--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libatomic/configure.ac	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,267 @@
+# Process this file with autoreconf to produce a configure script.
+#  Copyright (C) 2012-2017 Free Software Foundation, Inc.
+#
+#  This file is part of the GNU Atomic Library (libatomic).
+#
+#  Libatomic 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 of the License, or
+#  (at your option) any later version.
+#
+#  Libatomic 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.
+#
+#  Under Section 7 of GPL version 3, you are granted additional
+#  permissions described in the GCC Runtime Library Exception, version
+#  3.1, as published by the Free Software Foundation.
+#
+#  You should have received a copy of the GNU General Public License and
+#  a copy of the GCC Runtime Library Exception along with this program;
+#  see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+#  <http://www.gnu.org/licenses/>.
+
+AC_PREREQ(2.59)
+AC_INIT([GNU Atomic Library], 1.0,,[libatomic])
+AC_CONFIG_HEADER(auto-config.h)
+
+# -------
+# Options
+# -------
+
+AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
+LIBAT_ENABLE(version-specific-runtime-libs, no, ,
+   [Specify that runtime libraries should be installed in a compiler-specific directory],
+   permit yes|no)
+AC_MSG_RESULT($enable_version_specific_runtime_libs)
+
+# We would like our source tree to be readonly. However when releases or
+# pre-releases are generated, the flex/bison generated files as well as the
+# various formats of manuals need to be included along with the rest of the
+# sources.  Therefore we have --enable-generated-files-in-srcdir to do
+# just that.
+AC_MSG_CHECKING([for --enable-generated-files-in-srcdir])
+LIBAT_ENABLE(generated-files-in-srcdir, no, ,
+   [put copies of generated files in source dir intended for creating source
+    tarballs for users without texinfo bison or flex.],
+   permit yes|no)
+AC_MSG_RESULT($enable_generated_files_in_srcdir)
+AM_CONDITIONAL(GENINSRC, test "$enable_generated_files_in_srcdir" = yes)
+
+
+# -------
+
+# Gets build, host, target, *_vendor, *_cpu, *_os, etc.
+#
+# You will slowly go insane if you do not grok the following fact:  when
+# building this library, the top-level /target/ becomes the library's /host/.
+#
+# configure then causes --target to default to --host, exactly like any
+# other package using autoconf.  Therefore, 'target' and 'host' will
+# always be the same.  This makes sense both for native and cross compilers
+# just think about it for a little while.  :-)
+#
+# Also, if this library is being configured as part of a cross compiler, the
+# top-level configure script will pass the "real" host as $with_cross_host.
+#
+# Do not delete or change the following two lines.  For why, see
+# http://gcc.gnu.org/ml/libstdc++/2003-07/msg00451.html
+AC_CANONICAL_SYSTEM
+target_alias=${target_alias-$host_alias}
+
+# Sets up automake.  Must come after AC_CANONICAL_SYSTEM.  Each of the
+# following is magically included in AUTOMAKE_OPTIONS in each Makefile.am.
+#  1.9.0:  minimum required version
+#  no-define:  PACKAGE and VERSION will not be #define'd in config.h (a bunch
+#              of other PACKAGE_* variables will, however, and there's nothing
+#              we can do about that; they come from AC_INIT).
+#  no-dist:  we don't want 'dist' and related rules.
+#  foreign:  we don't follow the normal rules for GNU packages (no COPYING
+#            file in the top srcdir, etc, etc), so stop complaining.
+#  -Wall:  turns on all automake warnings...
+#  -Wno-portability:  ...except this one, since GNU make is required.
+#  -Wno-override: ... and this one, since we do want this in testsuite.
+AM_INIT_AUTOMAKE([1.9.0 foreign no-dist -Wall -Wno-portability -Wno-override])
+AM_ENABLE_MULTILIB(, ..)
