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Last change on this file since 1f06896 was 619a0e, checked in by Frederik Heber <heber@…>, 13 years ago

Added checks for boost::fusion and boost::mpl.

wrote simple header-only checks for boost.m4.

Property mode set to 100644

File size: 42.5 KB

Rev	Line
[79de12]	1	# boost.m4: Locate Boost headers and libraries for autoconf-based projects.
	2	# Copyright (C) 2007, 2008, 2009, 2010, 2011 Benoit Sigoure <tsuna@lrde.epita.fr>
	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([
[f08ae7]	25	# serial 16
[79de12]	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],
	62	[AC_LANG_PREPROC_REQUIRE()dnl
	63	AC_REQUIRE([AC_PROG_SED])dnl
	64	AC_LANG_CONFTEST([AC_LANG_SOURCE([[$2]])])
	65	AS_IF([dnl eval is necessary to expand ac_cpp.
	66	dnl Ultrix and Pyramid sh refuse to redirect output of eval, so use subshell.
	67	dnl Beware of Windows end-of-lines, for instance if we are running
	68	dnl some Windows programs under Wine. In that case, boost/version.hpp
	69	dnl is certainly using "\r\n", but the regular Unix shell will only
	70	dnl strip `\n' with backquotes, not the `\r'. This results in
	71	dnl boost_cv_lib_version='1_37\r' for instance, which breaks
	72	dnl everything else.
	73	dnl Cannot use 'dnl' after [$4] because a trailing dnl may break AC_CACHE_CHECK
	74	(eval "$ac_cpp conftest.$ac_ext") 2>&AS_MESSAGE_LOG_FD \|
	75	tr -d '\r' \|
	76	$SED -n -e "$1" >conftest.i 2>&1],
	77	[$3],
	78	[$4])
	79	rm -rf conftest*
	80	])# AC_EGREP_CPP
	81
	82
	83
	84	# BOOST_REQUIRE([VERSION], [ACTION-IF-NOT-FOUND])
	85	# -----------------------------------------------
	86	# Look for Boost. If version is given, it must either be a literal of the form
	87	# "X.Y.Z" where X, Y and Z are integers (the ".Z" part being optional) or a
	88	# variable "$var".
	89	# Defines the value BOOST_CPPFLAGS. This macro only checks for headers with
	90	# the required version, it does not check for any of the Boost libraries.
	91	# On # success, defines HAVE_BOOST. On failure, calls the optional
	92	# ACTION-IF-NOT-FOUND action if one was supplied.
	93	# Otherwise aborts with an error message.
	94	AC_DEFUN([BOOST_REQUIRE],
	95	[AC_REQUIRE([AC_PROG_CXX])dnl
	96	AC_REQUIRE([AC_PROG_GREP])dnl
	97	echo "$as_me: this is boost.m4[]_BOOST_SERIAL" >&AS_MESSAGE_LOG_FD
	98	boost_save_IFS=$IFS
	99	boost_version_req=$1
	100	IFS=.
	101	set x $boost_version_req 0 0 0
	102	IFS=$boost_save_IFS
	103	shift
	104	boost_version_req=`expr "$[1]" '' 100000 + "$[2]" '' 100 + "$[3]"`
	105	boost_version_req_string=$[1].$[2].$[3]
	106	AC_ARG_WITH([boost],
	107	[AS_HELP_STRING([--with-boost=DIR],
	108	[prefix of Boost $1 @<:@guess@:>@])])dnl
	109	AC_ARG_VAR([BOOST_ROOT],[Location of Boost installation])dnl
	110	# If BOOST_ROOT is set and the user has not provided a value to
	111	# --with-boost, then treat BOOST_ROOT as if it the user supplied it.
	112	if test x"$BOOST_ROOT" != x; then
	113	if test x"$with_boost" = x; then
	114	AC_MSG_NOTICE([Detected BOOST_ROOT; continuing with --with-boost=$BOOST_ROOT])
	115	with_boost=$BOOST_ROOT
	116	else
	117	AC_MSG_NOTICE([Detected BOOST_ROOT=$BOOST_ROOT, but overridden by --with-boost=$with_boost])
	118	fi
	119	fi
	120	AC_SUBST([DISTCHECK_CONFIGURE_FLAGS],
	121	["$DISTCHECK_CONFIGURE_FLAGS '--with-boost=$with_boost'"])dnl
	122	boost_save_CPPFLAGS=$CPPFLAGS
	123	AC_CACHE_CHECK([for Boost headers version >= $boost_version_req_string],
	124	[boost_cv_inc_path],
	125	[boost_cv_inc_path=no
	126	AC_LANG_PUSH([C++])dnl
	127	m4_pattern_allow([^BOOST_VERSION$])dnl
	128	AC_LANG_CONFTEST([AC_LANG_PROGRAM([[#include <boost/version.hpp>
	129	#if !defined BOOST_VERSION
	130	# error BOOST_VERSION is not defined
	131	#elif BOOST_VERSION < $boost_version_req
	132	# error Boost headers version < $boost_version_req
	133	#endif
	134	]])])
	135	# If the user provided a value to --with-boost, use it and only it.
	136	case $with_boost in #(
[004ae7]	137	''\|yes) set x '' /usr/local/include /usr/include \
	138	/opt/local/include /opt/include \
	139	C:/Boost/include;; #(
[79de12]	140	*) set x "$with_boost/include" "$with_boost";;
	141	esac
	142	shift
	143	for boost_dir
	144	do
	145	# Without --layout=system, Boost (or at least some versions) installs
	146	# itself in <prefix>/include/boost-<version>. This inner loop helps to
	147	# find headers in such directories.
	148	#
	149	# Any ${boost_dir}/boost-x_xx directories are searched in reverse version
	150	# order followed by ${boost_dir}. The final '.' is a sentinel for
	151	# searching $boost_dir" itself. Entries are whitespace separated.
	152	#
	153	# I didn't indent this loop on purpose (to avoid over-indented code)
	154	boost_layout_system_search_list=`cd "$boost_dir" 2>/dev/null \
	155	&& ls -1 \| "${GREP}" '^boost-' \| sort -rn -t- -k2 \
	156	&& echo .`
	157	for boost_inc in $boost_layout_system_search_list
	158	do
	159	if test x"$boost_inc" != x.; then
	160	boost_inc="$boost_dir/$boost_inc"
	161	else
	162	boost_inc="$boost_dir" # Uses sentinel in boost_layout_system_search_list
	163	fi
	164	if test x"$boost_inc" != x; then
	165	# We are going to check whether the version of Boost installed
	166	# in $boost_inc is usable by running a compilation that
	167	# #includes it. But if we pass a -I/some/path in which Boost
	168	# is not installed, the compiler will just skip this -I and
	169	# use other locations (either from CPPFLAGS, or from its list
	170	# of system include directories). As a result we would use
	171	# header installed on the machine instead of the /some/path
	172	# specified by the user. So in that precise case (trying
	173	# $boost_inc), make sure the version.hpp exists.
	174	#
	175	# Use test -e as there can be symlinks.
