Support macos

bundle_static.cmake

@@ -38,7 +38,19 @@ function(bundle_static_library tgt_name bundled_tgt_name)
   set(bundled_tgt_full_name 
     ${CMAKE_BINARY_DIR}/${CMAKE_STATIC_LIBRARY_PREFIX}${bundled_tgt_name}${CMAKE_STATIC_LIBRARY_SUFFIX})
   
-  if (UNIX OR APPLE)
+  if (APPLE)
+    find_program(lib_tool libtool)
+
+    foreach(tgt IN LISTS static_libs)
+      list(APPEND static_libs_full_names $<TARGET_FILE:${tgt}>)
+    endforeach()
+
+    add_custom_command(
+      COMMAND ${lib_tool} -static -o ${bundled_tgt_full_name} ${static_libs_full_names}
+      OUTPUT ${bundled_tgt_full_name}
+      COMMENT "Bundling ${bundled_tgt_name}"
+      VERBATIM)
+  elseif(UNIX)
     file(WRITE ${CMAKE_BINARY_DIR}/${bundled_tgt_name}.ar.in
     "CREATE ${bundled_tgt_full_name}\n" )
         
@@ -64,7 +76,7 @@ function(bundle_static_library tgt_name bundled_tgt_name)
         OUTPUT ${bundled_tgt_full_name}
         COMMENT "Bundling ${bundled_tgt_name}"
         VERBATIM)
-  elseif(MSVC)
+  elseif(WIN32)
     find_program(lib_tool lib)
 
     foreach(tgt IN LISTS static_libs)