gcc/libstdc++-v3/libsupc++/Makefile.am
Jonathan Wakely 68c2e9e923 libstdc++: Fix and simplify freestanding configuration [PR103866]
This fixes the --disable-hosted-libstdcxx build so that it works with
--without-headers. Currently you need to also use --with-newlib, which
is confusing for users who aren't actually using newlib.

The AM_PROG_LIBTOOL checks are currently skipped for --with-newlib and
--with-avrlibc builds, with this change they are also skipped when using
--without-headers.  It would be nice if using --disable-hosted-libstdcxx
automatically skipped those checks, but GLIBCXX_ENABLE_HOSTED comes too
late to make the AM_PROG_LIBTOOL checks depend on $is_hosted.

The checks for EOF, SEEK_CUR etc. cause the build to fail if there is no
<stdio.h> available.  Unlike most headers, which get a HAVE_FOO_H macro,
<stdio.h> is in autoconf's default includes, so every check tries to
include it unconditionally. This change skips those checks for
freestanding builds.

Similarly, the checks for <stdint.h> types done by GCC_HEADER_STDINT try
to include <stdio.h> and fail for --without-headers builds. This change
skips the use of GCC_HEADER_STDINT for freestanding. We can probably
stop using GCC_HEADER_STDINT entirely, since only one file uses the
gstdint.h header that is generated, and that could easily be changed to
use <stdint.h> instead. That can wait for stage 1.

We also need to skip the GLIBCXX_CROSSCONFIG stage if --without-headers
was used, since we don't have any of the functions it deals with.

The end result of the changes above is that it should not be necessary
for a --disable-hosted-libstdcxx --without-headers build to also use
--with-newlib.

Finally, compile libsupc++ with -ffreestanding when --without-headers is
used, so that <stdint.h> will use <gcc-stdint.h> instead of expecting it
to come from libc.

libstdc++-v3/ChangeLog:

	PR libstdc++/103866
	* acinclude.m4 (GLIBCXX_COMPUTE_STDIO_INTEGER_CONSTANTS): Do
	nothing for freestanding builds.
	(GLIBCXX_ENABLE_HOSTED): Define FREESTANDING_FLAGS.
	* configure.ac: Do not use AC_LIBTOOL_DLOPEN when configured
	with --without-headers.  Do not use GCC_HEADER_STDINT for
	freestanding builds.
	* libsupc++/Makefile.am (HOSTED_CXXFLAGS): Use -ffreestanding
	for freestanding builds.
	* configure: Regenerate.
	* Makefile.in: Regenerate.
	* doc/Makefile.in: Regenerate.
	* include/Makefile.in: Regenerate.
	* libsupc++/Makefile.in: Regenerate.
	* po/Makefile.in: Regenerate.
	* python/Makefile.in: Regenerate.
	* src/Makefile.in: Regenerate.
	* src/c++11/Makefile.in: Regenerate.
	* src/c++17/Makefile.in: Regenerate.
	* src/c++20/Makefile.in: Regenerate.
	* src/c++98/Makefile.in: Regenerate.
	* src/filesystem/Makefile.in: Regenerate.
	* testsuite/Makefile.in: Regenerate.
2022-01-10 12:18:14 +00:00