	176	test -e "$boost_inc/boost/version.hpp" \|\| continue
	177	CPPFLAGS="$CPPFLAGS -I$boost_inc"
	178	fi
	179	AC_COMPILE_IFELSE([], [boost_cv_inc_path=yes], [boost_cv_version=no])
	180	if test x"$boost_cv_inc_path" = xyes; then
	181	if test x"$boost_inc" != x; then
	182	boost_cv_inc_path=$boost_inc
	183	fi
	184	break 2
	185	fi
	186	done
	187	done
	188	AC_LANG_POP([C++])dnl
	189	])
	190	case $boost_cv_inc_path in #(
	191	no)
	192	boost_errmsg="cannot find Boost headers version >= $boost_version_req_string"
	193	m4_if([$2], [], [AC_MSG_ERROR([$boost_errmsg])],
	194	[AC_MSG_NOTICE([$boost_errmsg])])
	195	$2
	196	;;#(
	197	yes)
	198	BOOST_CPPFLAGS=
	199	;;#(
	200	*)
	201	AC_SUBST([BOOST_CPPFLAGS], ["-I$boost_cv_inc_path"])dnl
	202	;;
	203	esac
	204	if test x"$boost_cv_inc_path" != xno; then
	205	AC_DEFINE([HAVE_BOOST], [1],
	206	[Defined if the requested minimum BOOST version is satisfied])
	207	AC_CACHE_CHECK([for Boost's header version],
	208	[boost_cv_lib_version],
	209	[m4_pattern_allow([^BOOST_LIB_VERSION$])dnl
	210	_BOOST_SED_CPP([/^boost-lib-version = /{s///;s/\"//g;p;q;}],
	211	[#include <boost/version.hpp>
	212	boost-lib-version = BOOST_LIB_VERSION],
	213	[boost_cv_lib_version=`cat conftest.i`])])
	214	# e.g. "134" for 1_34_1 or "135" for 1_35
	215	boost_major_version=`echo "$boost_cv_lib_version" \| sed 's/_//;s/_.*//'`
	216	case $boost_major_version in #(
	217	'' \| [[!0-9]])
	218	AC_MSG_ERROR([invalid value: boost_major_version=$boost_major_version])
	219	;;
	220	esac
	221	fi
	222	CPPFLAGS=$boost_save_CPPFLAGS
	223	])# BOOST_REQUIRE
	224
	225	# BOOST_STATIC()
	226	# --------------
	227	# Add the "--enable-static-boost" configure argument. If this argument is given
	228	# on the command line, static versions of the libraries will be looked up.
	229	AC_DEFUN([BOOST_STATIC],
	230	[AC_ARG_ENABLE([static-boost],
	231	[AC_HELP_STRING([--enable-static-boost],
	232	[Prefer the static boost libraries over the shared ones [no]])],
	233	[enable_static_boost=yes],
	234	[enable_static_boost=no])])# BOOST_STATIC
	235
	236	# BOOST_FIND_HEADER([HEADER-NAME], [ACTION-IF-NOT-FOUND], [ACTION-IF-FOUND])
	237	# --------------------------------------------------------------------------
	238	# Wrapper around AC_CHECK_HEADER for Boost headers. Useful to check for
	239	# some parts of the Boost library which are only made of headers and don't
	240	# require linking (such as Boost.Foreach).
	241	#
	242	# Default ACTION-IF-NOT-FOUND: Fail with a fatal error unless Boost couldn't be
	243	# found in the first place, in which case by default a notice is issued to the
	244	# user. Presumably if we haven't died already it's because it's OK to not have
	245	# Boost, which is why only a notice is issued instead of a hard error.
	246	#
	247	# Default ACTION-IF-FOUND: define the preprocessor symbol HAVE_<HEADER-NAME> in
	248	# case of success # (where HEADER-NAME is written LIKE_THIS, e.g.,
	249	# HAVE_BOOST_FOREACH_HPP).
	250	AC_DEFUN([BOOST_FIND_HEADER],
	251	[AC_REQUIRE([BOOST_REQUIRE])dnl
	252	if test x"$boost_cv_inc_path" = xno; then
	253	m4_default([$2], [AC_MSG_NOTICE([Boost not available, not searching for $1])])
	254	else
	255	AC_LANG_PUSH([C++])dnl
	256	boost_save_CPPFLAGS=$CPPFLAGS
	257	CPPFLAGS="$CPPFLAGS $BOOST_CPPFLAGS"
	258	AC_CHECK_HEADER([$1],
	259	[m4_default([$3], [AC_DEFINE(AS_TR_CPP([HAVE_$1]), [1],
	260	[Define to 1 if you have <$1>])])],
	261	[m4_default([$2], [AC_MSG_ERROR([cannot find $1])])])
	262	CPPFLAGS=$boost_save_CPPFLAGS
	263	AC_LANG_POP([C++])dnl
	264	fi
	265	])# BOOST_FIND_HEADER
	266
	267
	268	# BOOST_FIND_LIB([LIB-NAME], [PREFERRED-RT-OPT], [HEADER-NAME], [CXX-TEST],
	269	# [CXX-PROLOGUE])
	270	# -------------------------------------------------------------------------
	271	# Look for the Boost library LIB-NAME (e.g., LIB-NAME = `thread', for
	272	# libboost_thread). Check that HEADER-NAME works and check that
	273	# libboost_LIB-NAME can link with the code CXX-TEST. The optional argument
	274	# CXX-PROLOGUE can be used to include some C++ code before the `main'
	275	# function.
	276	#
	277	# Invokes BOOST_FIND_HEADER([HEADER-NAME]) (see above).
	278	#
	279	# Boost libraries typically come compiled with several flavors (with different
	280	# runtime options) so PREFERRED-RT-OPT is the preferred suffix. A suffix is one
	281	# or more of the following letters: sgdpn (in that order). s = static
	282	# runtime, d = debug build, g = debug/diagnostic runtime, p = STLPort build,
	283	# n = (unsure) STLPort build without iostreams from STLPort (it looks like `n'
	284	# must always be used along with `p'). Additionally, PREFERRED-RT-OPT can
	285	# start with `mt-' to indicate that there is a preference for multi-thread
	286	# builds. Some sample values for PREFERRED-RT-OPT: (nothing), mt, d, mt-d, gdp
	287	# ... If you want to make sure you have a specific version of Boost
	288	# (eg, >= 1.33) you must invoke BOOST_REQUIRE before this macro.
	289	AC_DEFUN([BOOST_FIND_LIB],
	290	[AC_REQUIRE([BOOST_REQUIRE])dnl
	291	AC_REQUIRE([_BOOST_FIND_COMPILER_TAG])dnl
	292	AC_REQUIRE([BOOST_STATIC])dnl
	293	AC_REQUIRE([_BOOST_GUESS_WHETHER_TO_USE_MT])dnl
	294	if test x"$boost_cv_inc_path" = xno; then
	295	AC_MSG_NOTICE([Boost not available, not searching for the Boost $1 library])
	296	else
	297	dnl The else branch is huge and wasn't intended on purpose.
	298	AC_LANG_PUSH([C++])dnl
	299	AS_VAR_PUSHDEF([Boost_lib], [boost_cv_lib_$1])dnl
	300	AS_VAR_PUSHDEF([Boost_lib_LDFLAGS], [boost_cv_lib_$1_LDFLAGS])dnl
	301	AS_VAR_PUSHDEF([Boost_lib_LDPATH], [boost_cv_lib_$1_LDPATH])dnl
	302	AS_VAR_PUSHDEF([Boost_lib_LIBS], [boost_cv_lib_$1_LIBS])dnl
	303	BOOST_FIND_HEADER([$3])
	304	boost_save_CPPFLAGS=$CPPFLAGS
	305	CPPFLAGS="$CPPFLAGS $BOOST_CPPFLAGS"
	306	# Now let's try to find the library. The algorithm is as follows: first look
	307	# for a given library name according to the user's PREFERRED-RT-OPT. For each
	308	# library name, we prefer to use the ones that carry the tag (toolset name).
	309	# Each library is searched through the various standard paths were Boost is
	310	# usually installed. If we can't find the standard variants, we try to
	311	# enforce -mt (for instance on MacOSX, libboost_threads.dylib doesn't exist
	312	# but there's -obviously- libboost_threads-mt.dylib).
