https://github.com/libsdl-org/autoconf/commit/f460883035ef849a2248b1713f711292ec19f4f0
From f460883035ef849a2248b1713f711292ec19f4f0 Mon Sep 17 00:00:00 2001
From: Emanuele Giaquinta <[EMAIL REDACTED]>
Date: Fri, 14 May 2021 09:06:20 +0300
Subject: [PATCH] _AC_PROG_CXX_STDCXX_EDITION_TRY: fix typo in variable name
The typo causes "ac_prog_cxx_stdcxx" to be always set to "cxx11",
regardless of whether the C++ compiler supports C++11.
Message-Id: <YJ4TXAeJcvU0oSec@FSAPPLE2215.fi.f-secure.com>
(tiny change)
---
lib/autoconf/c.m4 | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/lib/autoconf/c.m4 b/lib/autoconf/c.m4
index 9f881f0b..47434c89 100644
--- a/lib/autoconf/c.m4
+++ b/lib/autoconf/c.m4
@@ -2749,8 +2749,8 @@ AC_DEFUN([_AC_PROG_CXX_STDCXX_EDITION_TRY],
[AC_REQUIRE([_AC_CXX_CXX$1_TEST_PROGRAM])]dnl
[AS_IF([test x$ac_prog_cxx_stdcxx = xno],
[AC_MSG_CHECKING([for $CXX option to enable C++$1 features])
-AC_CACHE_VAL(ac_cv_prog_cxx_$1,
-[ac_cv_prog_cxx_$1=no
+AC_CACHE_VAL(ac_cv_prog_cxx_cxx$1,
+[ac_cv_prog_cxx_cxx$1=no
ac_save_CXX=$CXX
AC_LANG_CONFTEST([AC_LANG_DEFINES_PROVIDED][$][ac_cxx_conftest_cxx$1_program])
for ac_arg in '' m4_normalize(m4_defn([_AC_CXX_CXX$1_OPTIONS]))