1# Copyright (C) 2002, 2004 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 2 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 this program; if not, write to the Free Software
15# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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_CXX_UNDER_TEST in the environment.
27
28if $tracelevel then {
29    strace $tracelevel
30}
31
32global GXX_UNDER_TEST
33global ld_library_path
34
35# Load procedures from common libraries.
36load_lib standard.exp
37load_lib g++.exp
38load_lib target-libpath.exp
39
40#
41# compat-use-alt-compiler -- make the alternate compiler the default
42#
43proc compat-use-alt-compiler { } {
44    global GXX_UNDER_TEST ALT_CXX_UNDER_TEST
45    global CXXFLAGS
46    global ALWAYS_CXXFLAGS
47    global ld_library_path alt_ld_library_path
48    global same_alt
49
50    # We don't need to do this if the alternate compiler is actually
51    # the same as the compiler under test.
52    if { $same_alt == 0 } then {
53	set GXX_UNDER_TEST $ALT_CXX_UNDER_TEST
54	set CXXFLAGS ""
55	set ALWAYS_CXXFLAGS ""
56	set ld_library_path $alt_ld_library_path
57	set_ld_library_path_env_vars
58    }
59}
60
61#
62# compat-use-tst-compiler -- make compiler under test the default
63#
64proc compat-use-tst-compiler { } {
65    global GXX_UNDER_TEST save_gxx_under_test
66    global CXXFLAGS save_cxxflags
67    global ALWAYS_CXXFLAGS save_always_cxxflags
68    global ld_library_path save_ld_library_path
69    global same_alt
70
71    # We don't need to do this if the alternate compiler is actually
72    # the same as the compiler under test.
73
74    if { $same_alt == 0 } then {
75	set GXX_UNDER_TEST $save_gxx_under_test
76	set CXXFLAGS $save_cxxflags
77	set ALWAYS_CXXFLAGS $save_always_cxxflags
78	set ld_library_path $save_ld_library_path
79	set_ld_library_path_env_vars
80    }
81}
82
83# Load the language-independent compabibility support procedures.
84# This must be done after the compat-use-*-compiler definitions.
85load_lib compat.exp
86
87g++_init
88
89# Save variables for the C++ compiler under test, which each test will
90# change a couple of times.  This must be done after calling g++-init.
91set save_gxx_under_test $GXX_UNDER_TEST
92set save_cxxflags $CXXFLAGS
93set save_always_cxxflags $ALWAYS_CXXFLAGS
94set save_ld_library_path $ld_library_path
95
96# Define an identifier for use with this suite to avoid name conflicts
97# with other compat tests running at the same time.
98set sid "cp_compat"
99
100# Find out whether there is an alternate compiler to test.  If the
101# variable is defined but is set to "same", that means we use the same
102# compiler twice, which is meaningful if the two parts of COMPAT_OPTIONS
103# are different.
104set use_alt 0
105set same_alt 0
106set alt_ld_library_path "."
107if [info exists ALT_CXX_UNDER_TEST] then {
108    set use_alt 1
109    if [string match "same" $ALT_CXX_UNDER_TEST] then {
110	set same_alt 1
111    } else {
112	if [info exists ALT_LD_LIBRARY_PATH] then {
113	    append alt_ld_library_path ":${ALT_LD_LIBRARY_PATH}"
114	}
115    }
116}
117
118# Main loop.
119foreach src [lsort [find $srcdir/$subdir *_main.C]] {
120    # If we're only testing specific files and this isn't one of them, skip it.
121    if ![runtest_file_p $runtests $src] then {
122	continue
123    }
124
125    compat-execute $src $sid $use_alt
126}
127
128# Restore the original compiler under test.
129compat-use-tst-compiler
130