1# Copyright (C) 2002-2019 Free Software Foundation, Inc.
2
3# This program is free software; you can redistribute it and/or modify
4# it under the terms of the GNU General Public License as published by
5# the Free Software Foundation; either version 3 of the License, or
6# (at your option) any later version.
7#
8# This program is distributed in the hope that it will be useful,
9# but WITHOUT ANY WARRANTY; without even the implied warranty of
10# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
11# GNU General Public License for more details.
12#
13# You should have received a copy of the GNU General Public License
14# along with GCC; see the file COPYING3.  If not see
15# <http://www.gnu.org/licenses/>.
16#
17# This file was written by Janis Johnson, <janis187@us.ibm.com>
18
19
20# Test interoperability of two compilers that follow the same ABI.
21#
22# Break simple tests into two pieces and see that they work when linked
23# together.  If an alternate compiler is specified then the two main
24# pieces of each test are compiled with different compilers.  The
25# alternate compiler must be installed, and is specified by defining
26# ALT_CC_UNDER_TEST in the environment.
27
28if $tracelevel then {
29    strace $tracelevel
30}
31
32global GCC_UNDER_TEST
33global ALT_CC_UNDER_TEST
34global compat_save_gcc_under_test
35global compat_use_alt
36global compat_same_alt
37global compat_have_dfp
38
39# Load procedures from common libraries.
40load_lib standard.exp
41load_lib gcc.exp
42
43# Load the language-dependent compatibility support procedures.
44load_lib c-compat.exp
45
46# Load the language-independent compabibility support procedures.
47load_lib compat.exp
48
49gcc_init
50
51# Save variables for the C compiler under test, which each test will
52# change a couple of times.  This must be done after calling gcc-init.
53set compat_save_gcc_under_test $GCC_UNDER_TEST
54
55# Define an identifier for use with this suite to avoid name conflicts
56# with other compat tests running at the same time.
57set sid "c_compat"
58
59# Find out whether there is an alternate compiler to test.  If the
60# variable is defined but is set to "same", that means we use the same
61# compiler twice, which is meaningful if the two parts of COMPAT_OPTIONS
62# are different.
63set compat_use_alt 0
64set compat_same_alt 0
65
66if [info exists ALT_CC_UNDER_TEST] then {
67    set compat_use_alt 1
68    if [string match "same" $ALT_CC_UNDER_TEST] then {
69	set compat_same_alt 1
70    }
71}
72
73compat_setup_dfp
74
75# Main loop.
76foreach src [lsort [find $srcdir/$subdir *_main.c]] {
77    # If we're only testing specific files and this isn't one of them, skip it.
78    if ![runtest_file_p $runtests $src] then {
79	continue
80    }
81
82    compat-execute $src $sid $compat_use_alt
83}
84
85# Restore the original compiler under test.
86compat-use-tst-compiler
87