	313	AC_CACHE_CHECK([for the Boost $1 library], [Boost_lib],
	314	[Boost_lib=no
	315	case "$2" in #(
	316	mt \| mt-) boost_mt=-mt; boost_rtopt=;; #(
	317	mt* \| mt-) boost_mt=-mt; boost_rtopt=`expr "X$2" : 'Xmt-$.*$'`;; #(
	318	*) boost_mt=; boost_rtopt=$2;;
	319	esac
	320	if test $enable_static_boost = yes; then
	321	boost_rtopt="s$boost_rtopt"
	322	fi
	323	# Find the proper debug variant depending on what we've been asked to find.
	324	case $boost_rtopt in #(
	325	d) boost_rt_d=$boost_rtopt;; #(
	326	[[sgpn]]) # Insert the `d' at the right place (in between `sg' and `pn')
	327	boost_rt_d=`echo "$boost_rtopt" \| sed 's/$sg$$pn$/\1\2/'`;; #(
	328	*) boost_rt_d='-d';;
	329	esac
	330	# If the PREFERRED-RT-OPT are not empty, prepend a `-'.
	331	test -n "$boost_rtopt" && boost_rtopt="-$boost_rtopt"
	332	$boost_guess_use_mt && boost_mt=-mt
	333	# Look for the abs path the static archive.
	334	# $libext is computed by Libtool but let's make sure it's non empty.
	335	test -z "$libext" &&
	336	AC_MSG_ERROR([the libext variable is empty, did you invoke Libtool?])
	337	boost_save_ac_objext=$ac_objext
	338	# Generate the test file.
	339	AC_LANG_CONFTEST([AC_LANG_PROGRAM([#include <$3>
	340	$5], [$4])])
	341	dnl Optimization hacks: compiling C++ is slow, especially with Boost. What
	342	dnl we're trying to do here is guess the right combination of link flags
	343	dnl (LIBS / LDFLAGS) to use a given library. This can take several
	344	dnl iterations before it succeeds and is thus very slow. So what we do
	345	dnl instead is that we compile the code first (and thus get an object file,
	346	dnl typically conftest.o). Then we try various combinations of link flags
	347	dnl until we succeed to link conftest.o in an executable. The problem is
	348	dnl that the various TRY_LINK / COMPILE_IFELSE macros of Autoconf always
	349	dnl remove all the temporary files including conftest.o. So the trick here
	350	dnl is to temporarily change the value of ac_objext so that conftest.o is
	351	dnl preserved accross tests. This is obviously fragile and I will burn in
	352	dnl hell for not respecting Autoconf's documented interfaces, but in the
	353	dnl mean time, it optimizes the macro by a factor of 5 to 30.
	354	dnl Another small optimization: the first argument of AC_COMPILE_IFELSE left
	355	dnl empty because the test file is generated only once above (before we
	356	dnl start the for loops).
	357	AC_COMPILE_IFELSE([],
	358	[ac_objext=do_not_rm_me_plz],
	359	[AC_MSG_ERROR([cannot compile a test that uses Boost $1])])
	360	ac_objext=$boost_save_ac_objext
	361	boost_failed_libs=
	362	# Don't bother to ident the 6 nested for loops, only the 2 innermost ones
	363	# matter.
	364	for boost_tag_ in -$boost_cv_lib_tag ''; do
	365	for boost_ver_ in -$boost_cv_lib_version ''; do
[262ecc]	366	for boost_mt_ in $boost_mt '' -mt; do
[79de12]	367	for boost_rtopt_ in $boost_rtopt '' -d; do
	368	for boost_lib in \
	369	boost_$1$boost_tag_$boost_mt_$boost_rtopt_$boost_ver_ \
	370	boost_$1$boost_tag_$boost_rtopt_$boost_ver_ \
	371	boost_$1$boost_tag_$boost_mt_$boost_ver_ \
	372	boost_$1$boost_tag_$boost_ver_
	373	do
	374	# Avoid testing twice the same lib
	375	case $boost_failed_libs in #(
	376	@$boost_lib@) continue;;
	377	esac
	378	# If with_boost is empty, we'll search in /lib first, which is not quite
	379	# right so instead we'll try to a location based on where the headers are.
	380	boost_tmp_lib=$with_boost
	381	test x"$with_boost" = x && boost_tmp_lib=${boost_cv_inc_path%/include}
	382	for boost_ldpath in "$boost_tmp_lib/lib" '' \
[004ae7]	383	/usr/local/lib* /usr/lib* \
	384	"$with_boost" C:/Boost/lib /lib* \
	385	/opt/local/lib* /opt/lib*
[79de12]	386	do
	387	test -e "$boost_ldpath" \|\| continue
	388	boost_save_LDFLAGS=$LDFLAGS
	389	# Are we looking for a static library?
	390	case $boost_ldpath:$boost_rtopt_ in #(
	391	?:s) # Yes (Non empty boost_ldpath + s in rt opt)
	392	Boost_lib_LIBS="$boost_ldpath/lib$boost_lib.$libext"
	393	test -e "$Boost_lib_LIBS" \|\| continue;; #(
	394	*) # No: use -lboost_foo to find the shared library.
	395	Boost_lib_LIBS="-l$boost_lib";;
	396	esac
	397	boost_save_LIBS=$LIBS
	398	LIBS="$Boost_lib_LIBS $LIBS"
	399	test x"$boost_ldpath" != x && LDFLAGS="$LDFLAGS -L$boost_ldpath"
	400	dnl First argument of AC_LINK_IFELSE left empty because the test file is
	401	dnl generated only once above (before we start the for loops).
	402	_BOOST_AC_LINK_IFELSE([],
	403	[Boost_lib=yes], [Boost_lib=no])
	404	ac_objext=$boost_save_ac_objext
	405	LDFLAGS=$boost_save_LDFLAGS
	406	LIBS=$boost_save_LIBS
	407	if test x"$Boost_lib" = xyes; then
	408	Boost_lib_LDFLAGS="-L$boost_ldpath -Wl,-R$boost_ldpath"
	409	Boost_lib_LDPATH="$boost_ldpath"
	410	break 6
	411	else
	412	boost_failed_libs="$boost_failed_libs@$boost_lib@"
	413	fi
	414	done
	415	done
	416	done
	417	done
	418	done
	419	done
	420	rm -f conftest.$ac_objext
	421	])
	422	case $Boost_lib in #(
	423	no) _AC_MSG_LOG_CONFTEST
	424	AC_MSG_ERROR([cannot find the flags to link with Boost $1])
	425	;;
	426	esac
	427	AC_SUBST(AS_TR_CPP([BOOST_$1_LDFLAGS]), [$Boost_lib_LDFLAGS])dnl
	428	AC_SUBST(AS_TR_CPP([BOOST_$1_LDPATH]), [$Boost_lib_LDPATH])dnl
	429	AC_SUBST([BOOST_LDPATH], [$Boost_lib_LDPATH])dnl
	430	AC_SUBST(AS_TR_CPP([BOOST_$1_LIBS]), [$Boost_lib_LIBS])dnl
	431	CPPFLAGS=$boost_save_CPPFLAGS
	432	AS_VAR_POPDEF([Boost_lib])dnl
	433	AS_VAR_POPDEF([Boost_lib_LDFLAGS])dnl
	434	AS_VAR_POPDEF([Boost_lib_LDPATH])dnl
	435	AS_VAR_POPDEF([Boost_lib_LIBS])dnl
	436	AC_LANG_POP([C++])dnl
	437	fi
	438	])# BOOST_FIND_LIB
	439
	440
	441	# --------------------------------------- #
	442	# Checks for the various Boost libraries. #
	443	# --------------------------------------- #
	444
	445	# List of boost libraries: http://www.boost.org/libs/libraries.htm
	446	# The page http://beta.boost.org/doc/libs is useful: it gives the first release
	447	# version of each library (among other things).
