1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
|
#! /bin/sh
# Copyright (C) 2011-2017 Free Software Foundation, Inc.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2, or (at your option)
# any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <https://www.gnu.org/licenses/>.
# Test remake rules when a C header "guarded" by AC_SUBST'd variables
# is not needed anymore, or when it's needed again.
# This test requires some user-level machinery, overlaps with other tests,
# and is not strictly necessary per se, but it exercises a real, important
# use case (from gnulib, see:
# <https://lists.gnu.org/archive/html/bug-gnulib/2011-04/msg00005.html>
# for more info).
required=cc
. test-init.sh
cat >> configure.ac <<'END'
AC_CONFIG_MACRO_DIR([.])
AC_CONFIG_HEADERS([config.h])
AC_PROG_CC
MY_MACROS
AC_OUTPUT
END
cat > Makefile.am <<'END'
noinst_PROGRAMS = foo
foo_SOURCES = foo.c
BUILT_SOURCES = $(STDIO_H)
if REPLACE_STDIO_H
stdio.h: stdio.in.h $(top_builddir)/config.status
cp $(srcdir)/stdio.in.h $@
else
stdio.h: $(top_builddir)/config.status
rm -f $@
endif
MOSTLYCLEANFILES = stdio.h
END
cat > macros.m4 <<'END'
AC_DEFUN([MY_MACROS], [
override_stdio=:
if $override_stdio; then
STDIO_H=stdio.h
use_dummies=1
else
STDIO_H=
use_dummies=0
fi
AC_SUBST([STDIO_H])
AC_DEFINE_UNQUOTED([USE_DUMMIES], [$use_dummies],
[Whether to use dummy types.])
AM_CONDITIONAL([REPLACE_STDIO_H], [test -n "$STDIO_H"])
])
END
cat > stdio.in.h <<'END'
typedef struct dummyfile { void *p; } DUMMYFILE;
END
cat > foo.c <<'END'
#include <config.h>
#include <stdio.h>
#if USE_DUMMIES
DUMMYFILE *f;
#else
FILE *f;
#endif
int main () { return 0; }
END
$ACLOCAL
$AUTOHEADER
$AUTOMAKE
$AUTOCONF
for vpath in : false; do
if $vpath; then
mkdir build
cd build
srcdir=..
else
srcdir=.
fi
# Do not reject slow dependency extractors: we need dependency tracking.
$srcdir/configure --enable-dependency-tracking
if $FGREP 'depmode=none' Makefile; then
skip_ "automatic dependency tracking couldn't be activated"
fi
$MAKE
ls -l
test -f stdio.h
# Simulate that we don't need our custom stdio.h anymore.
$sleep
sed -e 's/^\( *override_stdio\)=.*$/\1=false/' $srcdir/macros.m4 > t
diff $srcdir/macros.m4 t && fatal_ "failed to edit macros.m4"
mv -f t $srcdir/macros.m4
using_gmake || $MAKE Makefile
$MAKE
ls -l
test ! -e stdio.h
# And now simulate that we want our custom stdio.h back.
$sleep
sed -e 's/^\( *override_stdio\)=.*$/\1=:/' $srcdir/macros.m4 > t
diff $srcdir/macros.m4 t && fatal_ "failed to edit macros.m4"
mv -f t $srcdir/macros.m4
using_gmake || $MAKE Makefile
$MAKE
ls -l
test -f stdio.h
$MAKE distclean
cd $srcdir
done
:
|
