From 9d00840ec0d824de1a6e2f96028fe0d4c45f0ea9 Mon Sep 17 00:00:00 2001
From: Daniel Burrows <dburrows@debian.org>
Date: Tue, 13 Oct 2009 08:09:18 -0700
Subject: Add a macro to find the Boost date-time library, in case I want it in
 the future.

---
 m4/ax_boost_date_time.m4 | 107 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 107 insertions(+)
 create mode 100644 m4/ax_boost_date_time.m4

diff --git a/m4/ax_boost_date_time.m4 b/m4/ax_boost_date_time.m4
new file mode 100644
index 00000000..773322b0
--- /dev/null
+++ b/m4/ax_boost_date_time.m4
@@ -0,0 +1,107 @@
+# ===========================================================================
+#       http://www.nongnu.org/autoconf-archive/ax_boost_date_time.html
+# ===========================================================================
+#
+# SYNOPSIS
+#
+#   AX_BOOST_DATE_TIME
+#
+# DESCRIPTION
+#
+#   Test for Date_Time 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_DATE_TIME_LIB)
+#
+#   And sets:
+#
+#     HAVE_BOOST_DATE_TIME
+#
+# 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.
+
+AC_DEFUN([AX_BOOST_DATE_TIME],
+[
+	AC_ARG_WITH([boost-date-time],
+	AS_HELP_STRING([--with-boost-date-time@<:@=special-lib@:>@],
+                   [use the Date_Time library from boost - it is possible to specify a certain library for the linker
+                        e.g. --with-boost-date-time=boost_date_time-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_date_time_lib=""
+        else
+		    want_boost="yes"
+        	ax_boost_user_date_time_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 $BOOST_LDFLAGS"
+		export LDFLAGS
+
+        AC_CACHE_CHECK(whether the Boost::Date_Time library is available,
+					   ax_cv_boost_date_time,
+        [AC_LANG_PUSH([C++])
+		 AC_COMPILE_IFELSE(AC_LANG_PROGRAM([[@%:@include <boost/date_time/gregorian/gregorian_types.hpp>]],
+                                   [[using namespace boost::gregorian; date d(2002,Jan,10);
+                                     return 0;
+                                   ]]),
+         ax_cv_boost_date_time=yes, ax_cv_boost_date_time=no)
+         AC_LANG_POP([C++])
+		])
+		if test "x$ax_cv_boost_date_time" = "xyes"; then
+			AC_DEFINE(HAVE_BOOST_DATE_TIME,,[define if the Boost::Date_Time library is available])
+            BOOSTLIBDIR=`echo $BOOST_LDFLAGS | sed -e 's/@<:@^\/@:>@*//'`
+            if test "x$ax_boost_user_date_time_lib" = "x"; then
+                for libextension in `ls $BOOSTLIBDIR/libboost_date_time*.{so,a}* 2>/dev/null | sed 's,.*/,,' | sed -e 's;^lib\(boost_date_time.*\)\.so.*$;\1;' -e 's;^lib\(boost_date_time.*\)\.a*$;\1;'` ; do
+                     ax_lib=${libextension}
+				    AC_CHECK_LIB($ax_lib, exit,
+                                 [BOOST_DATE_TIME_LIB="-l$ax_lib"; AC_SUBST(BOOST_DATE_TIME_LIB) link_date_time="yes"; break],
+                                 [link_date_time="no"])
+  				done
+                if test "x$link_date_time" != "xyes"; then
+                for libextension in `ls $BOOSTLIBDIR/boost_date_time*.{dll,a}* 2>/dev/null | sed 's,.*/,,' | sed -e 's;^\(boost_date_time.*\)\.dll.*$;\1;' -e 's;^\(boost_date_time.*\)\.a*$;\1;'` ; do
+                     ax_lib=${libextension}
+				    AC_CHECK_LIB($ax_lib, exit,
+                                 [BOOST_DATE_TIME_LIB="-l$ax_lib"; AC_SUBST(BOOST_DATE_TIME_LIB) link_date_time="yes"; break],
+                                 [link_date_time="no"])
+  				done
+                fi
+
+            else
+               for ax_lib in $ax_boost_user_date_time_lib boost_date_time-$ax_boost_user_date_time_lib; do
+				      AC_CHECK_LIB($ax_lib, main,
+                                   [BOOST_DATE_TIME_LIB="-l$ax_lib"; AC_SUBST(BOOST_DATE_TIME_LIB) link_date_time="yes"; break],
+                                   [link_date_time="no"])
+                  done
+
+            fi
+			if test "x$link_date_time" != "xyes"; then
+				AC_MSG_ERROR(Could not link against $ax_lib !)
+			fi
+		fi
+
+		CPPFLAGS="$CPPFLAGS_SAVED"
+    	LDFLAGS="$LDFLAGS_SAVED"
+	fi
+])
-- 
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