	448
	449	# BOOST_DEFUN(LIBRARY, CODE)
	450	# --------------------------
	451	# Define BOOST_<LIBRARY-UPPERCASE> as a macro that runs CODE.
	452	#
	453	# Use indir to avoid the warning on underquoted macro name given to AC_DEFUN.
	454	m4_define([BOOST_DEFUN],
	455	[m4_indir([AC_DEFUN],
	456	m4_toupper([BOOST_$1]),
	457	[m4_pushdef([BOOST_Library], [$1])dnl
	458	$2
	459	m4_popdef([BOOST_Library])dnl
	460	])
	461	])
	462
[f08ae7]	463
	464	# BOOST_ANY()
	465	# ------------
	466	# Look for Boost.Any
	467	BOOST_DEFUN([Any],
	468	[BOOST_FIND_HEADER([boost/any.hpp])])
	469
	470
[79de12]	471	# BOOST_ARRAY()
	472	# -------------
	473	# Look for Boost.Array
	474	BOOST_DEFUN([Array],
	475	[BOOST_FIND_HEADER([boost/array.hpp])])
	476
	477
	478	# BOOST_ASIO()
	479	# ------------
	480	# Look for Boost.Asio (new in Boost 1.35).
	481	BOOST_DEFUN([Asio],
	482	[AC_REQUIRE([BOOST_SYSTEM])dnl
	483	BOOST_FIND_HEADER([boost/asio.hpp])])
	484
	485
	486	# BOOST_BIND()
	487	# ------------
	488	# Look for Boost.Bind
	489	BOOST_DEFUN([Bind],
	490	[BOOST_FIND_HEADER([boost/bind.hpp])])
	491
	492
	493	# BOOST_CONVERSION()
	494	# ------------------
	495	# Look for Boost.Conversion (cast / lexical_cast)
	496	BOOST_DEFUN([Conversion],
	497	[BOOST_FIND_HEADER([boost/cast.hpp])
	498	BOOST_FIND_HEADER([boost/lexical_cast.hpp])
	499	])# BOOST_CONVERSION
	500
	501
	502	# BOOST_DATE_TIME([PREFERRED-RT-OPT])
	503	# -----------------------------------
	504	# Look for Boost.Date_Time. For the documentation of PREFERRED-RT-OPT, see the
	505	# documentation of BOOST_FIND_LIB above.
	506	BOOST_DEFUN([Date_Time],
	507	[BOOST_FIND_LIB([date_time], [$1],
	508	[boost/date_time/posix_time/posix_time.hpp],
	509	[boost::posix_time::ptime t;])
	510	])# BOOST_DATE_TIME
	511
	512
	513	# BOOST_EXCEPTION()
[f08ae7]	514	# ------------
[79de12]	515	# Look for Boost.Exception
	516	BOOST_DEFUN([Exception],
	517	[BOOST_FIND_HEADER([boost/exception/all.hpp])])
	518
	519
	520	# BOOST_FILESYSTEM([PREFERRED-RT-OPT])
	521	# ------------------------------------
	522	# Look for Boost.Filesystem. For the documentation of PREFERRED-RT-OPT, see
	523	# the documentation of BOOST_FIND_LIB above.
	524	# Do not check for boost/filesystem.hpp because this file was introduced in
	525	# 1.34.
	526	BOOST_DEFUN([Filesystem],
	527	[# Do we have to check for Boost.System? This link-time dependency was
	528	# added as of 1.35.0. If we have a version <1.35, we must not attempt to
	529	# find Boost.System as it didn't exist by then.
	530	if test $boost_major_version -ge 135; then
	531	BOOST_SYSTEM([$1])
	532	fi # end of the Boost.System check.
	533	boost_filesystem_save_LIBS=$LIBS
	534	boost_filesystem_save_LDFLAGS=$LDFLAGS
	535	m4_pattern_allow([^BOOST_SYSTEM_(LIBS\|LDFLAGS)$])dnl
	536	LIBS="$LIBS $BOOST_SYSTEM_LIBS"
	537	LDFLAGS="$LDFLAGS $BOOST_SYSTEM_LDFLAGS"
	538	BOOST_FIND_LIB([filesystem], [$1],
	539	[boost/filesystem/path.hpp], [boost::filesystem::path p;])
	540	if test $enable_static_boost = yes && test $boost_major_version -ge 135; then
	541	AC_SUBST([BOOST_FILESYSTEM_LIBS], ["$BOOST_FILESYSTEM_LIBS $BOOST_SYSTEM_LIBS"])
	542	fi
	543	LIBS=$boost_filesystem_save_LIBS
	544	LDFLAGS=$boost_filesystem_save_LDFLAGS
	545	])# BOOST_FILESYSTEM
	546
	547
	548	# BOOST_FOREACH()
	549	# ---------------
	550	# Look for Boost.Foreach
	551	BOOST_DEFUN([Foreach],
	552	[BOOST_FIND_HEADER([boost/foreach.hpp])])
	553
	554
	555	# BOOST_FORMAT()
	556	# --------------
	557	# Look for Boost.Format
	558	# Note: we can't check for boost/format/format_fwd.hpp because the header isn't
	559	# standalone. It can't be compiled because it triggers the following error:
	560	# boost/format/detail/config_macros.hpp:88: error: 'locale' in namespace 'std'
	561	# does not name a type
	562	BOOST_DEFUN([Format],
	563	[BOOST_FIND_HEADER([boost/format.hpp])])
	564
	565
	566	# BOOST_FUNCTION()
	567	# ----------------
	568	# Look for Boost.Function
	569	BOOST_DEFUN([Function],
	570	[BOOST_FIND_HEADER([boost/function.hpp])])
	571
	572
[619a0e]	573	# BOOST_FUSION()
	574	# ----------------
	575	# Look for Boost.Fusion
	576	BOOST_DEFUN([Fusion],
	577	[BOOST_FIND_HEADER([boost/fusion/sequence.hpp])])
	578
	579
[79de12]	580	# BOOST_GRAPH([PREFERRED-RT-OPT])
	581	# -------------------------------
	582	# Look for Boost.Graphs. For the documentation of PREFERRED-RT-OPT, see the
	583	# documentation of BOOST_FIND_LIB above.
	584	BOOST_DEFUN([Graph],
	585	[BOOST_FIND_LIB([graph], [$1],
	586	[boost/graph/adjacency_list.hpp], [boost::adjacency_list<> g;])
	587	])# BOOST_GRAPH
	588
	589
	590	# BOOST_IOSTREAMS([PREFERRED-RT-OPT])
	591	# -----------------------------------
	592	# Look for Boost.IOStreams. For the documentation of PREFERRED-RT-OPT, see the
	593	# documentation of BOOST_FIND_LIB above.
