各位大佬请教一个配置msys2中工具链的问题

[StarryPortrait]

我使用msys安装了mingw-w64-ucrt-x86_64-toolchain与mingw-w64-x86_64-arm-none-eabi-toolchain这两个工具链。我的xmake.lua如下。我希望他在编译时使用ucrt-x86_64-toolchain，但他总是使用arm-none-eabi-toolchain。请问这该咋整

add_rules("mode.debug", "mode.release")

local sdkdir = {}
local bindir = {}

sdkdir.ucrt64 = "D:\\Scoop\\apps\\msys2\\current\\ucrt64"
bindir.ucrt64 = "D:\\Scoop\\apps\\msys2\\current\\ucrt64\\bin"

toolchain("ucrt64")
    set_kind("standalone")
    set_sdkdir(sdkdir.ucrt64)
    set_bindir(bindir.ucrt64)
    add_cflags("--sysroot="..sdkdir.ucrt64)
toolchain_end()

target("DataPackage")
    set_kind("binary")
    set_toolchains("ucrt64")
    add_files("src/*.c")

报错如下

error: D:/Scoop/apps/msys2/current/ucrt64/bin/../lib/gcc/arm-none-eabi/13.3.0/../../../../arm-none-eabi/bin/ld.exe: D:/Scoop/apps/msys2/current/ucrt64/bin/../lib/gcc/arm-none-eabi/13.3.0/../../../../arm-none-eabi/lib\libc.a(libc_a-exit.o): in function `exit':
C:\M\B\src\build-UCRT64\arm-none-eabi\newlib/../../../newlib-4.5.0.20241231/newlib/libc/stdlib/exit.c:65:(.text+0x28): undefined reference to `_exit'
D:/Scoop/apps/msys2/current/ucrt64/bin/../lib/gcc/arm-none-eabi/13.3.0/../../../../arm-none-eabi/bin/ld.exe: D:/Scoop/apps/msys2/current/ucrt64/bin/../lib/gcc/arm-none-eabi/13.3.0/../../../../arm-none-eabi/lib\libc.a(libc_a-closer.o): in function `_close_r':
C:\M\B\src\build-UCRT64\arm-none-eabi\newlib/../../../newlib-4.5.0.20241231/newlib/libc/reent/closer.c:47:(.text+0x18): undefined reference to `_close'
D:/Scoop/apps/msys2/current/ucrt64/bin/../lib/gcc/arm-none-eabi/13.3.0/../../../../arm-none-eabi/bin/ld.exe: D:/Scoop/apps/msys2/current/ucrt64/bin/../lib/gcc/arm-none-eabi/13.3.0/../../../../arm-none-eabi/lib\libc.a(libc_a-lseekr.o): in function `_lseek_r':
C:\M\B\src\build-UCRT64\arm-none-eabi\newlib/../../../newlib-4.5.0.20241231/newlib/libc/reent/lseekr.c:49:(.text+0x24): undefined reference to `_lseek'
D:/Scoop/apps/msys2/current/ucrt64/bin/../lib/gcc/arm-none-eabi/13.3.0/../../../../arm-none-eabi/bin/ld.exe: D:/Scoop/apps/msys2/current/ucrt64/bin/../lib/gcc/arm-none-eabi/13.3.0/../../../../arm-none-eabi/lib\libc.a(libc_a-readr.o): in function `_read_r':
C:\M\B\src\build-UCRT64\arm-none-eabi\newlib/../../../newlib-4.5.0.20241231/newlib/libc/reent/readr.c:49:(.text+0x24): undefined reference to `_read'
D:/Scoop/apps/msys2/current/ucrt64/bin/../lib/gcc/arm-none-eabi/13.3.0/../../../../arm-none-eabi/bin/ld.exe: D:/Scoop/apps/msys2/current/ucrt64/bin/../lib/gcc/arm-none-eabi/13.3.0/../../../../arm-none-eabi/lib\libc.a(libc_a-writer.o): in function `_write_r':
C:\M\B\src\build-UCRT64\arm-none-eabi\newlib/../../../newlib-4.5.0.20241231/newlib/libc/reent/writer.c:49:(.text+0x24): undefined reference to `_write'
D:/Scoop/apps/msys2/current/ucrt64/bin/../lib/gcc/arm-none-eabi/13.3.0/../../../../arm-none-eabi/bin/ld.exe: D:/Scoop/apps/msys2/current/ucrt64/bin/../lib/gcc/arm-none-eabi/13.3.0/../../../../arm-none-eabi/lib\libc.a(libc_a-sbrkr.o): in function `_sbrk_r':
C:\M\B\src\build-UCRT64\arm-none-eabi\newlib/../../../newlib-4.5.0.20241231/newlib/libc/reent/sbrkr.c:51:(.text+0x18): undefined reference to `_sbrk'
D:/Scoop/apps/msys2/current/ucrt64/bin/../lib/gcc/arm-none-eabi/13.3.0/../../../../arm-none-eabi/bin/ld.exe: D:/Scoop/apps/msys2/current/ucrt64/bin/../lib/gcc/arm-none-eabi/13.3.0/../../../../arm-none-eabi/lib\libc.a(libc_a-fstatr.o): in function `_fstat_r':
C:\M\B\src\build-UCRT64\arm-none-eabi\newlib/../../../newlib-4.5.0.20241231/newlib/libc/reent/fstatr.c:55:(.text+0x1c): undefined reference to `_fstat'
D:/Scoop/apps/msys2/current/ucrt64/bin/../lib/gcc/arm-none-eabi/13.3.0/../../../../arm-none-eabi/bin/ld.exe: D:/Scoop/apps/msys2/current/ucrt64/bin/../lib/gcc/arm-none-eabi/13.3.0/../../../../arm-none-eabi/lib\libc.a(libc_a-isattyr.o): in function `_isatty_r':
C:\M\B\src\build-UCRT64\arm-none-eabi\newlib/../../../newlib-4.5.0.20241231/newlib/libc/reent/isattyr.c:52:(.text+0x18): undefined reference to `_isatty'
collect2.exe: error: ld returned 1 exit status

