clang-cl warning: argument unused during compilation: '-O0'

[Latias94]

Xmake Version

xmake v2.7.1+dev.1bf418b74

Operating System Version and Architecture

win10

Describe Bug

❯ xmake create test     
create test ...
  [+]: src\main.cpp
  [+]: xmake.lua
  [+]: .gitignore
create ok!

Administrator in D:\cpp
❯ cd .\test\

Administrator in D:\cpp\test via 🌙 
❯ xmake f --cc=clang-cl --cxx=clang-cl -m debug
checking for platform ... windows
checking for architecture ... x64
checking for Microsoft Visual Studio (x64) version ... 2022

Administrator in D:\cpp\test via 🌙 
❯ xmake -rvD
checking for clang-cl ... ok
checking for flags (-FS -Fd) ... ok
> clang-cl "-FS" "-FdC:\Users\ADMINI~1\AppData\Local\Temp\.xmake\220913\_FE7A6793777E46208270A4829AA77040.pdb"
checking for flags (-O0) ... ok
> clang-cl "-O0"
[ 25%]: cache compiling.debug src\main.cpp
clang-cl -c -Zi -FS -Fdbuild\windows\x64\debug\compile.test.pdb -O0 -Fobuild\.objs\test\windows\x64\debug\src\main.cpp.obj src\main.cpp
checking for flags (-fcolor-diagnostics) ... ok
> clang-cl "-fcolor-diagnostics"
clang-cl: warning: argument unused during compilation: '-O0' [-Wunused-command-line-argument]
[ 50%]: linking.debug test.exe
"C:\\Program Files\\Microsoft Visual Studio\\2022\\Community\\VC\\Tools\\MSVC\\14.33.31629\\bin\\HostX64\\x64\\link.exe" -nologo -dynamicbase -nxcompat -machine:x64 -debug -pdb:build\windows\x64\debug\test.pdb -out:build\windows\x64\debug\test.exe build\.objs\test\windows\x64\debug\src\main.cpp.obj

build cache stats:
cache directory: build\.build_cache
cache hit rate: 0%
cache hit: 0
cache miss: 0
new cached files: 0
remote cache hit: 0
remote new cached files: 0
preprocess failed: 0
compile fallback count: 0

[100%]: build ok!

Expected Behavior

no warning

Project Configuration

No response

Additional Information and Error Logs

No response

[waruqi]

I haven't fixed it yet, but I don't think it should be a problem.

[Latias94]

Nevermind, I just don't like warnings.

[Latias94]

warning occur again

xmake update dev
xmake -rvD
...
clang-cl: warning: argument unused during compilation: '-O3' [-Wunused-command-line-argument]

[waruqi]

I cannot remove it, xmake doesn't know when clang-cl actually uses which parameters, but you can configure the suppression warnings yourself.

you can use add_cxflags("-Wno-error=unused-command-line-argument"), or -Wno-unused-command-line-argument to suppress it.

or try set_warnings("none")

[Latias94]

ok

[waruqi]

I removed it, try it again. xmake update -s dev