From c53932d12d468a2593562d80cf014bca3f397ade Mon Sep 17 00:00:00 2001
From: DRC <information@libjpeg-turbo.org>
Date: Tue, 23 Sep 2025 08:40:41 -0400
Subject: [PATCH] Win: Don't use GCC/Clang visibility attribute

Symbols are hidden by default on Windows, so
__attribute__((visibility("hidden"))) produced a warning ("visibility
attribute not supported in this configuration; ignored") with certain
versions of MinGW if libjpeg-turbo was built without SIMD extensions.
---
 CMakeLists.txt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index c9b42813..d96f9f5a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -525,7 +525,7 @@ if(UNIX)
   endif()
 endif()
 
-if(NOT MSVC OR CMAKE_C_COMPILER_ID MATCHES "Clang")
+if(NOT WIN32)
   check_c_source_compiles("extern const int table[1]; const int __attribute__((visibility(\"hidden\"))) table[1] = { 0 }; int main(void) { return table[0]; }"
     HIDDEN_WORKS)
   if(HIDDEN_WORKS)