configure --help says that builders can set those variables to override
pkgconfig settings, but configure.ac was overwriting those before calling
PKG_CHECK_MODULES

Signed-off-by: Alan Coopersmith <alan.coopersm...@oracle.com>
---
 configure.ac |    8 +++-----
 1 files changed, 3 insertions(+), 5 deletions(-)

diff --git a/configure.ac b/configure.ac
index d6753a9..36e42f8 100644
--- a/configure.ac
+++ b/configure.ac
@@ -81,17 +81,15 @@ AC_CHECK_LIB([glut],
                [],
                [glut_enabled=no])
 
-GLEW_CFLAGS=""
-GLEW_LIBS="-lGLEW"
 dnl Include a fallback path for GLEW for the moment while not all distros
 dnl have picked up the .pc file.
 PKG_CHECK_MODULES(GLEW, [glew], [], [
                  AC_CHECK_HEADER([GL/glew.h],
-                 [],
-                 AC_MSG_ERROR([GLEW required]))
+                                 [GLEW_CFLAGS=""],
+                                 AC_MSG_ERROR([GLEW required]))
                  AC_CHECK_LIB([GLEW],
                               [glewInit],
-                              [],
+                              [GLEW_LIBS="-lGLEW"],
                               AC_MSG_ERROR([GLEW required]))
                  ])
 DEMO_CFLAGS="$DEMO_CFLAGS $GLEW_CFLAGS"
-- 
1.7.3.2

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