1# Copyright (C) 2002-2021 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 22global compat_use_alt 23global compat_same_alt 24global compat_have_dfp 25global compat_skip_list 26 27# This file defines procs for determining features supported by both C 28# compilers for compatibility tests. 29 30load_lib target-supports.exp 31load_lib target-libpath.exp 32 33# 34# compat-use-alt-compiler -- make the alternate compiler the default 35# 36proc 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# 75proc 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. 91proc 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 160proc 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} 167