How to get rid of WARNING: Consider using the built-in warning_level option instead of using "-Wall".

[ilg-ul]

I'm getting this warning, but I could not find a way to set the warning_level.

My project builds multi-platform tests, and I cannot add it to the top project() since I need to enable it only for some platforms.

Is there any way to set it programatically? Or via an entry in the cross.ini, which, in my case, is defined for each platform.

[eli-schwartz]

Or via an entry in the cross.ini, which, in my case, is defined for each platform.

Yes, you can: https://mesonbuild.com/Machine-files.html#meson-builtin-options

[built-in options]
warning_level = '0'

[ravisynapse]

@eli-schwartz @tabedzki @rusty-snake Can we explicitly add wall in in meson build file ? I heard that -Wall is default enabled in Meson build system .arm-ilo7-linux-gnueabi-gcc is the compiler. Any flags passed to the compiler should appear explicitly on command line. But don't see "-Wall".
Generate build by explicitly passing "-Wall" to gcc. Compare the build log w/ and w/o passing "-Wall" explicitly.
I am facing compiler parse error when I pass -Wall option

[andy5995]

@eli-schwartz @tabedzki @rusty-snake Can we explicitly add wall in in meson build file ? I heard that -Wall is default enabled in Meson build system .arm-ilo7-linux-gnueabi-gcc is the compiler. Any flags passed to the compiler should appear explicitly on command line. But don't see "-Wall".
Generate build by explicitly passing "-Wall" to gcc. Compare the build log w/ and w/o passing "-Wall" explicitly.
I am facing compiler parse error when I pass -Wall option

@ravisynapse Here's an example of how to explicitly add a flag is in https://github.com/theimpossibleastronaut/rmw/blob/998a405d4325385113eb2d2966581d658c74e1b4/meson.build#L9-L26

[ravisynapse]

@andy5995 .From my experiment found that -Wall is not enabled in meson .As per the meson document says -Wall is default enabled in meson build system .But I don't see it during the compile time .
Can you please help me to enable -Wall in meson ?

Thank you ,
Ravi

[andy5995]

@ravisynapse If you don't see '-Wall' during compile time, in your build directory, run ninja clean then ninja -v.

if no 'warning_level' is specified as a keyword arg to 'default_options', then 'warning_level' defaults to 1, which will add the '-Wall' option.

project(
  'rmw',
  'c',
  version: '0.8.1.555',
  meson_version : '>= 0.56.0',
  default_options: ['warning_level=3']
  )

Please zip the 'compile_commands.json' file in your build directory and attach it to your reply.

Also copy and paste in your 'meson.build'.

[andy5995]

yocto framework with bitbake

@ravisynapse I have never heard of those before and don't know anything about them. And you didn't attach the compile_commands.json file like I asked you too.