util: include unistd.h, which may be required for usleep prototype

This seems to be dropped in 222a2fb9 "util: move os_time.[ch] to src/util"

../../../src/util/os_time.c: In function ‘os_time_sleep’:
../../../src/util/os_time.c:104:4: error: implicit declaration of function ‘usleep’ [-Werror=implicit-function-declaration]

Signed-off-by: Jon Turney <jon.turney@dronecode.org.uk>
Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>

diff --git a/src/util/os_time.c b/src/util/os_time.c
index 8d8291f..72dc7e4 100644 (file)
--- a/src/util/os_time.c
+++ b/src/util/os_time.c
@@ -40,6 +40,7 @@
 #include "util/u_atomic.h"
 
 #if defined(PIPE_OS_UNIX)
+#  include <unistd.h> /* usleep */
 #  include <time.h> /* timeval */
 #  include <sys/time.h> /* timeval */
 #  include <sched.h> /* sched_yield */