Fix a few ccache cache miss (#2573)

* Fix ccache cache miss

* Do not define _VERSION_ in python bindings

python/src/CMakeLists.txt

@@ -52,7 +52,6 @@ set_target_properties(
              ${MLX_PYTHON_BINDINGS_OUTPUT_DIRECTORY})
 
 target_link_libraries(core PRIVATE mlx)
-target_compile_definitions(core PRIVATE _VERSION_=${MLX_VERSION})
 
 if(BUILD_SHARED_LIBS)
   if(${CMAKE_SYSTEM_NAME} MATCHES "Darwin")

python/src/mlx.cpp

@@ -2,9 +2,9 @@
 
 #include <nanobind/nanobind.h>
 
-#define STRINGIFY(x) #x
-#define TOSTRING(x) STRINGIFY(x)
+#include "mlx/version.h"
 
+namespace mx = mlx::core;
 namespace nb = nanobind;
 
 void init_mlx_func(nb::module_&);
@@ -48,5 +48,5 @@ NB_MODULE(core, m) {
   init_distributed(m);
   init_export(m);
 
-  m.attr("__version__") = TOSTRING(_VERSION_);
+  m.attr("__version__") = mx::version();
 }