+
+# Calculate toolexeclibdir
+# Also toolexecdir, though it's only used in toolexeclibdir
+case ${enable_version_specific_runtime_libs} in
+  yes)
+    # Need the gcc compiler version to know where to install libraries
+    # and header files if --enable-version-specific-runtime-libs option
+    # is selected.
+    toolexecdir='$(libdir)/gcc/$(target_alias)'
+    toolexeclibdir='$(toolexecdir)/$(gcc_version)$(MULTISUBDIR)'
+    ;;
+  no)
+    if test -n "$with_cross_host" &&
+       test x"$with_cross_host" != x"no"; then
+      # Install a library built with a cross compiler in tooldir, not libdir.
+      toolexecdir='$(exec_prefix)/$(target_alias)'
+      toolexeclibdir='$(toolexecdir)/lib'
+    else
+      toolexecdir='$(libdir)/gcc-lib/$(target_alias)'
+      toolexeclibdir='$(libdir)'
+    fi
+    multi_os_directory=`$CC -print-multi-os-directory`
+    case $multi_os_directory in
+      .) ;; # Avoid trailing /.
+      *) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;;
+    esac
+    ;;
+esac
+AC_SUBST(toolexecdir)
+AC_SUBST(toolexeclibdir)
+
+# Check the compiler.
+# The same as in boehm-gc and libstdc++. Have to borrow it from there.
+# We must force CC to /not/ be precious variables; otherwise
+# the wrong, non-multilib-adjusted value will be used in multilibs.
+# As a side effect, we have to subst CFLAGS ourselves.
+
+m4_rename([_AC_ARG_VAR_PRECIOUS],[real_PRECIOUS])
+m4_define([_AC_ARG_VAR_PRECIOUS],[])
+AC_PROG_CC
+AM_PROG_AS
+m4_rename_force([real_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
+
+AC_SUBST(CFLAGS)
+
+# In order to override CFLAGS_FOR_TARGET, all of our special flags go
+# in XCFLAGS.  But we need them in CFLAGS during configury.  So put them
+# in both places for now and restore CFLAGS at the end of config.
+save_CFLAGS="$CFLAGS"
+
+# Find other programs we need.
+AC_CHECK_TOOL(AR, ar)
+AC_CHECK_TOOL(NM, nm)
+AC_CHECK_TOOL(RANLIB, ranlib, ranlib-not-found-in-path-error)
+AC_PATH_PROG(PERL, perl, perl-not-found-in-path-error)
+AC_PROG_INSTALL
+
+# Configure libtool
+AM_PROG_LIBTOOL
+ACX_LT_HOST_FLAGS
+AC_SUBST(enable_shared)
+AC_SUBST(enable_static)
+AM_MAINTAINER_MODE
+
+# For libtool versioning info, format is CURRENT:REVISION:AGE
+libtool_VERSION=3:0:2
+AC_SUBST(libtool_VERSION)
+
+# Check for used threading-model
+AC_MSG_CHECKING([for thread model used by GCC])
+target_thread_file=`$CC -v 2>&1 | sed -n 's/^Thread model: //p'`
+AC_MSG_RESULT([$target_thread_file])
+
+# Get target configury.
+. ${srcdir}/configure.tgt
+if test -n "$UNSUPPORTED"; then
+  AC_MSG_ERROR([Configuration ${target} is unsupported.])
+fi
+
+# Disable fallbacks to __sync routines from libgcc.  Otherwise we'll
+# make silly decisions about what the cpu can do.
+CFLAGS="$save_CFLAGS -fno-sync-libcalls $XCFLAGS"
+
+# Check header files.
+AC_STDC_HEADERS
+ACX_HEADER_STRING
+GCC_HEADER_STDINT(gstdint.h)
+AC_CHECK_HEADERS([fenv.h])
+
+# Check for common type sizes
+LIBAT_FORALL_MODES([LIBAT_HAVE_INT_MODE])
+
+# Check for compiler builtins of atomic operations.
