Don't check for OpenGL libraries without at least including -lm

diff --git a/configure.ac b/configure.ac
index c9fbf0d165da2b127e393436eb2e9717f9cd07ca..1cb94192630bede2a0f347f39d6507338d6ec87e 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -234,7 +234,6 @@ AC_SEARCH_LIBS(cos, m)
 AC_SEARCH_LIBS(dlclose, dl)
 
 base_LIBS="$LIBS"
-LIBS=""
 
 dnl check for glut location
 AC_CHECK_HEADER(GL/glut.h)