kc3-lang/libbsd/m4/libbsd-large.m4

• Show log

  Commit

• Hash : 2a3d5213
  Author :
  Date : 2024-03-14T01:56:36
  

  build: Do not rely on internal autoconf ac_cv_sys_file_offset_bits variable
  
  This is an internal implementation detail from AC_SYS_LARGEFILE, which
  happened to change with autoconf 2.72. Instead compute our own size
  for off_t.
  
  Closes: #28
  

Download

• m4/libbsd-large.m4

• # 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])
    ])
  ])
  

Download