compile LuaJIT with xmake

LuaJIT自带的编译脚本虽然很纯正，不依赖编译器之外的程序，但是在不便于阅读和维护，打算改为xmake描述编译过程。
原版在Windows上是一个简单的bat定义了编译过程，内容比较简洁，已经翻译成了对应的xmake，只编译了链接库，没编译luajit.exe，暂时不需要exe
翻译过程借助了编译输出日志，日志如下：

D:UEProjectLuaJITsrc>cl /nologo /c /O2 /W3 /D_CRT_SECURE_NO_DEPRECATE /D_CRT_STDIO_INLINE=__declspec(dllexport)__inline  /DLUAJIT_ENABLE_LUA52COMPAT hostminilua.c 
minilua.c

D:UEProjectLuaJITsrc>link /nologo /out:minilua.exe minilua.obj 
   Creating library minilua.lib and object minilua.exp

D:UEProjectLuaJITsrc>if exist minilua.exe.manifest mt /nologo -manifest minilua.exe.manifest -outputresource:minilua.exe 

D:UEProjectLuaJITsrc>minilua ..dynasmdynasm.lua -LN -D WIN -D JIT -D FFI -D P64 -o hostuildvm_arch.h vm_x64.dasc 

D:UEProjectLuaJITsrc>cl /nologo /c /O2 /W3 /D_CRT_SECURE_NO_DEPRECATE /D_CRT_STDIO_INLINE=__declspec(dllexport)__inline  /DLUAJIT_ENABLE_LUA52COMPAT /I "." /I ..dynasm hostuildvm*.c 
buildvm.c
buildvm_asm.c
buildvm_fold.c
buildvm_lib.c
buildvm_peobj.c
Generating Code...

D:UEProjectLuaJITsrc>link /nologo /out:buildvm.exe buildvm*.obj 
   Creating library buildvm.lib and object buildvm.exp

D:UEProjectLuaJITsrc>if exist buildvm.exe.manifest mt /nologo -manifest buildvm.exe.manifest -outputresource:buildvm.exe 

D:UEProjectLuaJITsrc>buildvm -m peobj -o lj_vm.obj 

D:UEProjectLuaJITsrc>buildvm -m bcdef -o lj_bcdef.h lib_base.c lib_math.c lib_bit.c lib_string.c lib_table.c lib_io.c lib_os.c lib_package.c lib_debug.c lib_jit.c lib_ffi.c 

D:UEProjectLuaJITsrc>buildvm -m ffdef -o lj_ffdef.h lib_base.c lib_math.c lib_bit.c lib_string.c lib_table.c lib_io.c lib_os.c lib_package.c lib_debug.c lib_jit.c lib_ffi.c 

D:UEProjectLuaJITsrc>buildvm -m libdef -o lj_libdef.h lib_base.c lib_math.c lib_bit.c lib_string.c lib_table.c lib_io.c lib_os.c lib_package.c lib_debug.c lib_jit.c lib_ffi.c 

D:UEProjectLuaJITsrc>buildvm -m recdef -o lj_recdef.h lib_base.c lib_math.c lib_bit.c lib_string.c lib_table.c lib_io.c lib_os.c lib_package.c lib_debug.c lib_jit.c lib_ffi.c 

D:UEProjectLuaJITsrc>buildvm -m vmdef -o jitvmdef.lua lib_base.c lib_math.c lib_bit.c lib_string.c lib_table.c lib_io.c lib_os.c lib_package.c lib_debug.c lib_jit.c lib_ffi.c 

D:UEProjectLuaJITsrc>buildvm -m folddef -o lj_folddef.h lj_opt_fold.c 

D:UEProjectLuaJITsrc>cl /nologo /c /O2 /W3 /D_CRT_SECURE_NO_DEPRECATE /D_CRT_STDIO_INLINE=__declspec(dllexport)__inline  /DLUAJIT_ENABLE_LUA52COMPAT /MD /DLUA_BUILD_AS_DLL lj_*.c lib_*.c 
lj_alloc.c
lj_api.c
lj_asm.c
lj_bc.c
lj_bcread.c
lj_bcwrite.c
lj_buf.c
lj_carith.c
lj_ccall.c
lj_ccallback.c
lj_cconv.c
lj_cdata.c
lj_char.c
lj_clib.c
lj_cparse.c
lj_crecord.c
lj_ctype.c
lj_debug.c
lj_dispatch.c
lj_err.c
Generating Code...
Compiling...
lj_ffrecord.c
lj_func.c
lj_gc.c
lj_gdbjit.c
lj_ir.c
lj_lex.c
lj_lib.c
lj_load.c
lj_mcode.c
lj_meta.c
lj_obj.c
lj_opt_dce.c
lj_opt_fold.c
lj_opt_loop.c
lj_opt_mem.c
lj_opt_narrow.c
lj_opt_sink.c
lj_opt_split.c
lj_parse.c
lj_profile.c
Generating Code...
Compiling...
lj_record.c
lj_snap.c
lj_state.c
lj_str.c
lj_strfmt.c
lj_strfmt_num.c
lj_strscan.c
lj_tab.c
lj_trace.c
lj_udata.c
lj_vmevent.c
lj_vmmath.c
lib_aux.c
lib_base.c
lib_base.c(304): warning C4146: unary minus operator applied to unsigned type, result still unsigned
lib_bit.c
lib_debug.c
lib_ffi.c
lib_init.c
lib_io.c
lib_jit.c
Generating Code...
Compiling...
lib_math.c
lib_os.c
lib_package.c
lib_string.c
lib_table.c
Generating Code...

