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source: m4/boost.m4@ b09709

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Last change on this file since b09709 was 6309fd, checked in by Frederik Heber <heber@…>, 11 years ago

Fixes for Ubuntu 14.04.

subdir-objects required for automake.
in Makefile.am's INCLUDES is deprecated (for AM_CPPFLAGS).
updated boost.m4 (serial 22) required due to boost thread depending on boost system library. (Re-)Added checks for EXCEPTION and ITERATOR.

Property mode set to 100644

File size: 48.1 KB

Rev	Line
[a0ddcf]	1	# boost.m4: Locate Boost headers and libraries for autoconf-based projects.
[6309fd]	2	# Copyright (C) 2007-2011, 2014 Benoit Sigoure <tsuna@lrde.epita.fr>
[a0ddcf]	3	#
	4	# This program is free software: you can redistribute it and/or modify
	5	# it under the terms of the GNU General Public License as published by
	6	# the Free Software Foundation, either version 3 of the License, or
	7	# (at your option) any later version.
	8	#
	9	# Additional permission under section 7 of the GNU General Public
	10	# License, version 3 ("GPLv3"):
	11	#
	12	# If you convey this file as part of a work that contains a
	13	# configuration script generated by Autoconf, you may do so under
	14	# terms of your choice.
	15	#
	16	# This program is distributed in the hope that it will be useful,
	17	# but WITHOUT ANY WARRANTY; without even the implied warranty of
	18	# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	19	# GNU General Public License for more details.
	20	#
	21	# You should have received a copy of the GNU General Public License
	22	# along with this program. If not, see <http://www.gnu.org/licenses/>.
	23
	24	m4_define([_BOOST_SERIAL], [m4_translit([
[6309fd]	25	# serial 22
[a0ddcf]	26	], [#
	27	], [])])
	28
	29	# Original sources can be found at http://github.com/tsuna/boost.m4
	30	# You can fetch the latest version of the script by doing:
	31	# wget http://github.com/tsuna/boost.m4/raw/master/build-aux/boost.m4
	32
	33	# ------ #
	34	# README #
	35	# ------ #
	36
	37	# This file provides several macros to use the various Boost libraries.
	38	# The first macro is BOOST_REQUIRE. It will simply check if it's possible to
	39	# find the Boost headers of a given (optional) minimum version and it will
	40	# define BOOST_CPPFLAGS accordingly. It will add an option --with-boost to
	41	# your configure so that users can specify non standard locations.
	42	# If the user's environment contains BOOST_ROOT and --with-boost was not
	43	# specified, --with-boost=$BOOST_ROOT is implicitly used.
	44	# For more README and documentation, go to http://github.com/tsuna/boost.m4
	45	# Note: THESE MACROS ASSUME THAT YOU USE LIBTOOL. If you don't, don't worry,
	46	# simply read the README, it will show you what to do step by step.
	47
	48	m4_pattern_forbid([^_?(BOOST\|Boost)_])
	49
	50
	51	# _BOOST_SED_CPP(SED-PROGRAM, PROGRAM,
	52	# [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
	53	# --------------------------------------------------------
	54	# Same as AC_EGREP_CPP, but leave the result in conftest.i.
	55	#
	56	# SED-PROGRAM is not overquoted, as in AC_EGREP_CPP. It is expanded
	57	# in double-quotes, so escape your double quotes.
	58	#
	59	# It could be useful to turn this into a macro which extracts the
	60	# value of any macro.
	61	m4_define([_BOOST_SED_CPP],
[6309fd]	62	[AC_LANG_PUSH([C++])dnl
	63	AC_LANG_PREPROC_REQUIRE()dnl
[a0ddcf]	64	AC_REQUIRE([AC_PROG_SED])dnl
	65	AC_LANG_CONFTEST([AC_LANG_SOURCE([[$2]])])
	66	AS_IF([dnl eval is necessary to expand ac_cpp.
	67	dnl Ultrix and Pyramid sh refuse to redirect output of eval, so use subshell.
	68	dnl Beware of Windows end-of-lines, for instance if we are running
	69	dnl some Windows programs under Wine. In that case, boost/version.hpp
	70	dnl is certainly using "\r\n", but the regular Unix shell will only
	71	dnl strip `\n' with backquotes, not the `\r'. This results in
	72	dnl boost_cv_lib_version='1_37\r' for instance, which breaks
	73	dnl everything else.
	74	dnl Cannot use 'dnl' after [$4] because a trailing dnl may break AC_CACHE_CHECK
	75	(eval "$ac_cpp conftest.$ac_ext") 2>&AS_MESSAGE_LOG_FD \|
	76	tr -d '\r' \|
	77	$SED -n -e "$1" >conftest.i 2>&1],
	78	[$3],
	79	[$4])
	80	rm -rf conftest*
[6309fd]	81	AC_LANG_POP([C++])dnl
	82	])# _BOOST_SED_CPP
[a0ddcf]	83
	84
	85
	86	# BOOST_REQUIRE([VERSION], [ACTION-IF-NOT-FOUND])
	87	# -----------------------------------------------
	88	# Look for Boost. If version is given, it must either be a literal of the form
	89	# "X.Y.Z" where X, Y and Z are integers (the ".Z" part being optional) or a
	90	# variable "$var".
	91	# Defines the value BOOST_CPPFLAGS. This macro only checks for headers with
	92	# the required version, it does not check for any of the Boost libraries.
	93	# On # success, defines HAVE_BOOST. On failure, calls the optional
	94	# ACTION-IF-NOT-FOUND action if one was supplied.
	95	# Otherwise aborts with an error message.
	96	AC_DEFUN([BOOST_REQUIRE],
	97	[AC_REQUIRE([AC_PROG_CXX])dnl
	98	AC_REQUIRE([AC_PROG_GREP])dnl
	99	echo "$as_me: this is boost.m4[]_BOOST_SERIAL" >&AS_MESSAGE_LOG_FD
	100	boost_save_IFS=$IFS
	101	boost_version_req=$1
	102	IFS=.
	103	set x $boost_version_req 0 0 0
	104	IFS=$boost_save_IFS
	105	shift
	106	boost_version_req=`expr "$[1]" '' 100000 + "$[2]" '' 100 + "$[3]"`
	107	boost_version_req_string=$[1].$[2].$[3]
	108	AC_ARG_WITH([boost],
	109	[AS_HELP_STRING([--with-boost=DIR],
	110	[prefix of Boost $1 @<:@guess@:>@])])dnl
	111	AC_ARG_VAR([BOOST_ROOT],[Location of Boost installation])dnl
	112	# If BOOST_ROOT is set and the user has not provided a value to
	113	# --with-boost, then treat BOOST_ROOT as if it the user supplied it.
	114	if test x"$BOOST_ROOT" != x; then
	115	if test x"$with_boost" = x; then
	116	AC_MSG_NOTICE([Detected BOOST_ROOT; continuing with --with-boost=$BOOST_ROOT])
	117	with_boost=$BOOST_ROOT
	118	else
	119	AC_MSG_NOTICE([Detected BOOST_ROOT=$BOOST_ROOT, but overridden by --with-boost=$with_boost])
	120	fi
	121	fi
	122	AC_SUBST([DISTCHECK_CONFIGURE_FLAGS],
	123	["$DISTCHECK_CONFIGURE_FLAGS '--with-boost=$with_boost'"])dnl
	124	boost_save_CPPFLAGS=$CPPFLAGS
	125	AC_CACHE_CHECK([for Boost headers version >= $boost_version_req_string],
	126	[boost_cv_inc_path],
	127	[boost_cv_inc_path=no
	128	AC_LANG_PUSH([C++])dnl
	129	m4_pattern_allow([^BOOST_VERSION$])dnl
	130	AC_LANG_CONFTEST([AC_LANG_PROGRAM([[#include <boost/version.hpp>
	131	#if !defined BOOST_VERSION
	132	# error BOOST_VERSION is not defined
	133	#elif BOOST_VERSION < $boost_version_req
	134	# error Boost headers version < $boost_version_req
	135	#endif
	136	]])])
	137	# If the user provided a value to --with-boost, use it and only it.
	138	case $with_boost in #(
	139	''\|yes) set x '' /opt/local/include /usr/local/include /opt/include \
	140	/usr/include C:/Boost/include;; #(
	141	*) set x "$with_boost/include" "$with_boost";;
	142	esac
	143	shift
	144	for boost_dir
	145	do
	146	# Without --layout=system, Boost (or at least some versions) installs
	147	# itself in <prefix>/include/boost-<version>. This inner loop helps to
	148	# find headers in such directories.
	149	#
	150	# Any ${boost_dir}/boost-x_xx directories are searched in reverse version
	151	# order followed by ${boost_dir}. The final '.' is a sentinel for
	152	# searching $boost_dir" itself. Entries are whitespace separated.
