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+# ===========================================================================
+# https://www.gnu.org/software/autoconf-archive/ax_boost_regex.html
+# ===========================================================================
+#
+# SYNOPSIS
+#
+# AX_BOOST_REGEX
+#
+# DESCRIPTION
+#
+# Test for Regex library from the Boost C++ libraries. The macro requires
+# a preceding call to AX_BOOST_BASE. Further documentation is available at
+# <http://randspringer.de/boost/index.html>.
+#
+# This macro calls:
+#
+# AC_SUBST(BOOST_REGEX_LIB)
+#
+# And sets:
+#
+# HAVE_BOOST_REGEX
+#
+# LICENSE
+#
+# Copyright (c) 2008 Thomas Porschberg <thomas@randspringer.de>
+# Copyright (c) 2008 Michael Tindal
+#
+# Copying and distribution of this file, with or without modification, are
+# permitted in any medium without royalty provided the copyright notice
+# and this notice are preserved. This file is offered as-is, without any
+# warranty.
+
+#serial 23
+
+AC_DEFUN([AX_BOOST_REGEX],
+[
+ AC_ARG_WITH([boost-regex],
+ AS_HELP_STRING([--with-boost-regex@<:@=special-lib@:>@],
+ [use the Regex library from boost - it is possible to specify a certain library for the linker
+ e.g. --with-boost-regex=boost_regex-gcc-mt-d-1_33_1 ]),
+ [
+ if test "$withval" = "no"; then
+ want_boost="no"
+ elif test "$withval" = "yes"; then
+ want_boost="yes"
+ ax_boost_user_regex_lib=""
+ else
+ want_boost="yes"
+ ax_boost_user_regex_lib="$withval"
+ fi
+ ],
+ [want_boost="yes"]
+ )
+
+ if test "x$want_boost" = "xyes"; then
+ AC_REQUIRE([AC_PROG_CC])
+ CPPFLAGS_SAVED="$CPPFLAGS"
+ CPPFLAGS="$CPPFLAGS $BOOST_CPPFLAGS"
+ export CPPFLAGS
+
+ LDFLAGS_SAVED="$LDFLAGS"
+ LDFLAGS="$LDFLAGS $BOOST_LDFLAGS"
+ export LDFLAGS
+
+ AC_CACHE_CHECK(whether the Boost::Regex library is available,
+ ax_cv_boost_regex,
+ [AC_LANG_PUSH([C++])
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[@%:@include <boost/regex.hpp>
+ ]],
+ [[boost::regex r(); return 0;]])],
+ ax_cv_boost_regex=yes, ax_cv_boost_regex=no)
+ AC_LANG_POP([C++])
+ ])
+ if test "x$ax_cv_boost_regex" = "xyes"; then
+ AC_DEFINE(HAVE_BOOST_REGEX,,[define if the Boost::Regex library is available])
+ BOOSTLIBDIR=`echo $BOOST_LDFLAGS | sed -e 's/@<:@^\/@:>@*//'`
+ if test "x$ax_boost_user_regex_lib" = "x"; then
+ for libextension in `ls $BOOSTLIBDIR/libboost_regex*.so* $BOOSTLIBDIR/libboost_regex*.dylib* $BOOSTLIBDIR/libboost_regex*.a* 2>/dev/null | sed 's,.*/,,' | sed -e 's;^lib\(boost_regex.*\)\.so.*$;\1;' -e 's;^lib\(boost_regex.*\)\.dylib.*;\1;' -e 's;^lib\(boost_regex.*\)\.a.*$;\1;'` ; do
+ ax_lib=${libextension}
+ AC_CHECK_LIB($ax_lib, exit,
+ [BOOST_REGEX_LIB="-l$ax_lib"; AC_SUBST(BOOST_REGEX_LIB) link_regex="yes"; break],
+ [link_regex="no"])
+ done
+ if test "x$link_regex" != "xyes"; then
+ for libextension in `ls $BOOSTLIBDIR/boost_regex*.dll* $BOOSTLIBDIR/boost_regex*.a* 2>/dev/null | sed 's,.*/,,' | sed -e 's;^\(boost_regex.*\)\.dll.*$;\1;' -e 's;^\(boost_regex.*\)\.a.*$;\1;'` ; do
+ ax_lib=${libextension}
+ AC_CHECK_LIB($ax_lib, exit,
+ [BOOST_REGEX_LIB="-l$ax_lib"; AC_SUBST(BOOST_REGEX_LIB) link_regex="yes"; break],
+ [link_regex="no"])
+ done
+ fi
+
+ else
+ for ax_lib in $ax_boost_user_regex_lib boost_regex-$ax_boost_user_regex_lib; do
+ AC_CHECK_LIB($ax_lib, main,
+ [BOOST_REGEX_LIB="-l$ax_lib"; AC_SUBST(BOOST_REGEX_LIB) link_regex="yes"; break],
+ [link_regex="no"])
+ done
+ fi
+ if test "x$ax_lib" = "x"; then
+ AC_MSG_ERROR(Could not find a version of the Boost::Regex library!)
+ fi
+ if test "x$link_regex" != "xyes"; then
+ AC_MSG_ERROR(Could not link against $ax_lib !)
+ fi
+ fi
+
+ CPPFLAGS="$CPPFLAGS_SAVED"
+ LDFLAGS="$LDFLAGS_SAVED"
+ fi
+])