gcc/testsuite/lib/c-compat.exp

   1 # Copyright (C) 2002-2024 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 compat_alt_urls compat_alt_plain_output
  40     global TEST_ALWAYS_FLAGS
  41
  42     # We don't need to do this if the alternate compiler is actually
  43     # the same as the compiler under test.
  44     if { $compat_same_alt == 0 } then {
  45         set GCC_UNDER_TEST $ALT_CC_UNDER_TEST
  46
  47         # These flags are no longer added to TEST_ALWAYS_FLAGS by prune.exp
  48         # because they are subsumed by -fdiagnostics-plain-output. Add them back
  49         # for compatibility testing with older compilers that do not understand
  50         # -fdiagnostics-plain-output.
  51         set TEST_ALWAYS_FLAGS "-fno-diagnostics-show-caret -fno-diagnostics-show-line-numbers -fdiagnostics-color=never -fdiagnostics-urls=never $TEST_ALWAYS_FLAGS"
  52
  53         if { $compat_alt_caret == 0 } then {
  54             regsub -all -- "-fno-diagnostics-show-caret" $TEST_ALWAYS_FLAGS "" TEST_ALWAYS_FLAGS
  55         }
  56         if { $compat_alt_color == 0 } then {
  57             regsub -all -- "-fdiagnostics-color=never" $TEST_ALWAYS_FLAGS "" TEST_ALWAYS_FLAGS
  58         }
  59         if { $compat_alt_urls == 0 } then {
  60             regsub -all -- "-fdiagnostics-urls=never" $TEST_ALWAYS_FLAGS "" TEST_ALWAYS_FLAGS
  61         }
  62         if { $compat_no_line_no == 0 } then {
  63             regsub -all -- "-fno-diagnostics-show-line-numbers" $TEST_ALWAYS_FLAGS "" TEST_ALWAYS_FLAGS
  64         }
  65         if { $compat_alt_plain_output == 0 } then {
  66             regsub -all -- "-fdiagnostics-plain-output" $TEST_ALWAYS_FLAGS "" TEST_ALWAYS_FLAGS
  67         }
  68         restore_gcc_exec_prefix_env_var
  69     }
  70 }
  71
  72 #
  73 # compat-use-tst-compiler -- make compiler under test the default
  74 #
  75 proc compat-use-tst-compiler { } {
  76     global GCC_UNDER_TEST compat_save_gcc_under_test
  77     global compat_same_alt
  78     global TEST_ALWAYS_FLAGS compat_save_TEST_ALWAYS_FLAGS
  79
  80     # We don't need to do this if the alternate compiler is actually
  81     # the same as the compiler under test.
  82
  83     if { $compat_same_alt == 0 } then {
  84         set GCC_UNDER_TEST $compat_save_gcc_under_test
  85         set TEST_ALWAYS_FLAGS $compat_save_TEST_ALWAYS_FLAGS
  86         set_gcc_exec_prefix_env_var
  87     }
  88 }
  89
  90 # Find out whether both compilers support decimal float types.
  91 proc compat_setup_dfp { } {
  92     global compat_use_alt
  93     global compat_same_alt
  94     global compat_have_dfp
  95     global compat_alt_caret
  96     global compat_alt_color
  97     global compat_alt_urls
  98     global compat_alt_plain_output
  99     global compat_no_line_no
 100     global TEST_ALWAYS_FLAGS compat_save_TEST_ALWAYS_FLAGS
 101
 102     set compat_alt_caret 0
 103     set compat_alt_color 0
 104     set compat_alt_urls 0
 105     set compat_alt_plain_output 0
 106     set compat_no_line_no 0
 107     set compat_save_TEST_ALWAYS_FLAGS $TEST_ALWAYS_FLAGS
 108
 109     verbose "compat_setup_dfp: $compat_use_alt $compat_same_alt" 2
 110
 111     # Does the compiler under test support decimal float types?
 112     compat-use-tst-compiler
 113     set compat_have_dfp [check_effective_target_dfprt_nocache]
 114     verbose "compat_have_dfp for tst compiler: $compat_have_dfp" 2
 115
 116     if { $compat_use_alt == 1 && $compat_same_alt == 0 } {
 117         compat-use-alt-compiler
 118         if { [check_no_compiler_messages_nocache compat_alt_has_caret object {
 119                 int dummy; } "-fno-diagnostics-show-caret"] != 0 } {
 120             set compat_alt_caret 1
 121         }
 122         if { [check_no_compiler_messages_nocache compat_alt_has_color object {
 123                 int dummy; } "-fdiagnostics-color=never"] != 0 } {
 124             set compat_alt_color 1
 125         }
 126         if { [check_no_compiler_messages_nocache compat_alt_has_urls object {
 127                 int dummy; } "-fdiagnostics-urls=never"] != 0 } {
 128             set compat_alt_urls 1
 129         }
 130         if { [check_no_compiler_messages_nocache compat_alt_has_no_line_no object {
 131                 int dummy; } "-fno-diagnostics-show-line-numbers"] != 0 } {
 132             set compat_no_line_no 1
 133         }
 134         if { [check_no_compiler_messages_nocache compat_alt_has_plain_output object {
 135                 int dummy; } "-fdiagnostics-plain-output"] != 0 } {
 136             set compat_alt_plain_output 1
 137         }
 138
 139         compat-use-tst-compiler
 140     }
 141
 142     # If there is an alternate compiler, does it support decimal float types?
 143     if { $compat_have_dfp == 1 && $compat_use_alt == 1 && $compat_same_alt == 0 } {
 144         compat-use-alt-compiler
 145         set compat_have_dfp [check_effective_target_dfprt_nocache]
 146         compat-use-tst-compiler
 147         verbose "compat_have_dfp for alt compiler: $compat_have_dfp" 2
 148     }
 149
 150     # If decimal float is not supported, add it to the skip list, which
 151     # affects code in the header files.
 152     if { $compat_have_dfp == 0 } {
 153         global compat_skip_list
 154         lappend compat_skip_list "DECIMAL_FLOAT"
 155     }
 156 }
 157
 158 # If either compiler does not support decimal float types, skip this test.
 159
 160 proc dg-require-compat-dfp { args } {
 161     global compat_have_dfp
 162     if { $compat_have_dfp == 0 } {
 163         upvar dg-do-what dg-do-what
 164         set dg-do-what [list [lindex ${dg-do-what} 0] "N" "P"]
 165     }
 166 }