+ # If using glvnd the pkg-config header should not point to GL_mesa, it should
+ # point to GL. glvnd is only available on unix like platforms so adding -l
+ # should be safe here
+ # TODO: in the glvnd case glvnd itself should really be providing this.
+ if with_glvnd
+ _gl = '-L${libdir} -lGL'
+ else
+ _gl = libgl
+ endif
+