Fix build kinks on windows

.gitignore

@@ -0,0 +1,22 @@
+# Ignore build outputs
+/build/
+
+# Ignore xmake temporary files
+.xmake/
+
+# Ignore LuaJIT generated files (if any)
+luajit/src/*.o
+luajit/src/*.obj
+luajit/src/*.exe
+luajit/src/*.so
+luajit/src/*.dll
+luajit/src/*.dylib
+
+# Ignore log files
+*.log
+
+# Ignore editor/IDE-specific files
+.vscode/
+.idea/
+*.swp
+.DS_Store

README.md

@@ -1,3 +1,3 @@
 # LuaJIT
 
-Need to be able to build LuaJIT cross-platform for the Go wrapper.
+A way to build static and dynamic libraries for LuaJIT. Uses xmake and gcc to build and copy over linkable headers/libraries.

xmake.lua

@@ -0,0 +1,102 @@
+-- Project setup
+set_project("LuaJIT")
+set_version("2.1.0")
+set_config("buildir", "build")
+
+target("luajit")
+    set_kind("phony")
+    
+    on_build(function (target)
+        import("core.tool.toolchain")
+        import("lib.detect.find_tool")
+        import("core.project.config")
+        
+        -- Change to LuaJIT src dir first
+        os.cd("luajit/src")
+        
+        -- Get number of CPU cores for parallel build
+        local cpu_num = os.cpuinfo().ncpu
+        
+        -- Use gcc
+        os.setenv("CC", "gcc")
+        
+        -- Use make/mingw32-make based on platform
+        if is_plat("windows") then
+            local make = find_tool("mingw32-make")
+            if not make then
+                raise("mingw32-make not found!")
+            end
+            
+            -- Build with CMD shell
+            os.execv(make.program, {"-j" .. cpu_num, "SHELL=cmd.exe"})
+        else
+            local make = find_tool("make")
+            if not make then
+                raise("make not found!")
+            end
+            os.exec(string.format("%s -j%d", make.program, cpu_num))
+        end
+
+        -- Copy build outputs to /build
+        os.mkdir("../../build")
+        if is_plat("windows") then
+            -- Dynamic libraries and executable
+            os.cp("*.dll", "../../build")
+            os.cp("luajit.exe", "../../build")
+            -- Static libraries
+            os.cp("*.lib", "../../build")
+            os.cp("*.exp", "../../build")
+            os.cp("*.a", "../../build")
+            -- Headers for embedding
+            os.cp("lua.h", "../../build")
+            os.cp("luaconf.h", "../../build")
+            os.cp("lualib.h", "../../build")
+            os.cp("luajit.h", "../../build")
+            os.cp("lauxlib.h", "../../build")
+        else
+            os.cp("libluajit.so", "../../build", {force = true})
+            os.cp("libluajit.a", "../../build")
+            os.cp("luajit", "../../build")
+            -- Headers for embedding
+            os.cp("lua.h", "../../build")
+            os.cp("luaconf.h", "../../build")
+            os.cp("lualib.h", "../../build")
+            os.cp("luajit.h", "../../build")
+            os.cp("lauxlib.h", "../../build")
+        end
+        
+        os.cd("../../")
+    end)
+
+    on_clean(function (target)
+        -- Clean build directory
+        os.rm("build")
+        
+        -- Clean generated files in LuaJIT src directory
+        os.cd("luajit/src")
+        os.rm("*.o")
+        os.rm("*.obj")
+        os.rm("*.lib")
+        os.rm("*.exp")
+        os.rm("*.dll")
+        os.rm("*.exe")
+        os.rm("*.manifest")
+        os.rm("*.pdb")
+        os.rm("*.ilk")
+        os.rm("*.a")
+        os.rm("host/*.o")
+        os.rm("host/*.obj")
+        os.rm("host/minilua.exe")
+        os.rm("host/buildvm.exe")
+        os.rm("lj_vm.S")
+        os.rm("lj_bcdef.h")
+        os.rm("lj_ffdef.h")
+        os.rm("lj_libdef.h")
+        os.rm("lj_recdef.h")
+        os.rm("lj_folddef.h")
+        os.rm("host/buildvm_arch.h")
+        os.rm("luajit.h")
+        os.rm("luajit_relver.txt")
+        os.rm("jit/vmdef.lua")
+        os.cd("../../")
+    end)