[Bug 2062407] New: msgfmt cannot invoke javac

https://bugzilla.redhat.com/show_bug.cgi?id=2062407

            Bug ID: 2062407
           Summary: msgfmt cannot invoke javac
           Product: Fedora
           Version: rawhide
          Hardware: All
                OS: Linux
            Status: NEW
         Component: gettext
          Severity: low
          Assignee: suanand(a)redhat.com
          Reporter: loganjerry(a)gmail.com
        QA Contact: extras-qa(a)fedoraproject.org
                CC: dueno(a)redhat.com, i18n-bugs(a)lists.fedoraproject.org,
                    jjanco(a)redhat.com, nphilipp(a)redhat.com,
                    petersen(a)redhat.com, praiskup(a)redhat.com,
                    suanand(a)redhat.com
  Target Milestone: ---
    Classification: Fedora



Description of problem:
I noticed while building jmol that every invocation of msgfmt failed, e.g.:

update-application-catalog-lang:
     [echo] msgfmt Updating messages_ar.class file for Jmol ...
     [exec] msgfmt: Java compiler not found, try installing gcj or set $JAVAC
     [exec] msgfmt: compilation of Java class failed, please try --verbose or
set $JAVAC
     [exec] 65 translated messages, 3 fuzzy translations, 380 untranslated
messages.
     [exec] Result: 1

Setting JAVAC does *not* help.  I used strace to see how javac is invoked and
found the problem: msgfmt passes -target 1.6, and sometimes -source 1.6, to
javac.  Now that OpenJDK 17 is the default in Fedora, those arguments are no
longer valid.  I don't remember if the minimum allowed is 1.7 or 1.8, but it is
one of the two.  Since Fedora doesn't ship a JDK lower than 1.8, then 1.8 might
as well be used.

Version-Release number of selected component (if applicable):
gettext-0.21-11.fc37.0.20220228

How reproducible:
Always

Steps to Reproduce:
1. fedpkg clone jmol
2. cd jmol
3. fedpkg srpm
4. mock -r fedora-rawhide-x86_64 --rebuild jmol-14.32.22-1.fc37.src.rpm

Actual results:
The msgfmt invocations all fail.

Expected results:
The msgfmt invocations should succeed.

Additional info:


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https://bugzilla.redhat.com/show_bug.cgi?id=2062407