# Copyright (C) 1992-2016 Free Software Foundation, Inc.

#

# This file is part of DejaGnu.

#

# DejaGnu 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 3 of the License, or

# (at your option) any later version.

#

# DejaGnu 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 DejaGnu; if not, write to the Free Software Foundation,

# Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.

# This file was written by Rob Savoye <rob@welcomehome.org> and

# extensively modified by Bob Manson <manson@cygnus.com>.

# A hairy pattern to recognize text.

set text "\[- A-Za-z0-9\.\;\"\_\:\'\`\(\)\!\#\=\+\?\&\*]"

# This is a collection of support procs for the target data

# structures. We use a named array, since Tcl has no real data

# structures. Here's the special index words for the array:

#       Required fields are:

#	    name    - the name of the target. (mostly for error messages) This

#		      should also be the string used for this target's array.

#                     It should also be the same as the linker script so we

#		      can find them dynamically.

#       Optional fields are:

#	    ldflags - the flags required to produce a fully linked executable.

#	    config  - the target canonical for this target. This is a regexp

#		      as passed to istarget or isnative.

#	    cflags  - the flags required to produce an object file from a

#		      source file.

#	    connect - the connectmode for this target. This is for both IP and

#		      serial connections.

#	    hostname  - the hostname of the target. This is for TCP/IP based

#		      connections, and is also used for versions of tip that

#		      use /etc/remote.

#	    serial  - the serial port. This is typically /dev/tty? or com?:.

#	    baud    - the baud rate for a serial port connection.

#	    netport - the IP port.

#	    x10     - parameters for the x10 controller (used to reboot)

#	    fileid  - the fileid or spawn id of of the connection.

#	    prompt  - a regexp for matching the prompt.

#	    ioport  - the port for I/O on dual port systems.

#

# there are three main arrays, indexed in with "target", "build", and "host".

# all other targets are indexed with a name usually based on the linker script

# like "idp", or "ex93x.ld".

#

# Set the target connection.

#

proc push_target { name } {

    pop_config target

    push_config target $name

}

# Set the host connection.

#

proc push_host { name } {

    pop_config host

    push_config host $name

}

# Set the build connection.

#

proc push_build { name } {

    pop_config build

    push_config build $name

}

# Set the config for the current host or target connection.

#

proc push_config { type name } {

    global target_info

    verbose "pushing config for $type, name is $name"

    if {[info exists target_info($type,name)]} {

	if { $target_info($type,name) == $name } {

	    error "pushing config for $type, '$name' twice"

	}

    }

    set target_info($type,name) $name

}

# Set the current connection for target or host.

#

proc pop_config { type  } {

    global target_info

    if {[info exists target_info(${type},name)]} {

	unset target_info(${type},name)

    }

}

# Unset the target connection.

#

proc pop_target { } {

    pop_config target

}

# Unset the host connection.

#

proc pop_host { } {

    pop_config host

}

# Remove extraneous warnings from TEXT.

#

# An example is:

# ld.so: warning: /usr/lib/libc.so.1.8.1 has older revision than expected 9

#

proc prune_warnings { text } {

    global host_triplet

    # remove the \r part of "\r\n" so we don't break all the patterns

    # we want to match.

    regsub -all -- "\r" $text "" text

    # This is from sun4's.  Do it for all machines for now.

    # The "\\1" is to try to preserve a "\n" but only if necessary.

    if {[ishost "sparc-*-sunos*"]} {

	regsub -all "(^|\n)(ld.so: warning:\[^\n\]*\n?)+" $text "\\1" text

    }

    # See Brendan for the raison d'etre of this one.

    # http://en.wikipedia.org/wiki/Brendan_Kehoe

    if {[ishost "alpha*-*-*"]} {

	regsub -all "(^|\n)(/usr/(ucb|bin)/ld.*without exceptions was\[^\n\]+\n?)" $text "\\1" text

    }

    if {[ishost "hppa*-*-hpux*"]} {

       # Ignore the compiler's warnings about PA incompatibility.

       regsub -all "(^|\n)\[^\n\]*PA 2.0 object file \[^\n\]* was detected. The linked output may not run on a PA 1.x system." $text "" text

       regsub -all "(^|\n)\[^\n\]*PA 2.0 object file \[^\n\]* was detected. The linked output may not run on a PA 1.x system." $text "" text

