All supported computers have either POSIX or Windows threads, and we no
longer have any automated testing of --disable-thread-safety. We define
a vestigial ENABLE_THREAD_SAFETY macro to 1 in ecpg_config.h in case it
is useful, but we no longer test it anywhere in PostgreSQL code, and
associated dead code paths are removed.
The Meson and perl-based Windows build scripts never had an equivalent
build option.
Reviewed-by: Andres Freund <andres@anarazel.de>
Reviewed-by: Peter Eisentraut <peter@eisentraut.org>
Reviewed-by: Heikki Linnakangas <hlinnaka@iki.fi>
Discussion: https://postgr.es/m/CA%2BhUKGLtmexrpMtxBRLCVePqV_dtWG-ZsEbyPrYc%2BNBB2TkNsw%40mail.gmail.com
This reverts commit f7ab80285. Per discussion, we can't remove an
exported symbol without a SONAME bump, which we don't want to do.
In particular that breaks usage of current libpq.so with pre-9.3
versions of psql etc, which need libpq to export pqsignal().
As noted in that commit message, exporting the symbol from libpgport.a
won't work reliably; but actually we don't want to export src/port's
implementation anyway. Any pre-9.3 client is going to be expecting the
definition that pqsignal() had before 9.3, which was that it didn't
set SA_RESTART for SIGALRM. Hence, put back pqsignal() in a separate
source file in src/interfaces/libpq, and give it the old semantics.
Back-patch to v12.
Discussion: https://postgr.es/m/E1g5vmT-0003K1-6S@gemulon.postgresql.org
Thomas Munro
Bruce Momjian
Tom Lane