	594	BOOST_DEFUN([IOStreams],
	595	[BOOST_FIND_LIB([iostreams], [$1],
	596	[boost/iostreams/device/file_descriptor.hpp],
	597	[boost::iostreams::file_descriptor fd; fd.close();])
	598	])# BOOST_IOSTREAMS
	599
	600
	601	# BOOST_HASH()
	602	# ------------
	603	# Look for Boost.Functional/Hash
	604	BOOST_DEFUN([Hash],
	605	[BOOST_FIND_HEADER([boost/functional/hash.hpp])])
	606
	607
[f08ae7]	608	# BOOST_ITERATOR()
	609	# ------------
	610	# Look for Boost.Iterator
	611	BOOST_DEFUN([Iterator],
	612	[BOOST_FIND_HEADER([boost/iterator/iterator_adaptor.hpp])])
	613
	614
[79de12]	615	# BOOST_LAMBDA()
	616	# --------------
	617	# Look for Boost.Lambda
	618	BOOST_DEFUN([Lambda],
	619	[BOOST_FIND_HEADER([boost/lambda/lambda.hpp])])
	620
	621
[f08ae7]	622	# BOOST_LOG([PREFERRED-RT-OPT])
	623	# -----------------------------
	624	# Look for Boost.Log For the documentation of PREFERRED-RT-OPT, see the
	625	# documentation of BOOST_FIND_LIB above.
	626	BOOST_DEFUN([Log],
	627	[BOOST_FIND_LIB([log], [$1],
	628	[boost/log/core/core.hpp],
	629	[boost::log::attribute a; a.get_value();])
	630	])# BOOST_LOG
	631
	632
	633	# BOOST_LOG_SETUP([PREFERRED-RT-OPT])
	634	# -----------------------------------
	635	# Look for Boost.Log For the documentation of PREFERRED-RT-OPT, see the
	636	# documentation of BOOST_FIND_LIB above.
	637	BOOST_DEFUN([Log_Setup],
	638	[AC_REQUIRE([BOOST_LOG])dnl
	639	BOOST_FIND_LIB([log_setup], [$1],
	640	[boost/log/utility/init/from_settings.hpp],
	641	[boost::log::basic_settings<char> bs; bs.empty();])
	642	])# BOOST_LOG_SETUP
	643
	644
[79de12]	645	# BOOST_MATH()
	646	# ------------
	647	# Look for Boost.Math
	648	# TODO: This library isn't header-only but it comes in multiple different
	649	# flavors that don't play well with BOOST_FIND_LIB (e.g, libboost_math_c99,
	650	# libboost_math_c99f, libboost_math_c99l, libboost_math_tr1,
	651	# libboost_math_tr1f, libboost_math_tr1l). This macro must be fixed to do the
	652	# right thing anyway.
	653	BOOST_DEFUN([Math],
	654	[BOOST_FIND_HEADER([boost/math/special_functions.hpp])])
	655
	656
	657	# BOOST_MULTIARRAY()
	658	# ------------------
	659	# Look for Boost.MultiArray
	660	BOOST_DEFUN([MultiArray],
[619a0e]	661	[BOOST_FIND_HEADER([boost/mpl/list.hpp])])
[79de12]	662
	663
[619a0e]	664	# BOOST_MMPL()
	665	# ------------------
	666	# Look for Boost.MPL
	667	BOOST_DEFUN([MPL],
	668	[BOOST_FIND_HEADER([boost/mpl/for_each.hpp])])
	669
[79de12]	670	# BOOST_NUMERIC_CONVERSION()
	671	# --------------------------
	672	# Look for Boost.NumericConversion (policy-based numeric conversion)
	673	BOOST_DEFUN([Numeric_Conversion],
	674	[BOOST_FIND_HEADER([boost/numeric/conversion/converter.hpp])
	675	])# BOOST_NUMERIC_CONVERSION
	676
	677
	678	# BOOST_OPTIONAL()
	679	# ----------------
	680	# Look for Boost.Optional
	681	BOOST_DEFUN([Optional],
	682	[BOOST_FIND_HEADER([boost/optional.hpp])])
	683
	684
	685	# BOOST_PREPROCESSOR()
	686	# --------------------
	687	# Look for Boost.Preprocessor
	688	BOOST_DEFUN([Preprocessor],
	689	[BOOST_FIND_HEADER([boost/preprocessor/repeat.hpp])])
	690
	691
[613da6]	692	# BOOST_PROPERTY_TREE([PREFERRED-RT-OPT])
	693	# -----------------------------------------
	694	# Look for Boost.Property_Tree. For the documentation of PREFERRED-RT-OPT,
	695	# see the documentation of BOOST_FIND_LIB above.
	696	BOOST_DEFUN([Property_Tree],
	697	[BOOST_FIND_LIB([property_tree], [$1],
	698	[boost/property_tree/ptree.hpp],
	699	[boost::property_tree::ptree pt; boost::property_tree::read_xml d("test", pt);])
	700	])# BOOST_PROPERTY_TREE
	701
	702
[f08ae7]	703	# BOOST_RANDOM()
	704	# --------------------
	705	# Look for Boost.Random
	706	BOOST_DEFUN([Random],
	707	[BOOST_FIND_HEADER([boost/random/random_number_generator.hpp])])
	708
	709
	710	# BOOST_UNORDERED()
	711	# -----------------
	712	# Look for Boost.Unordered
	713	BOOST_DEFUN([Unordered],
	714	[BOOST_FIND_HEADER([boost/unordered_map.hpp])])
	715
	716
	717	# BOOST_UUID()
	718	# ------------
	719	# Look for Boost.Uuid
	720	BOOST_DEFUN([Uuid],
	721	[BOOST_FIND_HEADER([boost/uuid/uuid.hpp])])
	722
	723
[79de12]	724	# BOOST_PROGRAM_OPTIONS([PREFERRED-RT-OPT])
	725	# -----------------------------------------
	726	# Look for Boost.Program_options. For the documentation of PREFERRED-RT-OPT,
	727	# see the documentation of BOOST_FIND_LIB above.
	728	BOOST_DEFUN([Program_Options],
	729	[BOOST_FIND_LIB([program_options], [$1],
	730	[boost/program_options.hpp],
	731	[boost::program_options::options_description d("test");])
	732	])# BOOST_PROGRAM_OPTIONS
	733
	734
	735
	736	# _BOOST_PYTHON_CONFIG(VARIABLE, FLAG)
	737	# ------------------------------------
	738	# Save VARIABLE, and define it via `python-config --FLAG`.
	739	# Substitute BOOST_PYTHON_VARIABLE.
	740	m4_define([_BOOST_PYTHON_CONFIG],
	741	[AC_SUBST([BOOST_PYTHON_$1],
	742	[`python-config --$2 2>/dev/null`])dnl
	743	boost_python_save_$1=$$1
	744	$1="$$1 $BOOST_PYTHON_$1"])
	745
	746
	747	# BOOST_PYTHON([PREFERRED-RT-OPT])
	748	# --------------------------------
	749	# Look for Boost.Python. For the documentation of PREFERRED-RT-OPT,
	750	# see the documentation of BOOST_FIND_LIB above.
	751	BOOST_DEFUN([Python],
	752	[_BOOST_PYTHON_CONFIG([CPPFLAGS], [includes])
	753	_BOOST_PYTHON_CONFIG([LDFLAGS], [ldflags])
	754	_BOOST_PYTHON_CONFIG([LIBS], [libs])
	755	m4_pattern_allow([^BOOST_PYTHON_MODULE$])dnl
	756	BOOST_FIND_LIB([python], [$1],
	757	[boost/python.hpp],
	758	[], [BOOST_PYTHON_MODULE(empty) {}])
	759	CPPFLAGS=$boost_python_save_CPPFLAGS
	760	LDFLAGS=$boost_python_save_LDFLAGS
	761	LIBS=$boost_python_save_LIBS
	762	])# BOOST_PYTHON
	763
	764
	765	# BOOST_REF()
	766	# -----------
	767	# Look for Boost.Ref
	768	BOOST_DEFUN([Ref],
	769	[BOOST_FIND_HEADER([boost/ref.hpp])])
	770
	771
	772	# BOOST_REGEX([PREFERRED-RT-OPT])
	773	# -------------------------------
	774	# Look for Boost.Regex. For the documentation of PREFERRED-RT-OPT, see the
	775	# documentation of BOOST_FIND_LIB above.