       # And the linker's +vcompatwarnings verbage.

       regsub -all "(^|\n)\[^\n\]*Linker features were used that may not be supported\[^\n\]*.\[^\n\]*." $text "" text

       # Ignore these warnings, which the HP aCC compiler seems to

       # generate on HP-UX 10.30 and 11.0.  (Something is probably

       # wrong with some system headers, but still...)

       #

       # This particular warning always is given with a line of warning

       # text, followed by a source line, followed by a line with "^^^"

       # underlining an offending symbol name.  Here we slurp up the

       # warning text and the next two lines, assuming that they are

       # the source line and underline chars.

       #

       regsub -all "Warning .*The linkage directive is ignored for an object or function declared static..\[^\n\]*.\[^\n\]*." $text "" text

       # Ignore these warnings, which I often see from the ANSI C

       # compiler installed on HP-UX 11.0 machines.  (Something is

       # probably wrong with an installation, or perhaps NLS isn't

       # quite healthy yet on 11.0.  In either case, it's easier to

       # "fix" this nit here, than it is to track down & fix the

       # root cause.)

       #

       # This particular warning always is given with a line of warning

       # text, followed by line that says "Using internal messages".

       #

       regsub -all "Warning: Unable to open pxdb message catalog.*" $text "" text

       regsub -all ".* Using internal messages.*" $text "" text

       # Another form of the "unable to find message catalog" warning.

       #

       regsub -all "cpp: warning .*Possibly incorrect message catalog." $text "" text

       # Another odd warning on 11.0.

       #

       regsub -all "aCC .assigner.: Warning .*Could not find library for -l.*" $text "" text

       # Oh heck, just keep adding 'em here...

       #

       regsub -all "aCC .assigner.: Warning .*Could not satisfy instantiation request for \[^\n\]* contained in\[^\n\]*\n\t/lib/pa20_64/lib\[a-zA-Z0-9\]*.sl" $text "" text

      # Remove the lines that are output by the HP F77 compiler to

      # indicate the functions that are being compiled.

      upvar compiler_type compiler_type

      if { [info exists compiler_type] && $compiler_type == "f77" } {

	  regsub -all "\[ \ta-zA-Z_0-9\./\]*:\[\r\n\]+" $text "" text

      }

      # Ignore the warnings about unknown options

      regsub -all ".*warning \[0-9\]+: Unknown option.*ignored.*" $text "" text

      }

    # Ignore these.

    regsub -all "(^|\n)\[^\n\]*linker input file unused since linking not done" $text "" text

    regsub -all "(^|\n)\[^\n\]*file path prefix \[^\n\]* never used" $text "" text

    # This is from sun4's.  Do it for all machines for now.

    # The "\\1" is to try to preserve a "\n" but only if necessary.

    regsub -all "(^|\n)(ld.so: warning:\[^\n\]*\n?)+" $text "\\1" text

    # This happens when compiling on Alpha OSF/1 with cc -g -O.

    regsub -all "(^|\n)(\n*uopt: Warning: file not optimized; use -g3 if both optimization and debug wanted\n?)+" $text "\\1" text

    # This happens when compiling on Alpha OSF using gas.

    regsub -all "(^|\n)(/usr/.*/ld:\nWarning: Linking some objects which contain exception information sections\n\tand some which do not. This may cause fatal runtime exception handling\n\tproblems\[^\n\]*\n?)+" $text "\\1" text

    # This happens on SunOS with cc -g -O.

    regsub -all "(^|\n)(cc: Warning: -O conflicts with -g. -O turned off.\n?)+" $text "\\1" text

    # This happens when assembling code with the native HP assembler

    regsub -all "(^|\n)(as:\[^\n\]*err#13.\n  .warning.\[^\n\]*\n?)+" $text "\\1" text

    # When using the HP assembler, -g isn't supported.

    regsub -all "(^|\n)(cc1: warning: -g is only supported when using GAS on this processor\[^\n\]*\ncc1: warning:\[^\n\]*\n?)+" $text "\\1" text

    regsub -all "(^|\n)(cc1plus: warning: -g is only supported when using GAS on this processor\[^\n\]*\ncc1plus: warning:\[^\n\]*\n?)+" $text "\\1" text