+LIBAT_TEST_ATOMIC_INIT
+LIBAT_FORALL_MODES([LIBAT_HAVE_ATOMIC_LOADSTORE])
+LIBAT_FORALL_MODES([LIBAT_HAVE_ATOMIC_TAS])
+LIBAT_FORALL_MODES([LIBAT_HAVE_ATOMIC_EXCHANGE])
+LIBAT_FORALL_MODES([LIBAT_HAVE_ATOMIC_CAS])
+LIBAT_FORALL_MODES([LIBAT_HAVE_ATOMIC_FETCH_ADD])
+LIBAT_FORALL_MODES([LIBAT_HAVE_ATOMIC_FETCH_OP])
+
+AC_C_BIGENDIAN
+# I don't like the default behaviour of WORDS_BIGENDIAN undefined for LE.
+AH_BOTTOM(
+[#ifndef WORDS_BIGENDIAN
+#define WORDS_BIGENDIAN 0
+#endif])
+
+LIBAT_WORDSIZE
+
+# Check to see if -pthread or -lpthread is needed.  Prefer the former.
+# In case the pthread.h system header is not found, this test will fail.
+case " $config_path " in
+ *" posix "*)
+  XPCFLAGS=""
+  CFLAGS="$CFLAGS -pthread"
+  AC_LINK_IFELSE(
+    [AC_LANG_PROGRAM(
+     [#include <pthread.h>
+      void *g(void *d) { return NULL; }],
+     [pthread_t t; pthread_create(&t,NULL,g,NULL);])],
+    [XPCFLAGS=" -pthread"],
+    [CFLAGS="$save_CFLAGS $XCFLAGS" LIBS="-lpthread $LIBS"
+     AC_LINK_IFELSE(
+      [AC_LANG_PROGRAM(
+       [#include <pthread.h>
+        void *g(void *d) { return NULL; }],
+       [pthread_t t; pthread_create(&t,NULL,g,NULL);])],
+      [],
+      [AC_MSG_ERROR([Pthreads are required to build libatomic])])])
+  CFLAGS="$save_CFLAGS $XPCFLAGS"
+  ;;
+esac
+
+# See what sort of export controls are available.
+LIBAT_CHECK_ATTRIBUTE_VISIBILITY
+LIBAT_CHECK_ATTRIBUTE_DLLEXPORT
+LIBAT_CHECK_ATTRIBUTE_ALIAS
+if test x$try_ifunc = xyes; then
+  LIBAT_CHECK_IFUNC
+fi
+
+# Check linker support.
+LIBAT_ENABLE_SYMVERS
+
+# Cleanup and exit.
+CFLAGS="$save_CFLAGS"
+AC_CACHE_SAVE
+
+# Add -Wall -Werror if we are using GCC.
+if test "x$GCC" = "xyes"; then
+  XCFLAGS="$XCFLAGS -Wall -Werror"
+fi
+
+XCFLAGS="$XCFLAGS $XPCFLAGS"
+
+AC_SUBST(config_path)
+AC_SUBST(XCFLAGS)
+AC_SUBST(XLDFLAGS)
+AC_SUBST(LIBS)
+AC_SUBST(SIZES)
+
+AM_CONDITIONAL(HAVE_IFUNC, test x$libat_cv_have_ifunc = xyes)
+AM_CONDITIONAL(ARCH_ARM_LINUX,
+	       [expr "$config_path" : ".* linux/arm .*" > /dev/null])
+AM_CONDITIONAL(ARCH_I386,
+	       [test "$ARCH" = x86 && test x$libat_cv_wordsize = x4])
+AM_CONDITIONAL(ARCH_X86_64,
+	       [test "$ARCH" = x86 && test x$libat_cv_wordsize = x8])
+
+# Determine what GCC version number to use in filesystem paths.
+GCC_BASE_VER
+
+if test ${multilib} = yes; then
+  multilib_arg="--enable-multilib"
+else
+  multilib_arg=
+fi
+
+AC_CONFIG_FILES(Makefile testsuite/Makefile)
+AC_OUTPUT