1# ===========================================================================
2#     https://www.gnu.org/software/autoconf-archive/ax_boost_system.html
3# ===========================================================================
4#
5# SYNOPSIS
6#
7#   AX_BOOST_SYSTEM
8#
9# DESCRIPTION
10#
11#   Test for System library from the Boost C++ libraries. The macro requires
12#   a preceding call to AX_BOOST_BASE. Further documentation is available at
13#   <http://randspringer.de/boost/index.html>.
14#
15#   This macro calls:
16#
17#     AC_SUBST(BOOST_SYSTEM_LIB)
18#
19#   And sets:
20#
21#     HAVE_BOOST_SYSTEM
22#
23# LICENSE
24#
25#   Copyright (c) 2008 Thomas Porschberg <thomas@randspringer.de>
26#   Copyright (c) 2008 Michael Tindal
27#   Copyright (c) 2008 Daniel Casimiro <dan.casimiro@gmail.com>
28#
29#   Copying and distribution of this file, with or without modification, are
30#   permitted in any medium without royalty provided the copyright notice
31#   and this notice are preserved. This file is offered as-is, without any
32#   warranty.
33
34#serial 20
35
36AC_DEFUN([AX_BOOST_SYSTEM],
37[
38	AC_ARG_WITH([boost-system],
39	AS_HELP_STRING([--with-boost-system@<:@=special-lib@:>@],
40                   [use the System library from boost - it is possible to specify a certain library for the linker
41                        e.g. --with-boost-system=boost_system-gcc-mt ]),
42        [
43        if test "$withval" = "no"; then
44			want_boost="no"
45        elif test "$withval" = "yes"; then
46            want_boost="yes"
47            ax_boost_user_system_lib=""
48        else
49		    want_boost="yes"
50		ax_boost_user_system_lib="$withval"
51		fi
52        ],
53        [want_boost="yes"]
54	)
55
56	if test "x$want_boost" = "xyes"; then
57        AC_REQUIRE([AC_PROG_CC])
58        AC_REQUIRE([AC_CANONICAL_BUILD])
59		CPPFLAGS_SAVED="$CPPFLAGS"
60		CPPFLAGS="$CPPFLAGS $BOOST_CPPFLAGS"
61		export CPPFLAGS
62
63		LDFLAGS_SAVED="$LDFLAGS"
64		LDFLAGS="$LDFLAGS $BOOST_LDFLAGS"
65		export LDFLAGS
66
67        AC_CACHE_CHECK(whether the Boost::System library is available,
68					   ax_cv_boost_system,
69        [AC_LANG_PUSH([C++])
70			 CXXFLAGS_SAVE=$CXXFLAGS
71			 CXXFLAGS=
72
73			 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[@%:@include <boost/system/error_code.hpp>]],
74				    [[boost::system::error_category *a = 0;]])],
75                   ax_cv_boost_system=yes, ax_cv_boost_system=no)
76			 CXXFLAGS=$CXXFLAGS_SAVE
77             AC_LANG_POP([C++])
78		])
79		if test "x$ax_cv_boost_system" = "xyes"; then
80			AC_SUBST(BOOST_CPPFLAGS)
81
82			AC_DEFINE(HAVE_BOOST_SYSTEM,,[define if the Boost::System library is available])
83            BOOSTLIBDIR=`echo $BOOST_LDFLAGS | sed -e 's/@<:@^\/@:>@*//'`
84
85			LDFLAGS_SAVE=$LDFLAGS
86            if test "x$ax_boost_user_system_lib" = "x"; then
87                for libextension in `ls -r $BOOSTLIBDIR/libboost_system* 2>/dev/null | sed 's,.*/lib,,' | sed 's,\..*,,'` ; do
88                     ax_lib=${libextension}
89				    AC_CHECK_LIB($ax_lib, exit,
90                                 [BOOST_SYSTEM_LIB="-l$ax_lib"; AC_SUBST(BOOST_SYSTEM_LIB) link_system="yes"; break],
91                                 [link_system="no"])
92				done
93                if test "x$link_system" != "xyes"; then
94                for libextension in `ls -r $BOOSTLIBDIR/boost_system* 2>/dev/null | sed 's,.*/,,' | sed -e 's,\..*,,'` ; do
95                     ax_lib=${libextension}
96				    AC_CHECK_LIB($ax_lib, exit,
97                                 [BOOST_SYSTEM_LIB="-l$ax_lib"; AC_SUBST(BOOST_SYSTEM_LIB) link_system="yes"; break],
98                                 [link_system="no"])
99				done
100                fi
101
102            else
103               for ax_lib in $ax_boost_user_system_lib boost_system-$ax_boost_user_system_lib; do
104				      AC_CHECK_LIB($ax_lib, exit,
105                                   [BOOST_SYSTEM_LIB="-l$ax_lib"; AC_SUBST(BOOST_SYSTEM_LIB) link_system="yes"; break],
106                                   [link_system="no"])
107                  done
108
109            fi
110            if test "x$ax_lib" = "x"; then
111                AC_MSG_ERROR(Could not find a version of the Boost::System library!)
112            fi
113			if test "x$link_system" = "xno"; then
114				AC_MSG_ERROR(Could not link against $ax_lib !)
115			fi
116		fi
117
118		CPPFLAGS="$CPPFLAGS_SAVED"
119	LDFLAGS="$LDFLAGS_SAVED"
120	fi
121])
122