SDL: cmake: fix os/2 dll name.

SDL Commits
1 
From 86e274515c9da89e4de12b28428b72760ddc8778 Mon Sep 17 00:00:00 2001
From: Ozkan Sezer <[EMAIL REDACTED]>
Date: Thu, 1 Oct 2026 23:55:32 +0300
Subject: [PATCH] cmake: fix os/2 dll name.

---
 CMakeLists.txt | 15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 663199c88be4d..a0f0618838bda 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -305,7 +305,7 @@ set(SDL_CFLAGS )
 
 # When building shared lib for Windows with MinGW,
 # avoid the DLL having a "lib" prefix
-if(WINDOWS)
+if(WINDOWS OR OS2)
   set(CMAKE_SHARED_LIBRARY_PREFIX "")
 endif()
 
@@ -3493,10 +3493,15 @@ if(SDL_SHARED)
       set_target_properties(SDL2 PROPERTIES
         DEFINE_SYMBOL BUILD_SDL)
     endif()
-    set_target_properties(SDL2 PROPERTIES
-      VERSION ${SDL_VERSION}
-      SOVERSION ${LT_REVISION}
-      OUTPUT_NAME "SDL2")
+    if(OS2)
+      set_target_properties(SDL2 PROPERTIES
+        OUTPUT_NAME "SDL2")
+    else()
+      set_target_properties(SDL2 PROPERTIES
+        VERSION ${SDL_VERSION}
+        SOVERSION ${LT_REVISION}
+        OUTPUT_NAME "SDL2")
+    endif()
   endif()
   # Note: The clang toolset for Visual Studio does not support /NODEFAULTLIB.
   if(MSVC AND NOT SDL_LIBC AND NOT MSVC_CLANG AND NOT SDL_CPU_ARM32)