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# Copyright © 2024 Guillem Jover <guillem@hadrons.org>
# LIBBSD_SYS_TIME64
# -----------------
# Check for availability of time64 support.
AC_DEFUN([LIBBSD_SYS_TIME64], [
# Check the default time_t size.
AC_CHECK_SIZEOF([time_t], [], [[
#undef _TIME_BITS
#include <time.h>
]])
AS_IF([test $ac_cv_sizeof_time_t -eq 8], [
libbsd_sys_time_bits=64
], [
libbsd_sys_time_bits=32
])
AC_DEFINE_UNQUOTED([LIBBSD_SYS_TIME_BITS], [$libbsd_sys_time_bits],
[The number of bits for the default system time_t ABI])
AC_SUBST([LIBBSD_SYS_TIME_BITS], [$libbsd_sys_time_bits])
AS_UNSET([ac_cv_sizeof_time_t])
AM_CONDITIONAL([LIBBSD_SYS_IS_TIME32], [test "$libbsd_sys_time_bits" -eq 32])
# Check the whether the system supports 64-bit time_t.
AC_CHECK_SIZEOF([time_t], [], [[
#define _FILE_OFFSET_BITS 64
#define _TIME_BITS 64
#include <time.h>
]])
AS_IF([test $ac_cv_sizeof_time_t -eq 8], [
libbsd_sys_has_time64=1
], [
libbsd_sys_has_time64=0
])
AC_DEFINE_UNQUOTED([LIBBSD_SYS_HAS_TIME64], [$libbsd_sys_has_time64],
[Enable if the system supports 64-bit time_t])
AC_SUBST([LIBBSD_SYS_HAS_TIME64], [$libbsd_sys_has_time64])
AM_CONDITIONAL([LIBBSD_SYS_HAS_TIME64], [test "$libbsd_sys_has_time64" -eq 1])
AS_IF([test "$libbsd_sys_time_bits" -eq 32 && \
test "$libbsd_sys_has_time64" -eq 1], [
abi_time64=yes
], [
abi_time64=no
])
LIBBSD_SELECT_ABI([time64], [explicit time64 time_t support])
AC_CHECK_SIZEOF([off_t], [], [[
#define _FILE_OFFSET_BITS 64
#include <sys/types.h>
]])
AS_IF([test $ac_cv_sizeof_off_t = 8], [
libbsd_sys_has_lfs=1
], [
libbsd_sys_has_lfs=0
])
AS_IF([test $libbsd_sys_has_lfs -eq 1 && \
test $libbsd_sys_time_bits -eq 32 && \
test $ac_cv_sizeof_time_t -eq 8], [
AC_DEFINE([_TIME_BITS], [64], [Enable 64-bit time_t support])
])
])
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