当我将环境切换到ucrt64,然后编译还是会出现如上报错。但我去掉set_toolchains("ucrt64")则可正常编译。请问我该如何在不进入ucrt64的情况下使用ucrt-x86_64-toolchain进行编译

[waruqi]

为啥不直接用 msys2 ucrt 环境，啥也不用配，默认就是

指定sdk目录，也不需要自定义，看下交叉编译文档，原本就可以自动探测

https://xmake.io/zh/guide/basic-commands/cross-compilation.html

[waruqi]

mingw 平台是跟 mingw toolchain 绑定的，如果你没用 mingw toolchain 就不要指定 mingw 平台

既然你打算用 mingw 平台，那还去切 gcc 干嘛。 mingw toolchain 和 gcc toolchain 是完全不同的东西

windows 平台：默认 msvc，可以切 clang/clang-cl
mingw 平台： 默认 mingw toolchain ，且只能用这个 toolchain，可以通过 --sdk/--mingw 指定其他 mingw sdk
msys 平台： 默认用 msys + gcc
cross 平台：交叉编译，且可以切 --sdk/--cross

仔细看文档哈，不要瞎搞。

另外，xmake -vD 可以看编译命令的，自己对下

[waruqi]

另外，如果初学，不想趟坑，就老老实实从 msys2 官网下载安装，走 msys2 shell ucrt 环境，根本不需要折腾啥东西

@IIGS-A8825-D UCRT64 /d/projects/personal/xmake/tests/projects/c/console
$xmake -v
checking for gcc ... C:\msys64\usr\bin\gcc.exe
checking for the c compiler (cc) ... gcc.exe
checking for C:\msys64\usr\bin\gcc.exe ... c:\msys64\usr\bin\gcc.exe
checking for flags (-fPIC) ... ok
checking for flags (-O3) ... ok
checking for flags (-DNDEBUG) ... ok
checking for g++ ... C:\msys64\usr\bin\g++.exe
checking for the c++ compiler (cxx) ... g++.exe
[ 47%]: cache compiling.release src\main.c
C:\msys64\usr\bin\gcc.exe -c -m64 -fvisibility=hidden -O3 -DNDEBUG -o build\.objs\test\msys\x86_64\r
elease\src\main.c.o src\main.c
checking for flags (-MMD -MF) ... ok
checking for flags (-fdiagnostics-color=always) ... ok
checking for flags (-Wno-gnu-line-marker -Werror) ... ok
checking for g++ ... C:\msys64\usr\bin\g++.exe
checking for the linker (ld) ... g++.exe
checking for C:\msys64\usr\bin\g++.exe ... c:\msys64\usr\bin\g++.exe
checking for flags (-fPIC) ... ok
[ 71%]: linking.release test.exe
C:\msys64\usr\bin\g++.exe -o build\msys\x86_64\release\test.exe build\.objs\test\msys\x86_64\release
\src\main.c.o -m64 -s
[100%]: build ok, spent 4.859s

[StarryPortrait]

走 msys2 shell ucrt 环境可以正常编译，但在msys2 shell ucrt 环境之外他会探测使用arm-none-eabi-toolchain

[waruqi]

走 msys2 shell ucrt 环境可以正常编译，但在msys2 shell ucrt 环境之外他会探测使用arm-none-eabi-toolchain

那就要看你的环境，有没有全局设置 $CC $LD 环境变量了，不在 msys下，纯外部环境。xmake 不会去探测这种，除非被 $CC 给影响了。

[StarryPortrait]

好的。谢谢大佬🙏