-# unistd_h.m4 serial 2
-dnl Copyright (C) 2006 Free Software Foundation, Inc.
+# unistd_h.m4 serial 5
+dnl Copyright (C) 2006-2007 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.
-dnl Written by Simon Josefsson
+dnl Written by Simon Josefsson, Bruno Haible.
-AC_DEFUN([gl_HEADER_UNISTD],
+AC_DEFUN([gl_UNISTD_H],
[
- dnl Prerequisites of lib/unistd.h.
- AC_CHECK_HEADERS([unistd.h], [
- UNISTD_H=''
- ], [
- UNISTD_H='unistd.h'
- ])
- AC_SUBST(UNISTD_H)
+ dnl Use AC_REQUIRE here, so that the default behavior below is expanded
+ dnl once only, before all statements that occur in other macros.
+ AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
+
+ AC_CHECK_HEADERS_ONCE([unistd.h])
+ if test $ac_cv_header_unistd_h = yes; then
+ HAVE_UNISTD_H=1
+ gl_ABSOLUTE_HEADER([unistd.h])
+ ABSOLUTE_UNISTD_H=\"$gl_cv_absolute_unistd_h\"
+ else
+ HAVE_UNISTD_H=0
+ fi
+ AC_SUBST([HAVE_UNISTD_H])
+ AC_SUBST([ABSOLUTE_UNISTD_H])
+])
+
+AC_DEFUN([gl_UNISTD_MODULE_INDICATOR],
+[
+ dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
+ AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
+ GNULIB_[]m4_translit([$1],[abcdefghijklmnopqrstuvwxyz./-],[ABCDEFGHIJKLMNOPQRSTUVWXYZ___])=1
+])
+
+AC_DEFUN([gl_UNISTD_H_DEFAULTS],
+[
+ GNULIB_CHOWN=0; AC_SUBST([GNULIB_CHOWN])
+ GNULIB_DUP2=0; AC_SUBST([GNULIB_DUP2])
+ GNULIB_FCHDIR=0; AC_SUBST([GNULIB_FCHDIR])
+ GNULIB_FTRUNCATE=0; AC_SUBST([GNULIB_FTRUNCATE])
+ GNULIB_GETCWD=0; AC_SUBST([GNULIB_GETCWD])
+ GNULIB_GETLOGIN_R=0; AC_SUBST([GNULIB_GETLOGIN_R])
+ GNULIB_READLINK=0; AC_SUBST([GNULIB_READLINK])
+ dnl Assume proper GNU behavior unless another module says otherwise.
+ HAVE_DUP2=1; AC_SUBST([HAVE_DUP2])
+ HAVE_FTRUNCATE=1; AC_SUBST([HAVE_FTRUNCATE])
+ HAVE_READLINK=1; AC_SUBST([HAVE_READLINK])
+ HAVE_DECL_GETLOGIN_R=1; AC_SUBST([HAVE_DECL_GETLOGIN_R])
+ REPLACE_CHOWN=0; AC_SUBST([REPLACE_CHOWN])
+ REPLACE_FCHDIR=0; AC_SUBST([REPLACE_FCHDIR])
+ REPLACE_GETCWD=0; AC_SUBST([REPLACE_GETCWD])
])