libtool 2.4.7 needs to be backported to Jammy

[Kamila Szewczyk]

Hello.

I am a maintainer of the bzip3 statistical data compression program.

My software is currently being packaged for Homebrew, however, the reviewers found an issue caused by an outdated version of libtool in the Ubuntu Jammy which is fixed in new libtool versions (e.g. 2.4.7-5 on Debian Sid which I am using). The following patch to the `configure' file as generated using `libtool.m4' needs to be applied, since the logic in `libtool.m4' in this particular version is invalid:

--- a/configure.orig 2021-09-26 09:39:54.000000000 -0700
+++ b/configure 2021-09-26 09:40:56.000000000 -0700
@@ -8427,16 +8427,11 @@
       _lt_dar_allow_undefined='${wl}-undefined ${wl}suppress' ;;
     darwin1.*)
       _lt_dar_allow_undefined='${wl}-flat_namespace ${wl}-undefined ${wl}suppress' ;;
- darwin*) # darwin 5.x on
- # if running on 10.5 or later, the deployment target defaults
- # to the OS version, if on x86, and 10.4, the deployment
- # target defaults to 10.4. Don't you love it?
- case ${MACOSX_DEPLOYMENT_TARGET-10.0},$host in
- 10.0,*86*-darwin8*|10.0,*-darwin[91]*)
- _lt_dar_allow_undefined='${wl}-undefined ${wl}dynamic_lookup' ;;
- 10.[012]*)
+ darwin*)
+ case ${MACOSX_DEPLOYMENT_TARGET},$host in
+ 10.[012],*|,*powerpc*)
    _lt_dar_allow_undefined='${wl}-flat_namespace ${wl}-undefined ${wl}suppress' ;;
- 10.*)
+ *)
    _lt_dar_allow_undefined='${wl}-undefined ${wl}dynamic_lookup' ;;
       esac
     ;;

Furthermore, we are compelled to use Ubuntu Jammy (I would have upgraded otherwise), but Github Actions hosted runners do not support it, so us and other maintainers who don't keep generated `configure' files in the source code trunk would be very thankful for this backport.

Yours, Kamila Szewczyk