fix SDL_config.h errors on older glibc

README.md

@@ -1,3 +1,32 @@
+# SDL for Zig
+
 This is a fork of [SDL](https://www.libsdl.org/), packaged for [Zig](https://ziglang.org).
 Unnecessary files have been deleted, and the build system has been replaced with `build.zig`.
 The package provides version 2 of SDL. For version 3, consider https://github.com/castholm/SDL.
+
+## Getting started
+
+### Linking SDL2 to your project
+
+Fetch SDL and add to your `build.zig.zon` :
+```bash
+zig fetch --save=SDL git+https://github.com/allyourcodebase/SDL
+```
+
+Add this to your `build.zig` :
+```zig
+pub fn build(b: *std.Build) void {
+// ...
+
+const sdl_dep = b.dependency("SDL", .{
+    .optimize = .ReleaseFast,
+    .target = target,
+});
+
+// ...
+
+exe.linkLibrary(sdl_dep.artifact("SDL2"));
+
+// ...
+}
+```

build.zig

@@ -1082,8 +1082,8 @@ fn configHeader(b: *std.Build, t: std.Target) *std.Build.Step.ConfigHeader {
         .HAVE_MEMMOVE = 1,
         .HAVE_MEMCMP = 1,
         .HAVE_WCSLEN = 1,
-        .HAVE_WCSLCPY = !is_musl,
-        .HAVE_WCSLCAT = !is_musl,
+        .HAVE_WCSLCPY = !is_linux,
+        .HAVE_WCSLCAT = !is_linux,
         .HAVE__WCSDUP = 0,
         .HAVE_WCSDUP = 1,
         .HAVE_WCSSTR = 1,
@@ -1094,8 +1094,8 @@ fn configHeader(b: *std.Build, t: std.Target) *std.Build.Step.ConfigHeader {
         .HAVE_WCSNCASECMP = 1,
         .HAVE__WCSNICMP = 0,
         .HAVE_STRLEN = 1,
-        .HAVE_STRLCPY = 1,
-        .HAVE_STRLCAT = 1,
+        .HAVE_STRLCPY = !is_linux or is_musl,
+        .HAVE_STRLCAT = !is_linux or is_musl,
         .HAVE__STRREV = 0,
         .HAVE__STRUPR = 0,
         .HAVE__STRLWR = 0,