	776	BOOST_DEFUN([Regex],
	777	[BOOST_FIND_LIB([regex], [$1],
	778	[boost/regex.hpp],
	779	[boost::regex exp("*"); boost::regex_match("foo", exp);])
	780	])# BOOST_REGEX
	781
	782
	783	# BOOST_SERIALIZATION([PREFERRED-RT-OPT])
	784	# ---------------------------------------
	785	# Look for Boost.Serialization. For the documentation of PREFERRED-RT-OPT, see
	786	# the documentation of BOOST_FIND_LIB above.
	787	BOOST_DEFUN([Serialization],
	788	[BOOST_FIND_LIB([serialization], [$1],
	789	[boost/archive/text_oarchive.hpp],
	790	[std::ostream* o = 0; // Cheap way to get an ostream...
	791	boost::archive::text_oarchive t(*o);])
[f08ae7]	792	])# BOOST_SERIALIZATION
[79de12]	793
	794
	795	# BOOST_SIGNALS([PREFERRED-RT-OPT])
	796	# ---------------------------------
	797	# Look for Boost.Signals. For the documentation of PREFERRED-RT-OPT, see the
	798	# documentation of BOOST_FIND_LIB above.
	799	BOOST_DEFUN([Signals],
	800	[BOOST_FIND_LIB([signals], [$1],
	801	[boost/signal.hpp],
	802	[boost::signal<void ()> s;])
	803	])# BOOST_SIGNALS
	804
	805
	806	# BOOST_SMART_PTR()
	807	# -----------------
	808	# Look for Boost.SmartPtr
	809	BOOST_DEFUN([Smart_Ptr],
	810	[BOOST_FIND_HEADER([boost/scoped_ptr.hpp])
	811	BOOST_FIND_HEADER([boost/shared_ptr.hpp])
	812	])
	813
	814
	815	# BOOST_STATICASSERT()
	816	# --------------------
	817	# Look for Boost.StaticAssert
	818	BOOST_DEFUN([StaticAssert],
	819	[BOOST_FIND_HEADER([boost/static_assert.hpp])])
	820
	821
	822	# BOOST_STRING_ALGO()
	823	# -------------------
	824	# Look for Boost.StringAlgo
	825	BOOST_DEFUN([String_Algo],
	826	[BOOST_FIND_HEADER([boost/algorithm/string.hpp])
	827	])
	828
	829
	830	# BOOST_SYSTEM([PREFERRED-RT-OPT])
	831	# --------------------------------
	832	# Look for Boost.System. For the documentation of PREFERRED-RT-OPT, see the
	833	# documentation of BOOST_FIND_LIB above. This library was introduced in Boost
	834	# 1.35.0.
	835	BOOST_DEFUN([System],
	836	[BOOST_FIND_LIB([system], [$1],
	837	[boost/system/error_code.hpp],
	838	[boost::system::error_code e; e.clear();])
	839	])# BOOST_SYSTEM
	840
	841
	842	# BOOST_TEST([PREFERRED-RT-OPT])
	843	# ------------------------------
	844	# Look for Boost.Test. For the documentation of PREFERRED-RT-OPT, see the
	845	# documentation of BOOST_FIND_LIB above.
	846	BOOST_DEFUN([Test],
	847	[m4_pattern_allow([^BOOST_CHECK$])dnl
	848	BOOST_FIND_LIB([unit_test_framework], [$1],
	849	[boost/test/unit_test.hpp], [BOOST_CHECK(2 == 2);],
	850	[using boost::unit_test::test_suite;
	851	test_suite* init_unit_test_suite(int argc, char ** argv)
	852	{ return NULL; }])
	853	])# BOOST_TEST
	854
	855
	856	# BOOST_THREADS([PREFERRED-RT-OPT])
	857	# ---------------------------------
	858	# Look for Boost.Thread. For the documentation of PREFERRED-RT-OPT, see the
	859	# documentation of BOOST_FIND_LIB above.
	860	# FIXME: Provide an alias "BOOST_THREAD".
	861	BOOST_DEFUN([Threads],
	862	[dnl Having the pthread flag is required at least on GCC3 where
	863	dnl boost/thread.hpp would complain if we try to compile without
	864	dnl -pthread on GNU/Linux.
	865	AC_REQUIRE([_BOOST_PTHREAD_FLAG])dnl
	866	boost_threads_save_LIBS=$LIBS
	867	boost_threads_save_CPPFLAGS=$CPPFLAGS
	868	LIBS="$LIBS $boost_cv_pthread_flag"
	869	# Yes, we need to put the -pthread thing in CPPFLAGS because with GCC3,
	870	# boost/thread.hpp will trigger a #error if -pthread isn't used:
	871	# boost/config/requires_threads.hpp:47:5: #error "Compiler threading support
	872	# is not turned on. Please set the correct command line options for
	873	# threading: -pthread (Linux), -pthreads (Solaris) or -mthreads (Mingw32)"
	874	CPPFLAGS="$CPPFLAGS $boost_cv_pthread_flag"
	875	BOOST_FIND_LIB([thread], [$1],
	876	[boost/thread.hpp], [boost::thread t; boost::mutex m;])
	877	BOOST_THREAD_LIBS="$BOOST_THREAD_LIBS $boost_cv_pthread_flag"
	878	BOOST_CPPFLAGS="$BOOST_CPPFLAGS $boost_cv_pthread_flag"
	879	LIBS=$boost_threads_save_LIBS
	880	CPPFLAGS=$boost_threads_save_CPPFLAGS
	881	])# BOOST_THREADS
	882
	883
	884	# BOOST_TOKENIZER()
	885	# -----------------
	886	# Look for Boost.Tokenizer
	887	BOOST_DEFUN([Tokenizer],
	888	[BOOST_FIND_HEADER([boost/tokenizer.hpp])])
	889
	890
	891	# BOOST_TRIBOOL()
	892	# ---------------
	893	# Look for Boost.Tribool
	894	BOOST_DEFUN([Tribool],
	895	[BOOST_FIND_HEADER([boost/logic/tribool_fwd.hpp])
	896	BOOST_FIND_HEADER([boost/logic/tribool.hpp])
	897	])
	898
	899
	900	# BOOST_TUPLE()
	901	# -------------
	902	# Look for Boost.Tuple
	903	BOOST_DEFUN([Tuple],
	904	[BOOST_FIND_HEADER([boost/tuple/tuple.hpp])])
	905
	906
	907	# BOOST_TYPETRAITS()
	908	# --------------------
	909	# Look for Boost.TypeTraits
	910	BOOST_DEFUN([TypeTraits],
	911	[BOOST_FIND_HEADER([boost/type_traits.hpp])])
	912
	913
	914	# BOOST_UTILITY()
	915	# ---------------
	916	# Look for Boost.Utility (noncopyable, result_of, base-from-member idiom,
	917	# etc.)
	918	BOOST_DEFUN([Utility],
	919	[BOOST_FIND_HEADER([boost/utility.hpp])])
	920
	921
	922	# BOOST_VARIANT()
	923	# ---------------
	924	# Look for Boost.Variant.
	925	BOOST_DEFUN([Variant],
	926	[BOOST_FIND_HEADER([boost/variant/variant_fwd.hpp])
	927	BOOST_FIND_HEADER([boost/variant.hpp])])
	928
	929
	930	# BOOST_WAVE([PREFERRED-RT-OPT])
	931	# ------------------------------
	932	# NOTE: If you intend to use Wave/Spirit with thread support, make sure you
	933	# call BOOST_THREADS first.
