conditionally compile for osx lion as well as snow leopard

Makefile.in

@@ -11,6 +11,9 @@ ifeq ($(shell uname -s),Darwin)
 ifeq ($(shell sw_vers | grep -c 10.6),1)
 RUSTFLAGS += --cfg mac_10_6
 endif
+ifeq ($(shell sw_vers | grep -c 10.7),1)
+RUSTFLAGS += --cfg mac_10_7
+endif
 endif
 
 RUST_SRC=$(shell find $(VPATH)/. -type f -name '*.rs')

gl2.rs

@@ -1012,7 +1012,7 @@ pub fn vertex_attrib_pointer_u8(index: GLuint,
 }
 
 #[cfg(not(target_os="macos"))]
-#[cfg(not(mac_10_6))]
+#[cfg(not(mac_10_6), not(mac_10_7))]
 pub fn vertex_attrib_divisor(index: GLuint, divisor: GLuint) {
     unsafe {
         glVertexAttribDivisor(index, divisor);
@@ -1346,7 +1346,7 @@ pub fn glVertexAttrib4fv(indx: GLuint, values: *GLfloat);
 pub fn glVertexAttribPointer(indx: GLuint, size: GLint, _type: GLenum, normalized: GLboolean, stride: GLsizei, ptr: *GLvoid);
 
 #[cfg(not(target_os="macos"))]
-#[cfg(not(mac_10_6))]
+#[cfg(not(mac_10_6), not(mac_10_7))]
 pub fn glVertexAttribDivisor(indx: GLuint, divisor: GLuint);
 
 pub fn glViewport(x: GLint, y: GLint, width: GLsizei, height: GLsizei);