fix LTO on MacOS

If no `-minimum-os-version` is given, ignore the `override-module`
warnings. The user not using, `-minimum-os-version` opts you into linker
warnings about target versions.

If a `-minimum-os-version` is provided, normalize it to a full version
`11` to `11.0.0` for example. The linker seems to want that when doing
LTO.

1 files changed, 4 insertions, 0 deletions

diff --git a/src/linker.cpp b/src/linker.cpp
index f369a5a38..4ad3cf6d2 100644
--- a/src/linker.cpp
+++ b/src/linker.cpp
@@ -978,6 +978,10 @@ try_cross_linking:;
 			if (build_context.lto_kind != LTO_None) {
 				link_command_line = gb_string_appendc(link_command_line, " -flto=thin");
 				link_command_line = gb_string_append_fmt(link_command_line, " -flto-jobs=%d ", build_context.thread_count);
+
+				if (is_osx && !build_context.minimum_os_version_string_given) {
+					link_command_line = gb_string_appendc(link_command_line, " -Wno-override-module ");
+				}
 			}
 
 			link_command_line = gb_string_appendc(link_command_line, object_files);