	934	# Look for Boost.Wave. For the documentation of PREFERRED-RT-OPT, see the
	935	# documentation of BOOST_FIND_LIB above.
	936	BOOST_DEFUN([Wave],
	937	[AC_REQUIRE([BOOST_FILESYSTEM])dnl
	938	AC_REQUIRE([BOOST_DATE_TIME])dnl
	939	boost_wave_save_LIBS=$LIBS
	940	boost_wave_save_LDFLAGS=$LDFLAGS
	941	m4_pattern_allow([^BOOST_((FILE)?SYSTEM\|DATE_TIME\|THREAD)_(LIBS\|LDFLAGS)$])dnl
	942	LIBS="$LIBS $BOOST_SYSTEM_LIBS $BOOST_FILESYSTEM_LIBS $BOOST_DATE_TIME_LIBS\
	943	$BOOST_THREAD_LIBS"
	944	LDFLAGS="$LDFLAGS $BOOST_SYSTEM_LDFLAGS $BOOST_FILESYSTEM_LDFLAGS\
	945	$BOOST_DATE_TIME_LDFLAGS $BOOST_THREAD_LDFLAGS"
	946	BOOST_FIND_LIB([wave], [$1],
	947	[boost/wave.hpp],
	948	[boost::wave::token_id id; get_token_name(id);])
	949	LIBS=$boost_wave_save_LIBS
	950	LDFLAGS=$boost_wave_save_LDFLAGS
	951	])# BOOST_WAVE
	952
	953
	954	# BOOST_XPRESSIVE()
	955	# -----------------
	956	# Look for Boost.Xpressive (new since 1.36.0).
	957	BOOST_DEFUN([Xpressive],
	958	[BOOST_FIND_HEADER([boost/xpressive/xpressive.hpp])])
	959
	960
	961	# ----------------- #
	962	# Internal helpers. #
	963	# ----------------- #
	964
	965
	966	# _BOOST_PTHREAD_FLAG()
	967	# ---------------------
	968	# Internal helper for BOOST_THREADS. Based on ACX_PTHREAD:
	969	# http://autoconf-archive.cryp.to/acx_pthread.html
	970	AC_DEFUN([_BOOST_PTHREAD_FLAG],
	971	[AC_REQUIRE([AC_PROG_CXX])dnl
	972	AC_REQUIRE([AC_CANONICAL_HOST])dnl
	973	AC_LANG_PUSH([C++])dnl
	974	AC_CACHE_CHECK([for the flags needed to use pthreads], [boost_cv_pthread_flag],
	975	[ boost_cv_pthread_flag=
	976	# The ordering is (sometimes) important. Some notes on the
	977	# individual items follow:
	978	# (none): in case threads are in libc; should be tried before -Kthread and
	979	# other compiler flags to prevent continual compiler warnings
	980	# -lpthreads: AIX (must check this before -lpthread)
	981	# -Kthread: Sequent (threads in libc, but -Kthread needed for pthread.h)
	982	# -kthread: FreeBSD kernel threads (preferred to -pthread since SMP-able)
	983	# -llthread: LinuxThreads port on FreeBSD (also preferred to -pthread)
	984	# -pthread: GNU Linux/GCC (kernel threads), BSD/GCC (userland threads)
	985	# -pthreads: Solaris/GCC
	986	# -mthreads: MinGW32/GCC, Lynx/GCC
	987	# -mt: Sun Workshop C (may only link SunOS threads [-lthread], but it
	988	# doesn't hurt to check since this sometimes defines pthreads too;
	989	# also defines -D_REENTRANT)
	990	# ... -mt is also the pthreads flag for HP/aCC
	991	# -lpthread: GNU Linux, etc.
	992	# --thread-safe: KAI C++
	993	case $host_os in #(
	994	solaris)
	995	# On Solaris (at least, for some versions), libc contains stubbed
	996	# (non-functional) versions of the pthreads routines, so link-based
	997	# tests will erroneously succeed. (We need to link with -pthreads/-mt/
	998	# -lpthread.) (The stubs are missing pthread_cleanup_push, or rather
	999	# a function called by this macro, so we could check for that, but
	1000	# who knows whether they'll stub that too in a future libc.) So,
	1001	# we'll just look for -pthreads and -lpthread first:
	1002	boost_pthread_flags="-pthreads -lpthread -mt -pthread";; #(
	1003	*)
	1004	boost_pthread_flags="-lpthreads -Kthread -kthread -llthread -pthread \
	1005	-pthreads -mthreads -lpthread --thread-safe -mt";;
	1006	esac
	1007	# Generate the test file.
	1008	AC_LANG_CONFTEST([AC_LANG_PROGRAM([#include <pthread.h>],
	1009	[pthread_t th; pthread_join(th, 0);
	1010	pthread_attr_init(0); pthread_cleanup_push(0, 0);
	1011	pthread_create(0,0,0,0); pthread_cleanup_pop(0);])])
	1012	for boost_pthread_flag in '' $boost_pthread_flags; do
	1013	boost_pthread_ok=false
	1014	dnl Re-use the test file already generated.
	1015	boost_pthreads__save_LIBS=$LIBS
	1016	LIBS="$LIBS $boost_pthread_flag"
	1017	AC_LINK_IFELSE([],
	1018	[if grep ".*$boost_pthread_flag" conftest.err; then
	1019	echo "This flag seems to have triggered warnings" >&AS_MESSAGE_LOG_FD
	1020	else
	1021	boost_pthread_ok=:; boost_cv_pthread_flag=$boost_pthread_flag
	1022	fi])
	1023	LIBS=$boost_pthreads__save_LIBS
	1024	$boost_pthread_ok && break
	1025	done
	1026	])
	1027	AC_LANG_POP([C++])dnl
	1028	])# _BOOST_PTHREAD_FLAG
	1029
	1030
	1031	# _BOOST_gcc_test(MAJOR, MINOR)
	1032	# -----------------------------
	1033	# Internal helper for _BOOST_FIND_COMPILER_TAG.
	1034	m4_define([_BOOST_gcc_test],
	1035	["defined __GNUC__ && __GNUC__ == $1 && __GNUC_MINOR__ == $2 && !defined __ICC @ gcc$1$2"])dnl
	1036
	1037
	1038	# _BOOST_FIND_COMPILER_TAG()
	1039	# --------------------------
	1040	# Internal. When Boost is installed without --layout=system, each library
	1041	# filename will hold a suffix that encodes the compiler used during the
	1042	# build. The Boost build system seems to call this a `tag'.
	1043	AC_DEFUN([_BOOST_FIND_COMPILER_TAG],
	1044	[AC_REQUIRE([AC_PROG_CXX])dnl
	1045	AC_REQUIRE([AC_CANONICAL_HOST])dnl
	1046	AC_CACHE_CHECK([for the toolset name used by Boost for $CXX], [boost_cv_lib_tag],
	1047	[boost_cv_lib_tag=unknown
	1048	if test x$boost_cv_inc_path != xno; then
	1049	AC_LANG_PUSH([C++])dnl
	1050	# The following tests are mostly inspired by boost/config/auto_link.hpp
	1051	# The list is sorted to most recent/common to oldest compiler (in order
	1052	# to increase the likelihood of finding the right compiler with the
	1053	# least number of compilation attempt).
	1054	# Beware that some tests are sensible to the order (for instance, we must
	1055	# look for MinGW before looking for GCC3).
	1056	# I used one compilation test per compiler with a #error to recognize
	1057	# each compiler so that it works even when cross-compiling (let me know
	1058	# if you know a better approach).