D:UEProjectLuaJITsrc>link /nologo /release /DLL /out:lua51.dll lj_*.obj lib_*.obj 
   Creating library lua51.lib and object lua51.exp

D:UEProjectLuaJITsrc>if exist lua51.dll.manifest mt /nologo -manifest lua51.dll.manifest -outputresource:lua51.dll;2 

D:UEProjectLuaJITsrc>cl /nologo /c /O2 /W3 /D_CRT_SECURE_NO_DEPRECATE /D_CRT_STDIO_INLINE=__declspec(dllexport)__inline  /DLUAJIT_ENABLE_LUA52COMPAT luajit.c 
luajit.c

D:UEProjectLuaJITsrc>link /nologo /release /out:luajit.exe luajit.obj lua51.lib 
   Creating library luajit.lib and object luajit.exp

D:UEProjectLuaJITsrc>if exist luajit.exe.manifest mt /nologo -manifest luajit.exe.manifest -outputresource:luajit.exe 

=== Successfully built LuaJIT for Windows/x64 ===

xmake.lua如下

target('minilua')
    set_kind('binary')
    set_languages("c89", "cxx14")
    add_files("./host/minilua.c")

    add_defines("_CRT_SECURE_NO_DEPRECATE")
    add_defines("_CRT_STDIO_INLINE=__declspec(dllexport)__inline")
    add_defines("LUAJIT_ENABLE_LUA52COMPAT")

    after_build(
        function(target)
            os.trycp('build/windows/x64/release/minilua.exe', 'minilua.exe')
            local ret = os.exec('minilua.exe ./../dynasm/dynasm.lua -LN -D WIN -D JIT -D FFI -D P64 -o host/buildvm_arch.h ./vm_x64.dasc')
        end
    )

target('buildvm')
    set_kind('binary')
    set_languages("c89", "cxx14")

    add_files("./host/buildvm*.c")
    add_includedirs('./')
    add_includedirs('./../dynasm/')

    add_defines("_CRT_SECURE_NO_DEPRECATE")
    add_defines("_CRT_STDIO_INLINE=__declspec(dllexport)__inline")
    add_defines("LUAJIT_ENABLE_LUA52COMPAT")

    after_build(
        function(target)
            --run buildvm
            os.trycp('build/windows/x64/release/buildvm.exe', 'buildvm.exe')
            
            os.exec('buildvm -m peobj -o lj_vm.obj ')
            
            local all_lib = 'lib_base.c lib_math.c lib_bit.c lib_string.c lib_table.c lib_io.c lib_os.c lib_package.c lib_debug.c lib_jit.c lib_ffi.c'

            os.exec('buildvm -m bcdef -o lj_bcdef.h ' .. all_lib)
            os.exec('buildvm -m ffdef -o lj_ffdef.h ' .. all_lib)
            os.exec('buildvm -m libdef -o lj_libdef.h ' .. all_lib)
            os.exec('buildvm -m recdef -o lj_recdef.h ' .. all_lib)
            os.exec('buildvm -m vmdef -o jit/vmdef.lua ' .. all_lib)

            os.exec('buildvm -m folddef -o lj_folddef.h lj_opt_fold.c ')
        end
    )

target('LuaJIT')
    set_kind('shared')
    set_languages("c89", "cxx14")

    add_files('./lj_*.c', 'lib_*.c')
    add_includedirs('./')
    add_includedirs('./../dynasm/')

    add_links('lj_*.obj lib_*.obj')

    add_rules("mode.debug")

    add_cxflags('/nologo /c /O2 /W3 /MD')

    add_defines("_CRT_SECURE_NO_DEPRECATE")
    add_defines("_CRT_STDIO_INLINE=__declspec(dllexport)__inline")
    add_defines("LUAJIT_ENABLE_LUA52COMPAT")
    add_defines("LUA_BUILD_AS_DLL")