linkage.exp

gcc-you can use this code to learn something about gcc, and inquire further into linux,

# Copyright (C) 1988, 90-96, 1997, 2000, 2001, 2002 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.  

# This file used to be gcc.c-torture/special/special.exp, which
# was written by Rob Savoye. ([e-mail])
# All the other tests driven by that file have since been moved elsewhere.

if [isnative] then {
    set lines [gcc_target_compile "$srcdir/$subdir/linkage-x.c" "linkage-x.o" object {additional_flags="-w"}]
    if ![string match "" $lines] then {
	fail "linkage.c"
    } else {
	# This is a completely bogus test. Sorry.

	# Need to ensure ABI for native compiler matches gcc
	set native_cflags ""
	if  [istarget "mips-sgi-irix6*"] {
	    set file_string [exec file "linkage-x.o"]
	    if [ string match "*64*" $file_string ] {
		set native_cflags "-64"
	    }
	    if [ string match "*ELF 32*" $file_string ] {
		set native_cflags "-32"
	    }
	    if [ string match "*N32*" $file_string ] {
		set native_cflags "-n32"
	    }
	}
	if  [istarget "mips-sgi-iris6*o32" ] {
	    set native_cflags "-32"
	}
	if  [istarget "sparc*-sun-solaris2*"] {
	    set file_string [exec file "linkage-x.o"]
	    if [ string match "*64*" $file_string ] {
		set native_cflags "-xarch=v9"
	    }
	}
	if [istarget "s390x-*-linux*"] {
	    set file_string [exec file "linkage-x.o"]
	    if [ string match "*32-bit*" $file_string ] {
		set native_cflags "-m31"
	    }
	}

	catch { exec rm -f linkage-y.o }
	send_log "cc -c $native_cflags $srcdir/$subdir/linkage-y.c >&/dev/null\n"
	catch { exec cc -c $native_cflags "$srcdir/$subdir/linkage-y.c" >&/dev/null }
	if ![file exists "linkage-y.o"] then {
	    send_log "c89 -c $native_cflags $srcdir/$subdir/linkage-y.c >&/dev/null\n"
	    catch { exec c89 -c $native_cflags "$srcdir/$subdir/linkage-y.c" >&/dev/null }
	}
	if [file exists "linkage-y.o"] then {
	    set lines [gcc_target_compile "linkage-y.o linkage-x.o" "x" executable ""]
	    if [string match "" $lines] then {
		pass "linkage.c"
	    } else {
		fail "linkage.c"
	    }
	}
    }
}