From 6f743cd8dbdea00dd7ca1e1f3cac10c583dee010 Mon Sep 17 00:00:00 2001
From: Cary R <cygcary@yahoo.com>
Date: Fri, 16 Aug 2024 18:35:56 -0700
Subject: [PATCH] Only add -D__USE_MINGW_ANSI_STDIO=1 for MINGW64/32

---
 configure.ac | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/configure.ac b/configure.ac
index e5c430bd1..42f4e9fb8 100644
--- a/configure.ac
+++ b/configure.ac
@@ -240,8 +240,16 @@ case "${host}" in
 	CFLAGS="-mieee $CFLAGS"
 	;;
     *-*-mingw*)
-	CXXFLAGS="-D__USE_MINGW_ANSI_STDIO=1 $CXXFLAGS"
-	CFLAGS="-D__USE_MINGW_ANSI_STDIO=1 $CFLAGS"
+	# The MINGW64/32 environments link to MSVCRT which has stdio issues
+	# so use the slower, but functional mingw versions for this case.
+	case "${MSYSTEM}" in
+	    MINGW*)
+		CXXFLAGS="-D__USE_MINGW_ANSI_STDIO=1 $CXXFLAGS"
+		CFLAGS="-D__USE_MINGW_ANSI_STDIO=1 $CFLAGS"
+		AC_MSG_NOTICE([${MSYSTEM} needs -D__USE_MINGW_ANSI_STDIO=1])
+		;;
+
+	esac
 	;;
 esac