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+# ===========================================================================
+# http://www.gnu.org/software/autoconf-archive/ax_boost_chrono.html
+# ===========================================================================
+#
+# SYNOPSIS
+#
+# AX_BOOST_CHRONO
+#
+# DESCRIPTION
+#
+# Test for System 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_CHRONO_LIB)
+#
+# And sets:
+#
+# HAVE_BOOST_CHRONO
+#
+# LICENSE
+#
+# Copyright (c) 2012 Xiyue Deng <manphiz@gmail.com>
+#
+# 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 1
+
+AC_DEFUN([AX_BOOST_CHRONO],
+[
+ AC_ARG_WITH([boost-chrono],
+ AS_HELP_STRING([--with-boost-chrono@<:@=special-lib@:>@],
+ [use the Chrono library from boost - it is possible to specify a certain library for the linker
+ e.g. --with-boost-chrono=boost_chrono-gcc-mt ]),
+ [
+ if test "$withval" = "no"; then
+ want_boost="no"
+ elif test "$withval" = "yes"; then
+ want_boost="yes"
+ ax_boost_user_chrono_lib=""
+ else
+ want_boost="yes"
+ ax_boost_user_chrono_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 $BOOST_LDFLAGS"
+ export LDFLAGS
+
+ AC_CACHE_CHECK(whether the Boost::Chrono library is available,
+ ax_cv_boost_chrono,
+ [AC_LANG_PUSH([C++])
+ CXXFLAGS_SAVE=$CXXFLAGS
+
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[@%:@include <boost/chrono.hpp>]],
+ [[boost::chrono::system_clock::time_point time;]])],
+ ax_cv_boost_chrono=yes, ax_cv_boost_chrono=no)
+ CXXFLAGS=$CXXFLAGS_SAVE
+ AC_LANG_POP([C++])
+ ])
+ if test "x$ax_cv_boost_chrono" = "xyes"; then
+ AC_SUBST(BOOST_CPPFLAGS)
+
+ AC_DEFINE(HAVE_BOOST_CHRONO,,[define if the Boost::Chrono library is available])
+ BOOSTLIBDIR=`echo $BOOST_LDFLAGS | sed -e 's/@<:@^\/@:>@*//'`
+
+ LDFLAGS_SAVE=$LDFLAGS
+ if test "x$ax_boost_user_chrono_lib" = "x"; then
+ ax_lib=
+ for libextension in `ls $BOOSTLIBDIR/libboost_chrono*.so* $BOOSTLIBDIR/libboost_chrono*.dylib* $BOOSTLIBDIR/libboost_chrono*.a* 2>/dev/null | sed 's,.*/,,' | sed -e 's;^lib\(boost_chrono.*\)\.so.*$;\1;' -e 's;^lib\(boost_chrono.*\)\.dylib.*$;\1;' -e 's;^lib\(boost_chrono.*\)\.a.*$;\1;'` ; do
+ ax_lib=${libextension}
+ AC_CHECK_LIB($ax_lib, exit,
+ [BOOST_CHRONO_LIB="-l$ax_lib"; AC_SUBST(BOOST_CHRONO_LIB) link_chrono="yes"; break],
+ [link_chrono="no"])
+ done
+ if test "x$link_chrono" != "xyes"; then
+ for libextension in `ls $BOOSTLIBDIR/boost_chrono*.dll* $BOOSTLIBDIR/boost_chrono*.a* 2>/dev/null | sed 's,.*/,,' | sed -e 's;^\(boost_chrono.*\)\.dll.*$;\1;' -e 's;^\(boost_chrono.*\)\.a.*$;\1;'` ; do
+ ax_lib=${libextension}
+ AC_CHECK_LIB($ax_lib, exit,
+ [BOOST_CHRONO_LIB="-l$ax_lib"; AC_SUBST(BOOST_CHRONO_LIB) link_chrono="yes"; break],
+ [link_chrono="no"])
+ done
+ fi
+
+ else
+ for ax_lib in $ax_boost_user_chrono_lib boost_chrono-$ax_boost_user_chrono_lib; do
+ AC_CHECK_LIB($ax_lib, exit,
+ [BOOST_CHRONO_LIB="-l$ax_lib"; AC_SUBST(BOOST_CHRONO_LIB) link_chrono="yes"; break],
+ [link_chrono="no"])
+ done
+
+ fi
+ if test "x$ax_lib" = "x"; then
+ AC_MSG_ERROR(Could not find a version of the boost_chrono library!)
+ fi
+ if test "x$link_chrono" = "xno"; then
+ AC_MSG_ERROR(Could not link against $ax_lib !)
+ fi
+ fi
+
+ CPPFLAGS="$CPPFLAGS_SAVED"
+ LDFLAGS="$LDFLAGS_SAVED"
+ fi
+])