Martijn Dekker 58560db768 Restore build without __sync_fetch_and_{add,sub} (re: 07cc71b8) ... The more I think about it, the more it seems obvious that commit 07cc71b8 (PR #14) is quite simply a workaround for a GCC optimiser bug, and (who knows?) possibly an old, long-fixed one, as the bug report is years old. The commit also caused ksh to fail to build on HP-UX B.11.11 with GCC 4.2.3 (hosted at polarhome.com), because it doesn't have __sync_fetch_and_add() and __sync_fetch_and_sub(). It may fail on other systems. The GCC documentation says these are legacy: https://gcc.gnu.org/onlinedocs/gcc/_005f_005fsync-Builtins.html HELP WANTED: what I would like best is if someone could come up with some way of detecting this optimiser bug and then error out with a message along the lines of "please upgrade your broken compiler". It would probably need to be a new iffe test. Meanwhile, let's try it this way for a while and see what happens: src/cmd/ksh93/include/jobs.h: - Restore original ksh version of job_lock()/job_unlock() macros. - Use the workaround version only if the compiler has the builtins __sync_fetch_and_add() and __sync_fetch_and_sub().		2020-06-14 23:49:07 +02:00
..
builtin	Restore AST 'pty' pseudoterminal command (re: reboot)	2020-06-12 12:35:58 +02:00
INIT	Simplify exit status fix, restore interruptability	2020-06-12 02:11:46 +02:00
ksh93	Restore build without __sync_fetch_and_{add,sub} (re: 07cc71b8)	2020-06-14 23:49:07 +02:00
Makefile	Version: 2012-08-01-master	2016-01-11 15:54:23 -05:00
Mamfile	Version: 2012-08-01-master	2016-01-11 15:54:23 -05:00