Make sync_file_range() usage optional Under uClibc, sync_file_range() is not available under all architectures, so we fall back to fdatasync() in this case. Inspired by the patch done by Thomas Petazzoni for the 2.0-pre25 version. Signed-off-by: Samuel Martin --- configure.ac | 2 +- src/common/compat/fcntl.h | 5 +++++ 2 files changed, 6 insertions(+), 1 deletion(-) diff --git a/configure.ac b/configure.ac index 5808c79..065b9cf 100644 --- a/configure.ac +++ b/configure.ac @@ -120,7 +120,7 @@ AS_IF([test "x$lttng_ust_support" = "xyes"], [ AM_CONDITIONAL([HAVE_LIBLTTNG_UST_CTL], [ test "x$ac_cv_lib_lttng_ust_ctl_ustctl_create_session" = "xyes" ]) -AC_CHECK_FUNCS([sched_getcpu sysconf]) +AC_CHECK_FUNCS([sched_getcpu sysconf sync_file_range]) # check for dlopen AC_CHECK_LIB([dl], [dlopen], diff --git a/src/common/compat/fcntl.h b/src/common/compat/fcntl.h index 58c1579..dafb33e 100644 --- a/src/common/compat/fcntl.h +++ b/src/common/compat/fcntl.h @@ -23,10 +23,15 @@ #ifdef __linux__ +#if defined(HAVE_SYNC_FILE_RANGE) extern int compat_sync_file_range(int fd, off64_t offset, off64_t nbytes, unsigned int flags); #define lttng_sync_file_range(fd, offset, nbytes, flags) \ compat_sync_file_range(fd, offset, nbytes, flags) +#else +#define lttng_sync_file_range(fd, offset, nbytes, flags) \ + fdatasync(fd); +#endif #elif defined(__FreeBSD__) -- 1.7.10