SDL: cmake: add OS2 to OPT_DEF_LIBC enable list. (87efb)

SDL Commits
1 
From 87efb7e862612a51974167b1ed97a8e3011a8b5f Mon Sep 17 00:00:00 2001
From: Ozkan Sezer <[EMAIL REDACTED]>
Date: Fri, 20 Mar 2026 07:32:50 +0300
Subject: [PATCH] cmake: add OS2 to OPT_DEF_LIBC enable list.

(cherry picked from commit 738b1e4f47bd1b249f32bc2fbfc4cb74779448f4)
---
 CMakeLists.txt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 27e0cc9900868..0f9dea7091b9d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -242,7 +242,7 @@ if(USE_GCC OR USE_CLANG OR USE_INTELCC OR USE_QCC)
 endif()
 
 # Default option knobs
-if(UNIX OR MINGW OR MSYS OR (USE_CLANG AND NOT WINDOWS) OR VITA OR PSP OR PS2 OR N3DS OR SDL_CPU_ARM64EC)
+if(UNIX OR MINGW OR MSYS OR OS2 OR (USE_CLANG AND NOT WINDOWS) OR VITA OR PSP OR PS2 OR N3DS OR SDL_CPU_ARM64EC)
   set(OPT_DEF_LIBC ON)
 endif()
 if(WINDOWS OR MACOS OR IOS OR TVOS OR VISIONOS OR WATCHOS)