Home | History | Annotate | Line # | Download | only in m4 
      1 # sys_stat_h.m4 serial 41   -*- Autoconf -*-
      2 dnl Copyright (C) 2006-2022 Free Software Foundation, Inc.
      3 dnl This file is free software; the Free Software Foundation
      4 dnl gives unlimited permission to copy and/or distribute it,
      5 dnl with or without modifications, as long as this notice is preserved.
      6 
      7 dnl From Eric Blake.
      8 dnl Provide a GNU-like <sys/stat.h>.
      9 
     10 AC_DEFUN_ONCE([gl_SYS_STAT_H],
     11 [
     12   AC_REQUIRE([gl_SYS_STAT_H_DEFAULTS])
     13 
     14   dnl Check for broken stat macros.
     15   AC_REQUIRE([AC_HEADER_STAT])
     16 
     17   gl_CHECK_NEXT_HEADERS([sys/stat.h])
     18 
     19   dnl Ensure the type mode_t gets defined.
     20   AC_REQUIRE([AC_TYPE_MODE_T])
     21 
     22   dnl Whether to enable precise timestamps in 'struct stat'.
     23   m4_ifdef([gl_WINDOWS_STAT_TIMESPEC], [
     24     AC_REQUIRE([gl_WINDOWS_STAT_TIMESPEC])
     25   ], [
     26     WINDOWS_STAT_TIMESPEC=0
     27   ])
     28   AC_SUBST([WINDOWS_STAT_TIMESPEC])
     29 
     30   dnl Whether to ensure that struct stat.st_size is 64-bit wide.
     31   m4_ifdef([gl_LARGEFILE], [
     32     AC_REQUIRE([gl_LARGEFILE])
     33   ], [
     34     WINDOWS_64_BIT_ST_SIZE=0
     35   ])
     36   AC_SUBST([WINDOWS_64_BIT_ST_SIZE])
     37 
     38   dnl Define types that are supposed to be defined in <sys/types.h> or
     39   dnl <sys/stat.h>.
     40   AC_CHECK_TYPE([nlink_t], [],
     41     [AC_DEFINE([nlink_t], [int],
     42        [Define to the type of st_nlink in struct stat, or a supertype.])],
     43     [#include <sys/types.h>
     44      #include <sys/stat.h>])
     45 
     46   dnl Check for declarations of anything we want to poison if the
     47   dnl corresponding gnulib module is not in use.
     48   gl_WARN_ON_USE_PREPARE([[#include <sys/stat.h>
     49     ]], [fchmodat fstat fstatat futimens getumask lchmod lstat
     50     mkdirat mkfifo mkfifoat mknod mknodat stat utimensat])
     51 
     52   AC_REQUIRE([AC_C_RESTRICT])
     53 ])
     54 
     55 # gl_SYS_STAT_MODULE_INDICATOR([modulename])
     56 # sets the shell variable that indicates the presence of the given module
     57 # to a C preprocessor expression that will evaluate to 1.
     58 # This macro invocation must not occur in macros that are AC_REQUIREd.
     59 AC_DEFUN([gl_SYS_STAT_MODULE_INDICATOR],
     60 [
     61   dnl Ensure to expand the default settings once only.
     62   gl_SYS_STAT_H_REQUIRE_DEFAULTS
     63   gl_MODULE_INDICATOR_SET_VARIABLE([$1])
     64   dnl Define it also as a C macro, for the benefit of the unit tests.
     65   gl_MODULE_INDICATOR_FOR_TESTS([$1])
     66 ])
     67 
     68 # Initializes the default values for AC_SUBSTed shell variables.
     69 # This macro must not be AC_REQUIREd.  It must only be invoked, and only
     70 # outside of macros or in macros that are not AC_REQUIREd.