    # This happens when testing across NFS.

    regsub -all "(^|\n)((NFS|nfs) server \[^\n\]* not responding\[^\n\]*\n?)+" $text "\\1" text

    regsub -all "(^|\n)((NFS|nfs) server \[^\n\]* (ok|is alive again)\[^\n\]*\n?)+" $text "\\1" text

    # This happens when testing across NFS on osf4.

    regsub -all "(^|\n)(NFS3 server \[^\n\]* not responding still trying\[^\n\]*\n?)+" $text "\\1" text

    regsub -all "(^|\n)(NFS3 server \[^\n\]* ok\[^\n\]*\n?)+" $text "\\1" text

    # When using the IRIX 6 o32 assembler, -g isn't supported

    regsub -all "(^|\n)(cc1: warning: `-g' not supported by this configuration of GCC\[^\n\]*\n?)+" $text "\\1" text

    regsub -all "(^|\n)(cc1plus: warning: `-g' not supported by this configuration of GCC\[^\n\]*\n?)+" $text "\\1" text

    regsub -all "(^|\n)(cc1: warning: -mabi=32 does not support -g\[^\n\]*\n?)+" $text "\\1" text

    regsub -all "(^|\n)(cc1plus: warning: -mabi=32 does not support -g\[^\n\]*\n?)+" $text "\\1" text

    # This happens with the o32 assembler on IRIX 6.

    regsub -all "(^|\n)(as: Warning: -O3 is not supported for assembly compiles for ucode compilers; changing to -O2.\n?)+" $text "\\1" text

    # This happens when using g++ on a DWARF system.

    regsub -all "(^|\n)(cc1plus: warning: -g option not supported for C\\+\\+ on systems using the DWARF debugging format\n?)+" $text "\\1" text

    # This is from sun4's.  Do it for all machines for now.

    # The "\\1" is to try to preserve a "\n" but only if necessary.

    regsub -all "(^|\n)(ld.so: warning:\[^\n\]*\n?)+" $text "\\1" text

    # See Brendan for the raison d'etre of this one.

    # http://en.wikipedia.org/wiki/Brendan_Kehoe

    if {[string match "alpha*-*-*" $host_triplet]} {

	regsub -all "(^|\n)(/usr/(ucb|bin)/ld.*without exceptions was\[^\n\]+\n?)" $text "\\1" text

    }

    # Don't pay attention to the AIX4 linker warnings.

    regsub -all "(^|\n)(ld:.*WARNING: Duplicate.*ld:.*Use the -bload\[^\n\]*\n?)" $text "\\1" text

    # Or the IRIX 6 ones.

    regsub -all "(^|\n)(ld(|32|64): WARNING \[^\n\]*\n?)+" $text "\\1" text

    regsub -all "(^|\n)(ld(|32|64): Giving up.*Use -wall\[^\n\]*\n?)+" $text "\\1" text

    # Or the NetBSD ones.

     regsub -all "(^|\n)(\[^\n\]*: In function\[^\n\]*\n\[^\n\]\[^\n\]*warning: this program uses \[^\n\]*)" $text "\\1" text

     regsub -all "(^|\n)(\[^\n\]*: In function\[^\n\]*\n\[^\n\]\[^\n\]*warning: reference to compatibility \[^\n\]*)" $text "\\1" text

     regsub -all "(^|\n)(\[^\n\]*:\[0-9\]+: warning: \[^\n\]* possibly used unsafely, use \[^\n\]*\n?)" $text "\\1" text

    regsub -all "(^|\n)(\[^\n\]*: warning: reference to compatibility glob\[^\n\]*\n?)" $text "\\1" text

    # Or the OpenBSD ones.

    regsub -all "(^|\n)(\[^\n\]*: In function\[^\n\]*\n\[^\n\]\[^\n\]*warning: \[^\n\]* is (often|almost always) misused, please use \[^\n\]*\n?)" $text "\\1" text

    regsub -all "(^|\n)(\[^\n\]*: warning: \[^\n\]* is (often|almost always) misused, please use \[^\n\]*\n?)" $text "\\1" text

