From 1e9737da4aafb54681203931dfe8f8eea21fcef7 Mon Sep 17 00:00:00 2001 From: Richard Henderson Date: Tue, 23 Oct 2012 07:33:00 +1000 Subject: qemu-timer: Check for usable fields for SIGEV_THREAD_ID Older glibc (RHEL 5.x, Debian 5.x) does not have the _sigev_un._tid member in its structure definition, while the accompanying kernel headers do define SIGEV_THREAD_ID. We need configure to check for both before using it. Signed-off-by: Richard Henderson Signed-off-by: Aurelien Jarno --- configure | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) (limited to 'configure') diff --git a/configure b/configure index 37f712d475..3685020ffa 100755 --- a/configure +++ b/configure @@ -2812,6 +2812,24 @@ if compile_prog "" "" ; then posix_madvise=yes fi +########################################## +# check if we have usable SIGEV_THREAD_ID + +sigev_thread_id=no +cat > $TMPC << EOF +#include +int main(void) { + struct sigevent ev; + ev.sigev_notify = SIGEV_THREAD_ID; + ev._sigev_un._tid = 0; + asm volatile("" : : "g"(&ev)); + return 0; +} +EOF +if compile_prog "" "" ; then + sigev_thread_id=yes +fi + ########################################## # check if trace backend exists @@ -3159,6 +3177,7 @@ echo "preadv support $preadv" echo "fdatasync $fdatasync" echo "madvise $madvise" echo "posix_madvise $posix_madvise" +echo "sigev_thread_id $sigev_thread_id" echo "uuid support $uuid" echo "libcap-ng support $cap_ng" echo "vhost-net support $vhost_net" @@ -3443,6 +3462,9 @@ fi if test "$posix_madvise" = "yes" ; then echo "CONFIG_POSIX_MADVISE=y" >> $config_host_mak fi +if test "$sigev_thread_id" = "yes" ; then + echo "CONFIG_SIGEV_THREAD_ID=y" >> $config_host_mak +fi if test "$spice" = "yes" ; then echo "CONFIG_SPICE=y" >> $config_host_mak -- cgit v1.2.1