fix: xmake use c99

src/1-7-transformations/1-scale-rotate.c

@@ -156,7 +156,8 @@ void frame(void) {
     sfetch_dowork();
     HMM_Mat4 rotate = HMM_Rotate_RH(HMM_AngleDeg(90.0f), HMM_V3(0.0f, 0.0f, 1.0f));
     HMM_Mat4 scale = HMM_Scale(HMM_V3(0.5f, 0.5f, 0.5f));
-    HMM_Mat4 trans = HMM_Mul(rotate, scale);
+    HMM_Mat4 trans = HMM_MulM4(rotate, scale);
+
 
     sg_begin_pass(&(sg_pass){ .action = state.pass_action, .swapchain = sglue_swapchain() });
     sg_apply_pipeline(state.pip);

xmake.lua

@@ -8,24 +8,29 @@ add_requires("stb", "sokol", "handmade_math", "sokol-shdc")
 add_requires("imgui 1.x", {configs={backend="none"}})
 
 if is_plat("windows") then
+    add_cflags("/TC", {tools = {"clang_cl", "cl"}})
+    add_cxxflags("/EHsc", {tools = {"clang_cl", "cl"}})
+    add_defines("UNICODE", "_UNICODE")
     add_defines("SOKOL_WIN32_FORCE_MAIN")
-    add_cxflags("/utf-8")
-elseif is_plat("mingw") then
+end
+
+if is_plat("mingw") then
     add_ldflags("-static")
 end
-add_languages("c++20")
 
 add_includedirs("libs/sokol")
+set_encodings("utf-8")
+set_languages("c99")
 
 if is_plat("windows", "mingw") then
-	-- add_defines("SOKOL_GLCORE33")
-    add_defines("SOKOL_D3D11")
+	add_defines("SOKOL_GLCORE")
+    -- add_defines("SOKOL_D3D11")
 elseif is_plat("macosx") then
     add_defines("SOKOL_METAL")
 elseif is_plat("wasm") then 
     add_defines("SOKOL_GLES3")
 else
-	add_defines("SOKOL_GLCORE33")
+	add_defines("SOKOL_GLCORE")
 end
 
 local function split(input, delimiter)