Re: [PATCH] meson: Set implicit_include_directories to false

[Katsuhiro Ueno]

2021-04-30 16:48 Paolo Bonzini <pbonzini@redhat.com>:
>
> On 29/04/21 04:43, Katsuhiro Ueno wrote:
> > Without this, libvixl cannot be compiled with macOS 11.3 SDK due to
> > include file name conflict (usr/include/c++/v1/version conflicts with
> > VERSION).
> >
> > Signed-off-by: Katsuhiro Ueno <uenobk@gmail.com>
> > ---
> >   meson.build | 1 +
> >   1 file changed, 1 insertion(+)
> >
> > diff --git a/meson.build b/meson.build
> > index c6f4b0cf5e..d007bff8c3 100644
> > --- a/meson.build
> > +++ b/meson.build
> > @@ -2129,6 +2129,7 @@ common_all = common_ss.apply(config_all, strict: 
> > false)
> >   common_all = static_library('common',
> >                               build_by_default: false,
> >                               sources: common_all.sources() + genh,
> > +                            implicit_include_directories: false,
> >                               dependencies: common_all.dependencies(),
> >                               name_suffix: 'fa')
> >
>
> Can you include the difference in the include paths (the -I and -iquote
> arguments)?  There are many cases in which we rely on having the current
> source directory in the build path, for example all inclusions of "trace.h".

This only removes -I.. (current (top-level) source directory) from the
arguments. The meson manual says that it also removes -I. (current
(top-level) build directory) but -I. is still in the arguments (I am
not sure why). This does not change any -iquote argument.

As far as I know, this does not affect the inclusions of "trace.h"
because each "trace.h" is in the same directory as the files that
include it, and the top-level build directory, which has the "trace"
directory containing generated "trace-*.h" files, is still in the
include path.

--
Katsuhiro Ueno