https://bz.apache.org/bugzilla/show_bug.cgi?id=65170
Bug ID: 65170
Summary: endless futex_wait engages randomly when building
libgdx (concretely while executing g++) on aarch64
(musl libc)
Product: Ant
Version: 1.10.9
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P2
Component: Other
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---
when building libgdx on alpine linux on aarch64 (with a patch to build for
current architecture instead of cross-compiling), whenever g++ gets invoked,
there seems to be some chance that instead of g++ starting, nothing happens at
all and ant seems to be stuck in futex_wait (possibly waiting for g++ to exit,
but since g++ didn't even start...)
when using qemu user mode emulation on an x86_64 machine, the chance that a
call to g++ instead freezes the process seems to be low enough that sometimes
the whole build gets through, while on a native aarch64 device (msm8998,
mainline Linux not android) only about 0-4 c++ files get compiled to object
files before the hang occurs. Running natively on x86_64, I never saw this
issue (musl or otherwise)
in case it's related, the environment is an aarch64 chroot (architectural one
on the x86_64 machine) with alpine linux (so musl libc).
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