Subject: Re: bug#61988: error compiling emacs

From: Ugo Tomei <[email-masked]>
Date: Wed, 8 Mar 2023 13:26:28 +0100

hi,

pkg-config/kinetic,now 0.29.2-1ubuntu3 amd64 [installato]

with this patch compile well:

lrwxrwxrwx 1 root root 13 mar  8 13:25 /usr/local/bin/emacs -> emacs-30.0.50

attached log and configure.ac

thanks, best regards

Il 08/03/23 11:42, Po Lu ha scritto:
> What if you try this instead?
>
> diff --git a/configure.ac b/configure.ac
> index bc7e61048c3..ac93d003b70 100644
> --- a/configure.ac
> +++ b/configure.ac
> @@ -2806,6 +2806,25 @@ AC_DEFUN
>         WEBP_MODULE="libwebpdemux >= $WEBP_REQUIRED"
>   
>         EMACS_CHECK_MODULES([WEBP], [$WEBP_MODULE])
> +
> +      # WebPGetInfo is sometimes not present inside libwebpdemux, so
> +      # if it does not link, also check for libwebpdecoder.
> +
> +      OLD_CFLAGS=$CFLAGS
> +      OLD_LIBS=$LIBS
> +      CFLAGS="$CFLAGS $WEBP_CFLAGS"
> +      LIBS="$LIBS $WEBP_LIBS"
> +
> +      AC_CHECK_FUNC([WebPGetInfo], [],
> +        [WEBP_MODULE="$WEBP_MODULE libwebpdecoder >= $WEBP_REQUIRED"
> +	 HAVE_WEBP=no
> +	 AS_UNSET([WEBP_LIBS])
> +	 AS_UNSET([WEBP_CFLAGS])
> +	 EMACS_CHECK_MODULES([WEBP], [$WEBP_MODULE])])
> +
> +      CFLAGS=$OLD_CFLAGS
> +      LIBS=$OLD_LIBS
> +
>         AC_SUBST([WEBP_CFLAGS])
>         AC_SUBST([WEBP_LIBS])
>      fi
>
> I'm not sure what pkg-config is doing here TBH, but it isn't very
> intuitive.