    # GNU ld warns about functions marked as dangerous in GNU libc.

    regsub -all "(^|\n)\[^\n\]*: In function\[^\n\]*\n\[^\n\]\[^\n\]*is dangerous\[^\n\]*" $text "" text

     regsub -all "(^|\n)\[^\n\]*: In function\[^\n\]*\n\[^\n\]\[^\n\]*the use of \[^\n\]* is dangerous, better use \[^\n\]*" $text "" text

    regsub -all "(^|\n)\[^\n\]*is dangerous\[^\n\]*" $text "" text

     # Libgloss libnosys defines functions that warn when linked in

    regsub -all "(^|\n)\[^\n\]*: In function\[^\n\]*\n\[^\n\]\[^\n\]*is not implemented and will always fail\[^\n\]*" $text "" text

    regsub -all "(^|\n)\[^\n\]*is not implemented and will always fail\[^\n\]*" $text "" text

    # libstdc++-v3 tests can emit cpplib warnings due to duplicate -isystem / -I flags

    regsub -all "(^|\n)\[^\n\]*: warning: changing search order for system directory\[^\n\]*" $text "" text

    regsub -all "(^|\n)\[^\n\]*: warning:   as it has already been specified\[^\n\]*" $text "" text

    # Cygwin cc1 warns about -fpic and -fPIC

    regsub -all "(^|\n)\[^\n\]*: warning: -f(pic|PIC) ignored for target \[^\n\]*" $text "" text

    # Ignore linker warning when searching 64bit libraries in /lib.

    regsub -all "(^|\n)\[^\n\]*: skipping incompatible \[^\n\]* when searching for \[^\n\]*" $text "" text

    # It might be tempting to get carried away and delete blank lines, etc.

    # Just delete *exactly* what we're ask to, and that's it.

    return $text

}

# Invoke the compiler. This gets interesting cause the compiler may

# not be on the same machine we're running DejaGnu on.

#

proc target_compile {source destfile type options} {

    set target [target_info name]

    if { [info procs ${target}_compile] != "" } {

	return [${target}_compile $source $destfile $type $options]

    } else {

	return [default_target_compile $source $destfile $type $options]

    }

}

proc default_target_compile {source destfile type options} {

    global target_triplet

    global tool_root_dir

    global CFLAGS_FOR_TARGET

    global LDFLAGS_FOR_TARGET

    global compiler_flags

    if { $destfile == "" && $type != "preprocess" && $type != "none" } {

	error "Must supply an output filename for the compile to default_target_compile"

    }

    set add_flags ""

    set libs ""

    set compiler_type "c"

    set compiler ""

    set ldflags ""

    set dest [target_info name]

    if {[info exists CFLAGS_FOR_TARGET]} {

	append add_flags " $CFLAGS_FOR_TARGET"

    }

    if {[info exists LDFLAGS_FOR_TARGET]} {

	append ldflags " $LDFLAGS_FOR_TARGET"

    }

    if {[info exists target_info(host,name)]} {

	set host [host_info name]

    } else {

	set host "unix"

    }

    foreach i $options {

	if { $i == "ada" } {

	    set compiler_type "ada"

	    if {[board_info $dest exists adaflags]} {

		append add_flags " [target_info adaflags]"

	    }

	    if {[board_info $dest exists gnatmake]} {

		set compiler [target_info gnatmake]

	    } else {

		set compiler [find_gnatmake]

	    }

	}

	if { $i == "c++" } {

	    set compiler_type "c++"

	    if {[board_info $dest exists cxxflags]} {

		append add_flags " [target_info cxxflags]"

	    }

	    append add_flags " [g++_include_flags]"

	    if {[board_info $dest exists c++compiler]} {

		set compiler [target_info c++compiler]

	    } else {

		set compiler [find_g++]

	    }

	}

	if { $i == "d" } {

	    set compiler_type "d"

	    if {[board_info $dest exists dflags]} {

		append add_flags " [target_info dflags]"

	    }

	    if {[board_info $dest exists dcompiler]} {

		set compiler [target_info dcompiler]

	    } else {

		set compiler [find_gdc]

	    }

	}

	if { $i == "f77" } {

	    set compiler_type "f77"

	    if {[board_info $dest exists f77flags]} {

		append add_flags " [target_info f77flags]"

	    }

	    if {[board_info $dest exists f77compiler]} {

		set compiler [target_info f77compiler]

	    } else {

		set compiler [find_g77]

