[Buildroot] [PATCHv2] meson: add per package optional compiler/linker flags

[Yann E. MORIN]

Thomas, All,

On 2019-06-23 12:36 +0200, Thomas Petazzoni spake thusly:
> On Sat, 22 Jun 2019 22:20:46 +0200
> "Yann E. MORIN" <yann.morin.1998 at free.fr> wrote:
> 
> Perhaps the commit should explain that as of today, Meson doesn't allow
> to pass cflags/ldflags on the command line when a cross-compilation
> file is used.

Indeed.

[--SNIP--]
> > +* +FOO_CFLAGS+, to specify compiler arguments added to the package specific
> > +  +cross-compile.conf+ file +c_args+ property. By default, empty, so that
> > +  the global +TARGET_CFLAGS+ are used.
> 
> I find the wording "By default, empty, so that the global
> +TARGET_CFLAGS+ are used" very confusing. Indeed, by default, those
> variables are not empty, they are precisely defined to TARGET_CFLAGS.
> 
> For example, in the autotools infra documentation, we say:
> 
> * +LIBFOO_AUTORECONF+, tells whether the package should
>   be autoreconfigured or not (i.e. if the configure script and
>   Makefile.in files should be re-generated by re-running autoconf,
>   automake, libtool, etc.). Valid values are +YES+ and
>   +NO+. By default, the value is +NO+
> 
> So we just say that the default value is NO, not that it is empty and
> that NO is used :)
> 
> For extra clarity, it could be rephrased like this:
> 
> 	When no value is specified by the package for this variable,
> 	the value of +TARGET_CFLAGS+ will be used by the
> 	+meson-package+ infrastructure.

Yes, that makes sense.

Regards,
Yann E. MORIN.

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