Check for dlopen in standard libraries first (needed for DEC OSF).

[meshlink] / m4 / openssl.m4

diff --git a/m4/openssl.m4 b/m4/openssl.m4
index bf5ce9fcaae010fdef98cff8e61c5ec7fd60629a..d9f8e1634d490d52da569b7e1c9b0d4d9ccd41f1 100644 (file)
--- a/m4/openssl.m4
+++ b/m4/openssl.m4
@@ -28,4 +28,12 @@ AC_DEFUN(tinc_OPENSSL,
     [LIBS="$LIBS -lcrypto"],
     [AC_MSG_ERROR("OpenSSL libraries not found.")]
   )
+
+  AC_CHECK_FUNC(dlopen,
+    [],
+    AC_CHECK_LIB(dl, dlopen,
+      [LIBS="$LIBS -ldl"],
+      [AC_MSG_ERROR("OpenSSL depends on libdl.")]
+    )
+  )
 ])