Fix building with older versions of libtool

The libtool on RHEL5 doesn't set LTDEPS, therefore
we failed to compile the builtin ltdl lib.

It does however set LIBLTDL to the path of the if it is
going to build an internal one. Use that.

Fixes building from git on RHEL5

diff --git a/configure.ac b/configure.ac
index e3ade4a8c13939adda9beb62db8fe87b6b3ef695..c0c4be3dd36e5affeb78b5202bcf4d6cabb46b9a 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -29,7 +29,7 @@ m4_ifdef([LT_PACKAGE_VERSION],
        ]
 )
 
-AM_CONDITIONAL([BUILD_INCLUDED_LTDL], [test "x$LTDLDEPS" != "x"])
+AM_CONDITIONAL([BUILD_INCLUDED_LTDL], [test "x${LIBLTDL}" = 'x${top_builddir}/libltdl/libltdlc.la'])
 
 AM_INIT_AUTOMAKE([tar-pax dist-bzip2 foreign])
 m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])