- (dtucker) [configure.ac] Bug #1181: Explicitly test to see if OpenSSL

   (0.9.8a and presumably newer) requires -ldl to successfully link.

2 files changed, 45 insertions, 6 deletions

diff --git a/ChangeLog b/ChangeLog
index dc43a0544..62adc612b 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -4,6 +4,8 @@
    afterward.  Removes the need to mangle $LIBS later to remove -lpam and -ldl.
  - (dtucker) [configure.ac] Relocate --with-pam parts in preparation for
    fixing bug #1181.  No changes yet.
+ - (dtucker) [configure.ac] Bug #1181: Explicitly test to see if OpenSSL
+   (0.9.8a and presumably newer) requires -ldl to successfully link.
 
 20060819
  - (djm) OpenBSD CVS Sync
@@ -5281,4 +5283,4 @@
    - (djm) Trim deprecated options from INSTALL. Mention UsePAM
    - (djm) Fix quote handling in sftp; Patch from admorten AT umich.edu
 
-$Id: ChangeLog,v 1.4501 2006/08/20 10:03:50 dtucker Exp $
+$Id: ChangeLog,v 1.4502 2006/08/20 10:17:53 dtucker Exp $
diff --git a/configure.ac b/configure.ac
index a3eec9520..b2939eeed 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,4 +1,4 @@
-# $Id: configure.ac,v 1.353 2006/08/20 10:03:50 dtucker Exp $
+# $Id: configure.ac,v 1.354 2006/08/20 10:17:53 dtucker Exp $
 #
 # Copyright (c) 1999-2004 Damien Miller
 #
@@ -15,7 +15,7 @@
 # OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 
 AC_INIT(OpenSSH, Portable, openssh-unix-dev@mindrot.org)
-AC_REVISION($Revision: 1.353 $)
+AC_REVISION($Revision: 1.354 $)
 AC_CONFIG_SRCDIR([ssh.c])
 
 AC_CONFIG_HEADER(config.h)
@@ -1825,6 +1825,36 @@ Also see contrib/findssl.sh for help identifying header/library mismatches.])
         ]
 )
 
+AC_MSG_CHECKING([if programs using OpenSSL functions will link])
+AC_LINK_IFELSE(
+        [AC_LANG_SOURCE([[
+#include <openssl/evp.h>
+int main(void) { SSLeay_add_all_algorithms(); }
+        ]])],
+        [
+                AC_MSG_RESULT(yes)
+        ],
+        [
+                AC_MSG_RESULT(no)
+                saved_LIBS="$LIBS"
+                LIBS="$LIBS -ldl"
+                AC_MSG_CHECKING([if programs using OpenSSL need -ldl])
+                AC_LINK_IFELSE(
+                        [AC_LANG_SOURCE([[
+#include <openssl/evp.h>
+int main(void) { SSLeay_add_all_algorithms(); }
+                        ]])],
+                        [
+                                AC_MSG_RESULT(yes)
+                        ],
+                        [
+                                AC_MSG_RESULT(no)
+                                LIBS="$saved_LIBS"
+                        ]
+                )
+        ]
+)
+
 AC_ARG_WITH(ssl-engine,
         [  --with-ssl-engine       Enable OpenSSL (hardware) ENGINE support ],
         [ if test "x$withval" != "xno" ; then
@@ -1926,12 +1956,19 @@ AC_ARG_WITH(pam,
 
                         PAM_MSG="yes"
 
+                        LIBPAM="-lpam"
                         AC_DEFINE(USE_PAM, 1,
                                 [Define if you want to enable PAM support])
+
                         if test $ac_cv_lib_dl_dlopen = yes; then
-                                LIBPAM="-lpam -ldl"
-                        else
-                                LIBPAM="-lpam"
+                                case "$LIBS" in
+                                *-ldl*)
+                                        # libdl already in LIBS
+                                        ;;
+                                *)
+                                        LIBPAM="-$LIBPAM -ldl"
+                                        ;;
+                                esac
                         fi
                         AC_SUBST(LIBPAM)
                 fi