[Buildroot] [PATCHv4 15/16] package/pkg-meson.mk: determine 'buildtype' based on BR2_ENABLE_RUNTIME_DEBUG iso BR2_ENABLE_DEBUG

[Yann E. MORIN <yann.morin.1998@free.fr>]

Thomas, All,

Eric, and other meson experts: question for you below...

On 2021-06-01 16:34 +0200, Thomas De Schampheleire spake thusly:
> From: Thomas De Schampheleire <thomas.de_schampheleire@nokia.com>
> 
> BR2_ENABLE_DEBUG should just steer the availability of debug symbols and
> should have no negative effect on performance.
> 
> Introduction of 'assert' statements, 'debug'-type builds with additional
> logging, etc. should be steered by BR2_ENABLE_RUNTIME_DEBUG instead.
> 
> Signed-off-by: Thomas De Schampheleire <thomas.de_schampheleire@nokia.com>
> ---
>  package/pkg-meson.mk | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/package/pkg-meson.mk b/package/pkg-meson.mk
> index a57820d4d2..dafad3b1eb 100644
> --- a/package/pkg-meson.mk
> +++ b/package/pkg-meson.mk
> @@ -89,7 +89,7 @@ define $(2)_CONFIGURE_CMDS
>  		--prefix=/usr \
>  		--libdir=lib \
>  		--default-library=$(if $(BR2_STATIC_LIBS),static,shared) \
> -		--buildtype=$(if $(BR2_ENABLE_DEBUG),debug,release) \
> +		--buildtype=$(if $(BR2_ENABLE_RUNTIME_DEBUG),debug,release) \

I agree on this specific change.

However, more globally: 'buildtype' governs two settings [0]: 'debug'
and 'optimisation'. The 'optimisation' part is already part of our
CFLAGS, so we don't need to drive it from meson.

So, I think that what we need, is to just set the 'debug' option, rather
than the full 'buildtype'.

Thoughts?

[0] https://mesonbuild.com/Builtin-options.html#core-options

>  		--cross-file=$$($$(PKG)_SRCDIR)/build/cross-compilation.conf \
>  		-Dstrip=false \
>  		-Dbuild.pkg_config_path=$$(HOST_DIR)/lib/pkgconfig \
> -- 
> 2.26.3
> 
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