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local: require clock_gettime()

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Make clock_gettime() a hard requirement of chrony. It should be
available on all reasonably recent versions of the supported systems.

This enables adoption of the clockid_t type (CLOCK_* identifiers).
This commit is contained in:
Miroslav Lichvar
2026-01-27 16:32:28 +01:00
parent b6f1650e7a
commit 91d6ccb189
2 changed files with 6 additions and 16 deletions
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9
configure vendored
View File

@@ -666,18 +666,18 @@ then
fi
if [ $try_clock_gettime = "1" ]; then
if test_code 'clock_gettime()' 'time.h' '' '' '
if ! test_code 'clock_gettime()' 'time.h' '' '' '
struct timespec ts;
clock_gettime(CLOCK_REALTIME, &ts);'
then
add_def HAVE_CLOCK_GETTIME
else
if test_code 'clock_gettime() in -lrt' 'time.h' '' '-lrt' '
struct timespec ts;
clock_gettime(CLOCK_REALTIME, &ts);'
then
add_def HAVE_CLOCK_GETTIME
EXTRA_LIBS="$EXTRA_LIBS -lrt"
else
echo "error: clock_gettime() not found"
exit 1
fi
fi
fi
@@ -829,7 +829,6 @@ then
fi
if [ $feat_refclock = "1" ] && [ $feat_phc = "1" ] && [ $try_phc = "1" ] && \
grep '#define HAVE_CLOCK_GETTIME' config.h > /dev/null && \
test_code '<linux/ptp_clock.h>' 'sys/ioctl.h linux/ptp_clock.h' '' '' \
'ioctl(1, PTP_CLOCK_GETCAPS + PTP_SYS_OFFSET, 0);'
then

13
local.c
View File

@@ -109,7 +109,7 @@ static double max_clock_error;
static int
get_clock_resolution(void)
{
#if defined(HAVE_CLOCK_GETTIME) && !defined(LINUX)
#ifndef LINUX
struct timespec res;
if (clock_getres(CLOCK_REALTIME, &res) < 0)
@@ -123,7 +123,7 @@ get_clock_resolution(void)
/* ================================================== */
#if defined(LINUX) && defined(HAVE_CLOCK_GETTIME) && defined(CLOCK_MONOTONIC_RAW)
#if defined(LINUX) && defined(CLOCK_MONOTONIC_RAW)
static int
compare_ints(const void *a, const void *b)
@@ -499,17 +499,8 @@ void LCL_RemoveDispersionNotifyHandler(LCL_DispersionNotifyHandler handler, void
void
LCL_ReadRawTime(struct timespec *ts)
{
#if HAVE_CLOCK_GETTIME
if (clock_gettime(CLOCK_REALTIME, ts) < 0)
LOG_FATAL("clock_gettime() failed : %s", strerror(errno));
#else
struct timeval tv;
if (gettimeofday(&tv, NULL) < 0)
LOG_FATAL("gettimeofday() failed : %s", strerror(errno));
UTI_TimevalToTimespec(&tv, ts);
#endif
}
/* ================================================== */