ivar 1.4.2+dfsg-2 FTBFS

[Mateus Rodrigues de Morais]

ivar 1.4.2+dfsg-2 is currently failing to build from source on all architectures, except riscv64 [1].

On amd64 and arm64, the failure seems to be LTO-related. I've tested adding optimize=-lto to DEB_BUILD_MAINT_OPTIONS in d/rules and that seems to fix the issue for the two architectures.

However, on all other archs, the build failure seems to be related with autopkgtests, e.g.

```
...
Reverse
Cigar flag didn't match for test_184_379_11:1:0_8:1:0_26 ! Expected 6 Got 0
Cigar length didn't match for test_184_379_11:1:0_8:1:0_26 ! Expected 2 Got 89
Cigar flag didn't match for test_184_379_11:1:0_8:1:0_26 ! Expected 0 Got 4
Cigar length didn't match for test_184_379_11:1:0_8:1:0_26 ! Expected 89 Got 18

Condensing cigar ...
Cigar length didn't match after condense! Expected 71 Got 160
Cigar flag didn't match! Expected  Got 4
Cigar length didn't match after condense! Expected 2 Got 18
FAIL check_unpaired_trim (exit status: 255)

============================================================================
Testsuite summary for ivar 1.4.2
============================================================================
# TOTAL: 19
# PASS: 18
# SKIP: 0
# XFAIL: 0
# FAIL: 1
# XPASS: 0
# ERROR: 0
...
```

[1] https://launchpad.net/ubuntu/+source/ivar/1.4.2+dfsg-2

[Graham Inggs (ginggs)]

ivar has never built on armhf, ppc64el and s390x, so fixing it on amd64 and arm64 should be sufficient for it to migrate.

[Mateus Rodrigues de Morais (mateus-morais)]

In that case, I've submitted a MP to fix amd64 and arm64 by disabling LTO.

[Graham Inggs (ginggs)]

I triggered the autopkgtests in the PPA and they succeeded on amd64 and arm64:
https://autopkgtest.ubuntu.com/results/autopkgtest-mantic-mateus-morais-ivar-ftbfs/?format=plain

[Launchpad Janitor (janitor)]

This bug was fixed in the package ivar - 1.4.2+dfsg-2ubuntu1

---------------
ivar (1.4.2+dfsg-2ubuntu1) mantic; urgency=medium

  * d/rules: disable LTO to fix failure to build from source on amd64 and
    arm64 on Ubuntu. (LP: #2037769)

 -- Mateus Rodrigues de Morais <email address hidden> Wed, 27 Sep 2023 12:41:50 -0300