hi, pkg-config/kinetic,now 0.29.2-1ubuntu3 amd64 [installato] with this patch compile well: lrwxrwxrwx 1 root root 13 marĀ  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.