	153	#
	154	# I didn't indent this loop on purpose (to avoid over-indented code)
	155	boost_layout_system_search_list=`cd "$boost_dir" 2>/dev/null \
	156	&& ls -1 \| "${GREP}" '^boost-' \| sort -rn -t- -k2 \
	157	&& echo .`
	158	for boost_inc in $boost_layout_system_search_list
	159	do
	160	if test x"$boost_inc" != x.; then
	161	boost_inc="$boost_dir/$boost_inc"
	162	else
	163	boost_inc="$boost_dir" # Uses sentinel in boost_layout_system_search_list
	164	fi
	165	if test x"$boost_inc" != x; then
	166	# We are going to check whether the version of Boost installed
	167	# in $boost_inc is usable by running a compilation that
	168	# #includes it. But if we pass a -I/some/path in which Boost
	169	# is not installed, the compiler will just skip this -I and
	170	# use other locations (either from CPPFLAGS, or from its list
	171	# of system include directories). As a result we would use
	172	# header installed on the machine instead of the /some/path
	173	# specified by the user. So in that precise case (trying
	174	# $boost_inc), make sure the version.hpp exists.
	175	#
	176	# Use test -e as there can be symlinks.
	177	test -e "$boost_inc/boost/version.hpp" \|\| continue
	178	CPPFLAGS="$CPPFLAGS -I$boost_inc"
	179	fi
	180	AC_COMPILE_IFELSE([], [boost_cv_inc_path=yes], [boost_cv_version=no])
	181	if test x"$boost_cv_inc_path" = xyes; then
	182	if test x"$boost_inc" != x; then
	183	boost_cv_inc_path=$boost_inc
	184	fi
	185	break 2
	186	fi
	187	done
	188	done
	189	AC_LANG_POP([C++])dnl
	190	])
	191	case $boost_cv_inc_path in #(
	192	no)
	193	boost_errmsg="cannot find Boost headers version >= $boost_version_req_string"
	194	m4_if([$2], [], [AC_MSG_ERROR([$boost_errmsg])],
	195	[AC_MSG_NOTICE([$boost_errmsg])])
	196	$2
	197	;;#(
	198	yes)
	199	BOOST_CPPFLAGS=
	200	;;#(
	201	*)
	202	AC_SUBST([BOOST_CPPFLAGS], ["-I$boost_cv_inc_path"])dnl
	203	;;
	204	esac
	205	if test x"$boost_cv_inc_path" != xno; then
	206	AC_DEFINE([HAVE_BOOST], [1],
	207	[Defined if the requested minimum BOOST version is satisfied])
	208	AC_CACHE_CHECK([for Boost's header version],
	209	[boost_cv_lib_version],
	210	[m4_pattern_allow([^BOOST_LIB_VERSION$])dnl
	211	_BOOST_SED_CPP([/^boost-lib-version = /{s///;s/\"//g;p;q;}],
	212	[#include <boost/version.hpp>
	213	boost-lib-version = BOOST_LIB_VERSION],
	214	[boost_cv_lib_version=`cat conftest.i`])])
	215	# e.g. "134" for 1_34_1 or "135" for 1_35
	216	boost_major_version=`echo "$boost_cv_lib_version" \| sed 's/_//;s/_.*//'`
	217	case $boost_major_version in #(
	218	'' \| [[!0-9]])
	219	AC_MSG_ERROR([invalid value: boost_major_version=$boost_major_version])
	220	;;
	221	esac
	222	fi
	223	CPPFLAGS=$boost_save_CPPFLAGS
	224	])# BOOST_REQUIRE
	225
[6309fd]	226
[a0ddcf]	227	# BOOST_STATIC()
	228	# --------------
	229	# Add the "--enable-static-boost" configure argument. If this argument is given
	230	# on the command line, static versions of the libraries will be looked up.
	231	AC_DEFUN([BOOST_STATIC],
	232	[AC_ARG_ENABLE([static-boost],
[6309fd]	233	[AS_HELP_STRING([--enable-static-boost],
[a0ddcf]	234	[Prefer the static boost libraries over the shared ones [no]])],
	235	[enable_static_boost=yes],
	236	[enable_static_boost=no])])# BOOST_STATIC
	237
[6309fd]	238
[a0ddcf]	239	# BOOST_FIND_HEADER([HEADER-NAME], [ACTION-IF-NOT-FOUND], [ACTION-IF-FOUND])
	240	# --------------------------------------------------------------------------
	241	# Wrapper around AC_CHECK_HEADER for Boost headers. Useful to check for
	242	# some parts of the Boost library which are only made of headers and don't
	243	# require linking (such as Boost.Foreach).
	244	#
	245	# Default ACTION-IF-NOT-FOUND: Fail with a fatal error unless Boost couldn't be
	246	# found in the first place, in which case by default a notice is issued to the
	247	# user. Presumably if we haven't died already it's because it's OK to not have
	248	# Boost, which is why only a notice is issued instead of a hard error.
	249	#
	250	# Default ACTION-IF-FOUND: define the preprocessor symbol HAVE_<HEADER-NAME> in
	251	# case of success # (where HEADER-NAME is written LIKE_THIS, e.g.,
	252	# HAVE_BOOST_FOREACH_HPP).
	253	AC_DEFUN([BOOST_FIND_HEADER],
	254	[AC_REQUIRE([BOOST_REQUIRE])dnl
	255	if test x"$boost_cv_inc_path" = xno; then
	256	m4_default([$2], [AC_MSG_NOTICE([Boost not available, not searching for $1])])
	257	else
	258	AC_LANG_PUSH([C++])dnl
	259	boost_save_CPPFLAGS=$CPPFLAGS
	260	CPPFLAGS="$CPPFLAGS $BOOST_CPPFLAGS"
	261	AC_CHECK_HEADER([$1],
	262	[m4_default([$3], [AC_DEFINE(AS_TR_CPP([HAVE_$1]), [1],
	263	[Define to 1 if you have <$1>])])],
	264	[m4_default([$2], [AC_MSG_ERROR([cannot find $1])])])
	265	CPPFLAGS=$boost_save_CPPFLAGS
	266	AC_LANG_POP([C++])dnl
	267	fi
	268	])# BOOST_FIND_HEADER
	269
	270
[6309fd]	271	# BOOST_FIND_LIBS([COMPONENT-NAME], [CANDIDATE-LIB-NAMES],
	272	# [PREFERRED-RT-OPT], [HEADER-NAME], [CXX-TEST],
	273	# [CXX-PROLOGUE])
	274	# --------------------------------------------------------------
	275	# Look for the Boost library COMPONENT-NAME (e.g., `thread', for
	276	# libboost_thread) under the possible CANDIDATE-LIB-NAMES (e.g.,
	277	# "thread_win32 thread"). Check that HEADER-NAME works and check that
	278	# libboost_LIB-NAME can link with the code CXX-TEST. The optional
	279	# argument CXX-PROLOGUE can be used to include some C++ code before
	280	# the `main' function.
[a0ddcf]	281	#
	282	# Invokes BOOST_FIND_HEADER([HEADER-NAME]) (see above).
	283	#
	284	# Boost libraries typically come compiled with several flavors (with different
	285	# runtime options) so PREFERRED-RT-OPT is the preferred suffix. A suffix is one
	286	# or more of the following letters: sgdpn (in that order). s = static
	287	# runtime, d = debug build, g = debug/diagnostic runtime, p = STLPort build,
	288	# n = (unsure) STLPort build without iostreams from STLPort (it looks like `n'
	289	# must always be used along with `p'). Additionally, PREFERRED-RT-OPT can
	290	# start with `mt-' to indicate that there is a preference for multi-thread
	291	# builds. Some sample values for PREFERRED-RT-OPT: (nothing), mt, d, mt-d, gdp
	292	# ... If you want to make sure you have a specific version of Boost
	293	# (eg, >= 1.33) you must invoke BOOST_REQUIRE before this macro.
[6309fd]	294	AC_DEFUN([BOOST_FIND_LIBS],
[a0ddcf]	295	[AC_REQUIRE([BOOST_REQUIRE])dnl
	296	AC_REQUIRE([_BOOST_FIND_COMPILER_TAG])dnl
	297	AC_REQUIRE([BOOST_STATIC])dnl
	298	AC_REQUIRE([_BOOST_GUESS_WHETHER_TO_USE_MT])dnl
	299	if test x"$boost_cv_inc_path" = xno; then
	300	AC_MSG_NOTICE([Boost not available, not searching for the Boost $1 library])
	301	else
	302	dnl The else branch is huge and wasn't intended on purpose.
	303	AC_LANG_PUSH([C++])dnl
	304	AS_VAR_PUSHDEF([Boost_lib], [boost_cv_lib_$1])dnl
	305	AS_VAR_PUSHDEF([Boost_lib_LDFLAGS], [boost_cv_lib_$1_LDFLAGS])dnl
	306	AS_VAR_PUSHDEF([Boost_lib_LDPATH], [boost_cv_lib_$1_LDPATH])dnl
	307	AS_VAR_PUSHDEF([Boost_lib_LIBS], [boost_cv_lib_$1_LIBS])dnl
[6309fd]	308	BOOST_FIND_HEADER([$4])
[a0ddcf]	309	boost_save_CPPFLAGS=$CPPFLAGS
	310	CPPFLAGS="$CPPFLAGS $BOOST_CPPFLAGS"
	311	AC_CACHE_CHECK([for the Boost $1 library], [Boost_lib],
[6309fd]	312	[_BOOST_FIND_LIBS($@)])
	313	case $Boost_lib in #(
	314	(no) _AC_MSG_LOG_CONFTEST
	315	AC_MSG_ERROR([cannot find the flags to link with Boost $1])
	316	;;
	317	esac
	318	AC_SUBST(AS_TR_CPP([BOOST_$1_LDFLAGS]), [$Boost_lib_LDFLAGS])dnl
	319	AC_SUBST(AS_TR_CPP([BOOST_$1_LDPATH]), [$Boost_lib_LDPATH])dnl
	320	AC_SUBST([BOOST_LDPATH], [$Boost_lib_LDPATH])dnl
	321	AC_SUBST(AS_TR_CPP([BOOST_$1_LIBS]), [$Boost_lib_LIBS])dnl
	322	CPPFLAGS=$boost_save_CPPFLAGS
	323	AS_VAR_POPDEF([Boost_lib])dnl
	324	AS_VAR_POPDEF([Boost_lib_LDFLAGS])dnl
	325	AS_VAR_POPDEF([Boost_lib_LDPATH])dnl
	326	AS_VAR_POPDEF([Boost_lib_LIBS])dnl
	327	AC_LANG_POP([C++])dnl
	328	fi
	329	])
	330
	331
	332	# BOOST_FIND_LIB([LIB-NAME],
	333	# [PREFERRED-RT-OPT], [HEADER-NAME], [CXX-TEST],
	334	# [CXX-PROLOGUE])
	335	# --------------------------------------------------------------
	336	# Backward compatibility wrapper for BOOST_FIND_LIBS.
