https://gcc.gnu.org/bugzilla/show_bug.cgi?id=124512
Bug ID: 124512
Summary: libgfortran shmem caf: NetBSD has no
pthread_condattr_setpshared
Product: gcc
Version: 16.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: prlw1 at cam dot ac.uk
Target Milestone: ---
Failed to build e797ddb06215bfac on NetBSD 11.99.5.
commit 136940891b16ba795d87f40a5e986c143721b683 (HEAD)
Author: Andre Vehreschild <[email protected]>
Date: Thu Feb 12 11:17:47 2026 -0800
Fortran: Add a shared memory coarray implementation [PR88076]
introduced a couple of calls to
pthread_mutexattr_setpshared (&mattr, PTHREAD_PROCESS_SHARED)
in libgfortran/caf/shmem/thread_support.c namely in initialize_shared_mutex().
Unfortunately NetBSD doesn't support PTHREAD_PROCESS_SHARED - according
to https://man.netbsd.org/pthread_mutexattr_setpshared.3
BUGS
The pthread_mutexattr_getpshared() and pthread_mutexattr_setpshared()
functions are hidden by default since only thread shared attributes are
supported.
(i.e., not per process)
$ nm -g /lib/libpthread.so | grep mutexattr
000000000000b036 T __libc_mutexattr_destroy
U __libc_mutexattr_destroy_stub
000000000000b025 T __libc_mutexattr_init
000000000000b0c0 T __libc_mutexattr_settype
U __libc_mutexattr_settype_stub
000000000000b036 T pthread_mutexattr_destroy
000000000000b1c2 T pthread_mutexattr_getprioceiling
000000000000b125 T pthread_mutexattr_getprotocol
000000000000b083 T pthread_mutexattr_gettype
000000000000b025 T pthread_mutexattr_init
000000000000b1ff T pthread_mutexattr_setprioceiling
000000000000b162 T pthread_mutexattr_setprotocol
000000000000b0c0 T pthread_mutexattr_settype
so an AC_CHECK_FUNCS should fail to find it - but I don't know what the
consequences are - thoughts?
