+dnl
+dnl Mangled Mesa support
+dnl
+AC_ARG_ENABLE([mangling],
+ [AS_HELP_STRING([--enable-mangling],
+ [enable mangled symbols and library name @<:@default=disabled@:>@])],
+ [enable_mangling="${enableval}"],
+ [enable_mangling=no]
+)
+GL_LIB="GL"
+GLU_LIB="GLU"
+OSMESA_LIB="OSMesa"
+if test "x${enable_mangling}" = "xyes" ; then
+ DEFINES="${DEFINES} -DUSE_MGL_NAMESPACE"
+ GL_LIB="MangledGL"
+ GLU_LIB="MangledGLU"
+ OSMESA_LIB="MangledOSMesa"
+fi
+AC_SUBST([GL_LIB])
+AC_SUBST([GLU_LIB])
+AC_SUBST([OSMESA_LIB])
+