	337	AC_DEFUN([BOOST_FIND_LIB],
	338	[BOOST_FIND_LIBS([$1], $@)])
	339
	340
	341	# _BOOST_FIND_LIBS([LIB-NAME], [CANDIDATE-LIB-NAMES],
	342	# [PREFERRED-RT-OPT], [HEADER-NAME], [CXX-TEST],
	343	# [CXX-PROLOGUE])
	344	# --------------------------------------------------------------
	345	# Real implementation of BOOST_FIND_LIBS: rely on these local macros:
	346	# Boost_lib, Boost_lib_LDFLAGS, Boost_lib_LDPATH, Boost_lib_LIBS
	347	#
	348	# The algorithm is as follows: first look for a given library name
	349	# according to the user's PREFERRED-RT-OPT. For each library name, we
	350	# prefer to use the ones that carry the tag (toolset name). Each
	351	# library is searched through the various standard paths were Boost is
	352	# usually installed. If we can't find the standard variants, we try
	353	# to enforce -mt (for instance on MacOSX, libboost_thread.dylib
	354	# doesn't exist but there's -obviously- libboost_thread-mt.dylib).
	355	AC_DEFUN([_BOOST_FIND_LIBS],
	356	[Boost_lib=no
	357	case "$3" in #(
	358	(mt \| mt-) boost_mt=-mt; boost_rtopt=;; #(
	359	(mt* \| mt-) boost_mt=-mt; boost_rtopt=`expr "X$3" : 'Xmt-\(.*\)'`;; #(
	360	(*) boost_mt=; boost_rtopt=$3;;
[a0ddcf]	361	esac
	362	if test $enable_static_boost = yes; then
	363	boost_rtopt="s$boost_rtopt"
	364	fi
	365	# Find the proper debug variant depending on what we've been asked to find.
	366	case $boost_rtopt in #(
[6309fd]	367	(d) boost_rt_d=$boost_rtopt;; #(
	368	([[sgpn]]) # Insert the `d' at the right place (in between `sg' and `pn')
[a0ddcf]	369	boost_rt_d=`echo "$boost_rtopt" \| sed 's/\(sg\)\(pn\)/\1\2/'`;; #(
[6309fd]	370	(*) boost_rt_d='-d';;
[a0ddcf]	371	esac
	372	# If the PREFERRED-RT-OPT are not empty, prepend a `-'.
	373	test -n "$boost_rtopt" && boost_rtopt="-$boost_rtopt"
	374	$boost_guess_use_mt && boost_mt=-mt
	375	# Look for the abs path the static archive.
	376	# $libext is computed by Libtool but let's make sure it's non empty.
	377	test -z "$libext" &&
	378	AC_MSG_ERROR([the libext variable is empty, did you invoke Libtool?])
	379	boost_save_ac_objext=$ac_objext
	380	# Generate the test file.
[6309fd]	381	AC_LANG_CONFTEST([AC_LANG_PROGRAM([#include <$4>
	382	$6], [$5])])
[a0ddcf]	383	dnl Optimization hacks: compiling C++ is slow, especially with Boost. What
	384	dnl we're trying to do here is guess the right combination of link flags
	385	dnl (LIBS / LDFLAGS) to use a given library. This can take several
	386	dnl iterations before it succeeds and is thus very slow. So what we do
	387	dnl instead is that we compile the code first (and thus get an object file,
	388	dnl typically conftest.o). Then we try various combinations of link flags
	389	dnl until we succeed to link conftest.o in an executable. The problem is
	390	dnl that the various TRY_LINK / COMPILE_IFELSE macros of Autoconf always
	391	dnl remove all the temporary files including conftest.o. So the trick here
	392	dnl is to temporarily change the value of ac_objext so that conftest.o is
	393	dnl preserved accross tests. This is obviously fragile and I will burn in
	394	dnl hell for not respecting Autoconf's documented interfaces, but in the
	395	dnl mean time, it optimizes the macro by a factor of 5 to 30.
	396	dnl Another small optimization: the first argument of AC_COMPILE_IFELSE left
	397	dnl empty because the test file is generated only once above (before we
	398	dnl start the for loops).
	399	AC_COMPILE_IFELSE([],
	400	[ac_objext=do_not_rm_me_plz],
	401	[AC_MSG_ERROR([cannot compile a test that uses Boost $1])])
	402	ac_objext=$boost_save_ac_objext
	403	boost_failed_libs=
[6309fd]	404	# Don't bother to ident the following nested for loops, only the 2
	405	# innermost ones matter.
	406	for boost_lib_ in $2; do
[a0ddcf]	407	for boost_tag_ in -$boost_cv_lib_tag ''; do
	408	for boost_ver_ in -$boost_cv_lib_version ''; do
	409	for boost_mt_ in $boost_mt -mt ''; do
	410	for boost_rtopt_ in $boost_rtopt '' -d; do
	411	for boost_lib in \
[6309fd]	412	boost_$boost_lib_$boost_tag_$boost_mt_$boost_rtopt_$boost_ver_ \
	413	boost_$boost_lib_$boost_tag_$boost_rtopt_$boost_ver_ \
	414	boost_$boost_lib_$boost_tag_$boost_mt_$boost_ver_ \
	415	boost_$boost_lib_$boost_tag_$boost_ver_
[a0ddcf]	416	do
	417	# Avoid testing twice the same lib
	418	case $boost_failed_libs in #(
[6309fd]	419	(@$boost_lib@) continue;;
[a0ddcf]	420	esac
	421	# If with_boost is empty, we'll search in /lib first, which is not quite
	422	# right so instead we'll try to a location based on where the headers are.
	423	boost_tmp_lib=$with_boost
	424	test x"$with_boost" = x && boost_tmp_lib=${boost_cv_inc_path%/include}
	425	for boost_ldpath in "$boost_tmp_lib/lib" '' \
	426	/opt/local/lib* /usr/local/lib* /opt/lib* /usr/lib* \
	427	"$with_boost" C:/Boost/lib /lib*
	428	do
[6309fd]	429	# Don't waste time with directories that don't exist.
	430	if test x"$boost_ldpath" != x && test ! -e "$boost_ldpath"; then
	431	continue
	432	fi
[a0ddcf]	433	boost_save_LDFLAGS=$LDFLAGS
	434	# Are we looking for a static library?
	435	case $boost_ldpath:$boost_rtopt_ in #(
[6309fd]	436	(?:s) # Yes (Non empty boost_ldpath + s in rt opt)
[a0ddcf]	437	Boost_lib_LIBS="$boost_ldpath/lib$boost_lib.$libext"
	438	test -e "$Boost_lib_LIBS" \|\| continue;; #(
[6309fd]	439	(*) # No: use -lboost_foo to find the shared library.
[a0ddcf]	440	Boost_lib_LIBS="-l$boost_lib";;
	441	esac
	442	boost_save_LIBS=$LIBS
	443	LIBS="$Boost_lib_LIBS $LIBS"
	444	test x"$boost_ldpath" != x && LDFLAGS="$LDFLAGS -L$boost_ldpath"
	445	dnl First argument of AC_LINK_IFELSE left empty because the test file is
	446	dnl generated only once above (before we start the for loops).
	447	_BOOST_AC_LINK_IFELSE([],
	448	[Boost_lib=yes], [Boost_lib=no])
	449	ac_objext=$boost_save_ac_objext
	450	LDFLAGS=$boost_save_LDFLAGS
	451	LIBS=$boost_save_LIBS
	452	if test x"$Boost_lib" = xyes; then
[6309fd]	453	# Check or used cached result of whether or not using -R or
	454	# -rpath makes sense. Some implementations of ld, such as for
	455	# Mac OSX, require -rpath but -R is the flag known to work on
	456	# other systems. https://github.com/tsuna/boost.m4/issues/19
	457	AC_CACHE_VAL([boost_cv_rpath_link_ldflag],
	458	[case $boost_ldpath in
	459	'') # Nothing to do.
