From 1ed0af7f1bbcaccbd7356bd90596f5c942b64720 Mon Sep 17 00:00:00 2001
From: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Date: Fri, 22 Mar 2019 20:24:54 +0100
Subject: [PATCH 1/1] configure.ac: use pkg-config to find openssl

openssl can have multiples dependencies such as libatomic on sparcv8
32 bits

Fixes:
 - http://autobuild.buildroot.org/results/58e5aa7c6ba8fe7474071d7a3cba6ed3a1b4cff4

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
[Upstream status:
https://gitlab.com/fetchmail/fetchmail/merge_requests/14]
---
 configure.ac | 37 +++++++++++++++++++------------------
 1 file changed, 19 insertions(+), 18 deletions(-)

diff --git a/configure.ac b/configure.ac
index 16b0fcba..3a75ec6e 100644
--- a/configure.ac
+++ b/configure.ac
@@ -778,24 +778,25 @@ then
   else
     AC_MSG_ERROR([SSL support enabled, but OpenSSL not found])
   fi
-  LDFLAGS="$LDFLAGS -L$with_ssl/lib"
-  LIBS="$LIBS -lssl -lcrypto"
-  dnl check if -ldl is needed
-  AC_MSG_CHECKING([for additional library dependencies of SSL])
-  found=0
-  save_LIBS="$LIBS"
-  for i in "" "-ldl" ; do
-      LIBS="$LDFLAGS $save_LIBS $i"
-      AC_LINK_IFELSE([AC_LANG_PROGRAM([#include <openssl/ssl.h>],[SSL_library_init()])],[found=1; break])
-  done
-  if test $found = 0 ; then
-      AC_MSG_RESULT([error])
-      AC_MSG_ERROR([cannot link with SSL - check config.log])
-  fi
-  LIBS="$save_LIBS $i"
-  if test "$i" = "" ; then i="(none)" ; fi
-  AC_MSG_RESULT($i)
-  dnl XXX FIXME: use pkg-config if available!
+  PKG_CHECK_MODULES([SSL],[libssl libcrypto],[LIBS="$LIBS $SSL_LIBS"],[
+    LDFLAGS="$LDFLAGS -L$with_ssl/lib"
+    LIBS="$LIBS -lssl -lcrypto"
+    dnl check if -ldl is needed
+    AC_MSG_CHECKING([for additional library dependencies of SSL])
+    found=0
+    save_LIBS="$LIBS"
+    for i in "" "-ldl" ; do
+        LIBS="$LDFLAGS $save_LIBS $i"
+        AC_LINK_IFELSE([AC_LANG_PROGRAM([#include <openssl/ssl.h>],[SSL_library_init()])],[found=1; break])
+    done
+    if test $found = 0 ; then
+        AC_MSG_RESULT([error])
+        AC_MSG_ERROR([cannot link with SSL - check config.log])
+    fi
+    LIBS="$save_LIBS $i"
+    if test "$i" = "" ; then i="(none)" ; fi
+    AC_MSG_RESULT($i)
+  ])
   AC_DEFINE(SSL_ENABLE)
 else
   AC_MSG_WARN(Disabling SSL support.)
-- 
2.20.1