1 # Copyright (C) 1999, 2001 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 2 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 this program; if not, write to the Free Software
15 # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
17 # Please email any bugs, comments, and/or additions to this file to:
18 # gcc-patches@gcc.gnu.org
20 # This file defines procs for determining features supported by the target.
22 ###############################
23 # proc check_weak_available { }
24 ###############################
26 # weak symbols are only supported in some configs/object formats
27 # this proc returns 1 if they're supported, 0 if they're not, or -1 if unsure
29 proc check_weak_available { } {
33 # All mips targets should support it
35 if { [ string first "mips" $target_cpu ] >= 0 } {
39 # DEC OSF/1/Digital UNIX/Tru64 UNIX supports it
41 if { [regexp "alpha.*osf.*" $target_triplet] } {
45 # ELF and ECOFF support it. a.out does with gas/gld but may also with
46 # other linkers, so we should try it
48 set objformat [gcc_target_object_format]
59 ###############################
60 # proc check_alias_available { }
61 ###############################
63 # Determine if the target toolchain supports the alias attribute.
64 # Parameter is the pathname of a file that can be used to test the alias support.
65 # Returns yes if it does.
66 # Returns no if it does not.
67 # Returns dontknow if something went wrong
68 # For an example of the use of this function, see gcc.dg/special/ecos.exp
70 proc check_alias_available { testfile } {
71 global alias_available_saved
73 if [info exists alias_available_saved] {
74 verbose "check_alias_available returning saved $alias_available_saved" 2
76 verbose "check_alias_available compiling testfile $testfile" 2
77 set lines [gcc_target_compile $testfile "tmp.o" object ""]
79 if [string match "" $lines] then {
80 # No error messages, everything is OK.
81 set alias_available_saved yes
83 if [regexp "alias definitions not supported" $lines] {
84 verbose "check_alias_available target does not support aliases" 2
86 set objformat [gcc_target_object_format]
88 if { $objformat == "elf" } {
89 verbose "check_alias_available but target uses ELF format, so it ought to" 2
90 set alias_available_saved dontknow
92 set alias_available_saved no
95 if [regexp "only weak aliases are supported" $lines] {
96 verbose "check_alias_available target supports only weak aliases" 2
97 set alias_available_saved no
99 set alias_available_saved dontknow
104 verbose "check_alias_available returning $alias_available_saved" 2
107 return $alias_available_saved