[PATCH 2/3] time: Use 64 prefix syscall if we have to
alistair.francis at wdc.com
Wed Aug 28 21:13:14 UTC 2019
Some 32-bit architectures no longer have the 32-bit time_t syscalls.
Instead they have suffixed syscalls that returns a 64-bit time_t. If
the architecture doesn't have the non-suffixed syscall and is using a
64-bit time_t let's use the suffixed syscall instead.
This fixes build issues when building for RISC-V 32-bit with 5.1+ kernel
If an architecture only supports the suffixed syscalls, but is still
using a 32-bit time_t report a compilation error. This avoids us have to
deal with converting between 64-bit and 32-bit values. There are
currently no architectures where this is the case.
Signed-off-by: Alistair Francis <alistair.francis at wdc.com>
libbb/time.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/libbb/time.c b/libbb/time.c
index cab0ad602..b6fcae28b 100644
@@ -257,7 +257,14 @@ char* FAST_FUNC strftime_YYYYMMDDHHMMSS(char *buf, unsigned len, time_t *tp)
* typically requiring -lrt. We just skip all this mess */
static void get_mono(struct timespec *ts)
if (syscall(__NR_clock_gettime, CLOCK_MONOTONIC, ts))
+#elif __TIMESIZE == 64
+ if (syscall(__NR_clock_gettime64, CLOCK_MONOTONIC, ts))
+# error "We currently don't support architectures without " \
+ "the __NR_clock_gettime syscall and 32-bit time_t"
unsigned long long FAST_FUNC monotonic_ns(void)
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