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# Copyright (C) 1999, 2001 Free Software Foundation, Inc.
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
# Please email any bugs, comments, and/or additions to this file to:
# gcc-patches@gcc.gnu.org
# This file defines procs for determining features supported by the target.
###############################
# proc check_weak_available { }
###############################
# weak symbols are only supported in some configs/object formats
# this proc returns 1 if they're supported, 0 if they're not, or -1 if unsure
proc check_weak_available { } {
global target_cpu
# All mips targets should support it
if { [ string first "mips" $target_cpu ] >= 0 } {
return 1
}
# ELF and ECOFF support it. a.out does with gas/gld but may also with
# other linkers, so we should try it
set objformat [gcc_target_object_format]
switch $objformat {
elf { return 1 }
ecoff { return 1 }
a.out { return 1 }
unknown { return -1 }
default { return 0 }
}
}
###############################
# proc check_alias_available { }
###############################
# Determine if the target toolchain supports the alias attribute.
# Parameter is the pathname of a file that can be used to test the alias support.
# Returns yes if it does.
# Returns no if it does not.
# Returns dontknow if something went wrong
# For an example of the use of this function, see gcc.dg/special/ecos.exp
proc check_alias_available { testfile } {
global alias_available_saved
if [info exists alias_available_saved] {
verbose "check_alias_available returning saved $alias_available_saved" 2
} else {
verbose "check_alias_available compiling testfile $testfile" 2
set lines [gcc_target_compile $testfile "tmp.o" object ""]
if [string match "" $lines] then {
# No error messages, everything is OK.
set alias_available_saved yes
} else {
if [regexp "alias definitions not supported" $lines] {
verbose "check_alias_available target does not support aliases" 2
set objformat [gcc_target_object_format]
if { $objformat == "elf" } {
verbose "check_alias_available but target uses ELF format, so it ought to" 2
set alias_available_saved dontknow
} else {
set alias_available_saved no
}
} else {
if [regexp "only weak aliases are supported" $lines] {
verbose "check_alias_available target supports only weak aliases" 2
set alias_available_saved no
} else {
set alias_available_saved dontknow
}
}
}
verbose "check_alias_available returning $alias_available_saved" 2
}
return $alias_available_saved
}
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