From 328bf3626fb2dbbc8c2697c47f391f042e3eb79c Mon Sep 17 00:00:00 2001
From: Fabian Freyer <fabian.freyer@physik.tu-berlin.de>
Date: Fri, 8 Aug 2014 21:16:57 +0200
Subject: [PATCH] autotools: check for ssl.h if pkg-config failed

Some distros provides libssl without openssl.pc.
---
 configure.ac | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/configure.ac b/configure.ac
index 53c0c50..a04993f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -11,7 +11,9 @@ AS_CASE([$host_os],
   [freebsd*], [PLATFORM="freebsd"],
   [PLATFORM="nix"])
 
-PKG_CHECK_MODULES([openssl], [openssl], [], [AC_MSG_ERROR([openssl not found; openssl required])])
+PKG_CHECK_MODULES([openssl], [openssl], [],
+            [AC_CHECK_HEADER(openssl/ssl.h, [openssl_LIBS="-lssl"], [AC_MSG_ERROR([openssl not found; openssl required])])])
+
 PKG_CHECK_MODULES([check], [check >= 0.9.4], [], [AC_MSG_WARN([libcheck not found; unit tests will not be compilable])])
 
 AC_ARG_WITH([libxml2],