1#! /bin/sh
2# Copyright (C) 2002-2021 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
35required='libtoolize gcc'
36. test-init.sh
37
38cat >> configure.ac << 'END'
39AC_PROG_CC
40AM_PROG_AR
41AC_PROG_LIBTOOL
42AC_OUTPUT
43END
44
45cat > Makefile.am << 'END'
46check_LTLIBRARIES = librace.la
47librace_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.
50check-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
56END
57
58: >foo.h
59
60for i in a b c d e f g h; do
61  unindent >$i.c <<EOF
62    #include "foo.h"
63    int $i () { return 0; }
64EOF
65done
66
67libtoolize --force
68$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.
74grep am_cv_CC_dependencies_compiler_type configure
75
76./configure am_cv_CC_dependencies_compiler_type=dashmstdout
77
78$MAKE
79test -f librace.la && exit 1
80$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
90test -f librace.la
91test -f tst # A proof that check-local was run.
92
93:
94