	460	boost_cv_rpath_link_ldflag=
	461	boost_rpath_link_ldflag_found=yes;;
	462	*)
	463	for boost_cv_rpath_link_ldflag in -Wl,-R, -Wl,-rpath,; do
	464	LDFLAGS="$boost_save_LDFLAGS -L$boost_ldpath $boost_cv_rpath_link_ldflag$boost_ldpath"
	465	LIBS="$boost_save_LIBS $Boost_lib_LIBS"
	466	_BOOST_AC_LINK_IFELSE([],
	467	[boost_rpath_link_ldflag_found=yes
	468	break],
	469	[boost_rpath_link_ldflag_found=no])
	470	done
	471	;;
	472	esac
	473	AS_IF([test "x$boost_rpath_link_ldflag_found" != "xyes"],
	474	[AC_MSG_ERROR([Unable to determine whether to use -R or -rpath])])
	475	LDFLAGS=$boost_save_LDFLAGS
	476	LIBS=$boost_save_LIBS
	477	])
	478	test x"$boost_ldpath" != x &&
	479	Boost_lib_LDFLAGS="-L$boost_ldpath $boost_cv_rpath_link_ldflag$boost_ldpath"
[a0ddcf]	480	Boost_lib_LDPATH="$boost_ldpath"
[6309fd]	481	break 7
[a0ddcf]	482	else
	483	boost_failed_libs="$boost_failed_libs@$boost_lib@"
	484	fi
	485	done
	486	done
	487	done
	488	done
	489	done
	490	done
[6309fd]	491	done # boost_lib_
[a0ddcf]	492	rm -f conftest.$ac_objext
	493	])
[6309fd]	494
[a0ddcf]	495
	496
	497	# --------------------------------------- #
	498	# Checks for the various Boost libraries. #
	499	# --------------------------------------- #
	500
	501	# List of boost libraries: http://www.boost.org/libs/libraries.htm
	502	# The page http://beta.boost.org/doc/libs is useful: it gives the first release
	503	# version of each library (among other things).
	504
	505	# BOOST_DEFUN(LIBRARY, CODE)
	506	# --------------------------
	507	# Define BOOST_<LIBRARY-UPPERCASE> as a macro that runs CODE.
	508	#
	509	# Use indir to avoid the warning on underquoted macro name given to AC_DEFUN.
	510	m4_define([BOOST_DEFUN],
	511	[m4_indir([AC_DEFUN],
	512	m4_toupper([BOOST_$1]),
	513	[m4_pushdef([BOOST_Library], [$1])dnl
	514	$2
	515	m4_popdef([BOOST_Library])dnl
	516	])
	517	])
	518
	519	# BOOST_ARRAY()
	520	# -------------
	521	# Look for Boost.Array
	522	BOOST_DEFUN([Array],
	523	[BOOST_FIND_HEADER([boost/array.hpp])])
	524
	525
	526	# BOOST_ASIO()
	527	# ------------
	528	# Look for Boost.Asio (new in Boost 1.35).
	529	BOOST_DEFUN([Asio],
	530	[AC_REQUIRE([BOOST_SYSTEM])dnl
	531	BOOST_FIND_HEADER([boost/asio.hpp])])
	532
	533
	534	# BOOST_BIND()
	535	# ------------
[6309fd]	536	# Look for Boost.Bind.
[a0ddcf]	537	BOOST_DEFUN([Bind],
	538	[BOOST_FIND_HEADER([boost/bind.hpp])])
	539
	540
[6309fd]	541	# BOOST_CHRONO()
	542	# --------------
	543	# Look for Boost.Chrono.
	544	BOOST_DEFUN([Chrono],
	545	[# Do we have to check for Boost.System? This link-time dependency was
	546	# added as of 1.35.0. If we have a version <1.35, we must not attempt to
	547	# find Boost.System as it didn't exist by then.
	548	if test $boost_major_version -ge 135; then
	549	BOOST_SYSTEM([$1])
	550	fi # end of the Boost.System check.
	551	boost_filesystem_save_LIBS=$LIBS
	552	boost_filesystem_save_LDFLAGS=$LDFLAGS
	553	m4_pattern_allow([^BOOST_SYSTEM_(LIBS\|LDFLAGS)$])dnl
	554	LIBS="$LIBS $BOOST_SYSTEM_LIBS"
	555	LDFLAGS="$LDFLAGS $BOOST_SYSTEM_LDFLAGS"
	556	BOOST_FIND_LIB([chrono], [$1],
	557	[boost/chrono.hpp],
	558	[boost::chrono::thread_clock d;])
	559	if test $enable_static_boost = yes && test $boost_major_version -ge 135; then
	560	BOOST_FILESYSTEM_LIBS="$BOOST_FILESYSTEM_LIBS $BOOST_SYSTEM_LIBS"
	561	fi
	562	LIBS=$boost_filesystem_save_LIBS
	563	LDFLAGS=$boost_filesystem_save_LDFLAGS
	564	])# BOOST_CHRONO
	565
	566
[a0ddcf]	567	# BOOST_CONVERSION()
	568	# ------------------
	569	# Look for Boost.Conversion (cast / lexical_cast)
	570	BOOST_DEFUN([Conversion],
	571	[BOOST_FIND_HEADER([boost/cast.hpp])
	572	BOOST_FIND_HEADER([boost/lexical_cast.hpp])
	573	])# BOOST_CONVERSION
	574
	575
[6309fd]	576	# BOOST_CRC()
	577	# -----------
	578	# Look for Boost.CRC
	579	BOOST_DEFUN([CRC],
	580	[BOOST_FIND_HEADER([boost/crc.hpp])
	581	])# BOOST_CRC
	582
	583
[a0ddcf]	584	# BOOST_DATE_TIME([PREFERRED-RT-OPT])
	585	# -----------------------------------
	586	# Look for Boost.Date_Time. For the documentation of PREFERRED-RT-OPT, see the
	587	# documentation of BOOST_FIND_LIB above.
	588	BOOST_DEFUN([Date_Time],
	589	[BOOST_FIND_LIB([date_time], [$1],
	590	[boost/date_time/posix_time/posix_time.hpp],
	591	[boost::posix_time::ptime t;])
	592	])# BOOST_DATE_TIME
	593
	594
[f5adb5]	595	# BOOST_EXCEPTION()
	596	# ------------
	597	# Look for Boost.Exception
	598	BOOST_DEFUN([Exception],
	599	[BOOST_FIND_HEADER([boost/exception/all.hpp])])
	600
	601
[a0ddcf]	602	# BOOST_FILESYSTEM([PREFERRED-RT-OPT])
	603	# ------------------------------------
	604	# Look for Boost.Filesystem. For the documentation of PREFERRED-RT-OPT, see
	605	# the documentation of BOOST_FIND_LIB above.
	606	# Do not check for boost/filesystem.hpp because this file was introduced in
	607	# 1.34.
	608	BOOST_DEFUN([Filesystem],
	609	[# Do we have to check for Boost.System? This link-time dependency was
	610	# added as of 1.35.0. If we have a version <1.35, we must not attempt to
	611	# find Boost.System as it didn't exist by then.
	612	if test $boost_major_version -ge 135; then
[6309fd]	613	BOOST_SYSTEM([$1])
[a0ddcf]	614	fi # end of the Boost.System check.
	615	boost_filesystem_save_LIBS=$LIBS
	616	boost_filesystem_save_LDFLAGS=$LDFLAGS
	617	m4_pattern_allow([^BOOST_SYSTEM_(LIBS\|LDFLAGS)$])dnl
	618	LIBS="$LIBS $BOOST_SYSTEM_LIBS"
	619	LDFLAGS="$LDFLAGS $BOOST_SYSTEM_LDFLAGS"
	620	BOOST_FIND_LIB([filesystem], [$1],
	621	[boost/filesystem/path.hpp], [boost::filesystem::path p;])
	622	if test $enable_static_boost = yes && test $boost_major_version -ge 135; then
[6309fd]	623	BOOST_FILESYSTEM_LIBS="$BOOST_FILESYSTEM_LIBS $BOOST_SYSTEM_LIBS"
[a0ddcf]	624	fi
	625	LIBS=$boost_filesystem_save_LIBS
	626	LDFLAGS=$boost_filesystem_save_LDFLAGS
	627	])# BOOST_FILESYSTEM
	628
	629
[6309fd]	630	# BOOST_FLYWEIGHT()
	631	# -----------------
	632	# Look for Boost.Flyweight.
	633	BOOST_DEFUN([Flyweight],
	634	[dnl There's a hidden dependency on pthreads.
	635	AC_REQUIRE([_BOOST_PTHREAD_FLAG])dnl
	636	BOOST_FIND_HEADER([boost/flyweight.hpp])
	637	AC_SUBST([BOOST_FLYWEIGHT_LIBS], [$boost_cv_pthread_flag])
	638	])
	639
	640
[a0ddcf]	641	# BOOST_FOREACH()
	642	# ---------------
[6309fd]	643	# Look for Boost.Foreach.
[a0ddcf]	644	BOOST_DEFUN([Foreach],
	645	[BOOST_FIND_HEADER([boost/foreach.hpp])])
	646
	647
	648	# BOOST_FORMAT()
	649	# --------------
[6309fd]	650	# Look for Boost.Format.
[a0ddcf]	651	# Note: we can't check for boost/format/format_fwd.hpp because the header isn't
	652	# standalone. It can't be compiled because it triggers the following error:
	653	# boost/format/detail/config_macros.hpp:88: error: 'locale' in namespace 'std'
	654	# does not name a type
	655	BOOST_DEFUN([Format],
	656	[BOOST_FIND_HEADER([boost/format.hpp])])
	657
	658
	659	# BOOST_FUNCTION()
	660	# ----------------
	661	# Look for Boost.Function
	662	BOOST_DEFUN([Function],
	663	[BOOST_FIND_HEADER([boost/function.hpp])])
	664
	665
[6309fd]	666	# BOOST_GEOMETRY()
	667	# ----------------
	668	# Look for Boost.Geometry (new since 1.47.0).
