From e027c9ea3ceae7f81c8d1a3ea00a4f80b80046d1 Mon Sep 17 00:00:00 2001
From: Steven Franke <s.j.franke@icloud.com>
Date: Tue, 17 Sep 2024 16:00:13 -0500
Subject: [PATCH] fortran_charlen_t should be size_t, not int, with Clang on
 MacOS.

---
 wsjtx_config.h.in | 19 ++++++++++++-------
 1 file changed, 12 insertions(+), 7 deletions(-)

diff --git a/wsjtx_config.h.in b/wsjtx_config.h.in
index 592d9b6b7..81ecac7d4 100644
--- a/wsjtx_config.h.in
+++ b/wsjtx_config.h.in
@@ -59,14 +59,19 @@ extern "C"  {
 
   /* typedef for consistent gfortran ABI for charlen type hidden arguments */
 #if __GNUC__ > 7
-#ifdef __cplusplus
-#include <cstddef>
+   #ifdef __cplusplus
+      #include <cstddef>
+   #else
+      #include <stddef.h>
+   #endif
+   typedef size_t fortran_charlen_t;
 #else
-#include <stddef.h>
-#endif
-  typedef size_t fortran_charlen_t;
-#else
-  typedef int fortran_charlen_t;
+   #if defined(__clang__)
+      #include <stddef.h>
+      typedef size_t fortran_charlen_t;
+   #else
+      typedef int fortran_charlen_t;
+   #endif
 #endif
 
 #ifdef __cplusplus