	    }

	}

	if { $i == "f90" } {

	    set compiler_type "f90"

	    if {[board_info $dest exists f90flags]} {

		append add_flags " [target_info f90flags]"

	    }

	    if {[board_info $dest exists f90compiler]} {

		set compiler [target_info f90compiler]

	    } else {

		set compiler [find_gfortran]

	    }

	}

	if {[regexp "^dest=" $i]} {

	    regsub "^dest=" $i "" tmp

	    if {[board_info $tmp exists name]} {

		set dest [board_info $tmp name]

	    } else {

		set dest $tmp

	    }

	}

	if {[regexp "^compiler=" $i]} {

	    regsub "^compiler=" $i "" tmp

	    set compiler $tmp

	}

	if {[regexp "^additional_flags=" $i]} {

	    regsub "^additional_flags=" $i "" tmp

	    append add_flags " $tmp"

	}

	if {[regexp "^ldflags=" $i]} {

	    regsub "^ldflags=" $i "" tmp

	    append ldflags " $tmp"

	}

	if {[regexp "^libs=" $i]} {

	    regsub "^libs=" $i "" tmp

	    append libs " $tmp"

	}

	if {[regexp "^incdir=" $i]} {

	    regsub "^incdir=" $i "-I" tmp

	    append add_flags " $tmp"

	}

	if {[regexp "^libdir=" $i]} {

	    regsub "^libdir=" $i "-L" tmp

	    append add_flags " $tmp"

	}

	if {[regexp "^ldscript=" $i]} {

	    regsub "^ldscript=" $i "" ldscript

	}

	if {[regexp "^redirect=" $i]} {

	    regsub "^redirect=" $i "" redirect

	}

	if {[regexp "^optimize=" $i]} {

	    regsub "^optimize=" $i "" optimize

	}

	if {[regexp "^timeout=" $i]} {

	    regsub "^timeout=" $i "" timeout

	}

    }

    if {[board_info $host exists cflags_for_target]} {

	append add_flags " [board_info $host cflags_for_target]"

    }

    global CC_FOR_TARGET

    global CXX_FOR_TARGET

    global D_FOR_TARGET

    global F77_FOR_TARGET

    global F90_FOR_TARGET

    global GNATMAKE_FOR_TARGET

    if {[info exists GNATMAKE_FOR_TARGET]} {

	if { $compiler_type == "ada" } {

	    set compiler $GNATMAKE_FOR_TARGET

	}

    }

    if {[info exists CC_FOR_TARGET]} {

	if { $compiler == "" } {

	    set compiler $CC_FOR_TARGET

	}

    }

    if {[info exists CXX_FOR_TARGET]} {

	if { $compiler_type == "c++" } {

	    set compiler $CXX_FOR_TARGET

	}

    }

    if {[info exists D_FOR_TARGET]} {

	if { $compiler_type == "d" } {

	    set compiler $D_FOR_TARGET

	}

    }

    if {[info exists F77_FOR_TARGET]} {

	if { $compiler_type == "f77" } {

	    set compiler $F77_FOR_TARGET

	}

    }

    if {[info exists F90_FOR_TARGET]} {

	if { $compiler_type == "f90" } {

	    set compiler $F90_FOR_TARGET

	}

    }

    if { $compiler == "" } {

	set compiler [board_info $dest compiler]

	if { $compiler == "" } {

	    return "default_target_compile: No compiler to compile with"

	}

    }

    if {![is_remote host]} {

	if { [which $compiler] == 0 } {

	    return "default_target_compile: Can't find $compiler."

	}

    }

    if {$type == "object"} {

	append add_flags " -c"

    }

    if { $type == "preprocess" } {

	append add_flags " -E"

    }

    if { $type == "assembly" } {

	append add_flags " -S"

    }

    if {[board_info $dest exists cflags]} {

	append add_flags " [board_info $dest cflags]"

    }

    if { $type == "executable" } {

	if {[board_info $dest exists ldflags]} {

	    append add_flags " [board_info $dest ldflags]"

	}

	if { $compiler_type == "c++" } {

	    append add_flags " [g++_link_flags]"

	}

	if {[isnative]} {

	    # This is a lose.

	    catch "glob -nocomplain $tool_root_dir/libstdc++/libstdc++.so* $tool_root_dir/libstdc++/libstdc++.sl" tmp

	    if { ${tmp} != "" } {

		if {[regexp ".*solaris2.*" $target_triplet]} {

		    # Solaris 2

		    append add_flags " -R$tool_root_dir/libstdc++"