	669	BOOST_DEFUN([Geometry],
	670	[BOOST_FIND_HEADER([boost/geometry.hpp])
	671	])# BOOST_GEOMETRY
	672
	673
[a0ddcf]	674	# BOOST_GRAPH([PREFERRED-RT-OPT])
	675	# -------------------------------
	676	# Look for Boost.Graphs. For the documentation of PREFERRED-RT-OPT, see the
	677	# documentation of BOOST_FIND_LIB above.
	678	BOOST_DEFUN([Graph],
	679	[BOOST_FIND_LIB([graph], [$1],
	680	[boost/graph/adjacency_list.hpp], [boost::adjacency_list<> g;])
	681	])# BOOST_GRAPH
	682
	683
	684	# BOOST_IOSTREAMS([PREFERRED-RT-OPT])
	685	# -----------------------------------
	686	# Look for Boost.IOStreams. For the documentation of PREFERRED-RT-OPT, see the
	687	# documentation of BOOST_FIND_LIB above.
	688	BOOST_DEFUN([IOStreams],
	689	[BOOST_FIND_LIB([iostreams], [$1],
	690	[boost/iostreams/device/file_descriptor.hpp],
	691	[boost::iostreams::file_descriptor fd; fd.close();])
	692	])# BOOST_IOSTREAMS
	693
	694
	695	# BOOST_HASH()
	696	# ------------
	697	# Look for Boost.Functional/Hash
	698	BOOST_DEFUN([Hash],
	699	[BOOST_FIND_HEADER([boost/functional/hash.hpp])])
	700
	701
[f5adb5]	702	# BOOST_ITERATOR()
	703	# ------------
	704	# Look for Boost.Iterator
	705	BOOST_DEFUN([Iterator],
	706	[BOOST_FIND_HEADER([boost/iterator/iterator_adaptor.hpp])])
	707
	708
[a0ddcf]	709	# BOOST_LAMBDA()
	710	# --------------
	711	# Look for Boost.Lambda
	712	BOOST_DEFUN([Lambda],
	713	[BOOST_FIND_HEADER([boost/lambda/lambda.hpp])])
	714
	715
[bffe54]	716	# BOOST_LOG([PREFERRED-RT-OPT])
	717	# -----------------------------
[6309fd]	718	# Look for Boost.Log. For the documentation of PREFERRED-RT-OPT, see the
[bffe54]	719	# documentation of BOOST_FIND_LIB above.
	720	BOOST_DEFUN([Log],
	721	[BOOST_FIND_LIB([log], [$1],
	722	[boost/log/core/core.hpp],
	723	[boost::log::attribute a; a.get_value();])
	724	])# BOOST_LOG
	725
	726
	727	# BOOST_LOG_SETUP([PREFERRED-RT-OPT])
	728	# -----------------------------------
[6309fd]	729	# Look for Boost.Log. For the documentation of PREFERRED-RT-OPT, see the
[bffe54]	730	# documentation of BOOST_FIND_LIB above.
	731	BOOST_DEFUN([Log_Setup],
	732	[AC_REQUIRE([BOOST_LOG])dnl
	733	BOOST_FIND_LIB([log_setup], [$1],
[6309fd]	734	[boost/log/utility/setup/from_settings.hpp],
[bffe54]	735	[boost::log::basic_settings<char> bs; bs.empty();])
	736	])# BOOST_LOG_SETUP
	737
	738
[a0ddcf]	739	# BOOST_MATH()
	740	# ------------
	741	# Look for Boost.Math
	742	# TODO: This library isn't header-only but it comes in multiple different
	743	# flavors that don't play well with BOOST_FIND_LIB (e.g, libboost_math_c99,
	744	# libboost_math_c99f, libboost_math_c99l, libboost_math_tr1,
	745	# libboost_math_tr1f, libboost_math_tr1l). This macro must be fixed to do the
	746	# right thing anyway.
	747	BOOST_DEFUN([Math],
	748	[BOOST_FIND_HEADER([boost/math/special_functions.hpp])])
	749
	750
[6309fd]	751	# BOOST_MPI([PREFERRED-RT-OPT])
	752	# -------------------------------
	753	# Look for Boost MPI. For the documentation of PREFERRED-RT-OPT, see the
	754	# documentation of BOOST_FIND_LIB above. Uses MPICXX variable if it is
	755	# set, otherwise tries CXX
	756	#
	757	BOOST_DEFUN([MPI],
	758	[boost_save_CXX=${CXX}
	759	boost_save_CXXCPP=${CXXCPP}
	760	if test x"${MPICXX}" != x; then
	761	CXX=${MPICXX}
	762	CXXCPP="${MPICXX} -E"
	763	fi
	764	BOOST_FIND_LIB([mpi], [$1],
	765	[boost/mpi.hpp],
	766	[int argc = 0;
	767	char **argv = 0;
	768	boost::mpi::environment env(argc,argv);])
	769	CXX=${boost_save_CXX}
	770	CXXCPP=${boost_save_CXXCPP}
	771	])# BOOST_MPI
	772
	773
[a0ddcf]	774	# BOOST_MULTIARRAY()
	775	# ------------------
	776	# Look for Boost.MultiArray
	777	BOOST_DEFUN([MultiArray],
	778	[BOOST_FIND_HEADER([boost/multi_array.hpp])])
	779
	780
[6309fd]	781	# BOOST_NUMERIC_UBLAS()
	782	# --------------------------
	783	# Look for Boost.NumericUblas (Basic Linear Algebra)
	784	BOOST_DEFUN([Numeric_Ublas],
	785	[BOOST_FIND_HEADER([boost/numeric/ublas/vector.hpp])
	786	])# BOOST_NUMERIC_UBLAS
	787
	788
[a0ddcf]	789	# BOOST_NUMERIC_CONVERSION()
	790	# --------------------------
	791	# Look for Boost.NumericConversion (policy-based numeric conversion)
	792	BOOST_DEFUN([Numeric_Conversion],
	793	[BOOST_FIND_HEADER([boost/numeric/conversion/converter.hpp])
	794	])# BOOST_NUMERIC_CONVERSION
	795
	796
	797	# BOOST_OPTIONAL()
	798	# ----------------
	799	# Look for Boost.Optional
	800	BOOST_DEFUN([Optional],
	801	[BOOST_FIND_HEADER([boost/optional.hpp])])
	802
	803
	804	# BOOST_PREPROCESSOR()
	805	# --------------------
	806	# Look for Boost.Preprocessor
	807	BOOST_DEFUN([Preprocessor],
	808	[BOOST_FIND_HEADER([boost/preprocessor/repeat.hpp])])
	809
	810
[bffe54]	811	# BOOST_UNORDERED()
	812	# -----------------
	813	# Look for Boost.Unordered
	814	BOOST_DEFUN([Unordered],
	815	[BOOST_FIND_HEADER([boost/unordered_map.hpp])])
	816
	817
	818	# BOOST_UUID()
	819	# ------------
	820	# Look for Boost.Uuid
	821	BOOST_DEFUN([Uuid],
	822	[BOOST_FIND_HEADER([boost/uuid/uuid.hpp])])
	823
	824
[a0ddcf]	825	# BOOST_PROGRAM_OPTIONS([PREFERRED-RT-OPT])
	826	# -----------------------------------------
	827	# Look for Boost.Program_options. For the documentation of PREFERRED-RT-OPT,
	828	# see the documentation of BOOST_FIND_LIB above.
	829	BOOST_DEFUN([Program_Options],
	830	[BOOST_FIND_LIB([program_options], [$1],
	831	[boost/program_options.hpp],
	832	[boost::program_options::options_description d("test");])
	833	])# BOOST_PROGRAM_OPTIONS
	834
	835
	836
	837	# _BOOST_PYTHON_CONFIG(VARIABLE, FLAG)
	838	# ------------------------------------
	839	# Save VARIABLE, and define it via `python-config --FLAG`.
	840	# Substitute BOOST_PYTHON_VARIABLE.
	841	m4_define([_BOOST_PYTHON_CONFIG],
	842	[AC_SUBST([BOOST_PYTHON_$1],
	843	[`python-config --$2 2>/dev/null`])dnl
	844	boost_python_save_$1=$$1
	845	$1="$$1 $BOOST_PYTHON_$1"])
	846
	847
	848	# BOOST_PYTHON([PREFERRED-RT-OPT])
	849	# --------------------------------
	850	# Look for Boost.Python. For the documentation of PREFERRED-RT-OPT,
	851	# see the documentation of BOOST_FIND_LIB above.
