gcc/testsuite/g++.dg/compat/compat.exp

   1 # Copyright (C) 2002-2018 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_CXX_UNDER_TEST in the environment.
  27
  28 if $tracelevel then {
  29     strace $tracelevel
  30 }
  31
  32 global GXX_UNDER_TEST
  33 global ld_library_path
  34
  35 # Load procedures from common libraries.
  36 load_lib standard.exp
  37 load_lib g++.exp
  38 load_lib target-libpath.exp
  39
  40 #
  41 # compat-use-alt-compiler -- make the alternate compiler the default
  42 #
  43 proc 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         restore_gcc_exec_prefix_env_var
  59     }
  60 }
  61
  62 #
  63 # compat-use-tst-compiler -- make compiler under test the default
  64 #
  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
  70     global same_alt
  71
  72     # We don't need to do this if the alternate compiler is actually
  73     # the same as the compiler under test.
  74
  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
  82     }
  83 }
  84
  85 # Load the language-independent compabibility support procedures.
  86 # This must be done after the compat-use-*-compiler definitions.
  87 load_lib compat.exp
  88
  89 g++_init
  90
  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
  97
  98 # Define an identifier for use with this suite to avoid name conflicts
  99 # with other compat tests running at the same time.
 100 set sid "cp_compat"
 101
 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
 105 # are different.
 106 set use_alt 0
 107 set same_alt 0
 108 set alt_ld_library_path "."
 109 if [info exists ALT_CXX_UNDER_TEST] then {
 110     set use_alt 1
 111     if [string match "same" $ALT_CXX_UNDER_TEST] then {
 112         set same_alt 1
 113     } else {
 114         if [info exists ALT_LD_LIBRARY_PATH] then {
 115             append alt_ld_library_path ":${ALT_LD_LIBRARY_PATH}"
 116         }
 117     }
 118 }
 119
 120 # Main loop.
 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 {
 124         continue
 125     }
 126
 127     compat-execute $src $sid $use_alt
 128 }
 129
 130 # Restore the original compiler under test.
 131 compat-use-tst-compiler