	102
	103	LTLDFLAGS = $(shell $(SHELL) $(top_srcdir)/../libtool-ldflags $(LDFLAGS))
	104
	105	# 3) We'd have a problem when building the shared libstdc++ object if
	106	# the rules automake generates would be used. We cannot allow g++ to
	107	# be used since this would add -lstdc++ to the link line which of
	108	# course is problematic at this point. So, we get the top-level
	109	# directory to configure libstdc++-v3 to use gcc as the C++
	110	# compilation driver.
	111	CXXLINK = \
	112	$(LIBTOOL) --tag CXX --tag disable-shared \
	113	$(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) \
	114	--mode=link $(CXX) \
	115	$(VTV_CXXLINKFLAGS) \
	116	$(OPT_LDFLAGS) $(SECTION_LDFLAGS) $(AM_CXXFLAGS) $(LTLDFLAGS) -o $@