From 9659f22d36acd801fc89f6056ccd846d967ef473 Mon Sep 17 00:00:00 2001
From: Victor Zverovich <viz@meta.com>
Date: Mon, 1 Jan 2024 18:32:53 -0800
Subject: [PATCH] Don't include os.cc in the module if it is disabled via
 FMT_OS

---
 src/fmt.cc | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/src/fmt.cc b/src/fmt.cc
index aa971103..b3d344c6 100644
--- a/src/fmt.cc
+++ b/src/fmt.cc
@@ -83,6 +83,10 @@ export module fmt;
 extern "C++" {
 #endif
 
+#ifndef FMT_OS
+#  define FMT_OS 1
+#endif
+
 // All library-provided declarations and definitions must be in the module
 // purview to be exported.
 #include "fmt/args.h"
@@ -90,8 +94,8 @@ extern "C++" {
 #include "fmt/color.h"
 #include "fmt/compile.h"
 #include "fmt/format.h"
-#if !defined(FMT_OS) || FMT_OS
-# include "fmt/os.h"
+#if FMT_OS
+#  include "fmt/os.h"
 #endif
 #include "fmt/printf.h"
 #include "fmt/std.h"
@@ -107,4 +111,6 @@ module :private;
 #endif
 
 #include "format.cc"
-#include "os.cc"
+#if FMT_OS
+#  include "os.cc"
+#endif
\ No newline at end of file