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| author | Peter Maydell <peter.maydell@linaro.org> | 2017-09-05 13:19:32 +0100 |
|---|---|---|
| committer | Michael Tokarev <mjt@tls.msk.ru> | 2017-09-26 09:06:02 +0300 |
| commit | 401bc051d7706e33046d79539465b8326383a1b2 (patch) | |
| tree | 74976781032c432aeb650335be8377f8be465c63 /configure | |
| parent | 5746c1cd152033c3f9ccdb1476dbb0f092659983 (diff) | |
| download | qemu-401bc051d7706e33046d79539465b8326383a1b2.tar.gz | |
util/qemu-thread-posix.c: Replace OS ifdefs with CONFIG_HAVE_SEM_TIMEDWAIT
In qemu-thread-posix.c we have two implementations of the
various qemu_sem_* functions, one of which uses native POSIX
sem_* and the other of which emulates them with pthread conditions.
This is necessary because not all our host OSes support
sem_timedwait().
Instead of a hard-coded list of OSes which don't implement
sem_timedwait(), which gets out of date, make configure
test for the presence of the function and set a new
CONFIG_HAVE_SEM_TIMEDWAIT appropriately.
In particular, newer NetBSDs have sem_timedwait(), so this
commit will switch them over to using it. OSX still does
not have an implementation.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Kamil Rytarowski <n54@gmx.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
Diffstat (limited to 'configure')
| -rwxr-xr-x | configure | 15 |
1 files changed, 15 insertions, 0 deletions
@@ -4425,6 +4425,18 @@ if compile_prog "" "" ; then fi ########################################## +# check if we have sem_timedwait + +sem_timedwait=no +cat > $TMPC << EOF +#include <semaphore.h> +int main(void) { return sem_timedwait(0, 0); } +EOF +if compile_prog "" "" ; then + sem_timedwait=yes +fi + +########################################## # check if trace backend exists $python "$source_path/scripts/tracetool.py" "--backends=$trace_backends" --check-backends > /dev/null 2> /dev/null @@ -5678,6 +5690,9 @@ fi if test "$inotify1" = "yes" ; then echo "CONFIG_INOTIFY1=y" >> $config_host_mak fi +if test "$sem_timedwait" = "yes" ; then + echo "CONFIG_SEM_TIMEDWAIT=y" >> $config_host_mak +fi if test "$byteswap_h" = "yes" ; then echo "CONFIG_BYTESWAP_H=y" >> $config_host_mak fi |