[glib/3v1n0/strerror_r-int-variant-support: 1/2] gbacktrace: Handle case of strerror_r returning an int value

[Marco Trevisan <marcotrevi src gnome org>]

commit e3a522cc0da3ee087aa67de4665db4da546b975a
Author: Marco Trevisan (Treviño) <mail 3v1n0 net>
Date:   Wed Jul 6 23:45:39 2022 +0200

    gbacktrace: Handle case of strerror_r returning an int value
    
    As it's the case in FreeBSD and Mac OS X.

 glib/gbacktrace.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)
---
diff --git a/glib/gbacktrace.c b/glib/gbacktrace.c
index ae4bdec0c7..9e66df78c4 100644
--- a/glib/gbacktrace.c
+++ b/glib/gbacktrace.c
@@ -323,8 +323,12 @@ stack_trace_sigchld (int signum)
 static inline const char *
 get_strerror (char *buffer, gsize n)
 {
-#ifdef HAVE_STRERROR_R
+#if defined(STRERROR_R_CHAR_P)
   return strerror_r (errno, buffer, n);
+#elif defined(HAVE_STRERROR_R)
+  if (strerror_r (errno, buffer, n) == 0)
+    return buffer;
+  return NULL;
 #else
   const char *error_str = strerror (errno);
   if (!error_str)