From 669ad7720ef7a82c974bb082db4f9685f4286ffe Mon Sep 17 00:00:00 2001
From: "Dirk-Jan C. Binnema" <djcb@djcbsoftware.nl>
Date: Sat, 15 Oct 2022 10:45:15 +0300
Subject: [PATCH] build: add explicit check for charconv

Some older Apple compilers don't have it; error out early.

Fixes #2347.
---
 meson.build | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/meson.build b/meson.build
index d9ac125c..7c54591f 100644
--- a/meson.build
+++ b/meson.build
@@ -78,7 +78,9 @@ foreach extra_arg : extra_flags
   endif
 endforeach
 
-
+# some clang don't have charconv, but we need it.
+# https://github.com/djcb/mu/issues/2347
+cxx.check_header('charconv', required:true)
 
 ################################################################################
 # config.h setup