gcc/testsuite/lib/c-compat.exp

   1 # Copyright (C) 2002-2020 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 # Please email any bugs, comments, and/or additions to this file to:
  18 # gcc-patches@gcc.gnu.org
  19
  20 # Globals.
  21
  22 global compat_use_alt
  23 global compat_same_alt
  24 global compat_have_dfp
  25 global compat_skip_list
  26
  27 # This file defines procs for determining features supported by both C
  28 # compilers for compatibility tests.
  29
  30 load_lib target-supports.exp
  31 load_lib target-libpath.exp
  32
  33 #
  34 # compat-use-alt-compiler -- make the alternate compiler the default
  35 #
  36 proc compat-use-alt-compiler { } {
  37     global GCC_UNDER_TEST ALT_CC_UNDER_TEST
  38     global compat_same_alt compat_alt_caret compat_alt_color compat_no_line_no
  39     global TEST_ALWAYS_FLAGS
  40
  41     # We don't need to do this if the alternate compiler is actually
  42     # the same as the compiler under test.
  43     if { $compat_same_alt == 0 } then {
  44         set GCC_UNDER_TEST $ALT_CC_UNDER_TEST
  45         if { $compat_alt_caret == 0 } then {
  46             regsub -- "-fno-diagnostics-show-caret" $TEST_ALWAYS_FLAGS "" TEST_ALWAYS_FLAGS
  47         }
  48         if { $compat_alt_color == 0 } then {
  49             regsub -- "-fdiagnostics-color=never" $TEST_ALWAYS_FLAGS "" TEST_ALWAYS_FLAGS
  50         }
  51         if { $compat_no_line_no == 0 } then {
  52             regsub -- "-fno-diagnostics-show-line-numbers" $TEST_ALWAYS_FLAGS "" TEST_ALWAYS_FLAGS
  53         }
  54         restore_gcc_exec_prefix_env_var
  55     }
  56 }
  57
  58 #
  59 # compat-use-tst-compiler -- make compiler under test the default
  60 #
  61 proc compat-use-tst-compiler { } {
  62     global GCC_UNDER_TEST compat_save_gcc_under_test
  63     global compat_same_alt
  64     global TEST_ALWAYS_FLAGS compat_save_TEST_ALWAYS_FLAGS
  65
  66     # We don't need to do this if the alternate compiler is actually
  67     # the same as the compiler under test.
  68
  69     if { $compat_same_alt == 0 } then {
  70         set GCC_UNDER_TEST $compat_save_gcc_under_test
  71         set TEST_ALWAYS_FLAGS $compat_save_TEST_ALWAYS_FLAGS
  72         set_gcc_exec_prefix_env_var
  73     }
  74 }
  75
  76 # Find out whether both compilers support decimal float types.
  77 proc compat_setup_dfp { } {
  78     global compat_use_alt
  79     global compat_same_alt
  80     global compat_have_dfp
  81     global compat_alt_caret
  82     global compat_alt_color
  83     global compat_no_line_no
  84     global TEST_ALWAYS_FLAGS compat_save_TEST_ALWAYS_FLAGS
  85
  86     set compat_alt_caret 0
  87     set compat_alt_color 0
  88     set compat_no_line_no 0
  89     set compat_save_TEST_ALWAYS_FLAGS $TEST_ALWAYS_FLAGS
  90
  91     verbose "compat_setup_dfp: $compat_use_alt $compat_same_alt" 2
  92
  93     # Does the compiler under test support decimal float types?
  94     compat-use-tst-compiler
  95     set compat_have_dfp [check_effective_target_dfprt_nocache]
  96     verbose "compat_have_dfp for tst compiler: $compat_have_dfp" 2
  97
  98     if { $compat_use_alt == 1 && $compat_same_alt == 0 } {
  99         compat-use-alt-compiler
 100         if { [check_no_compiler_messages_nocache compat_alt_has_caret object {
 101                 int dummy; } "-fno-diagnostics-show-caret"] != 0 } {
 102             set compat_alt_caret 1
 103         }
 104         if { [check_no_compiler_messages_nocache compat_alt_has_color object {
 105                 int dummy; } "-fdiagnostics-color=never"] != 0 } {
 106             set compat_alt_color 1
 107         }
 108         if { [check_no_compiler_messages_nocache compat_alt_has_no_line_no object {
 109                 int dummy; } "-fno-diagnostics-show-line-numbers"] != 0 } {
 110             set compat_no_line_no 1
 111         }
 112
 113         compat-use-tst-compiler
 114     }
 115
 116     # If there is an alternate compiler, does it support decimal float types?
 117     if { $compat_have_dfp == 1 && $compat_use_alt == 1 && $compat_same_alt == 0 } {
 118         compat-use-alt-compiler
 119         set compat_have_dfp [check_effective_target_dfprt_nocache]
 120         compat-use-tst-compiler
 121         verbose "compat_have_dfp for alt compiler: $compat_have_dfp" 2
 122     }
 123
 124     # If decimal float is not supported, add it to the skip list, which
 125     # affects code in the header files.
 126     if { $compat_have_dfp == 0 } {
 127         global compat_skip_list
 128         lappend compat_skip_list "DECIMAL_FLOAT"
 129     }
 130 }
 131
 132 # If either compiler does not support decimal float types, skip this test.
 133
 134 proc dg-require-compat-dfp { args } {
 135     global compat_have_dfp
 136     if { $compat_have_dfp == 0 } {
 137         upvar dg-do-what dg-do-what
 138         set dg-do-what [list [lindex ${dg-do-what} 0] "N" "P"]
 139     }
 140 }