libstdc++-v3/src/c++17/Makefile.am

   1 ## Makefile for the C++17 sources of the GNU C++ Standard library.
   2 ##
   3 ## Copyright (C) 1997-2022 Free Software Foundation, Inc.
   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 if ENABLE_DUAL_ABI
  31 extra_string_inst_sources = cow-string-inst.cc
  32 extra_fs_sources = \
  33         cow-fs_dir.cc \
  34         cow-fs_ops.cc \
  35         cow-fs_path.cc
  36 else
  37 extra_string_inst_sources =
  38 extra_fs_sources =
  39 endif
  40
  41 if ENABLE_EXTERN_TEMPLATE
  42 # XTEMPLATE_FLAGS = -fno-implicit-templates
  43 inst_sources = \
  44         ostream-inst.cc \
  45         string-inst.cc \
  46         $(extra_string_inst_sources)
  47 else
  48 # XTEMPLATE_FLAGS =
  49 inst_sources =
  50 endif
  51
  52 sources = \
  53         floating_from_chars.cc \
  54         floating_to_chars.cc \
  55         fs_dir.cc \
  56         fs_ops.cc \
  57         fs_path.cc \
  58         memory_resource.cc \
  59         $(extra_fs_sources)
  60
  61 vpath % $(top_srcdir)/src/c++17
  62
  63 libc__17convenience_la_SOURCES = $(sources)  $(inst_sources)
  64
  65 if GLIBCXX_LDBL_ALT128_COMPAT
  66 floating_from_chars.lo: floating_from_chars.cc
  67         $(LTCXXCOMPILE) -mabi=ibmlongdouble $(LONG_DOUBLE_128_FLAGS) -c $<
  68 floating_from_chars.o: floating_from_chars.cc
  69         $(CXXCOMPILE) -mabi=ibmlongdouble $(LONG_DOUBLE_128_FLAGS) -c $<
  70 floating_to_chars.lo: floating_to_chars.cc
  71         $(LTCXXCOMPILE) -mabi=ibmlongdouble $(LONG_DOUBLE_128_FLAGS) -c $<
  72 floating_to_chars.o: floating_to_chars.cc
  73         $(CXXCOMPILE) -mabi=ibmlongdouble $(LONG_DOUBLE_128_FLAGS) -c $<
  74 endif
  75
  76 # AM_CXXFLAGS needs to be in each subdirectory so that it can be
  77 # modified in a per-library or per-sub-library way.  Need to manually
  78 # set this option because CONFIG_CXXFLAGS has to be after
  79 # OPTIMIZE_CXXFLAGS on the compile line so that -O2 can be overridden
  80 # as the occasion calls for it.
  81 AM_CXXFLAGS = \
  82         -std=gnu++17 \
  83         $(glibcxx_lt_pic_flag) $(glibcxx_compiler_shared_flag) \
  84         $(XTEMPLATE_FLAGS) $(VTV_CXXFLAGS) \
  85         $(WARN_CXXFLAGS) $(OPTIMIZE_CXXFLAGS) $(CONFIG_CXXFLAGS) \
  86         -fimplicit-templates
  87
  88 AM_MAKEFLAGS = \
  89         "gxx_include_dir=$(gxx_include_dir)"
  90
  91 # Libtool notes
  92
  93 # 1) In general, libtool expects an argument such as `--tag=CXX' when
  94 # using the C++ compiler, because that will enable the settings
  95 # detected when C++ support was being configured.  However, when no
  96 # such flag is given in the command line, libtool attempts to figure
  97 # it out by matching the compiler name in each configuration section
  98 # against a prefix of the command line.  The problem is that, if the
  99 # compiler name and its initial flags stored in the libtool
 100 # configuration file don't match those in the command line, libtool
 101 # can't decide which configuration to use, and it gives up.  The
 102 # correct solution is to add `--tag CXX' to LTCXXCOMPILE and maybe
 103 # CXXLINK, just after $(LIBTOOL), so that libtool doesn't have to
 104 # attempt to infer which configuration to use.
 105 #
 106 # The second tag argument, `--tag disable-shared` means that libtool
 107 # only compiles each source once, for static objects. In actuality,
 108 # glibcxx_lt_pic_flag and glibcxx_compiler_shared_flag are added to
 109 # the libtool command that is used create the object, which is
 110 # suitable for shared libraries.  The `--tag disable-shared` must be
 111 # placed after --tag CXX lest things CXX undo the affect of
 112 # disable-shared.
 113
 114 # 2) Need to explicitly set LTCXXCOMPILE so that EXTRA_CXX_FLAGS is
 115 # last. (That way, things like -O2 passed down from the toplevel can
 116 # be overridden by --enable-debug.)
 117 LTCXXCOMPILE = \
 118         $(LIBTOOL) --tag CXX --tag disable-shared \
 119         $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) \
 120         --mode=compile $(CXX) $(TOPLEVEL_INCLUDES) \
 121         $(AM_CPPFLAGS) $(CPPFLAGS) $(AM_CXXFLAGS) $(CXXFLAGS) $(EXTRA_CXX_FLAGS)
 122
 123 LTLDFLAGS = $(shell $(SHELL) $(top_srcdir)/../libtool-ldflags $(LDFLAGS))
 124
 125 # 3) We'd have a problem when building the shared libstdc++ object if
 126 # the rules automake generates would be used.  We cannot allow g++ to
 127 # be used since this would add -lstdc++ to the link line which of
 128 # course is problematic at this point.  So, we get the top-level
 129 # directory to configure libstdc++-v3 to use gcc as the C++
 130 # compilation driver.
 131 CXXLINK = \
 132         $(LIBTOOL) --tag CXX --tag disable-shared \
 133         $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) \
 134         --mode=link $(CXX) \
 135         $(VTV_CXXLINKFLAGS) \
 136         $(OPT_LDFLAGS) $(SECTION_LDFLAGS) $(AM_CXXFLAGS) $(LTLDFLAGS) -o $@