[PATCH] build-aux: use GNU sed for syntax-check on FreeBSD

[Daniel P. Berrangé]

On Wed, Aug 05, 2020 at 08:02:41PM +0400, Roman Bogorodskiy wrote:
> BSD sed(1) and GNU sed(1) syntax are not compatible, and as
> syntax-check.mk uses the GNU flavor, set SED variable to
> 'gsed' by default.
> 
> Signed-off-by: Roman Bogorodskiy <bogorodskiy at gmail.com>
> ---
>  build-aux/syntax-check.mk | 8 ++++++++
>  1 file changed, 8 insertions(+)
> 
> I'm not sure if this requires a more comprehensive solution.
> I have mixed feeling about this. If we try to just use gsed like in this
> patch, it'll fail because we don't require gsed to be installed.
> 
> OTOH, an alternative solution like checking for gsed in meson.build,
> and probably even generation of some files with variables to be sourced
> by .mk files feels like too much of a hassle, esp. in this context.

I think that's likely overkill for this usage.

> 
> diff --git a/build-aux/syntax-check.mk b/build-aux/syntax-check.mk
> index 6eb59cf90e..bbfcb63152 100644
> --- a/build-aux/syntax-check.mk
> +++ b/build-aux/syntax-check.mk
> @@ -28,7 +28,15 @@ ME := build-aux/syntax-check.mk
>  # ignoring the module description.
>  AWK ?= awk
>  GREP ?= grep
> +# FreeBSD (and probably some other OSes too) ships own version of sed(1), not
> +# compatible with the GNU sed. GNU sed is available as gsed(1), so use this
> +# instead
> +UNAME := $(shell uname)
> +ifeq ($(UNAME),FreeBSD)
> +SED ?= gsed
> +else
>  SED ?= sed
> +endif

Reviewed-by: Daniel P. Berrangé <berrange at redhat.com>


Regards,
Daniel
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