	1059	# Known missing tags (known from Boost's tools/build/v2/tools/common.jam):
	1060	# como, edg, kcc, bck, mp, sw, tru, xlc
	1061	# I'm not sure about my test for `il' (be careful: Intel's ICC pre-defines
	1062	# the same defines as GCC's).
	1063	for i in \
	1064	_BOOST_gcc_test(4, 6) \
	1065	_BOOST_gcc_test(4, 5) \
	1066	_BOOST_gcc_test(4, 4) \
	1067	_BOOST_gcc_test(4, 3) \
	1068	_BOOST_gcc_test(4, 2) \
	1069	_BOOST_gcc_test(4, 1) \
	1070	_BOOST_gcc_test(4, 0) \
	1071	"defined __GNUC__ && __GNUC__ == 3 && !defined __ICC \
	1072	&& (defined WIN32 \|\| defined WINNT \|\| defined _WIN32 \|\| defined __WIN32 \
	1073	\|\| defined __WIN32__ \|\| defined __WINNT \|\| defined __WINNT__) @ mgw" \
	1074	_BOOST_gcc_test(3, 4) \
	1075	_BOOST_gcc_test(3, 3) \
	1076	"defined _MSC_VER && _MSC_VER >= 1500 @ vc90" \
	1077	"defined _MSC_VER && _MSC_VER == 1400 @ vc80" \
	1078	_BOOST_gcc_test(3, 2) \
	1079	"defined _MSC_VER && _MSC_VER == 1310 @ vc71" \
	1080	_BOOST_gcc_test(3, 1) \
	1081	_BOOST_gcc_test(3, 0) \
	1082	"defined __BORLANDC__ @ bcb" \
	1083	"defined __ICC && (defined __unix \|\| defined __unix__) @ il" \
	1084	"defined __ICL @ iw" \
	1085	"defined _MSC_VER && _MSC_VER == 1300 @ vc7" \
	1086	_BOOST_gcc_test(2, 95) \
	1087	"defined __MWERKS__ && __MWERKS__ <= 0x32FF @ cw9" \
	1088	"defined _MSC_VER && _MSC_VER < 1300 && !defined UNDER_CE @ vc6" \
	1089	"defined _MSC_VER && _MSC_VER < 1300 && defined UNDER_CE @ evc4" \
	1090	"defined __MWERKS__ && __MWERKS__ <= 0x31FF @ cw8"
	1091	do
	1092	boost_tag_test=`expr "X$i" : 'X$[[^@]]*$ @ '`
	1093	boost_tag=`expr "X$i" : 'X[[^@]]* @ $.*$'`
	1094	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
	1095	#if $boost_tag_test
	1096	/* OK */
	1097	#else
	1098	# error $boost_tag_test
	1099	#endif
	1100	]])], [boost_cv_lib_tag=$boost_tag; break], [])
	1101	done
	1102	AC_LANG_POP([C++])dnl
	1103	case $boost_cv_lib_tag in #(
	1104	# Some newer (>= 1.35?) versions of Boost seem to only use "gcc" as opposed
	1105	# to "gcc41" for instance.
	1106	-gcc \| '-gcc ') :;; #( Don't re-add -gcc: it's already in there.
	1107	gcc*)
	1108	boost_tag_x=
	1109	case $host_os in #(
	1110	darwin*)
	1111	if test $boost_major_version -ge 136; then
	1112	# The `x' added in r46793 of Boost.
	1113	boost_tag_x=x
	1114	fi;;
	1115	esac
	1116	# We can specify multiple tags in this variable because it's used by
	1117	# BOOST_FIND_LIB that does a `for tag in -$boost_cv_lib_tag' ...
	1118	boost_cv_lib_tag="$boost_tag_x$boost_cv_lib_tag -${boost_tag_x}gcc"
	1119	;; #(
	1120	unknown)
	1121	AC_MSG_WARN([[could not figure out which toolset name to use for $CXX]])
	1122	boost_cv_lib_tag=
	1123	;;
	1124	esac
	1125	fi])dnl end of AC_CACHE_CHECK
	1126	])# _BOOST_FIND_COMPILER_TAG
	1127
	1128
	1129	# _BOOST_GUESS_WHETHER_TO_USE_MT()
	1130	# --------------------------------
	1131	# Compile a small test to try to guess whether we should favor MT (Multi
	1132	# Thread) flavors of Boost. Sets boost_guess_use_mt accordingly.
	1133	AC_DEFUN([_BOOST_GUESS_WHETHER_TO_USE_MT],
	1134	[# Check whether we do better use `mt' even though we weren't ask to.
	1135	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
	1136	#if defined _REENTRANT \|\| defined _MT \|\| defined __MT__
	1137	/* use -mt */
	1138	#else
	1139	# error MT not needed
	1140	#endif
	1141	]])], [boost_guess_use_mt=:], [boost_guess_use_mt=false])
	1142	])
	1143
	1144	# _BOOST_AC_LINK_IFELSE(PROGRAM, [ACTION-IF-TRUE], [ACTION-IF-FALSE])
	1145	# -------------------------------------------------------------------
	1146	# Fork of _AC_LINK_IFELSE that preserves conftest.o across calls. Fragile,
	1147	# will break when Autoconf changes its internals. Requires that you manually
	1148	# rm -f conftest.$ac_objext in between to really different tests, otherwise
	1149	# you will try to link a conftest.o left behind by a previous test.
	1150	# Used to aggressively optimize BOOST_FIND_LIB (see the big comment in this
	1151	# macro).
	1152	#
	1153	# Don't use "break" in the actions, as it would short-circuit some code
	1154	# this macro runs after the actions.
	1155	m4_define([_BOOST_AC_LINK_IFELSE],
	1156	[m4_ifvaln([$1], [AC_LANG_CONFTEST([$1])])dnl
	1157	rm -f conftest$ac_exeext
	1158	boost_save_ac_ext=$ac_ext
	1159	boost_use_source=:
	1160	# If we already have a .o, re-use it. We change $ac_ext so that $ac_link
	1161	# tries to link the existing object file instead of compiling from source.
	1162	test -f conftest.$ac_objext && ac_ext=$ac_objext && boost_use_source=false &&
	1163	_AS_ECHO_LOG([re-using the existing conftest.$ac_objext])
	1164	AS_IF([_AC_DO_STDERR($ac_link) && {
	1165	test -z "$ac_[]_AC_LANG_ABBREV[]_werror_flag" \|\|
	1166	test ! -s conftest.err
	1167	} && test -s conftest$ac_exeext && {
	1168	test "$cross_compiling" = yes \|\|
	1169	$as_executable_p conftest$ac_exeext
	1170	dnl FIXME: use AS_TEST_X instead when 2.61 is widespread enough.
	1171	}],
	1172	[$2],
	1173	[if $boost_use_source; then
	1174	_AC_MSG_LOG_CONFTEST
	1175	fi
	1176	$3])
	1177	ac_objext=$boost_save_ac_objext
	1178	ac_ext=$boost_save_ac_ext
	1179	dnl Delete also the IPA/IPO (Inter Procedural Analysis/Optimization)
	1180	dnl information created by the PGI compiler (conftest_ipa8_conftest.oo),
	1181	dnl as it would interfere with the next link command.
	1182	rm -f core conftest.err conftest_ipa8_conftest.oo \
	1183	conftest$ac_exeext m4_ifval([$1], [conftest.$ac_ext])[]dnl
	1184	])# _BOOST_AC_LINK_IFELSE
	1185
	1186	# Local Variables:
	1187	# mode: autoconf
	1188	# End:

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