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Bug#1062399: liblip: NMU diff for 64-bit time_t transition



Source: liblip
Version: 2.0.0-2
Severity: serious
Tags: patch pending
Justification: library ABI skew on upgrade
User: debian-arm@lists.debian.org
Usertags: time-t

Dear maintainer,

As part of the 64-bit time_t transition required to support 32-bit
architectures in 2038 and beyond
(https://wiki.debian.org/ReleaseGoals/64bit-time), we have identified
liblip as a source package shipping runtime libraries whose ABI
either is affected by the change in size of time_t, or could not be
analyzed via abi-compliance-checker (and therefore to be on the safe
side we assume is affected).

To ensure that inconsistent combinations of libraries with their
reverse-dependencies are never installed together, it is necessary to
have a library transition, which is most easily done by renaming the
runtime library package.

Since turning on 64-bit time_t is being handled centrally through a change
to the default dpkg-buildflags (https://bugs.debian.org/1037136), it is
important that libraries affected by this ABI change all be uploaded close
together in time.  Therefore I have prepared a 0-day NMU for liblip
which will initially be uploaded to experimental if possible, then to
unstable after packages have cleared binary NEW.

Please find the patch for this NMU attached.

If you have any concerns about this patch, please reach out ASAP.  Although
this package will be uploaded to experimental immediately, there will be a
period of several days before we begin uploads to unstable; so if information
becomes available that your package should not be included in the transition,
there is time for us to amend the planned uploads.



-- System Information:
Debian Release: trixie/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (500, 'testing'), (1, 'experimental')
Architecture: amd64 (x86_64)

Kernel: Linux 6.5.0-14-generic (SMP w/12 CPU threads; PREEMPT)
Kernel taint flags: TAINT_PROPRIETARY_MODULE, TAINT_OOT_MODULE
Locale: LANG=C, LC_CTYPE=C.UTF-8 (charmap=UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
diff -Nru liblip-2.0.0/debian/changelog liblip-2.0.0/debian/changelog
--- liblip-2.0.0/debian/changelog	2023-08-09 15:43:43.000000000 +0000
+++ liblip-2.0.0/debian/changelog	2024-02-01 09:23:30.000000000 +0000
@@ -1,3 +1,10 @@
+liblip (2.0.0-2.1) experimental; urgency=medium
+
+  * Non-maintainer upload.
+  * Rename libraries for 64-bit time_t transition.
+
+ -- Steve Langasek <vorlon@debian.org>  Thu, 01 Feb 2024 09:23:30 +0000
+
 liblip (2.0.0-2) unstable; urgency=medium
 
   * QA upload.
diff -Nru liblip-2.0.0/debian/control liblip-2.0.0/debian/control
--- liblip-2.0.0/debian/control	2023-08-09 15:43:43.000000000 +0000
+++ liblip-2.0.0/debian/control	2024-02-01 09:23:30.000000000 +0000
@@ -6,7 +6,10 @@
 Homepage: http://www.deakin.edu.au/~gleb/lip.html
 Standards-Version: 3.7.2
 
-Package: liblip2
+Package: liblip2t64
+Provides: ${t64:Provides}
+Replaces: liblip2
+Breaks: liblip2 (<< ${source:Version})
 Section: libs
 Priority: optional
 Architecture: any
@@ -59,7 +62,7 @@
 Section: libdevel
 Priority: optional
 Architecture: any
-Depends: ${shlibs:Depends}, libtnt-dev, liblip2 (= ${binary:Version})
+Depends: ${shlibs:Depends}, libtnt-dev, liblip2t64 (= ${binary:Version})
 Description: reliable interpolation of multivariate scattered data
  Lip interpolates scattered multivariate data with a Lipschitz function.
  .
diff -Nru liblip-2.0.0/debian/liblip2t64.lintian-overrides liblip-2.0.0/debian/liblip2t64.lintian-overrides
--- liblip-2.0.0/debian/liblip2t64.lintian-overrides	1970-01-01 00:00:00.000000000 +0000
+++ liblip-2.0.0/debian/liblip2t64.lintian-overrides	2024-02-01 09:23:30.000000000 +0000
@@ -0,0 +1 @@
+liblip2t64: package-name-doesnt-match-sonames liblip2
diff -Nru liblip-2.0.0/debian/rules liblip-2.0.0/debian/rules
--- liblip-2.0.0/debian/rules	2023-08-09 15:43:43.000000000 +0000
+++ liblip-2.0.0/debian/rules	2024-02-01 09:23:30.000000000 +0000
@@ -30,7 +30,7 @@
 	-rm -f `find . -name "*~"`
 	-rm -rf tnt shared static
 	-rm -rf debian/tmp debian/files* core debian/substvars debian/debhelper.log
-	-rm -rf debian/liblip2 debian/liblip-dev
+	-rm -rf debian/liblip2t64 debian/liblip-dev
 
