Bug#1017962: mozjs102: Fails to build on armhf

[Jeremy Bicha <jeremy.bicha@canonical.com>]

Source: mozjs102
Version: 102.2.0-1
Severity: important
X-Debbugs-CC: debian-arm@lists.debian.org
Tags: ftbfs help

mozjs102 fails to build on armhf. This is a problem because it is
blocking us from being able to switch Debian's gjs to use mozjs102
instead of the obsolete mozjs91.

https://buildd.debian.org/status/logs.php?pkg=mozjs102&arch=armhf

Here's an excerpt from the build log:

In function ‘uint64_t js::jit::AtomicCmpXchg64SeqCst(uint64_t*,
uint64_t, uint64_t)’,
    inlined from ‘static T
js::jit::AtomicOperations::fetchAndSeqCst(T*, T) [with T = long long
int]’ at /<<PKGBUILDDIR>>/js/src/jit/shared/AtomicOperations-shared-jit.h:337:1,
    inlined from ‘static T
js::jit::AtomicOperations::fetchAndSeqCst(SharedMem<T*>, T) [with T =
long long int]’ at
/<<PKGBUILDDIR>>/js/src/jit/AtomicOperations.h:212:26,
    inlined from ‘virtual bool
cls_testAtomicOperationsI64::run(JS::HandleObject)’ at
/<<PKGBUILDDIR>>/js/src/jsapi-tests/testAtomicOperations.cpp:223:3:
/<<PKGBUILDDIR>>/debian/build/js/src/jit/AtomicOperationsGenerated.h:240:17:
error: ‘asm’ operand has impossible constraints
  240 |                 asm volatile (
      |                 ^~~


Thank you,
Jeremy Bicha