fix x86_64-linux-gnu build

Signed-off-by: Stephen Gutekanst <stephen@hexops.com>

build.zig

@@ -279,6 +279,9 @@ pub fn build(b: *std.Build) !void {
         }
         addPaths(&unit_tests.root_module);
 
+        // Linux gamemode requires libc.
+        if (target.result.os.tag == .linux) unit_tests.root_module.link_libc = true;
+
         // Exposes a `test` step to the `zig build --help` menu, providing a way for the user to
         // request running the unit tests.
         const run_unit_tests = b.addRunArtifact(unit_tests);

src/core/platform/glfw/Core.zig

@@ -1317,7 +1317,7 @@ fn detectBackendType(allocator: std.mem.Allocator) !gpu.BackendType {
 }
 
 /// Check if gamemode should be activated
-fn wantGamemode(allocator: std.mem.Allocator) error{ OutOfMemory, InvalidUtf8 }!bool {
+fn wantGamemode(allocator: std.mem.Allocator) error{ OutOfMemory, InvalidUtf8, InvalidWtf8 }!bool {
     const use_gamemode = std.process.getEnvVarOwned(
         allocator,
         "MACH_USE_GAMEMODE",

src/sysaudio/alsa.zig

@@ -132,7 +132,7 @@ pub const Context = struct {
                     };
                     errdefer std.os.inotify_rm_watch(notify_fd, notify_wd);
 
-                    const notify_pipe_fd = std.os.pipe2(std.os.O.NONBLOCK) catch |err| switch (err) {
+                    const notify_pipe_fd = std.os.pipe2(.{ .NONBLOCK = true }) catch |err| switch (err) {
                         error.ProcessFdQuotaExceeded,
                         error.SystemFdQuotaExceeded,
                         => return error.SystemResources,