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(-) --- a/configure.ac +++ b/configure.ac @@ -150,7 +150,7 @@ AS_IF([test "x$lttng_ust_support" = "xye ) ]) AM_CONDITIONAL([HAVE_LIBLTTNG_UST_CTL], [test "x$lttng_ust_ctl_found" = xyes]) -AC_CHECK_FUNCS([sched_getcpu sysconf]) +AC_CHECK_FUNCS([sched_getcpu sysconf sync_file_range]) # check for dlopen AC_CHECK_LIB([dl], [dlopen], @@ -394,4 +394,3 @@ AS_IF([test "x$consumerd_only" = "xno"], ]) AS_ECHO() - --- a/src/common/compat/compat-fcntl.c +++ b/src/common/compat/compat-fcntl.c @@ -23,7 +23,11 @@ int compat_sync_file_range(int fd, off64_t offset, off64_t nbytes, unsigned int flags) { +#ifdef HAVE_SYNC_FILE_RANGE return sync_file_range(fd, offset, nbytes, flags); +#else + return fdatasync(fd); +#endif } #endif /* __linux__ */