libstdc++-v3/src/filesystem/Makefile.am

   1 ## Makefile for the GNU C++ Filesystem library.
   2 ##
   3 ## Copyright (C) 2014-2018 Free Software Foundation, Inc.
   4 ##
   5 ## Process this file with automake to produce Makefile.in.
   6 ##
   7 ## This file is part of GCC.
   8 ##
   9 ## GCC is free software; you can redistribute it and/or modify
  10 ## it under the terms of the GNU General Public License as published by
  11 ## the Free Software Foundation; either version 3, or (at your option)
  12 ## any later version.
  13 ##
  14 ## GCC 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
  20 ## along with GCC; see the file COPYING3.  If not see
  21 ## <http://www.gnu.org/licenses/>.
  22
  23 include $(top_srcdir)/fragment.am
  24
  25 toolexeclib_LTLIBRARIES = libstdc++fs.la
  26
  27 headers =
  28
  29 if ENABLE_DUAL_ABI
  30 cxx11_abi_sources = \
  31         cow-dir.cc \
  32         cow-ops.cc \
  33         cow-path.cc \
  34         cow-std-dir.cc \
  35         cow-std-ops.cc \
  36         cow-std-path.cc
  37 else
  38 cxx11_abi_sources =
  39 endif
  40
  41 sources = \
  42         dir.cc \
  43         ops.cc \
  44         path.cc \
  45         std-dir.cc \
  46         std-ops.cc \
  47         std-path.cc \
  48         ${cxx11_abi_sources}
  49
  50 # vpath % $(top_srcdir)/src/filesystem
  51
  52 libstdc__fs_la_SOURCES = $(sources)
  53
  54 # AM_CXXFLAGS needs to be in each subdirectory so that it can be
  55 # modified in a per-library or per-sub-library way.  Need to manually
  56 # set this option because CONFIG_CXXFLAGS has to be after
  57 # OPTIMIZE_CXXFLAGS on the compile line so that -O2 can be overridden
  58 # as the occasion call for it.
  59 AM_CXXFLAGS = \
  60         $(glibcxx_lt_pic_flag) $(glibcxx_compiler_shared_flag) \
  61         -std=gnu++17 \
  62         $(WARN_CXXFLAGS) $(OPTIMIZE_CXXFLAGS)  $(CONFIG_CXXFLAGS)
  63
  64 AM_MAKEFLAGS = \
  65         "gxx_include_dir=$(gxx_include_dir)"
  66
  67
  68 # Libtool notes
  69
  70 # 1) In general, libtool expects an argument such as `--tag=CXX' when
  71 # using the C++ compiler, because that will enable the settings
  72 # detected when C++ support was being configured.  However, when no
  73 # such flag is given in the command line, libtool attempts to figure
  74 # it out by matching the compiler name in each configuration section
  75 # against a prefix of the command line.  The problem is that, if the
  76 # compiler name and its initial flags stored in the libtool
  77 # configuration file don't match those in the command line, libtool
  78 # can't decide which configuration to use, and it gives up.  The
  79 # correct solution is to add `--tag CXX' to LTCXXCOMPILE and maybe
  80 # CXXLINK, just after $(LIBTOOL), so that libtool doesn't have to
  81 # attempt to infer which configuration to use.
  82 #
  83 # The second tag argument, `--tag disable-shared` means that libtool
  84 # only compiles each source once, for static objects. In actuality,
  85 # glibcxx_lt_pic_flag and glibcxx_compiler_shared_flag are added to
  86 # the libtool command that is used create the object, which is
  87 # suitable for shared libraries.  The `--tag disable-shared` must be
  88 # placed after --tag CXX lest things CXX undo the affect of
  89 # disable-shared.
  90
  91 # 2) Need to explicitly set LTCXXCOMPILE so that EXTRA_CXX_FLAGS is
  92 # last. (That way, things like -O2 passed down from the toplevel can
  93 # be overridden by --enable-debug.)
  94 LTCXXCOMPILE = \
  95         $(LIBTOOL) --tag CXX --tag disable-shared \
  96         $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) \
  97         --mode=compile $(CXX) $(TOPLEVEL_INCLUDES) \
  98         $(AM_CPPFLAGS) $(CPPFLAGS) $(AM_CXXFLAGS) $(CXXFLAGS) $(EXTRA_CXX_FLAGS)
  99
 100 LTLDFLAGS = $(shell $(SHELL) $(top_srcdir)/../libtool-ldflags $(LDFLAGS))
 101
 102 # 3) We'd have a problem when building the shared libstdc++ object if
 103 # the rules automake generates would be used.  We cannot allow g++ to
 104 # be used since this would add -lstdc++ to the link line which of
 105 # course is problematic at this point.  So, we get the top-level
 106 # directory to configure libstdc++-v3 to use gcc as the C++
 107 # compilation driver.
 108 CXXLINK = \
 109         $(LIBTOOL) --tag CXX --tag disable-shared \
 110         $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) \
 111         --mode=link $(CXX) \
 112         $(OPT_LDFLAGS) $(SECTION_LDFLAGS) $(AM_CXXFLAGS) $(LTLDFLAGS) -o $@
 113
 114 # By adding these files here, automake will remove them for 'make clean'
 115 CLEANFILES = stamp-*
 116