[ITA] libsigc3.0

[Brian Inglis]

On 2025-06-06 12:55, Jon Turney via Cygwin-apps wrote:
> On 27/05/2025 17:25, Philippe Baril Lecavalier via Cygwin-apps wrote:
>> libsigc3.0 3.0.3 (2020) -> 3.6.0 (2023)

>> Similar business to libsigc2.0, another parallel-installable ABI. Same issue 
>> with Doxygen but we have established a decent workaround. I thought I tested 
>> and sorted it out a while ago, turned out I missed a subtle difference in docs 
>> path vs 2.0, hence hanging build with scallywag.

>> #SRC_URI="https://github.com/libsigcplusplus/libsigcplusplus/releases/ 
>> download/${VERSION}/${ORIG_PN}-${VERSION}.tar.xz"

For flexibility, I tend to prefer definitions such as:

	NAME=libsigc++3		# should? be a constant never an expression
	FULL=${NAME%[0-9]*}	# or PRETTY=
	BASE=${FULL%++*}
	BASEVER=${VERSION%%.[0-9]*}
	PROJECT=${BASE}plusplus	# or ${FULL//+/plus}
	REL_DL=releases/download
	...

then use, for example:

	SRC_URI=https://github.com/$PROJECT/$PROJECT/$REL_DL/$VERSION/$FULL-$VERSION

	declare ${BASE}${BASE_VER}_CONTENTS=...

YMMV

Also prefer, for example:

	sed -e 's/\(DOT_NUM_THREADS\)\s*=\s*0/\1=1/' -- \

possibly with extra \s* at start and finish of RE, to allow for space 
differences in other releases?

> Since the source is available from download.gnome.org, this line can be removed, 
> rather than being commented out.
From:

	https://libsigcplusplus.github.io/libsigcplusplus/download.html

"Download

Source Packages

The source packages are available from
GitHub releases (*since* 2.10.1 and 3.0.0) and from the
GNOME download site (*until* 2.12.1 and 3.6.0)."

so, as Gnome downloads are finished, go with GitHub for future compatibility.

-- 
Take care. Thanks, Brian Inglis              Calgary, Alberta, Canada

La perfection est atteinte                   Perfection is achieved
non pas lorsqu'il n'y a plus rien à ajouter  not when there is no more to add
mais lorsqu'il n'y a plus rien à retrancher  but when there is no more to cut
                                 -- Antoine de Saint-Exupéry