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authorwm4 <wm4@nowhere>2018-01-17 12:10:41 +0100
committerKevin Mitchell <kevmitch@gmail.com>2018-01-18 00:25:00 -0800
commitda662ef182a5f62ec0c75aa43cbd94d5647add2a (patch)
treee6b81509cdbdb2a1363637d6bc36501338a11df1 /stream/tvi_v4l2.c
parent4f49334318179201e56b62e065d39b7e38485fab (diff)
downloadmpv-da662ef182a5f62ec0c75aa43cbd94d5647add2a.tar.bz2
mpv-da662ef182a5f62ec0c75aa43cbd94d5647add2a.tar.xz
Fix undefined preprocessor behavior
This commit eliminates the following clang warning: warning: macro expansion producing 'defined' has undefined behavior [-Wexpansion-to-defined] Going by the clang commit message, this seems to be explicitly specified as UB by the standard, and they added this warning because MSVC apparently results in different behavior. Whatever, we can just avoid the warning with some small changes.
Diffstat (limited to 'stream/tvi_v4l2.c')
-rw-r--r--stream/tvi_v4l2.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/stream/tvi_v4l2.c b/stream/tvi_v4l2.c
index bd7ecd1e27..57bf6b875f 100644
--- a/stream/tvi_v4l2.c
+++ b/stream/tvi_v4l2.c
@@ -72,7 +72,11 @@ known issues:
#define V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC 0x2000
#endif
-#define HAVE_CLOCK_GETTIME (defined(_POSIX_TIMERS) && _POSIX_TIMERS > 0)
+#if defined(_POSIX_TIMERS) && _POSIX_TIMERS > 0
+#define HAVE_CLOCK_GETTIME 1
+#else
+#define HAVE_CLOCK_GETTIME 0
+#endif
#define info tvi_info_v4l2
static tvi_handle_t *tvi_init_v4l2(struct mp_log *log, tv_param_t* tv_param);