		} elseif {[regexp ".*(osf|irix5|linux).*" $target_triplet]} {

		    # OSF/1 or IRIX 5

		    append add_flags " -Wl,-rpath,$tool_root_dir/libstdc++"

		} elseif {[regexp ".*hppa.*" $target_triplet]} {

		    # HP-UX

		    append add_flags " -Wl,-a,shared_archive"

		}

	    }

	}

    }

    if {![info exists ldscript]} {

	set ldscript [board_info $dest ldscript]

    }

    foreach i $options {

	if { $i == "debug" } {

	    if {[board_info $dest exists debug_flags]} {

		append add_flags " [board_info $dest debug_flags]"

	    } else {

		append add_flags " -g"

	    }

	}

    }

    if {[info exists optimize]} {

	append add_flags " $optimize"

    }

    if { $type == "executable" } {

	append add_flags " $ldflags"

	foreach x $libs {

	    if {[file exists $x]} {

		append source " $x"

	    } else {

		append add_flags " $x"

	    }

	}

	if {[board_info $dest exists libs]} {

	    append add_flags " [board_info $dest libs]"

	}

	# This probably isn't such a good idea, but it avoids nasty

	# hackiness in the testsuites.

	# The math library must be linked in before the C library.  The C

	# library is linked in by the linker script, so this must be before

	# the linker script.

	if {[board_info $dest exists mathlib]} {

	    append add_flags " [board_info $dest mathlib]"

	} else {

	    append add_flags " -lm"

	}

	# This must be added here.

	append add_flags " $ldscript"

	if {[board_info $dest exists remote_link]} {

	    # Relink option.

	    append add_flags " -Wl,-r"

	}

	if {[board_info $dest exists output_format]} {

	    append add_flags " -Wl,-oformat,[board_info $dest output_format]"

	}

    }

    if {[board_info $dest exists multilib_flags]} {

	set add_flags "[board_info $dest multilib_flags] $add_flags"

    }

    verbose "doing compile"

    set sources ""

    if {[is_remote host]} {

	foreach x $source {

	    set file [remote_download host $x]

	    if { $file == "" } {

		warning "Unable to download $x to host."

		return "Unable to download $x to host."

	    } else {

		append sources " $file"

	    }

	}

    } else {

	set sources $source

    }

    if {[is_remote host]} {

	append add_flags " -o a.out"

	remote_file host delete a.out

    } else {

	if { $destfile != "" } {

	    append add_flags " -o $destfile"

	}

    }

    # This is obscure: we put SOURCES at the end when building an

    # object, because otherwise, in some situations, libtool will

    # become confused about the name of the actual source file.

    if {$type == "object"} {

	set opts "$add_flags $sources"

    } else {

	set opts "$sources $add_flags"

    }

    if {[is_remote host]} {

	if {[host_info exists use_at]} {

	    set fid [open "atfile" "w"]

	    puts $fid "$opts"

	    close $fid

	    set opts "@[remote_download host atfile]"

	    remote_file build delete atfile

	}

    }

    verbose "Invoking the compiler as $compiler $opts" 2

    if {[info exists redirect]} {

	verbose "Redirecting output to $redirect" 2

	set status [remote_exec host "$compiler $opts" "" "" $redirect]

    } else {

	if {[info exists timeout]} {

	    verbose "Setting timeout to $timeout" 2

	    set status [remote_exec host "$compiler $opts" "" "" "" $timeout]

	} else {

	    set status [remote_exec host "$compiler $opts"]

	}

    }

    set compiler_flags $opts

    if {[is_remote host]} {

	remote_upload host a.out $destfile

	remote_file host delete a.out

    }

    set comp_output [prune_warnings [lindex $status 1]]

    regsub "^\[\r\n\]+" $comp_output "" comp_output

    if { [lindex $status 0] != 0 } {

	verbose -log "compiler exited with status [lindex $status 0]"

    }

    if { [lindex $status 1] != "" } {

	verbose "output is:\n[lindex $status 1]" 2

    }

    if { [lindex $status 0] != 0 && "${comp_output}" == "" } {

	set comp_output "exit status is [lindex $status 0]"

