[Bug target/115750] [14/15 regression] Emacs fails to build on HPPA since r14-4426-g0ee3266b3dec4d

[danglin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115750

--- Comment #2 from John David Anglin <danglin at gcc dot gnu.org> ---
The bisection result is puzzling.  The linux MALLOC_ABI_ALIGNMENT define
in pa32-linux.h is replaced by the one in pa.h by the commit.  As far as
I know, the malloc alignment for hppa-linux has always been 8 bytes.  It was
never 16 bytes.  As a result, malloc'd data is insufficiently aligned for
pthreads.

I removed the define from pa32-linux.h because it didn't reflect the
actual alignment provided by malloc in glibc.

Although emacs doesn't build in Debian,
https://buildd.debian.org/status/logs.php?pkg=emacs&arch=hppa
the issue is a couple of testsuite fails.  The main difference is
Debian builds using PA 1.1 code.  The Memory exhausted error doesn't
occur there.