	852	BOOST_DEFUN([Python],
	853	[_BOOST_PYTHON_CONFIG([CPPFLAGS], [includes])
	854	_BOOST_PYTHON_CONFIG([LDFLAGS], [ldflags])
	855	_BOOST_PYTHON_CONFIG([LIBS], [libs])
	856	m4_pattern_allow([^BOOST_PYTHON_MODULE$])dnl
[6309fd]	857	BOOST_FIND_LIBS([python], [python python3], [$1],
	858	[boost/python.hpp],
	859	[], [BOOST_PYTHON_MODULE(empty) {}])
[a0ddcf]	860	CPPFLAGS=$boost_python_save_CPPFLAGS
	861	LDFLAGS=$boost_python_save_LDFLAGS
	862	LIBS=$boost_python_save_LIBS
	863	])# BOOST_PYTHON
	864
	865
	866	# BOOST_REF()
	867	# -----------
	868	# Look for Boost.Ref
	869	BOOST_DEFUN([Ref],
	870	[BOOST_FIND_HEADER([boost/ref.hpp])])
	871
	872
	873	# BOOST_REGEX([PREFERRED-RT-OPT])
	874	# -------------------------------
	875	# Look for Boost.Regex. For the documentation of PREFERRED-RT-OPT, see the
	876	# documentation of BOOST_FIND_LIB above.
	877	BOOST_DEFUN([Regex],
	878	[BOOST_FIND_LIB([regex], [$1],
	879	[boost/regex.hpp],
	880	[boost::regex exp("*"); boost::regex_match("foo", exp);])
	881	])# BOOST_REGEX
	882
	883
	884	# BOOST_SERIALIZATION([PREFERRED-RT-OPT])
	885	# ---------------------------------------
	886	# Look for Boost.Serialization. For the documentation of PREFERRED-RT-OPT, see
	887	# the documentation of BOOST_FIND_LIB above.
	888	BOOST_DEFUN([Serialization],
	889	[BOOST_FIND_LIB([serialization], [$1],
	890	[boost/archive/text_oarchive.hpp],
	891	[std::ostream* o = 0; // Cheap way to get an ostream...
	892	boost::archive::text_oarchive t(*o);])
[bffe54]	893	])# BOOST_SERIALIZATION
[a0ddcf]	894
	895
	896	# BOOST_SIGNALS([PREFERRED-RT-OPT])
	897	# ---------------------------------
	898	# Look for Boost.Signals. For the documentation of PREFERRED-RT-OPT, see the
	899	# documentation of BOOST_FIND_LIB above.
	900	BOOST_DEFUN([Signals],
	901	[BOOST_FIND_LIB([signals], [$1],
	902	[boost/signal.hpp],
	903	[boost::signal<void ()> s;])
	904	])# BOOST_SIGNALS
	905
	906
[6309fd]	907	# BOOST_SIGNALS2()
	908	# ----------------
	909	# Look for Boost.Signals2 (new since 1.39.0).
	910	BOOST_DEFUN([Signals2],
	911	[BOOST_FIND_HEADER([boost/signals2.hpp])
	912	])# BOOST_SIGNALS2
	913
	914
[a0ddcf]	915	# BOOST_SMART_PTR()
	916	# -----------------
	917	# Look for Boost.SmartPtr
	918	BOOST_DEFUN([Smart_Ptr],
	919	[BOOST_FIND_HEADER([boost/scoped_ptr.hpp])
	920	BOOST_FIND_HEADER([boost/shared_ptr.hpp])
	921	])
	922
	923
	924	# BOOST_STATICASSERT()
	925	# --------------------
	926	# Look for Boost.StaticAssert
	927	BOOST_DEFUN([StaticAssert],
	928	[BOOST_FIND_HEADER([boost/static_assert.hpp])])
	929
	930
	931	# BOOST_STRING_ALGO()
	932	# -------------------
	933	# Look for Boost.StringAlgo
	934	BOOST_DEFUN([String_Algo],
	935	[BOOST_FIND_HEADER([boost/algorithm/string.hpp])
	936	])
	937
	938
	939	# BOOST_SYSTEM([PREFERRED-RT-OPT])
	940	# --------------------------------
	941	# Look for Boost.System. For the documentation of PREFERRED-RT-OPT, see the
	942	# documentation of BOOST_FIND_LIB above. This library was introduced in Boost
	943	# 1.35.0.
	944	BOOST_DEFUN([System],
	945	[BOOST_FIND_LIB([system], [$1],
	946	[boost/system/error_code.hpp],
	947	[boost::system::error_code e; e.clear();])
	948	])# BOOST_SYSTEM
	949
	950
	951	# BOOST_TEST([PREFERRED-RT-OPT])
	952	# ------------------------------
	953	# Look for Boost.Test. For the documentation of PREFERRED-RT-OPT, see the
	954	# documentation of BOOST_FIND_LIB above.
	955	BOOST_DEFUN([Test],
	956	[m4_pattern_allow([^BOOST_CHECK$])dnl
	957	BOOST_FIND_LIB([unit_test_framework], [$1],
	958	[boost/test/unit_test.hpp], [BOOST_CHECK(2 == 2);],
	959	[using boost::unit_test::test_suite;
	960	test_suite* init_unit_test_suite(int argc, char ** argv)
	961	{ return NULL; }])
	962	])# BOOST_TEST
	963
	964
[6309fd]	965	# BOOST_THREAD([PREFERRED-RT-OPT])
[a0ddcf]	966	# ---------------------------------
	967	# Look for Boost.Thread. For the documentation of PREFERRED-RT-OPT, see the
	968	# documentation of BOOST_FIND_LIB above.
[6309fd]	969	BOOST_DEFUN([Thread],
[a0ddcf]	970	[dnl Having the pthread flag is required at least on GCC3 where
	971	dnl boost/thread.hpp would complain if we try to compile without
	972	dnl -pthread on GNU/Linux.
	973	AC_REQUIRE([_BOOST_PTHREAD_FLAG])dnl
[6309fd]	974	boost_thread_save_LIBS=$LIBS
	975	boost_thread_save_LDFLAGS=$LDFLAGS
	976	boost_thread_save_CPPFLAGS=$CPPFLAGS
	977	# Link-time dependency from thread to system was added as of 1.49.0.
	978	if test $boost_major_version -ge 149; then
	979	BOOST_SYSTEM([$1])
	980	fi # end of the Boost.System check.
	981	m4_pattern_allow([^BOOST_SYSTEM_(LIBS\|LDFLAGS)$])dnl
	982	LIBS="$LIBS $BOOST_SYSTEM_LIBS $boost_cv_pthread_flag"
	983	LDFLAGS="$LDFLAGS $BOOST_SYSTEM_LDFLAGS"
[a0ddcf]	984	CPPFLAGS="$CPPFLAGS $boost_cv_pthread_flag"
[6309fd]	985
	986	# When compiling for the Windows platform, the threads library is named
	987	# differently.
	988	case $host_os in
	989	(mingw) boost_thread_lib_ext=_win32;;
	990	esac
	991	BOOST_FIND_LIBS([thread], [thread$boost_thread_lib_ext],
	992	[$1],
	993	[boost/thread.hpp], [boost::thread t; boost::mutex m;])
	994
	995	BOOST_THREAD_LIBS="$BOOST_THREAD_LIBS $BOOST_SYSTEM_LIBS $boost_cv_pthread_flag"
	996	BOOST_THREAD_LDFLAGS="$BOOST_SYSTEM_LDFLAGS"
[a0ddcf]	997	BOOST_CPPFLAGS="$BOOST_CPPFLAGS $boost_cv_pthread_flag"
[6309fd]	998	LIBS=$boost_thread_save_LIBS
	999	LDFLAGS=$boost_thread_save_LDFLAGS
	1000	CPPFLAGS=$boost_thread_save_CPPFLAGS
	1001	])# BOOST_THREAD
	1002
	1003	AU_ALIAS([BOOST_THREADS], [BOOST_THREAD])
[a0ddcf]	1004
	1005
	1006	# BOOST_TOKENIZER()
	1007	# -----------------
	1008	# Look for Boost.Tokenizer
	1009	BOOST_DEFUN([Tokenizer],
	1010	[BOOST_FIND_HEADER([boost/tokenizer.hpp])])
	1011
	1012
	1013	# BOOST_TRIBOOL()
	1014	# ---------------
	1015	# Look for Boost.Tribool
	1016	BOOST_DEFUN([Tribool],
	1017	[BOOST_FIND_HEADER([boost/logic/tribool_fwd.hpp])
	1018	BOOST_FIND_HEADER([boost/logic/tribool.hpp])
	1019	])
	1020
	1021
	1022	# BOOST_TUPLE()
	1023	# -------------
	1024	# Look for Boost.Tuple
	1025	BOOST_DEFUN([Tuple],
	1026	[BOOST_FIND_HEADER([boost/tuple/tuple.hpp])])
	1027
	1028
	1029	# BOOST_TYPETRAITS()
	1030	# --------------------
	1031	# Look for Boost.TypeTraits
	1032	BOOST_DEFUN([TypeTraits],
	1033	[BOOST_FIND_HEADER([boost/type_traits.hpp])])
	1034
	1035
	1036	# BOOST_UTILITY()
	1037	# ---------------
	1038	# Look for Boost.Utility (noncopyable, result_of, base-from-member idiom,
	1039	# etc.)
	1040	BOOST_DEFUN([Utility],
	1041	[BOOST_FIND_HEADER([boost/utility.hpp])])
	1042
	1043
	1044	# BOOST_VARIANT()
	1045	# ---------------
	1046	# Look for Boost.Variant.
