t/aclocal7.sh

   1 #! /bin/sh
   2 # Copyright (C) 2003-2012 Free Software Foundation, Inc.
   3 #
   4 # This program is free software; you can redistribute it and/or modify
   5 # it under the terms of the GNU General Public License as published by
   6 # the Free Software Foundation; either version 2, or (at your option)
   7 # any later version.
   8 #
   9 # This program is distributed in the hope that it will be useful,
  10 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 # GNU General Public License for more details.
  13 #
  14 # You should have received a copy of the GNU General Public License
  15 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16
  17 # Make sure aclocal does not overwrite aclocal.m4 needlessly.
  18 # Also make sure automake --no-force does not overwrite Makefile.in needlessly.
  19
  20 . ./defs || exit 1
  21
  22 cat >> configure.ac << 'END'
  23 SOME_DEFS
  24 AC_CONFIG_FILES([sub/Makefile])
  25 END
  26
  27 mkdir sub
  28 : > sub/Makefile.am
  29
  30 cat >> Makefile.am << 'END'
  31 SUBDIRS = sub
  32 include fragment.inc
  33 END
  34
  35 : > fragment.inc
  36
  37 mkdir m4
  38 echo 'AC_DEFUN([SOME_DEFS], [])' > m4/somedefs.m4
  39
  40 # Automake will take aclocal.m4 to be newer if it has the same timestamp
  41 # as Makefile.in.  Avoid the confusing by sleeping.
  42 AUTOMAKE_after_aclocal ()
  43 {
  44   $sleep
  45   $AUTOMAKE --no-force
  46 }
  47
  48 # aclocal will rewrite aclocal.m4 unless the input files are all older than the
  49 # existing aclocal.m4 -- sleep to ensure somedefs.m4 has an older timestamp
  50 # than the aclocal.m4 that the next aclocal call will generate.
  51 $sleep
  52
  53 $ACLOCAL -I m4
  54 AUTOMAKE_after_aclocal
  55
  56 touch foo
  57 $sleep
  58 $ACLOCAL -I m4
  59 AUTOMAKE_after_aclocal
  60 # aclocal.m4 and Makefile.in should not have been updated, so 'foo'
  61 # should be younger
  62 is_newest foo aclocal.m4 Makefile.in sub/Makefile.in
  63
  64 $sleep
  65 $ACLOCAL -I m4 --force
  66 is_newest aclocal.m4 foo
  67 # We still use --no-force for automake, but since aclocal.m4 has
  68 # changed all Makefile.ins should be updated.
  69 AUTOMAKE_after_aclocal
  70 is_newest Makefile.in aclocal.m4 foo
  71 is_newest sub/Makefile.in aclocal.m4 foo
  72
  73 $sleep
  74 touch m4/somedefs.m4
  75 $sleep
  76 $ACLOCAL -I m4
  77 AUTOMAKE_after_aclocal
  78 # aclocal.m4 should have been updated, although its contents haven't
  79 # changed.
  80 is_newest aclocal.m4 m4/somedefs.m4
  81 is_newest Makefile.in m4/somedefs.m4
  82 is_newest sub/Makefile.in m4/somedefs.m4
  83
  84 $sleep
  85 touch fragment.inc
  86 $sleep
  87 $ACLOCAL -I m4
  88 AUTOMAKE_after_aclocal
  89 # Only ./Makefile.in should change.
  90 is_newest Makefile.in fragment.inc
  91 is_newest fragment.inc aclocal.m4
  92 is_newest fragment.inc sub/Makefile.in
  93
  94 grep README Makefile.in && exit 1
  95
  96 $sleep
  97 : > README
  98 $sleep
  99 $AUTOMAKE --no-force
 100 # Even if no dependency change, the content changed.
 101 is_newest Makefile.in README
 102 is_newest README sub/Makefile.in
 103
 104 grep README Makefile.in
 105
 106 : > sub/Makefile.in
 107 $sleep
 108 touch foo
 109 $sleep
 110 $ACLOCAL -I m4
 111 $AUTOMAKE --no-force
 112 # Only sub/Makefile.in should change.
 113 is_newest foo aclocal.m4
 114 is_newest foo Makefile.in
 115 is_newest sub/Makefile.in foo
 116
 117 :