1 # Copyright (C) 2002-2025 Free Software Foundation, Inc.
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.
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.
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/>.
17 # This file was written by Janis Johnson, <janis187@us.ibm.com>
20 # Test interoperability of two compilers that follow the same ABI.
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.
33 global ld_library_path
35 # Load procedures from common libraries.
38 load_lib target-libpath.exp
41 # compat-use-alt-compiler -- make the alternate compiler the default
43 proc compat-use-alt-compiler { } {
44 global GXX_UNDER_TEST ALT_CXX_UNDER_TEST
46 global ALWAYS_CXXFLAGS
47 global ld_library_path alt_ld_library_path
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
55 set ALWAYS_CXXFLAGS ""
56 set ld_library_path $alt_ld_library_path
57 set_ld_library_path_env_vars
58 restore_gcc_exec_prefix_env_var
63 # compat-use-tst-compiler -- make compiler under test the default
65 proc compat-use-tst-compiler { } {
66 global GXX_UNDER_TEST save_gxx_under_test
67 global CXXFLAGS save_cxxflags
68 global ALWAYS_CXXFLAGS save_always_cxxflags
69 global ld_library_path save_ld_library_path
72 # We don't need to do this if the alternate compiler is actually
73 # the same as the compiler under test.
75 if { $same_alt == 0 } then {
76 set GXX_UNDER_TEST $save_gxx_under_test
77 set CXXFLAGS $save_cxxflags
78 set ALWAYS_CXXFLAGS $save_always_cxxflags
79 set ld_library_path $save_ld_library_path
80 set_ld_library_path_env_vars
81 clear_effective_target_cache
85 # Load the language-independent compabibility support procedures.
86 # This must be done after the compat-use-*-compiler definitions.
91 # Save variables for the C++ compiler under test, which each test will
92 # change a couple of times. This must be done after calling g++-init.
93 set save_gxx_under_test $GXX_UNDER_TEST
94 set save_cxxflags $CXXFLAGS
95 set save_always_cxxflags $ALWAYS_CXXFLAGS
96 set save_ld_library_path $ld_library_path
98 # Define an identifier for use with this suite to avoid name conflicts
99 # with other compat tests running at the same time.
102 # Find out whether there is an alternate compiler to test. If the
103 # variable is defined but is set to "same", that means we use the same
104 # compiler twice, which is meaningful if the two parts of COMPAT_OPTIONS
108 set alt_ld_library_path "."
109 if [info exists ALT_CXX_UNDER_TEST] then {
111 if [string match "same" $ALT_CXX_UNDER_TEST] then {
114 if [info exists ALT_LD_LIBRARY_PATH] then {
115 append alt_ld_library_path ":${ALT_LD_LIBRARY_PATH}"
121 foreach src [lsort [find $srcdir/$subdir *_main.C]] {
122 # If we're only testing specific files and this isn't one of them, skip it.
123 if ![runtest_file_p $runtests $src] then {
127 compat-execute $src $sid $use_alt
130 # Restore the original compiler under test.
131 compat-use-tst-compiler