	1047	BOOST_DEFUN([Variant],
	1048	[BOOST_FIND_HEADER([boost/variant/variant_fwd.hpp])
	1049	BOOST_FIND_HEADER([boost/variant.hpp])])
	1050
	1051
[6309fd]	1052	# BOOST_POINTER_CONTAINER()
	1053	# ------------------------
	1054	# Look for Boost.PointerContainer
	1055	BOOST_DEFUN([Pointer_Container],
	1056	[BOOST_FIND_HEADER([boost/ptr_container/ptr_deque.hpp])
	1057	BOOST_FIND_HEADER([boost/ptr_container/ptr_list.hpp])
	1058	BOOST_FIND_HEADER([boost/ptr_container/ptr_vector.hpp])
	1059	BOOST_FIND_HEADER([boost/ptr_container/ptr_array.hpp])
	1060	BOOST_FIND_HEADER([boost/ptr_container/ptr_set.hpp])
	1061	BOOST_FIND_HEADER([boost/ptr_container/ptr_map.hpp])
	1062	])# BOOST_POINTER_CONTAINER
	1063
	1064
[a0ddcf]	1065	# BOOST_WAVE([PREFERRED-RT-OPT])
	1066	# ------------------------------
	1067	# NOTE: If you intend to use Wave/Spirit with thread support, make sure you
[6309fd]	1068	# call BOOST_THREAD first.
[a0ddcf]	1069	# Look for Boost.Wave. For the documentation of PREFERRED-RT-OPT, see the
	1070	# documentation of BOOST_FIND_LIB above.
	1071	BOOST_DEFUN([Wave],
	1072	[AC_REQUIRE([BOOST_FILESYSTEM])dnl
	1073	AC_REQUIRE([BOOST_DATE_TIME])dnl
	1074	boost_wave_save_LIBS=$LIBS
	1075	boost_wave_save_LDFLAGS=$LDFLAGS
	1076	m4_pattern_allow([^BOOST_((FILE)?SYSTEM\|DATE_TIME\|THREAD)_(LIBS\|LDFLAGS)$])dnl
[6309fd]	1077	LIBS="$LIBS $BOOST_SYSTEM_LIBS $BOOST_FILESYSTEM_LIBS $BOOST_DATE_TIME_LIBS \
[a0ddcf]	1078	$BOOST_THREAD_LIBS"
[6309fd]	1079	LDFLAGS="$LDFLAGS $BOOST_SYSTEM_LDFLAGS $BOOST_FILESYSTEM_LDFLAGS \
[a0ddcf]	1080	$BOOST_DATE_TIME_LDFLAGS $BOOST_THREAD_LDFLAGS"
	1081	BOOST_FIND_LIB([wave], [$1],
	1082	[boost/wave.hpp],
	1083	[boost::wave::token_id id; get_token_name(id);])
	1084	LIBS=$boost_wave_save_LIBS
	1085	LDFLAGS=$boost_wave_save_LDFLAGS
	1086	])# BOOST_WAVE
	1087
	1088
	1089	# BOOST_XPRESSIVE()
	1090	# -----------------
	1091	# Look for Boost.Xpressive (new since 1.36.0).
	1092	BOOST_DEFUN([Xpressive],
	1093	[BOOST_FIND_HEADER([boost/xpressive/xpressive.hpp])])
	1094
	1095
	1096	# ----------------- #
	1097	# Internal helpers. #
	1098	# ----------------- #
	1099
	1100
	1101	# _BOOST_PTHREAD_FLAG()
	1102	# ---------------------
[6309fd]	1103	# Internal helper for BOOST_THREAD. Computes boost_cv_pthread_flag
	1104	# which must be used in CPPFLAGS and LIBS.
	1105	#
	1106	# Yes, we need to put the -pthread thing in CPPFLAGS because with GCC3,
	1107	# boost/thread.hpp will trigger a #error if -pthread isn't used:
	1108	# boost/config/requires_threads.hpp:47:5: #error "Compiler threading support
	1109	# is not turned on. Please set the correct command line options for
	1110	# threading: -pthread (Linux), -pthreads (Solaris) or -mthreads (Mingw32)"
	1111	#
	1112	# Based on ACX_PTHREAD: http://autoconf-archive.cryp.to/acx_pthread.html
[a0ddcf]	1113	AC_DEFUN([_BOOST_PTHREAD_FLAG],
	1114	[AC_REQUIRE([AC_PROG_CXX])dnl
	1115	AC_REQUIRE([AC_CANONICAL_HOST])dnl
	1116	AC_LANG_PUSH([C++])dnl
	1117	AC_CACHE_CHECK([for the flags needed to use pthreads], [boost_cv_pthread_flag],
	1118	[ boost_cv_pthread_flag=
	1119	# The ordering is (sometimes) important. Some notes on the
	1120	# individual items follow:
	1121	# (none): in case threads are in libc; should be tried before -Kthread and
	1122	# other compiler flags to prevent continual compiler warnings
	1123	# -lpthreads: AIX (must check this before -lpthread)
	1124	# -Kthread: Sequent (threads in libc, but -Kthread needed for pthread.h)
	1125	# -kthread: FreeBSD kernel threads (preferred to -pthread since SMP-able)
	1126	# -llthread: LinuxThreads port on FreeBSD (also preferred to -pthread)
	1127	# -pthread: GNU Linux/GCC (kernel threads), BSD/GCC (userland threads)
	1128	# -pthreads: Solaris/GCC
	1129	# -mthreads: MinGW32/GCC, Lynx/GCC
	1130	# -mt: Sun Workshop C (may only link SunOS threads [-lthread], but it
	1131	# doesn't hurt to check since this sometimes defines pthreads too;
	1132	# also defines -D_REENTRANT)
	1133	# ... -mt is also the pthreads flag for HP/aCC
	1134	# -lpthread: GNU Linux, etc.
	1135	# --thread-safe: KAI C++
	1136	case $host_os in #(
	1137	solaris)
	1138	# On Solaris (at least, for some versions), libc contains stubbed
	1139	# (non-functional) versions of the pthreads routines, so link-based
	1140	# tests will erroneously succeed. (We need to link with -pthreads/-mt/
	1141	# -lpthread.) (The stubs are missing pthread_cleanup_push, or rather
	1142	# a function called by this macro, so we could check for that, but
	1143	# who knows whether they'll stub that too in a future libc.) So,
	1144	# we'll just look for -pthreads and -lpthread first:
	1145	boost_pthread_flags="-pthreads -lpthread -mt -pthread";; #(
	1146	*)
	1147	boost_pthread_flags="-lpthreads -Kthread -kthread -llthread -pthread \
	1148	-pthreads -mthreads -lpthread --thread-safe -mt";;
	1149	esac
	1150	# Generate the test file.
	1151	AC_LANG_CONFTEST([AC_LANG_PROGRAM([#include <pthread.h>],
	1152	[pthread_t th; pthread_join(th, 0);
	1153	pthread_attr_init(0); pthread_cleanup_push(0, 0);
	1154	pthread_create(0,0,0,0); pthread_cleanup_pop(0);])])
	1155	for boost_pthread_flag in '' $boost_pthread_flags; do
	1156	boost_pthread_ok=false
	1157	dnl Re-use the test file already generated.
	1158	boost_pthreads__save_LIBS=$LIBS
	1159	LIBS="$LIBS $boost_pthread_flag"
	1160	AC_LINK_IFELSE([],
	1161	[if grep ".*$boost_pthread_flag" conftest.err; then
	1162	echo "This flag seems to have triggered warnings" >&AS_MESSAGE_LOG_FD
	1163	else
	1164	boost_pthread_ok=:; boost_cv_pthread_flag=$boost_pthread_flag
	1165	fi])
	1166	LIBS=$boost_pthreads__save_LIBS
	1167	$boost_pthread_ok && break
	1168	done
	1169	])
	1170	AC_LANG_POP([C++])dnl
	1171	])# _BOOST_PTHREAD_FLAG
	1172
	1173
	1174	# _BOOST_gcc_test(MAJOR, MINOR)
	1175	# -----------------------------
	1176	# Internal helper for _BOOST_FIND_COMPILER_TAG.
	1177	m4_define([_BOOST_gcc_test],
	1178	["defined __GNUC__ && __GNUC__ == $1 && __GNUC_MINOR__ == $2 && !defined __ICC @ gcc$1$2"])dnl
	1179
[6309fd]	1180	# _BOOST_mingw_test(MAJOR, MINOR)
	1181	# -----------------------------
	1182	# Internal helper for _BOOST_FIND_COMPILER_TAG.
	1183	m4_define([_BOOST_mingw_test],
	1184	["defined __GNUC__ && __GNUC__ == $1 && __GNUC_MINOR__ == $2 && !defined __ICC && \
	1185	(defined WIN32 \|\| defined WINNT \|\| defined _WIN32 \|\| defined __WIN32 \
	1186	\|\| defined __WIN32__ \|\| defined __WINNT \|\| defined __WINNT__) @ mgw$1$2"])dnl
	1187
[a0ddcf]	1188
	1189	# _BOOST_FIND_COMPILER_TAG()
	1190	# --------------------------
	1191	# Internal. When Boost is installed without --layout=system, each library
	1192	# filename will hold a suffix that encodes the compiler used during the
	1193	# build. The Boost build system seems to call this a `tag'.
