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https://github.com/mm2/Little-CMS/pull/338
From 61493b49b91740a84dea61b72a8ce7dc40afa766 Mon Sep 17 00:00:00 2001
From: Sam James <sam@gentoo.org>
Date: Mon, 12 Sep 2022 17:56:31 +0100
Subject: [PATCH] configure.ac: fix configure tests broken with Clang 15
(-Wimplicit-int)
Clang 15 makes -Wimplicit-int an error by default.
Before this fix, configure would think SSE2 support is not present
when it is:
```
checking whether compiler supports SSE2... no
```
Signed-off-by: Sam James <sam@gentoo.org>
--- a/configure.ac
+++ b/configure.ac
@@ -212,7 +212,7 @@ AC_LANG_PUSH([C])
AC_MSG_CHECKING([whether compiler supports SSE2])
AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
#include <emmintrin.h>
- main() { __m128i n = _mm_set1_epi8(42); }]])],
+ int main() { __m128i n = _mm_set1_epi8(42); }]])],
[ac_compiler_supports_sse2=yes], [ac_compiler_supports_sse2=no])
AC_MSG_RESULT([$ac_compiler_supports_sse2])
AS_IF([test "x$ac_compiler_supports_sse2" != "xyes"],
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