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
23include $(top_srcdir)/fragment.am
24
25toolexeclib_LTLIBRARIES = libstdc++fs.la
26
27headers =
28
29if ENABLE_DUAL_ABI
30cxx11_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
37else
38cxx11_abi_sources =
39endif
40
41sources = \
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
52libstdc__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.
59AM_CXXFLAGS = \
60	$(glibcxx_lt_pic_flag) $(glibcxx_compiler_shared_flag) \
61	-std=gnu++17 \
62	$(WARN_CXXFLAGS) $(OPTIMIZE_CXXFLAGS)  $(CONFIG_CXXFLAGS)
63
64AM_MAKEFLAGS = \
65	"gxx_include_dir=$(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.)
94LTCXXCOMPILE = \
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
100LTLDFLAGS = $(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.
108CXXLINK = \
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'
115CLEANFILES = stamp-*
116
117