# glob.m4 serial 18

dnl Copyright (C) 2005-2007, 2009-2018 Free Software Foundation, Inc.

dnl This file is free software; the Free Software Foundation

dnl gives unlimited permission to copy and/or distribute it,

dnl with or without modifications, as long as this notice is preserved.

# The glob module assumes you want GNU glob, with glob_pattern_p etc,

# rather than vanilla POSIX glob.  This means your code should

# always include <glob.h> for the glob prototypes.

AC_DEFUN([gl_GLOB],

[

  dnl <glob.h> is always overridden, because of the C++ GNULIB_NAMESPACE.

  gl_CHECK_NEXT_HEADERS([glob.h])

  if test $ac_cv_header_glob_h = yes; then

    REPLACE_GLOB=0

  else

    REPLACE_GLOB=1

  fi

  if test $REPLACE_GLOB = 0; then

    AC_CACHE_CHECK([for GNU glob interface version 1 or 2],

      [gl_cv_gnu_glob_interface_version_1_2],

[     AC_COMPILE_IFELSE([AC_LANG_SOURCE(

[[#include <gnu-versions.h>

char a[_GNU_GLOB_INTERFACE_VERSION == 1 || _GNU_GLOB_INTERFACE_VERSION == 2 ? 1 : -1];]])],

        [gl_cv_gnu_glob_interface_version_1_2=yes],

        [gl_cv_gnu_glob_interface_version_1_2=no])])

    if test "$gl_cv_gnu_glob_interface_version_1_2" = "no"; then

      REPLACE_GLOB=1

    fi

  fi

  if test $REPLACE_GLOB = 0; then

    AC_CACHE_CHECK([whether glob lists broken symlinks],

                   [gl_cv_glob_lists_symlinks],

      [if ln -s conf-doesntexist conf$$-globtest 2>/dev/null; then

         gl_cv_glob_lists_symlinks=maybe

       else

         # If we can't make a symlink, then we cannot test this issue.  Be

         # pessimistic about this.

         gl_cv_glob_lists_symlinks=no

       fi

       if test $gl_cv_glob_lists_symlinks = maybe; then

         AC_RUN_IFELSE([

AC_LANG_PROGRAM(

[[#include <stddef.h>

#include <glob.h>]],

[[glob_t found;

if (glob ("conf*-globtest", 0, NULL, &found) == GLOB_NOMATCH) return 1;]])],

           [gl_cv_glob_lists_symlinks=yes],

           [gl_cv_glob_lists_symlinks=no], [gl_cv_glob_lists_symlinks=no])

       fi

       rm -f conf$$-globtest

      ])

    if test $gl_cv_glob_lists_symlinks = no; then

      REPLACE_GLOB=1

    fi

  fi

  AC_SUBST([REPLACE_GLOB])

])

# Prerequisites of lib/glob.*.

AC_DEFUN([gl_PREREQ_GLOB],

[

  AC_REQUIRE([gl_CHECK_TYPE_STRUCT_DIRENT_D_TYPE])dnl

  AC_REQUIRE([AC_C_RESTRICT])dnl

  AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])dnl

  AC_CHECK_HEADERS_ONCE([unistd.h])dnl

  AC_CHECK_FUNCS_ONCE([getlogin_r getpwnam_r])dnl

])