Check whether <format> exists

julien-michot · julien-michot · commit 78c794d3b58b · 2025-09-05T10:50:00.000+07:00
diff --git a/include/tinyopt/formatters.h b/include/tinyopt/formatters.h
@@ -23,7 +23,7 @@
 
 #include <tinyopt/traits.h>
 
-#if __cplusplus >= 202002L
+#if (__cplusplus >= 202002L) && __has_include(<format>)
 
 template <typename T>
 struct TINYOPT_FORMAT_NS::formatter<
diff --git a/include/tinyopt/log.h b/include/tinyopt/log.h
@@ -27,7 +27,7 @@
 #define TINYOPT_LOG(...) fmt::print(__VA_ARGS__);
 #define TINYOPT_FORMAT_NS fmt
 
-#elif __cplusplus >= 202002L
+#elif (__cplusplus >= 202002L) && __has_include(<format>)
 
 #include <format>
 
