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+# ===========================================================================
+# https://www.gnu.org/software/autoconf-archive/ax_boost_thread.html
+# ===========================================================================
+#
+# SYNOPSIS
+#
+# AX_BOOST_THREAD
+#
+# DESCRIPTION
+#
+# Test for Thread 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_THREAD_LIB)
+#
+# And sets:
+#
+# HAVE_BOOST_THREAD
+#
+# LICENSE
+#
+# Copyright (c) 2009 Thomas Porschberg <thomas@randspringer.de>
+# Copyright (c) 2009 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 30
+
+AC_DEFUN([AX_BOOST_THREAD],
+[
+ AC_ARG_WITH([boost-thread],
+ AS_HELP_STRING([--with-boost-thread@<:@=special-lib@:>@],
+ [use the Thread library from boost -
+ it is possible to specify a certain library for the linker
+ e.g. --with-boost-thread=boost_thread-gcc-mt ]),
+ [
+ if test "$withval" = "yes"; then
+ want_boost="yes"
+ ax_boost_user_thread_lib=""
+ else
+ want_boost="yes"
+ ax_boost_user_thread_lib="$withval"
+ fi
+ ],
+ [want_boost="yes"]
+ )
+
+ if test "x$want_boost" = "xyes"; then
+ AC_REQUIRE([AC_PROG_CC])
+ AC_REQUIRE([AC_CANONICAL_BUILD])
+ CPPFLAGS_SAVED="$CPPFLAGS"
+ CPPFLAGS="$CPPFLAGS $BOOST_CPPFLAGS"
+ export CPPFLAGS
+
+ LDFLAGS_SAVED="$LDFLAGS"
+ LDFLAGS="$LDFLAGS $BOOST_LDFLAGS"
+ export LDFLAGS
+
+ AC_CACHE_CHECK(whether the Boost::Thread library is available,
+ ax_cv_boost_thread,
+ [AC_LANG_PUSH([C++])
+ CXXFLAGS_SAVE=$CXXFLAGS
+
+ if test "x$host_os" = "xsolaris" ; then
+ CXXFLAGS="-pthreads $CXXFLAGS"
+ elif test "x$host_os" = "xmingw32" ; then
+ CXXFLAGS="-mthreads $CXXFLAGS"
+ else
+ CXXFLAGS="-pthread $CXXFLAGS"
+ fi
+ AC_COMPILE_IFELSE([
+ AC_LANG_PROGRAM(
+ [[@%:@include <boost/thread/thread.hpp>]],
+ [[boost::thread_group thrds;
+ return 0;]])],
+ ax_cv_boost_thread=yes, ax_cv_boost_thread=no)
+ CXXFLAGS=$CXXFLAGS_SAVE
+ AC_LANG_POP([C++])
+ ])
+ if test "x$ax_cv_boost_thread" = "xyes"; then
+ if test "x$host_os" = "xsolaris" ; then
+ BOOST_CPPFLAGS="-pthreads $BOOST_CPPFLAGS"
+ elif test "x$host_os" = "xmingw32" ; then
+ BOOST_CPPFLAGS="-mthreads $BOOST_CPPFLAGS"
+ else
+ BOOST_CPPFLAGS="-pthread $BOOST_CPPFLAGS"
+ fi
+
+ AC_SUBST(BOOST_CPPFLAGS)
+
+ AC_DEFINE(HAVE_BOOST_THREAD,,
+ [define if the Boost::Thread library is available])
+ BOOSTLIBDIR=`echo $BOOST_LDFLAGS | sed -e 's/@<:@^\/@:>@*//'`
+
+ LDFLAGS_SAVE=$LDFLAGS
+ case "x$host_os" in
+ *bsd* )
+ LDFLAGS="-pthread $LDFLAGS"
+ break;
+ ;;
+ esac
+ if test "x$ax_boost_user_thread_lib" = "x"; then
+ for libextension in `ls -r $BOOSTLIBDIR/libboost_thread* 2>/dev/null | sed 's,.*/lib,,' | sed 's,\..*,,'`; do
+ ax_lib=${libextension}
+ AC_CHECK_LIB($ax_lib, exit,
+ [link_thread="yes"; break],
+ [link_thread="no"])
+ done
+ if test "x$link_thread" != "xyes"; then
+ for libextension in `ls -r $BOOSTLIBDIR/boost_thread* 2>/dev/null | sed 's,.*/,,' | sed 's,\..*,,'`; do
+ ax_lib=${libextension}
+ AC_CHECK_LIB($ax_lib, exit,
+ [link_thread="yes"; break],
+ [link_thread="no"])
+ done
+ fi
+
+ else
+ for ax_lib in $ax_boost_user_thread_lib boost_thread-$ax_boost_user_thread_lib; do
+ AC_CHECK_LIB($ax_lib, exit,
+ [link_thread="yes"; break],
+ [link_thread="no"])
+ done
+
+ fi
+ if test "x$ax_lib" = "x"; then
+ AC_MSG_ERROR(Could not find a version of the library!)
+ fi
+ if test "x$link_thread" = "xno"; then
+ AC_MSG_ERROR(Could not link against $ax_lib !)
+ else
+ BOOST_THREAD_LIB="-l$ax_lib"
+ case "x$host_os" in
+ *bsd* )
+ BOOST_LDFLAGS="-pthread $BOOST_LDFLAGS"
+ break;
+ ;;
+ solaris )
+ BOOST_THREAD_LIB="$BOOST_THREAD_LIB -lpthread"
+ break;
+ ;;
+ mingw32 )
+ break;
+ ;;
+ * )
+ BOOST_THREAD_LIB="$BOOST_THREAD_LIB -lpthread"
+ break;
+ ;;
+ esac
+ AC_SUBST(BOOST_THREAD_LIB)
+ fi
+ fi
+
+ CPPFLAGS="$CPPFLAGS_SAVED"
+ LDFLAGS="$LDFLAGS_SAVED"
+ fi
+])