使用arm-v8架构的芯片，通过meson编译mesa，指定clang编译链报错“can not compile programs”

【问题描述】

使用arm-v8架构的芯片，编译mesa（使用的meson编译框架），部分配置如下：

c_args = [ '-march=armv8-a', '-mfloat-abi=softfp', '-mtune=generic-armv8-a', '-mfpu=neon', '-mthumb', '--target= aarch64-unknown-linux-ohos', '--sysroot=/xxx/third_party/musl', '-fPIC']

[binaries] c = '/xx/llvm/bin/aarch64-unknown-linux-ohos-clang' cpp = '/xx/llvm/bin/aarch64-unknown-linux-ohos-clang++' ar = '/xx/llvm/bin/llvm-ar' strip = '/xx/llvm/bin/llvm-strip' ld = '/xx/llvm/bin/ld.lld' pkgconfig = '/usr/bin/pkg-config'

但是会报错如下：

meson.build:21:0: ERROR: Compiler /xx/llvm/bin/aarch64-unknown-linux-ohos-clang can not compile programs.