FTBFS in resolute: sbuild-build-depends-main-dummy:amd64 Depends libgwengui-qt5-dev

[Mitsuya Shibata]

Mozc (2.29.5160.102+dfsg-1.4ubuntu3) is currently failing to build from source (FTBFS) on resolute. As a result, there are no Mozc related packages in the repository.

https://launchpadlibrarian.net/846489822/buildlog_ubuntu-resolute-amd64.mozc_2.29.5160.102+dfsg-1.4ubuntu3_BUILDING.txt.gz

---
E: Unable to satisfy dependencies. Reached two conflicting assignments:
   1. sbuild-build-depends-main-dummy:amd64=0.invalid.0 is selected for install
   2. sbuild-build-depends-main-dummy:amd64 Depends libgwengui-qt5-dev
      but none of the choices are installable:
      [no choices]
---

In libgwengui-qt5-dev, the package name changed because it transitioned from Qt5 to Qt6.

https://salsa.debian.org/aqbanking-team/pkg-libgwenhywfar/-/commit/538f453cfa19c042e87d39af4c62ec2490c82c33

However, it looks like the current Mozc no longer uses libgwengui, so it might be enough to simply remove it from Build-Depends.

[Mitsuya Shibata (cosmos-door)]

If I remove libgqengui-qt5-dev from debian/control, I get an error like this.

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/usr/bin/x86_64-linux-gnu-ld.bfd: cannot find -labsl_string_view: No such file or directory
/usr/bin/x86_64-linux-gnu-ld.bfd: cannot find -labsl_random_internal_pool_urbg: No such file or directory
---

It seems that even if I install libabsl-dev, it does not create files like libabsl_string_view.so.

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$ ls -l /usr/lib/x86_64-linux-gnu/libabsl_string*
lrwxrwxrwx 1 root root 35 Sep 18 23:46 /usr/lib/x86_64-linux-gnu/libabsl_string_view.so.20240722 -> libabsl_string_view.so.20240722.0.0
-rw-r--r-- 1 root root 14584 Sep 18 23:46 /usr/lib/x86_64-linux-gnu/libabsl_string_view.so.20240722.0.0
-rw-r--r-- 1 root root 243932 Feb 1 18:27 /usr/lib/x86_64-linux-gnu/libabsl_strings.a
lrwxrwxrwx 1 root root 27 Feb 1 18:27 /usr/lib/x86_64-linux-gnu/libabsl_strings.so -> libabsl_strings.so.20260107
lrwxrwxrwx 1 root root 31 Sep 18 23:46 /usr/lib/x86_64-linux-gnu/libabsl_strings.so.20240722 -> libabsl_strings.so.20240722.0.0
-rw-r--r-- 1 root root 129344 Sep 18 23:46 /usr/lib/x86_64-linux-gnu/libabsl_strings.so.20240722.0.0
lrwxrwxrwx 1 root root 31 Feb 1 18:27 /usr/lib/x86_64-linux-gnu/libabsl_strings.so.20260107 -> libabsl_strings.so.20260107.0.0
-rw-r--r-- 1 root root 145728 Feb 1 18:27 /usr/lib/x86_64-linux-gnu/libabsl_strings.so.20260107.0.0
-rw-r--r-- 1 root root 17182 Feb 1 18:27 /usr/lib/x86_64-linux-gnu/libabsl_strings_internal.a
lrwxrwxrwx 1 root root 36 Feb 1 18:27 /usr/lib/x86_64-linux-gnu/libabsl_strings_internal.so -> libabsl_strings_internal.so.20260107
lrwxrwxrwx 1 root root 40 Sep 18 23:46 /usr/lib/x86_64-linux-gnu/libabsl_strings_internal.so.20240722 -> libabsl_strings_internal.so.20240722.0.0
-rw-r--r-- 1 root root 18832 Sep 18 23:46 /usr/lib/x86_64-linux-gnu/libabsl_strings_internal.so.20240722.0.0
lrwxrwxrwx 1 root root 40 Feb 1 18:27 /usr/lib/x86_64-linux-gnu/libabsl_strings_internal.so.20260107 -> libabsl_strings_internal.so.20260107.0.0
-rw-r--r-- 1 root root 18832 Feb 1 18:27 /usr/lib/x86_64-linux-gnu/libabsl_strings_internal.so.20260107.0.0
---

[Mitsuya Shibata (cosmos-door)]

On Debian sid, libabsl was updated to 20260107 the other day (Bug #1118630). In line with that, resolute also moved to 20260107, but for some reason 20240722 still seems to remain in the repository.

In my environment, libabsl20240722 got installed via ubuntu-dev-tools. This will be fixed by "re2 20250805-1build2" package.

---
$ apt why libabsl20240722
libabsl20240722:amd64 is selected for install because:
1. ubuntu-dev-tools:amd64 is selected for install
2. ubuntu-dev-tools:amd64 依存 devscripts (>= 2.11.0~)
3. devscripts:amd64 推奨 licensecheck
4. licensecheck:amd64 依存 libstring-license-perl
5. libstring-license-perl:amd64 依存 libregexp-pattern-license-perl
6. libregexp-pattern-license-perl:amd64 推奨 libre-engine-re2-perl
7. libre-engine-re2-perl:amd64 依存 libre2-11-absl20240722
8. libre2-11:amd64 依存 libabsl20240722 (>= 20240722.0-1)
---

It looks like mozc also needs to migrate to libabsl20260107.

[Mitsuya Shibata (cosmos-door)]

This is a debdiff to fix FTBFS of mozc on Resolute. I built this in sbuild and it builds successfully, and I installed it to Resolute, mozc works as intended.

[Mitsuya Shibata (cosmos-door)]

I attach the build log too.

After this, I plan to check whether the same problem happens on the Debian side, and then report it to Debian.

[Alessandro Astone (aleasto)]

Sponsored, thank you.

[Mitsuya Shibata (cosmos-door)]

Thanks!