[PATCH 01/19] build-sys: drop -Winline

marcandre.lureau@redhat.com posted 19 patches 7 months, 1 week ago
There is a newer version of this series
[PATCH 01/19] build-sys: drop -Winline
Posted by marcandre.lureau@redhat.com 7 months, 1 week ago
From: Marc-André Lureau <marcandre.lureau@redhat.com>

The warning is triggered when compiling with various build options, such
as -Doptimization=g.

From gcc(1) man page about -Winline:
seemingly insignificant changes in the source program can cause the warnings produced by -Winline to appear or disappear.

Such flaky behaviour is best left to the user discretion.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
---
 meson.build | 1 -
 1 file changed, 1 deletion(-)

diff --git a/meson.build b/meson.build
index c7e5947d10..15f5a0fe74 100644
--- a/meson.build
+++ b/meson.build
@@ -340,7 +340,6 @@ cc_flags += [
   '-Wimplicit-int',
   '-Wincompatible-pointer-types',
   '-Winit-self',
-  '-Winline',
   '-Wint-conversion',
   '-Wint-in-bool-context',
   '-Wint-to-pointer-cast',
-- 
2.47.0
Re: [PATCH 01/19] build-sys: drop -Winline
Posted by Daniel P. Berrangé 6 months, 4 weeks ago
On Wed, Jan 29, 2025 at 05:40:23PM +0400, marcandre.lureau@redhat.com wrote:
> From: Marc-André Lureau <marcandre.lureau@redhat.com>
> 
> The warning is triggered when compiling with various build options, such
> as -Doptimization=g.
> 
> From gcc(1) man page about -Winline:
> seemingly insignificant changes in the source program can cause the warnings produced by -Winline to appear or disappear.
> 
> Such flaky behaviour is best left to the user discretion.

IME it is not nearly as unreliable as that man page suggests. We have
used '-Winline' by default for 18 years now with no significant reports
of trouble before now that I recall, and IMHO it is useful to flag cases
where contributors add pointless 'inline' annotations.

If 'g' is known to create trouble though  we could add a check for
get_option('optimization') == 'g' and add -Wno-inline to override
our default falgs.

> 
> Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
> ---
>  meson.build | 1 -
>  1 file changed, 1 deletion(-)
> 
> diff --git a/meson.build b/meson.build
> index c7e5947d10..15f5a0fe74 100644
> --- a/meson.build
> +++ b/meson.build
> @@ -340,7 +340,6 @@ cc_flags += [
>    '-Wimplicit-int',
>    '-Wincompatible-pointer-types',
>    '-Winit-self',
> -  '-Winline',
>    '-Wint-conversion',
>    '-Wint-in-bool-context',
>    '-Wint-to-pointer-cast',
> -- 
> 2.47.0
> 

With regards,
Daniel
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