gdb/gnulib/import/m4/glob.m4

   1 # glob.m4 serial 21
   2 dnl Copyright (C) 2005-2007, 2009-2018 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 [
  13   AC_REQUIRE([gl_GLOB_H])
  14
  15   AC_CHECK_FUNCS_ONCE([glob glob_pattern_p])
  16   if test $ac_cv_func_glob = no; then
  17     HAVE_GLOB=0
  18   else
  19
  20     AC_CACHE_CHECK([for GNU glob interface version 1 or 2],
  21       [gl_cv_gnu_glob_interface_version_1_2],
  22 [     AC_COMPILE_IFELSE([AC_LANG_SOURCE(
  23 [[#include <gnu-versions.h>
  24 char a[_GNU_GLOB_INTERFACE_VERSION == 1 || _GNU_GLOB_INTERFACE_VERSION == 2 ? 1 : -1];]])],
  25         [gl_cv_gnu_glob_interface_version_1_2=yes],
  26         [gl_cv_gnu_glob_interface_version_1_2=no])])
  27     if test "$gl_cv_gnu_glob_interface_version_1_2" = "no"; then
  28       REPLACE_GLOB=1
  29     fi
  30
  31     if test $REPLACE_GLOB = 0; then
  32       AC_CACHE_CHECK([whether glob lists broken symlinks],
  33                      [gl_cv_glob_lists_symlinks],
  34         [if ln -s conf-doesntexist conf$$-globtest 2>/dev/null; then
  35            gl_cv_glob_lists_symlinks=maybe
  36          else
  37            # If we can't make a symlink, then we cannot test this issue.  Be
  38            # pessimistic about this.
  39            gl_cv_glob_lists_symlinks=no
  40          fi
  41          if test $gl_cv_glob_lists_symlinks = maybe; then
  42            AC_RUN_IFELSE(
  43              [AC_LANG_PROGRAM(
  44                 [[#include <stddef.h>
  45                   #include <glob.h>]],
  46                 [[glob_t found;
  47                   if (glob ("conf*-globtest", 0, NULL, &found) == GLOB_NOMATCH)
  48                     return 1;
  49                 ]])],
  50              [gl_cv_glob_lists_symlinks=yes],
  51              [gl_cv_glob_lists_symlinks=no],
  52              [gl_cv_glob_lists_symlinks=no])
  53          fi
  54          rm -f conf$$-globtest
  55         ])
  56       if test $gl_cv_glob_lists_symlinks = no; then
  57         REPLACE_GLOB=1
  58       fi
  59     fi
  60
  61   fi
  62
  63   if test $ac_cv_func_glob_pattern_p = no; then
  64     HAVE_GLOB_PATTERN_P=0
  65   else
  66     if test $REPLACE_GLOB = 1; then
  67       REPLACE_GLOB_PATTERN_P=1
  68     fi
  69   fi
  70
  71   if test $HAVE_GLOB = 0 || test $REPLACE_GLOB = 1; then
  72     gl_REPLACE_GLOB_H
  73   fi
  74 ])
  75
  76 # Prerequisites of lib/glob.c and lib/globfree.c.
  77 AC_DEFUN([gl_PREREQ_GLOB],
  78 [
  79   AC_REQUIRE([gl_CHECK_TYPE_STRUCT_DIRENT_D_TYPE])
  80   AC_CHECK_HEADERS_ONCE([unistd.h])
  81   AC_CHECK_FUNCS_ONCE([getlogin_r getpwnam_r])
  82 ])