diff options
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac index 3ddb6f073a5..d3c8f8b9514 100644 --- a/configure.ac +++ b/configure.ac @@ -1018,6 +1018,25 @@ if test "x${have_posix_fallocate}" = "xyes"; then AC_DEFINE(HAVE_POSIX_FALLOCATE, 1, [define if posix_fallocate exists]) fi +# On fedora-29, copy_file_range syscall and the libc API both are present. +# Whereas, on some machines such as centos-7, RHEL-7, the API is not there. +# Only the system call is present. So, this change is to determine whether +# the API is present or not. If not, then check whether the system call is +# present or not. Accordingly sys_copy_file_range function will first call +# the API if it is there. Otherwise it will call syscall(SYS_copy_file_range). +AC_CHECK_FUNC([copy_file_range], [have_copy_file_range=yes]) +if test "x${have_copy_file_range}" = "xyes"; then + AC_DEFINE(HAVE_COPY_FILE_RANGE, 1, [define if copy_file_range exists]) +else + OLD_CFLAGS=${CFLAGS} + CFLAGS="-D_GNU_SOURCE" + AC_CHECK_DECL([SYS_copy_file_range], , , [#include <sys/syscall.h>]) + if test "x${ac_cv_have_decl_SYS_copy_file_range}" = "xyes"; then + AC_DEFINE(HAVE_COPY_FILE_RANGE_SYS, 1, [define if SYS_copy_file_range is available]) + fi + CFLAGS=${OLD_CFLAGS} +fi + BUILD_NANOSECOND_TIMESTAMPS=no AC_CHECK_FUNC([utimensat], [have_utimensat=yes]) if test "x${have_utimensat}" = "xyes"; then |