t/pr307.sh

   1 #! /bin/sh
   2 # Copyright (C) 2002-2024 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 <https://www.gnu.org/licenses/>.
  16
  17 # Test for PR 307: depcomp with depmode=dashmstdout libtool race condition
  18 # Report from Laurent Morichetti.
  19 # (Also exercises check_LTLIBRARIES.)
  20 #
  21 # == Report ==
  22 #  The dashmstdout depmode calls libtool in parallel to generate the
  23 #  dependencies (with -M flag) and to build the objfile (both have
  24 #  --mode=compile and -o).
  25 #  The process with 'libtool --mode=compile .* -M' can corrupt the objfile
  26 #  as none is generated by the compiler.  Since --mode=compile and -o are
  27 #  set libtool assumes that a objfile should be generated and will execute
  28 #  invalid $mv & $LN_S.
  29 #
  30 # == Fix ==
  31 #  Now 'depcomp' never compute dependencies in the background, as this can
  32 #  cause races with libtool.  Compute the dependencies after the actual
  33 #  compilation.
  34
  35 required='libtoolize gcc'
  36 . test-init.sh
  37
  38 cat >> configure.ac << 'END'
  39 AC_PROG_CC
  40 AM_PROG_AR
  41 AC_PROG_LIBTOOL
  42 AC_OUTPUT
  43 END
  44
  45 cat > Makefile.am << 'END'
  46 check_LTLIBRARIES = librace.la
  47 librace_la_SOURCES = a.c b.c c.c d.c e.c f.c g.c h.c
  48
  49 # Make sure the dependencies are updated.
  50 check-local:
  51         for i in $(librace_la_SOURCES:.c=.Plo); do \
  52           echo "checking ./$(DEPDIR)/$$i"; \
  53           grep 'foo\.h' ./$(DEPDIR)/$$i >tst || exit 1; \
  54           test `wc -l <tst` -eq 2 || exit 1; \
  55         done
  56 END
  57
  58 : >foo.h
  59
  60 for i in a b c d e f g h; do
  61   unindent >$i.c <<EOF
  62     #include "foo.h"
  63     int $i () { return 0; }
  64 EOF
  65 done
  66
  67 libtoolize --force
  68 $ACLOCAL
  69 $AUTOCONF
  70 $AUTOMAKE -a
  71
  72 # Sanity check: make sure the variable we are attempting to force
  73 # is indeed used by configure.
  74 grep am_cv_CC_dependencies_compiler_type configure
  75
  76 ./configure am_cv_CC_dependencies_compiler_type=dashmstdout
  77
  78 $MAKE
  79 test -f librace.la && exit 1
  80 $MAKE check
  81
  82 # The failure we check usually occurs during the above build,
  83 # with an output such as:
  84 #
  85 #   mv -f .libs/f.lo f.lo
  86 #   mv: cannot stat '.libs/f.lo': No such file or directory
  87 #
  88 # (This may happen on 'f' or on some other files.)
  89
  90 test -f librace.la
  91 test -f tst # A proof that check-local was run.
  92
  93 :