	1194	AC_DEFUN([_BOOST_FIND_COMPILER_TAG],
	1195	[AC_REQUIRE([AC_PROG_CXX])dnl
	1196	AC_REQUIRE([AC_CANONICAL_HOST])dnl
	1197	AC_CACHE_CHECK([for the toolset name used by Boost for $CXX], [boost_cv_lib_tag],
	1198	[boost_cv_lib_tag=unknown
	1199	if test x$boost_cv_inc_path != xno; then
	1200	AC_LANG_PUSH([C++])dnl
	1201	# The following tests are mostly inspired by boost/config/auto_link.hpp
	1202	# The list is sorted to most recent/common to oldest compiler (in order
	1203	# to increase the likelihood of finding the right compiler with the
	1204	# least number of compilation attempt).
	1205	# Beware that some tests are sensible to the order (for instance, we must
	1206	# look for MinGW before looking for GCC3).
	1207	# I used one compilation test per compiler with a #error to recognize
	1208	# each compiler so that it works even when cross-compiling (let me know
	1209	# if you know a better approach).
	1210	# Known missing tags (known from Boost's tools/build/v2/tools/common.jam):
	1211	# como, edg, kcc, bck, mp, sw, tru, xlc
	1212	# I'm not sure about my test for `il' (be careful: Intel's ICC pre-defines
	1213	# the same defines as GCC's).
	1214	for i in \
[6309fd]	1215	_BOOST_mingw_test(4,8) \
	1216	_BOOST_gcc_test(4, 8) \
	1217	_BOOST_mingw_test(4,7) \
	1218	_BOOST_gcc_test(4, 7) \
	1219	_BOOST_mingw_test(4,6) \
[a0ddcf]	1220	_BOOST_gcc_test(4, 6) \
[6309fd]	1221	_BOOST_mingw_test(4,5) \
[a0ddcf]	1222	_BOOST_gcc_test(4, 5) \
[6309fd]	1223	_BOOST_mingw_test(4,4) \
[a0ddcf]	1224	_BOOST_gcc_test(4, 4) \
[6309fd]	1225	_BOOST_mingw_test(4,3) \
[a0ddcf]	1226	_BOOST_gcc_test(4, 3) \
[6309fd]	1227	_BOOST_mingw_test(4,2) \
[a0ddcf]	1228	_BOOST_gcc_test(4, 2) \
[6309fd]	1229	_BOOST_mingw_test(4,1) \
[a0ddcf]	1230	_BOOST_gcc_test(4, 1) \
[6309fd]	1231	_BOOST_mingw_test(4,0) \
[a0ddcf]	1232	_BOOST_gcc_test(4, 0) \
	1233	"defined __GNUC__ && __GNUC__ == 3 && !defined __ICC \
	1234	&& (defined WIN32 \|\| defined WINNT \|\| defined _WIN32 \|\| defined __WIN32 \
	1235	\|\| defined __WIN32__ \|\| defined __WINNT \|\| defined __WINNT__) @ mgw" \
	1236	_BOOST_gcc_test(3, 4) \
	1237	_BOOST_gcc_test(3, 3) \
	1238	"defined _MSC_VER && _MSC_VER >= 1500 @ vc90" \
	1239	"defined _MSC_VER && _MSC_VER == 1400 @ vc80" \
	1240	_BOOST_gcc_test(3, 2) \
	1241	"defined _MSC_VER && _MSC_VER == 1310 @ vc71" \
	1242	_BOOST_gcc_test(3, 1) \
	1243	_BOOST_gcc_test(3, 0) \
	1244	"defined __BORLANDC__ @ bcb" \
	1245	"defined __ICC && (defined __unix \|\| defined __unix__) @ il" \
	1246	"defined __ICL @ iw" \
	1247	"defined _MSC_VER && _MSC_VER == 1300 @ vc7" \
	1248	_BOOST_gcc_test(2, 95) \
	1249	"defined __MWERKS__ && __MWERKS__ <= 0x32FF @ cw9" \
	1250	"defined _MSC_VER && _MSC_VER < 1300 && !defined UNDER_CE @ vc6" \
	1251	"defined _MSC_VER && _MSC_VER < 1300 && defined UNDER_CE @ evc4" \
	1252	"defined __MWERKS__ && __MWERKS__ <= 0x31FF @ cw8"
	1253	do
	1254	boost_tag_test=`expr "X$i" : 'X\([[^@]]*\) @ '`
	1255	boost_tag=`expr "X$i" : 'X[[^@]]* @ \(.*\)'`
	1256	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
	1257	#if $boost_tag_test
	1258	/* OK */
	1259	#else
	1260	# error $boost_tag_test
	1261	#endif
	1262	]])], [boost_cv_lib_tag=$boost_tag; break], [])
	1263	done
	1264	AC_LANG_POP([C++])dnl
	1265	case $boost_cv_lib_tag in #(
	1266	# Some newer (>= 1.35?) versions of Boost seem to only use "gcc" as opposed
	1267	# to "gcc41" for instance.
	1268	-gcc \| '-gcc ') :;; #( Don't re-add -gcc: it's already in there.
	1269	gcc*)
	1270	boost_tag_x=
	1271	case $host_os in #(
	1272	darwin*)
	1273	if test $boost_major_version -ge 136; then
	1274	# The `x' added in r46793 of Boost.
	1275	boost_tag_x=x
	1276	fi;;
	1277	esac
	1278	# We can specify multiple tags in this variable because it's used by
	1279	# BOOST_FIND_LIB that does a `for tag in -$boost_cv_lib_tag' ...
	1280	boost_cv_lib_tag="$boost_tag_x$boost_cv_lib_tag -${boost_tag_x}gcc"
	1281	;; #(
	1282	unknown)
	1283	AC_MSG_WARN([[could not figure out which toolset name to use for $CXX]])
	1284	boost_cv_lib_tag=
	1285	;;
	1286	esac
	1287	fi])dnl end of AC_CACHE_CHECK
	1288	])# _BOOST_FIND_COMPILER_TAG
	1289
	1290
	1291	# _BOOST_GUESS_WHETHER_TO_USE_MT()
	1292	# --------------------------------
	1293	# Compile a small test to try to guess whether we should favor MT (Multi
	1294	# Thread) flavors of Boost. Sets boost_guess_use_mt accordingly.
	1295	AC_DEFUN([_BOOST_GUESS_WHETHER_TO_USE_MT],
	1296	[# Check whether we do better use `mt' even though we weren't ask to.
[6309fd]	1297	AC_LANG_PUSH([C++])dnl
[a0ddcf]	1298	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
	1299	#if defined _REENTRANT \|\| defined _MT \|\| defined __MT__
	1300	/* use -mt */
	1301	#else
	1302	# error MT not needed
	1303	#endif
	1304	]])], [boost_guess_use_mt=:], [boost_guess_use_mt=false])
[6309fd]	1305	AC_LANG_POP([C++])dnl
[a0ddcf]	1306	])
	1307
	1308	# _BOOST_AC_LINK_IFELSE(PROGRAM, [ACTION-IF-TRUE], [ACTION-IF-FALSE])
	1309	# -------------------------------------------------------------------
	1310	# Fork of _AC_LINK_IFELSE that preserves conftest.o across calls. Fragile,
	1311	# will break when Autoconf changes its internals. Requires that you manually
	1312	# rm -f conftest.$ac_objext in between to really different tests, otherwise
	1313	# you will try to link a conftest.o left behind by a previous test.
	1314	# Used to aggressively optimize BOOST_FIND_LIB (see the big comment in this
	1315	# macro).
	1316	#
	1317	# Don't use "break" in the actions, as it would short-circuit some code
	1318	# this macro runs after the actions.
	1319	m4_define([_BOOST_AC_LINK_IFELSE],
	1320	[m4_ifvaln([$1], [AC_LANG_CONFTEST([$1])])dnl
	1321	rm -f conftest$ac_exeext
	1322	boost_save_ac_ext=$ac_ext
	1323	boost_use_source=:
	1324	# If we already have a .o, re-use it. We change $ac_ext so that $ac_link
	1325	# tries to link the existing object file instead of compiling from source.
	1326	test -f conftest.$ac_objext && ac_ext=$ac_objext && boost_use_source=false &&
	1327	_AS_ECHO_LOG([re-using the existing conftest.$ac_objext])
	1328	AS_IF([_AC_DO_STDERR($ac_link) && {
[6309fd]	1329	test -z "$ac_[]_AC_LANG_ABBREV[]_werror_flag" \|\|
	1330	test ! -s conftest.err
[a0ddcf]	1331	} && test -s conftest$ac_exeext && {
[6309fd]	1332	test "$cross_compiling" = yes \|\|
	1333	$as_executable_p conftest$ac_exeext
[a0ddcf]	1334	dnl FIXME: use AS_TEST_X instead when 2.61 is widespread enough.
	1335	}],
	1336	[$2],
	1337	[if $boost_use_source; then
	1338	_AC_MSG_LOG_CONFTEST
	1339	fi
	1340	$3])
	1341	ac_objext=$boost_save_ac_objext
	1342	ac_ext=$boost_save_ac_ext
	1343	dnl Delete also the IPA/IPO (Inter Procedural Analysis/Optimization)
	1344	dnl information created by the PGI compiler (conftest_ipa8_conftest.oo),
	1345	dnl as it would interfere with the next link command.
	1346	rm -f core conftest.err conftest_ipa8_conftest.oo \
	1347	conftest$ac_exeext m4_ifval([$1], [conftest.$ac_ext])[]dnl
	1348	])# _BOOST_AC_LINK_IFELSE
	1349
	1350	# Local Variables:
	1351	# mode: autoconf
	1352	# End:

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