 binary-indep: checkroot build
 	$(checkdir)
@@ -39,18 +39,18 @@
 binary-arch: checkroot build
 	$(checkdir)
 	-rm -rf debian/tmp
-	-rm -rf debian/liblip2 debian/liblip-dev
-	install -d debian/tmp/DEBIAN debian/liblip2/usr/share/doc/liblip2/examples
-	cd debian && install -d liblip2 liblip-dev
-	cd debian/liblip2    && install -d DEBIAN usr/share/doc usr/lib/lip
+	-rm -rf debian/liblip2t64 debian/liblip-dev
+	install -d debian/tmp/DEBIAN debian/liblip2t64/usr/share/doc/liblip2t64/examples
+	cd debian && install -d liblip2t64 liblip-dev
+	cd debian/liblip2t64    && install -d DEBIAN usr/share/doc usr/lib/lip
 	cd debian/liblip-dev && install -d DEBIAN usr/share/doc usr/lib/lip usr/include/lip
 
-	cd debian && install -m 644 shlibs liblip2/DEBIAN
+	cd debian && install -m 644 shlibs liblip2t64/DEBIAN
 
 	cd shared/lib && $(STRIP) --strip-unneeded liblip.so.2.0.0
 	cd static/lib && strip --strip-debug liblip.a
 
-	mv shared/lib/liblip.so.* debian/liblip2/usr/lib/lip
+	mv shared/lib/liblip.so.* debian/liblip2t64/usr/lib/lip
 	mv shared/lib/liblip.so debian/liblip-dev/usr/lib/lip	
 	sed "s/^libdir=.*/libdir=\'\/usr\/lib\/lip\'/" shared/lib/liblip.la > debian/liblip-dev/usr/lib/lip/liblip.la
 	mv static/lib/liblip.a debian/liblip-dev/usr/lib/lip	
@@ -60,23 +60,23 @@
 	mv static/include/memblock.h debian/liblip-dev/usr/include/lip
 	chmod +r debian/liblip-dev/usr/include/lip/*
 
-	cp -p debian/copyright debian/liblip2/usr/share/doc/liblip2
-	cp -p debian/changelog debian/liblip2/usr/share/doc/liblip2/changelog.Debian
-	cp -p docs/* debian/liblip2/usr/share/doc/liblip2/
-	cp -p examples/example* debian/liblip2/usr/share/doc/liblip2/examples
-	cp -p examples/Makefile debian/liblip2/usr/share/doc/liblip2/examples
-	cd debian/liblip2/usr/share/doc/liblip2 && gzip -9n changelog.Debian examples/*
-
-	ln -s liblip2 debian/liblip-dev/usr/share/doc/liblip-dev
-
-	dpkg-shlibdeps debian/liblip2/usr/lib/lip/*
-	dpkg-gencontrol -isp -pliblip2 -Pdebian/liblip2
-	cd debian/liblip2 && find * -type f ! -regex "DEBIAN/.*" -print0 |\
+	cp -p debian/copyright debian/liblip2t64/usr/share/doc/liblip2t64
+	cp -p debian/changelog debian/liblip2t64/usr/share/doc/liblip2t64/changelog.Debian
+	cp -p docs/* debian/liblip2t64/usr/share/doc/liblip2t64/
+	cp -p examples/example* debian/liblip2t64/usr/share/doc/liblip2t64/examples
+	cp -p examples/Makefile debian/liblip2t64/usr/share/doc/liblip2t64/examples
+	cd debian/liblip2t64/usr/share/doc/liblip2t64 && gzip -9n changelog.Debian examples/*
+
+	ln -s liblip2t64 debian/liblip-dev/usr/share/doc/liblip-dev
+
+	dpkg-shlibdeps debian/liblip2t64/usr/lib/lip/*
+	dpkg-gencontrol -isp -pliblip2t64 -Pdebian/liblip2t64
+	cd debian/liblip2t64 && find * -type f ! -regex "DEBIAN/.*" -print0 |\
 	LC_ALL=C sort -z | xargs -0r md5sum > DEBIAN/md5sums
-	chown -R root.root debian/liblip2
-	chmod -x debian/liblip2/usr/lib/lip/*
-	chmod -R go=rX debian/liblip2
-	dpkg --build debian/liblip2 ..
+	chown -R root.root debian/liblip2t64
+	chmod -x debian/liblip2t64/usr/lib/lip/*
+	chmod -R go=rX debian/liblip2t64
+	dpkg --build debian/liblip2t64 ..
 
 	dpkg-gencontrol -isp -pliblip-dev -Pdebian/liblip-dev
 	cd debian/liblip-dev && find * -type f ! -regex "DEBIAN/.*" -print0 |\

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