From 9c83bddf2363a0f6b7ebbc4e13774f80d38ee27b Mon Sep 17 00:00:00 2001
From: des <des@d4fa192b-c00b-0410-8231-f00ffab90ce4>
Date: Tue, 8 Aug 2006 07:03:35 +0000
Subject: [PATCH] Attempt to detect the availability of RSA's MD5
 implementation, and the need to link against libmd to get it. Attempt to
 detect the need for linking against librt to get clock_gettime().

git-svn-id: svn+ssh://projects.linpro.no/svn/varnish/trunk@759 d4fa192b-c00b-0410-8231-f00ffab90ce4
---
 varnish-cache/bin/varnishd/Makefile.am    | 10 ++++++++--
 varnish-cache/bin/varnishd/hash_classic.c |  5 +++++
 varnish-cache/configure.ac                | 10 ++++++++++
 3 files changed, 23 insertions(+), 2 deletions(-)

diff --git a/varnish-cache/bin/varnishd/Makefile.am b/varnish-cache/bin/varnishd/Makefile.am
index a15bd305..0c72bd88 100644
--- a/varnish-cache/bin/varnishd/Makefile.am
+++ b/varnish-cache/bin/varnishd/Makefile.am
@@ -58,5 +58,11 @@ varnishd_LDADD = \
 	$(top_builddir)/lib/libcompat/libcompat.a \
 	$(top_builddir)/lib/libvarnish/libvarnish.la \
 	$(top_builddir)/lib/libvcl/libvcl.la \
-	-lpthread \
-	-lmd
+	-lpthread
+
+if NEED_LIBMD
+varnishd_LDADD += -lmd
+endif
+if NEED_LIBRT
+varnishd_LDADD += -lrt
+endif
diff --git a/varnish-cache/bin/varnishd/hash_classic.c b/varnish-cache/bin/varnishd/hash_classic.c
index 9b8fc068..e6c6971c 100644
--- a/varnish-cache/bin/varnishd/hash_classic.c
+++ b/varnish-cache/bin/varnishd/hash_classic.c
@@ -13,6 +13,11 @@
 
 #include <cache.h>
 
+#if defined(HASH_CLASSIC_MD5) && !defined(HAVE_MD5)
+/* MD5 is not available */
+#undef HASH_CLASSIC_MD5
+#endif
+
 #ifdef HASH_CLASSIC_MD5
 #include <md5.h>
 #endif
diff --git a/varnish-cache/configure.ac b/varnish-cache/configure.ac
index bfa71b59..3e839329 100644
--- a/varnish-cache/configure.ac
+++ b/varnish-cache/configure.ac
@@ -81,6 +81,16 @@ AC_CHECK_DECL([SO_ACCEPTFILER],
 	,
 	[sys/types.h, sys/socket.h])
 
+# On some systems, clock_gettime is in librt rather than libc
+AC_CHECK_LIB(rt, clock_gettime, need_librt=yes)
+AM_CONDITIONAL(NEED_LIBRT, test x$need_librt = xyes)
+
+AC_CHECK_HEADERS([md5.h])
+if test x$ac_cv_header_md5_h = xyes ; then
+	AC_CHECK_LIB(md, MD5Init, need_libmd=yes)
+fi
+AM_CONDITIONAL(NEED_LIBMD, test x$need_libmd = xyes)
+
 AC_CONFIG_FILES([
     Makefile
     bin/Makefile
-- 
2.39.5