tests/cond29.test

   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 # Check that many conditions do not lead to combinatorial explosion.
  18 # (This is related to PR/352.)
  19
  20 . ./defs || Exit 1
  21
  22 echo AC_PROG_CC >>configure.in
  23
  24 cat >Makefile.am <<EOF
  25 bin_PROGRAMS = a
  26 a02_LDADD =
  27 a03_SOURCES =
  28 EOF
  29
  30 # On this test, Automake 1.7.x would compute all 2**24 = 16777216
  31 # possible combinations of conditionals (it would do this five times,
  32 # to define a01_DEPENDENCIES, a02_DEPENDENCIES, a03_OBJECTS,
  33 # a04_OBJECTS, and to rewrite bin_PROGRAM), eating all memory, swap,
  34 # or cpu time it can found.
  35 # Limit memory available to spawned processes to ~ 150 MB.  Considering
  36 # that 70 MB is enough for x86_64 Fedora 16, that gives tools and
  37 # libraries plenty of room to grow.  Suggested by Jim Meyering in
  38 # automake bug#10374.
  39 (ulimit -v 1; sh -c ":") && skip_ "no adequate 'ulimit' builtin found"
  40 (ulimit -v 150000; sh -c ":") || skip_ "no adequate 'ulimit' builtin found"
  41 ulimit -v 150000
  42
  43 for i in \
  44   01 02 03 04 05 06 07 08 09 10 \
  45   11 12 13 14 15 16 17 18 19 20 \
  46   21 22 23 24
  47 do
  48   unindent >>Makefile.am <<EOF
  49     if C$i
  50     bin_PROGRAMS += a$i
  51     a01_LDADD = foo${i}.o
  52     a02_LDADD += bar${i}.o
  53     a03_SOURCES += baz${i}.c
  54     a04_SOURCES = quux${i}.c
  55     endif C$i
  56 EOF
  57   echo "AM_CONDITIONAL([C$i], [:])" >>configure.in
  58 done
  59
  60 $ACLOCAL
  61 $AUTOMAKE
  62
  63 :