From dcea61653538ad315f6d88dda8d54697425c95d0 Mon Sep 17 00:00:00 2001
From: Victor Zverovich <viz@meta.com>
Date: Fri, 26 Sep 2025 07:48:43 -0700
Subject: [PATCH] Fix compilation with locale disabled in header-only mode

---
 include/fmt/chrono.h | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/include/fmt/chrono.h b/include/fmt/chrono.h
index a788d3ec..ffd98e84 100644
--- a/include/fmt/chrono.h
+++ b/include/fmt/chrono.h
@@ -1594,8 +1594,12 @@ class get_locale {
 
  public:
   inline get_locale(bool localized, locale_ref loc) : has_locale_(localized) {
-    if (localized)
-      ::new (&locale_) std::locale(loc.template get<std::locale>());
+    if (!localized) return;
+    ::new (&locale_) std::locale(
+#if FMT_USE_LOCALE
+      loc.template get<std::locale>()
+#endif
+    );
   }
   inline ~get_locale() {
     if (has_locale_) locale_.~locale();