new module 'dirent'

[Bruno Haible]

As a preparation for next patches, it's useful to separate the 'dirent.h'
header file module from the 'fchdir' function's module. I'm committing this:


2008-10-18  Bruno Haible  <address@hidden>

        * modules/dirent: New file.
        * m4/dirent_h.m4: New file.
        * m4/fchdir.m4 (gl_FUNC_FCHDIR): Require gl_DIRENT_H_DEFAULTS.
        Invoke gl_REPLACE_DIRENT_H. Don't assign DIRENT_H directly.
        * modules/fchdir (Files): Remove lib/dirent.in.h.
        (Depends-on): Add dirent.
        (Makefile.am): Move rules to modules/dirent.
        * doc/posix-headers/dirent.texi: Mention the new module.

========================== modules/dirent =================================
Description:
A GNU-like <dirent.h>.

Files:
lib/dirent.in.h
m4/dirent_h.m4
m4/unistd_h.m4

Depends-on:
include_next

configure.ac:
gl_DIRENT_H

Makefile.am:
BUILT_SOURCES += $(DIRENT_H)

# We need the following in order to create <dirent.h> when the system
# doesn't have one that works with the given compiler.
dirent.h: dirent.in.h
        rm -f address@hidden $@
        { echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
          sed -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
              -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
              -e 's|@''NEXT_DIRENT_H''@|$(NEXT_DIRENT_H)|g' \
              -e 's|@''REPLACE_FCHDIR''@|$(REPLACE_FCHDIR)|g' \
              < $(srcdir)/dirent.in.h; \
        } > address@hidden
        mv address@hidden $@
MOSTLYCLEANFILES += dirent.h dirent.h-t

Include:
#include <dirent.h>

License:
LGPLv2+

Maintainer:
all
========================== m4/dirent_h.m4 =================================
# dirent_h.m4 serial 1
dnl Copyright (C) 2008 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 Bruno Haible.

AC_DEFUN([gl_DIRENT_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_DIRENT_H_DEFAULTS])

  gl_CHECK_NEXT_HEADERS([dirent.h])
])

dnl Unconditionally enables the replacement of <dirent.h>.
AC_DEFUN([gl_REPLACE_DIRENT_H],
[
  AC_REQUIRE([gl_DIRENT_H_DEFAULTS])
  DIRENT_H='dirent.h'
])

AC_DEFUN([gl_DIRENT_MODULE_INDICATOR],
[
  dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
  AC_REQUIRE([gl_DIRENT_H_DEFAULTS])
  
GNULIB_[]m4_translit([$1],[abcdefghijklmnopqrstuvwxyz./-],[ABCDEFGHIJKLMNOPQRSTUVWXYZ___])=1
])

AC_DEFUN([gl_DIRENT_H_DEFAULTS],
[
  AC_REQUIRE([gl_UNISTD_H_DEFAULTS]) dnl for REPLACE_FCHDIR
  dnl Assume proper GNU behavior unless another module says otherwise.
  DIRENT_H='';      AC_SUBST([DIRENT_H])
])
===========================================================================
*** doc/posix-headers/dirent.texi.orig  2008-10-19 01:40:39.000000000 +0200
--- doc/posix-headers/dirent.texi       2008-10-19 01:33:52.000000000 +0200
***************
*** 3,9 ****
  
  POSIX specification: @url{http://www.opengroup.org/susv3xbd/dirent.h.html}
  
! Gnulib module: ---
  
  Portability problems fixed by Gnulib:
  @itemize
--- 3,9 ----
  
  POSIX specification: @url{http://www.opengroup.org/susv3xbd/dirent.h.html}
  
! Gnulib module: dirent
  
  Portability problems fixed by Gnulib:
  @itemize
*** lib/dirent.in.h.orig        2008-10-19 01:40:39.000000000 +0200
--- lib/dirent.in.h     2008-10-19 01:18:18.000000000 +0200
***************
*** 1,4 ****
! /* Wrapper around <dirent.h>.
     Copyright (C) 2006-2008 Free Software Foundation, Inc.
  
     This program is free software: you can redistribute it and/or modify
--- 1,4 ----
! /* A GNU-like <dirent.h>.
     Copyright (C) 2006-2008 Free Software Foundation, Inc.
  
     This program is free software: you can redistribute it and/or modify
*** m4/fchdir.m4.orig   2008-10-19 01:40:39.000000000 +0200
--- m4/fchdir.m4        2008-10-19 01:29:26.000000000 +0200
***************
*** 1,4 ****
! # fchdir.m4 serial 5
  dnl Copyright (C) 2006-2008 Free Software Foundation, Inc.
  dnl This file is free software; the Free Software Foundation
  dnl gives unlimited permission to copy and/or distribute it,
--- 1,4 ----
! # fchdir.m4 serial 6
  dnl Copyright (C) 2006-2008 Free Software Foundation, Inc.
  dnl This file is free software; the Free Software Foundation
  dnl gives unlimited permission to copy and/or distribute it,
***************
*** 7,12 ****
--- 7,13 ----
  AC_DEFUN([gl_FUNC_FCHDIR],
  [
    AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
+   AC_REQUIRE([gl_DIRENT_H_DEFAULTS])
    AC_CHECK_FUNCS_ONCE([fchdir])
    if test $ac_cv_func_fchdir = no; then
      REPLACE_FCHDIR=1
***************
*** 16,27 ****
        [Define if gnulib's fchdir() replacement is used.])
      gl_REPLACE_OPEN
      gl_REPLACE_CLOSE
!     gl_CHECK_NEXT_HEADERS([dirent.h])
!     DIRENT_H='dirent.h'
!   else
!     DIRENT_H=
    fi
-   AC_SUBST([DIRENT_H])
  ])
  
  # Prerequisites of lib/fchdir.c.
--- 17,24 ----
        [Define if gnulib's fchdir() replacement is used.])
      gl_REPLACE_OPEN
      gl_REPLACE_CLOSE
!     gl_REPLACE_DIRENT_H
    fi
  ])
  
  # Prerequisites of lib/fchdir.c.
*** modules/fchdir.orig 2008-10-19 01:40:39.000000000 +0200
--- modules/fchdir      2008-10-19 01:18:08.000000000 +0200
***************
*** 3,14 ****
  
  Files:
  lib/fchdir.c
- lib/dirent.in.h
  m4/fchdir.m4
  
  Depends-on:
  canonicalize-lgpl
  close
  dirfd
  dup2
  fcntl
--- 3,14 ----
  
  Files:
  lib/fchdir.c
  m4/fchdir.m4
  
  Depends-on:
  canonicalize-lgpl
  close
+ dirent
  dirfd
  dup2
  fcntl
***************
*** 22,42 ****
  gl_UNISTD_MODULE_INDICATOR([fchdir])
  
  Makefile.am:
- BUILT_SOURCES += $(DIRENT_H)
- 
- # We need the following in order to create <dirent.h> when the system
- # doesn't have one that works with the given compiler.
- dirent.h: dirent.in.h
-       rm -f address@hidden $@
-       { echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
-         sed -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
-             -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
-             -e 's|@''NEXT_DIRENT_H''@|$(NEXT_DIRENT_H)|g' \
-             -e 's|@''REPLACE_FCHDIR''@|$(REPLACE_FCHDIR)|g' \
-             < $(srcdir)/dirent.in.h; \
-       } > address@hidden
-       mv address@hidden $@
- MOSTLYCLEANFILES += dirent.h dirent.h-t
  
  Include:
  #include <unistd.h>
--- 22,27 ----