    }

    return ${comp_output}

}

proc reboot_target { } {

    set result [remote_reboot target]

    puts "REBOOT_TARGET: \"$result\""

    return ${result}

}

# Invoke this if you really want as to be called directly, rather than

# calling the compiler. FLAGS are any additional flags to pass to the

# assembler.

#

proc target_assemble { source destfile flags } {

    return [default_target_assemble $source $destfile $flags]

}

proc default_target_assemble { source destfile flags } {

    global AS_FOR_TARGET

    global ASFLAGS_FOR_TARGET

    if {[info exists AS_FOR_TARGET]} {

	set AS "$AS_FOR_TARGET"

    } else {

	if {![board_info target exists assembler]} {

	    set AS [find_gas]

	} else {

	    set AS [board_info target assembler]

	}

    }

    if {[info exists ASFLAGS_FOR_TARGET]} {

	append flags " $ASFLAGS_FOR_TARGET"

    }

    if {[is_remote host]} {

	set source [remote_download host $source]

	set dest "a.out"

    } else {

	set dest $destfile

    }

    set status [remote_exec host "$AS $source $flags -o $dest"]

    if {[is_remote host]} {

	remote_upload host $dest $destfile

    }

    set comp_output [prune_warnings [lindex $status 1]]

    if { [lindex $status 0] != 0 } {

	verbose -log "assembler exited with status [lindex $status 0]"

    }

    if { [lindex $status 1] != "" } {

	verbose "assembler output is:\n[lindex $status 1]" 2

    }

    return ${comp_output}

}

# Invoke this if you really want ld to be called directly, rather than

# calling the compiler. FLAGS are any additional flags to pass to the

# linker.

#

proc target_link { objects destfile flags } {

    return [default_link target "$objects" "$destfile" $flags]

}

proc default_link { board objects destfile flags } {

    global LD_FOR_TARGET

    global LDFLAGS_FOR_TARGET

    # return -L's in ldflags

    proc only--Ls { ldflags } {

	set result ""

	set ldflags [split $ldflags]

	set len [llength $ldflags]

	for { set i 0 } { $i < $len } { incr i } {

	    # Note: We ignore the situation where a -L is actually the

	    # argument to an option.

	    set arg [lindex $ldflags $i]

	    regsub "^-Wl," $arg "" arg

	    if {[regexp "^-L" $arg]} {

		# Is the directory in the next arg, or part of this one?

		if { "$arg" == "-L" } {

		    if { $i + 1 < $len } {

			append result " -L [lindex $ldflags $i+1]"

			incr i

		    }

		} else {

		    append result " $arg"

		}

	    }

	}

	return $result

    }

    if {[info exists LD_FOR_TARGET]} {

	set LD "$LD_FOR_TARGET"

    } else {

	if {![board_info target exists linker]} {

	    set LD [find_ld]

	} else {

	    set LD [board_info target linker]

	}

    }

    if {[info exists LDFLAGS_FOR_TARGET]} {

	append flags " $LDFLAGS_FOR_TARGET"

    }

    # `ldflags' consists of arguments to gcc (that are then

    # passed to ld), not arguments to ld directly.

    # We need the -L's.

    if {[board_info $board exists ldflags]} {

	set ldflags [board_info $board ldflags]

	set ldflags [only--Ls $ldflags]

	append flags " $ldflags"

    }

    if {[board_info $board exists ldscript]} {

	# strip leading -Wl, if present

	set ldscript [board_info $board ldscript]

	regsub "^-Wl," $ldscript "" ldscript

	append flags " $ldscript"

    }

    if {[is_remote host]} {

	set nobjects ""

	foreach x $objects {

	    set nobjects "$nobjects [remote_download host $x]"

	}

	set objects "$nobjects"

	set dest "a.out"

    } else {

	set dest $destfile

    }

    set status [remote_exec host "$LD $objects $flags -o $dest"]

    if {[is_remote host]} {

	remote_upload host $dest $destfile

    }

    set comp_output [prune_warnings [lindex $status 1]]

    if { [lindex $status 0] != 0 } {

	verbose -log "linker exited with status [lindex $status 0]"

    }

    if { [lindex $status 1] != "" } {

	verbose "linker output is:\n[lindex $status 1]" 2

    }

    return ${comp_output}

}