Squashed 'external/SDL/' content from commit 716c767b7

git-subtree-dir: external/SDL
git-subtree-split: 716c767b7e7099fb0e2fda9db59227a7e1d1d8a4

build-scripts/djgpp-platform-overrides.cmake

@@ -0,0 +1,17 @@
+# DJGPP platform overrides for DOS
+#
+# CMake's built-in Platform/DOS.cmake assumes OpenWatcom naming conventions
+# (no prefix, .lib suffix, CMAKE_LINK_LIBRARY_SUFFIX=".lib").  DJGPP uses
+# standard Unix/GCC conventions for its system libraries (lib prefix, .a
+# suffix — e.g. libm.a).
+#
+# This file is loaded via CMAKE_USER_MAKE_RULES_OVERRIDE in the toolchain
+# file, which runs *after* the platform module has set its defaults, giving
+# us the final say on these variables.
+
+set(CMAKE_STATIC_LIBRARY_PREFIX "lib")
+set(CMAKE_STATIC_LIBRARY_SUFFIX ".a")
+set(CMAKE_LINK_LIBRARY_SUFFIX "")
+set(CMAKE_FIND_LIBRARY_PREFIXES "lib" "")
+set(CMAKE_FIND_LIBRARY_SUFFIXES ".a" ".lib")
+set(CMAKE_EXECUTABLE_SUFFIX ".exe")