1 ## Makefile for the GNU C++ Filesystem library.
3 ## Copyright (C) 2014-2017 Free Software Foundation, Inc.
5 ## Process this file with automake to produce Makefile.in.
7 ## This file is part of GCC.
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)
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.
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/>.
23 include $(top_srcdir)/fragment.am
25 toolexeclib_LTLIBRARIES = libstdc++fs.la
50 # vpath % $(top_srcdir)/src/filesystem
52 libstdc__fs_la_SOURCES = $(sources)
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.
60 $(glibcxx_lt_pic_flag) $(glibcxx_compiler_shared_flag) \
62 $(WARN_CXXFLAGS) $(OPTIMIZE_CXXFLAGS) $(CONFIG_CXXFLAGS)
65 "gxx_include_dir=$(gxx_include_dir)"
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.
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
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.)
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)
100 LTLDFLAGS = $(shell $(SHELL) $(top_srcdir)/../libtool-ldflags $(LDFLAGS))
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.
109 $(LIBTOOL) --tag CXX --tag disable-shared \
110 $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) \
112 $(OPT_LDFLAGS) $(SECTION_LDFLAGS) $(AM_CXXFLAGS) $(LTLDFLAGS) -o $@
114 # By adding these files here, automake will remove them for 'make clean'