     71 AC_DEFUN([gl_SYS_STAT_H_REQUIRE_DEFAULTS],
     72 [
     73   m4_defun(GL_MODULE_INDICATOR_PREFIX[_SYS_STAT_H_MODULE_INDICATOR_DEFAULTS], [
     74     gl_UNISTD_H_REQUIRE_DEFAULTS dnl for REPLACE_FCHDIR
     75     gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_FCHMODAT])
     76     gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_FSTAT])
     77     gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_FSTATAT])
     78     gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_FUTIMENS])
     79     gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_GETUMASK])
     80     gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_LCHMOD])
     81     gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_LSTAT])
     82     gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MKDIR])
     83     gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MKDIRAT])
     84     gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MKFIFO])
     85     gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MKFIFOAT])
     86     gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MKNOD])
     87     gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MKNODAT])
     88     gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_STAT])
     89     gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_UTIMENSAT])
     90     gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_OVERRIDES_STRUCT_STAT])
     91     dnl Support Microsoft deprecated alias function names by default.
     92     gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MDA_CHMOD], [1])
     93     gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MDA_MKDIR], [1])
     94     gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MDA_UMASK], [1])
     95   ])
     96   m4_require(GL_MODULE_INDICATOR_PREFIX[_SYS_STAT_H_MODULE_INDICATOR_DEFAULTS])
     97   AC_REQUIRE([gl_SYS_STAT_H_DEFAULTS])
     98 ])
     99 
    100 AC_DEFUN([gl_SYS_STAT_H_DEFAULTS],
    101 [
    102   dnl Assume proper GNU behavior unless another module says otherwise.
    103   HAVE_FCHMODAT=1;      AC_SUBST([HAVE_FCHMODAT])
    104   HAVE_FSTATAT=1;       AC_SUBST([HAVE_FSTATAT])
    105   HAVE_FUTIMENS=1;      AC_SUBST([HAVE_FUTIMENS])
    106   HAVE_GETUMASK=1;      AC_SUBST([HAVE_GETUMASK])
    107   HAVE_LCHMOD=1;        AC_SUBST([HAVE_LCHMOD])
    108   HAVE_LSTAT=1;         AC_SUBST([HAVE_LSTAT])
    109   HAVE_MKDIRAT=1;       AC_SUBST([HAVE_MKDIRAT])
    110   HAVE_MKFIFO=1;        AC_SUBST([HAVE_MKFIFO])
    111   HAVE_MKFIFOAT=1;      AC_SUBST([HAVE_MKFIFOAT])
    112   HAVE_MKNOD=1;         AC_SUBST([HAVE_MKNOD])
    113   HAVE_MKNODAT=1;       AC_SUBST([HAVE_MKNODAT])
    114   HAVE_UTIMENSAT=1;     AC_SUBST([HAVE_UTIMENSAT])
    115   REPLACE_FCHMODAT=0;   AC_SUBST([REPLACE_FCHMODAT])
    116   REPLACE_FSTAT=0;      AC_SUBST([REPLACE_FSTAT])
    117   REPLACE_FSTATAT=0;    AC_SUBST([REPLACE_FSTATAT])
    118   REPLACE_FUTIMENS=0;   AC_SUBST([REPLACE_FUTIMENS])
    119   REPLACE_LSTAT=0;      AC_SUBST([REPLACE_LSTAT])
    120   REPLACE_MKDIR=0;      AC_SUBST([REPLACE_MKDIR])
    121   REPLACE_MKFIFO=0;     AC_SUBST([REPLACE_MKFIFO])
    122   REPLACE_MKFIFOAT=0;   AC_SUBST([REPLACE_MKFIFOAT])
    123   REPLACE_MKNOD=0;      AC_SUBST([REPLACE_MKNOD])
    124   REPLACE_MKNODAT=0;    AC_SUBST([REPLACE_MKNODAT])
    125   REPLACE_STAT=0;       AC_SUBST([REPLACE_STAT])
    126   REPLACE_UTIMENSAT=0;  AC_SUBST([REPLACE_UTIMENSAT])
    127 ])
    128