gnulib/import/m4/glob.m4

   1 # glob.m4 serial 14
   2 dnl Copyright (C) 2005-2007, 2009-2016 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 # The glob module assumes you want GNU glob, with glob_pattern_p etc,
   8 # rather than vanilla POSIX glob.  This means your code should
   9 # always include <glob.h> for the glob prototypes.
  10
  11 AC_DEFUN([gl_GLOB],
  12 [ GLOB_H=
  13   AC_CHECK_HEADERS([glob.h], [], [GLOB_H=glob.h])
  14
  15   if test -z "$GLOB_H"; then
  16     AC_CACHE_CHECK([for GNU glob interface version 1],
  17       [gl_cv_gnu_glob_interface_version_1],
  18 [     AC_COMPILE_IFELSE([AC_LANG_SOURCE(
  19 [[#include <gnu-versions.h>
  20 char a[_GNU_GLOB_INTERFACE_VERSION == 1 ? 1 : -1];]])],
  21         [gl_cv_gnu_glob_interface_version_1=yes],
  22         [gl_cv_gnu_glob_interface_version_1=no])])
  23
  24     if test "$gl_cv_gnu_glob_interface_version_1" = "no"; then
  25       GLOB_H=glob.h
  26     fi
  27   fi
  28
  29   if test -z "$GLOB_H"; then
  30     AC_CACHE_CHECK([whether glob lists broken symlinks],
  31                    [gl_cv_glob_lists_symlinks],
  32 [     if ln -s conf-doesntexist conf$$-globtest 2>/dev/null; then
  33         gl_cv_glob_lists_symlinks=maybe
  34       else
  35         # If we can't make a symlink, then we cannot test this issue.  Be
  36         # pessimistic about this.
  37         gl_cv_glob_lists_symlinks=no
  38       fi
  39
  40       if test $gl_cv_glob_lists_symlinks = maybe; then
  41         AC_RUN_IFELSE([
  42 AC_LANG_PROGRAM(
  43 [[#include <stddef.h>
  44 #include <glob.h>]],
  45 [[glob_t found;
  46 if (glob ("conf*-globtest", 0, NULL, &found) == GLOB_NOMATCH) return 1;]])],
  47           [gl_cv_glob_lists_symlinks=yes],
  48           [gl_cv_glob_lists_symlinks=no], [gl_cv_glob_lists_symlinks=no])
  49       fi])
  50
  51     if test $gl_cv_glob_lists_symlinks = no; then
  52       GLOB_H=glob.h
  53     fi
  54   fi
  55
  56   rm -f conf$$-globtest
  57
  58   AC_SUBST([GLOB_H])
  59   AM_CONDITIONAL([GL_GENERATE_GLOB_H], [test -n "$GLOB_H"])
  60 ])
  61
  62 # Prerequisites of lib/glob.*.
  63 AC_DEFUN([gl_PREREQ_GLOB],
  64 [
  65   AC_REQUIRE([gl_CHECK_TYPE_STRUCT_DIRENT_D_TYPE])dnl
  66   AC_REQUIRE([AC_C_RESTRICT])dnl
  67   AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])dnl
  68   AC_CHECK_HEADERS_ONCE([sys/cdefs.h unistd.h])dnl
  69   if test $ac_cv_header_sys_cdefs_h = yes; then
  70     HAVE_SYS_CDEFS_H=1
  71   else
  72     HAVE_SYS_CDEFS_H=0
  73   fi
  74   AC_SUBST([HAVE_SYS_CDEFS_H])
  75   AC_CHECK_FUNCS_ONCE([fstatat getlogin_r getpwnam_r])dnl
  76 ])