fix

Author: SchrodingerZhu

libc/hdr/CMakeLists.txt

@@ -224,8 +224,13 @@ add_proxy_header_library(
 )
 
 # offsetof is a macro inside compiler resource header stddef.h
-# defining it directly as a header library
-add_header_library(offsetof_macros HDRS offsetof_macros.h)
+add_proxy_header_library(
+  offsetof_macros
+  HDRS
+    offsetof_macros.h
+  FULL_BUILD_DEPENDS
+    libc.include.llvm-libc-macros.offsetof_macros
+)
 
 add_subdirectory(types)
 add_subdirectory(func)