From 61a78231a1d6da47073f9c309d6075d9bb3f11cb Mon Sep 17 00:00:00 2001
From: Felix Yan <felixonmars@archlinux.org>
Date: Sun, 25 Feb 2024 19:04:05 +0000
Subject: [PATCH] m4: Correctly detect GCC version
When calling as `cc`, GCC does not outputs lowercased "gcc" at least in 13.2.1 version here.
```
$ cc --version
cc (GCC) 13.2.1 20230801
...
```
This fails the check and outputs the confusing message: `configure: $CC is not gcc; assuming it's a reasonably new C compiler`
This patch makes it check for upper-cased "GCC" too so that it works correctly:
```
checking version of gcc... 13.2.1
```
---
m4/fp_gcc_version.m4 | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/m4/fp_gcc_version.m4 b/m4/fp_gcc_version.m4
index df581a69f4e4..c1a7f8c5b748 100644
--- a/m4/fp_gcc_version.m4
+++ b/m4/fp_gcc_version.m4
@@ -8,7 +8,7 @@ AC_DEFUN([FP_GCC_VERSION], [
AC_MSG_ERROR([C compiler is required])
fi
- if $CC --version | grep -q gcc; then
+ if $CC --version | grep -qi gcc; then
AC_CACHE_CHECK([version of gcc], [fp_cv_gcc_version],
[
# Be sure only to look at the first occurrence of the "version " string;
--
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