Disabled external gits

cs440-acg/ext/openexr/OpenEXR_Viewers/m4/path.gl.m4

@@ -0,0 +1,18 @@
+dnl
+dnl Alternate OpenGL headers (e.g. for Nvidia headers)
+dnl
+
+AC_DEFUN([AM_PATH_GL],
+[dnl
+dnl Get the cflags
+dnl
+AC_ARG_WITH(gl-includes,[  --with-gl-includes=PFX  Specify which OpenGL headers to use],
+	gl_includes="$withval", gl_includes="")
+  if test x$gl_includes != x ; then
+    GL_CXXFLAGS="-I$gl_includes"
+  else
+    GL_CXXFLAGS=""
+  fi
+
+  AC_SUBST(GL_CXXFLAGS)
+])