253 lines
7.8 KiB
Makefile

## Makefile for the GNU C++ Support library.
##
## Copyright (C) 2000-2022 Free Software Foundation, Inc.
##
## Process this file with automake to produce Makefile.in.
##
## This file is part of GCC.
##
## GCC 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.
##
## GCC 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 GCC; see the file COPYING3. If not see
## <http://www.gnu.org/licenses/>.
include $(top_srcdir)/fragment.am
# Need this library to both be part of libstdc++.a, and installed
# separately too.
# 1) separate libsupc++.la
toolexeclib_LTLIBRARIES = libsupc++.la
# 2) integrated libsupc++convenience.la that is to be a part of libstdc++.a
noinst_LTLIBRARIES = libsupc++convenience.la
std_HEADERS = \
compare cxxabi.h exception initializer_list new typeinfo
bits_HEADERS = \
atomic_lockfree_defines.h cxxabi_forced.h \
exception_defines.h exception_ptr.h hash_bytes.h nested_exception.h exception.h cxxabi_init_exception.h
headers = $(std_HEADERS) $(bits_HEADERS)
if GLIBCXX_HOSTED
c_sources = \
cp-demangle.c
endif
sources = \
array_type_info.cc \
atexit_arm.cc \
atexit_thread.cc \
atomicity.cc \
bad_alloc.cc \
bad_array_length.cc \
bad_array_new.cc \
bad_cast.cc \
bad_typeid.cc \
class_type_info.cc \
del_op.cc \
del_ops.cc \
del_opnt.cc \
del_opv.cc \
del_opvs.cc \
del_opvnt.cc \
dyncast.cc \
eh_alloc.cc \
eh_arm.cc \
eh_aux_runtime.cc \
eh_call.cc \
eh_catch.cc \
eh_exception.cc \
eh_globals.cc \
eh_personality.cc \
eh_ptr.cc \
eh_term_handler.cc \
eh_terminate.cc \
eh_tm.cc \
eh_throw.cc \
eh_type.cc \
eh_unex_handler.cc \
enum_type_info.cc \
function_type_info.cc \
fundamental_type_info.cc \
guard.cc \
guard_error.cc \
hash_bytes.cc \
nested_exception.cc \
new_handler.cc \
new_op.cc \
new_opnt.cc \
new_opv.cc \
new_opvnt.cc \
new_opa.cc \
new_opant.cc \
new_opva.cc \
new_opvant.cc \
del_opa.cc \
del_opant.cc \
del_opsa.cc \
del_opva.cc \
del_opvant.cc \
del_opvsa.cc \
pbase_type_info.cc \
pmem_type_info.cc \
pointer_type_info.cc \
pure.cc \
si_class_type_info.cc \
tinfo.cc \
tinfo2.cc \
vec.cc \
vmi_class_type_info.cc \
vterminate.cc
if ENABLE_VTABLE_VERIFY
if !VTV_CYGMIN
vtv_sources = \
vtv_stubs.cc
endif
endif
libsupc___la_SOURCES = $(sources) $(c_sources) $(vtv_sources)
libsupc__convenience_la_SOURCES = $(sources) $(c_sources) $(vtv_sources)
cp-demangle.c:
rm -f $@
$(LN_S) $(toplevel_srcdir)/libiberty/cp-demangle.c $@
cp-demangle.lo: cp-demangle.c
$(LTCOMPILE) -DIN_GLIBCPP_V3 -Wno-error -c $<
cp-demangle.o: cp-demangle.c
$(C_COMPILE) -DIN_GLIBCPP_V3 -Wno-error -c $<
atomicity_file = ${glibcxx_srcdir}/$(ATOMICITY_SRCDIR)/atomicity.h
atomicity.cc: ${atomicity_file}
$(LN_S) ${atomicity_file} ./atomicity.cc || true
# 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 call for it.
AM_CXXFLAGS = \
$(glibcxx_lt_pic_flag) $(glibcxx_compiler_shared_flag) \
$(XTEMPLATE_FLAGS) $(FREESTANDING_FLAGS) \
$(WARN_CXXFLAGS) $(OPTIMIZE_CXXFLAGS) $(CONFIG_CXXFLAGS)
AM_MAKEFLAGS = \
"gxx_include_dir=$(gxx_include_dir)"
# Use special rules for pulling things out of libiberty. These
# objects should be compiled with the "C" compiler, not the C++
# compiler, and also should not use the C++ includes.
C_INCLUDES = -I.. -I$(toplevel_srcdir)/libiberty -I$(toplevel_srcdir)/include
C_COMPILE = \
$(CC) $(DEFS) $(C_INCLUDES) \
$(AM_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) $(EXTRA_CFLAGS)
# LTCOMPILE is copied from LTCXXCOMPILE below.
LTCOMPILE = $(LIBTOOL) --tag CC --tag disable-shared $(LIBTOOLFLAGS) --mode=compile \
$(CC) $(DEFS) $(C_INCLUDES) \
$(glibcxx_lt_pic_flag) $(glibcxx_compiler_shared_flag) \
$(AM_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) $(EXTRA_CFLAGS)
# 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) \
$(OPT_LDFLAGS) $(SECTION_LDFLAGS) $(AM_CXXFLAGS) $(LTLDFLAGS) -o $@
# Install notes
# We have to have rules modified from the default to counteract SUN make
# prepending each of $(*_HEADERS) with VPATH below.
stddir = $(gxx_include_dir)
bitsdir = $(gxx_include_dir)/bits
install-stdHEADERS: $(std_HEADERS)
@$(NORMAL_INSTALL)
$(mkinstalldirs) $(DESTDIR)$(stddir)
@list='$(std_HEADERS)'; for p in $$list; do \
q=`echo $$p | sed -e 's,.*/,,'`; \
if test -f "$$p"; then d= ; else d="$(srcdir)/"; fi; \
echo " $(INSTALL_DATA) $$d$$p $(DESTDIR)$(stddir)/$$q"; \
$(INSTALL_DATA) $$d$$p $(DESTDIR)$(stddir)/$$q; \
done
install-bitsHEADERS: $(bits_HEADERS)
@$(NORMAL_INSTALL)
$(mkinstalldirs) $(DESTDIR)$(bitsdir)
@list='$(bits_HEADERS)'; for p in $$list; do \
q=`echo $$p | sed -e 's,.*/,,'`; \
if test -f "$$p"; then d= ; else d="$(srcdir)/"; fi; \
echo " $(INSTALL_DATA) $$d$$p $(DESTDIR)$(bitsdir)/$$q"; \
$(INSTALL_DATA) $$d$$p $(DESTDIR)$(bitsdir)/$$q; \
done
uninstall-stdHEADERS:
@$(NORMAL_UNINSTALL)
list='$(std_HEADERS)'; for p in $$list; do \
q=`echo $$p | sed -e 's,.*/,,'`; \
rm -f $(DESTDIR)$(stddir)/$$q; \
done
uninstall-bitsHEADERS:
@$(NORMAL_UNINSTALL)
list='$(bits_HEADERS)'; for p in $$list; do \
q=`echo $$p | sed -e 's,.*/,,'`; \
rm -f $(DESTDIR)$(bitsdir)/$$q; \
done
# By adding these files here, automake will remove them for 'make clean'
CLEANFILES = stamp-*