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# libstdc++ "tool init file" for DejaGNU

# Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010

# 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 3 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; see the file COPYING3.  If not see

# .

# Define callbacks and load other libraries.  This file is loaded relatively

# early, and before any other file we write ourselves.  "load_lib" will

# find anything in the DejaGNU installation tree, or in our lib directory.

# "load_gcc_lib" will search the core compiler's .exp collection instead.

#

# The naming rule is that dg.exp looks for "tool-" and runtest.exp looks

# for "tool_" when finding callbacks.  Utility routines we define for

# our callbacks begin with "v3-".

#

# libstdc++_* callbacks we don't define, but could:

# ..._option_help           prints additional --help output

# ..._option_proc (--foo)   process our own options

# ..._init (normal.exp)     called once per test file

# ..._finish                bracketing function for libstdc++_init

# ...-dg-prune              removing output text, see top of system dg.exp

#

# Useful hook:  if ${hostname}_init exists, it will be called, almost

# the last thing before testing begins.  This can be defined in, e.g.,

# ~/.dejagnurc or $DEJAGNU.

proc load_gcc_lib { filename } {

    global srcdir

    load_file $srcdir/../../gcc/testsuite/lib/$filename

}

# system routines

load_lib dg.exp

load_lib libgloss.exp

# compiler routines, then ours

load_gcc_lib target-supports.exp

load_gcc_lib target-supports-dg.exp

load_lib prune.exp

load_lib dg-options.exp

load_gcc_lib target-libpath.exp

load_gcc_lib timeout.exp

load_gcc_lib timeout-dg.exp

load_gcc_lib wrapper.exp

# Useful for debugging.  Pass the name of a variable and the verbosity

# threshold (number of -v's on the command line).

proc v3track { var n } {

    upvar $var val

    verbose "++ $var is $val" $n

}

# Called by v3-init below.  "Static" to this file.

proc v3-copy-files {srcfiles} {

    foreach f $srcfiles {

        if { [catch { set symlink [file readlink $f] } x] } then {

            remote_download target $f

        } else {

            if { [regexp "^/" "$symlink"] } then {

                remote_download target $symlink

            } else {

                set dirname [file dirname $f]

                remote_download target $dirname/$symlink

            }

        }

    }

}

# Called once, during runtest.exp setup.

proc libstdc++_init { testfile } {

    global env

    global v3-sharedlib v3-libgomp

    global srcdir blddir objdir tool_root_dir

    global cc cxx cxxflags cxxpchflags cxxldflags

    global includes

    global gluefile wrap_flags

    global ld_library_path

    global target_triplet

    global flags_file

    global tool_timeout

    global DEFAULT_CXXFLAGS

    global STATIC_LIBCXXFLAGS

    # We set LC_ALL and LANG to C so that we get the same error

    # messages as expected.

    setenv LC_ALL C

    setenv LANG C

    # Many hosts now default to a non-ASCII C locale, however, so

    # they can set a charset encoding here if they need.

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

      setenv LC_ALL C.ASCII

      setenv LANG C.ASCII

    }

    set blddir [lookfor_file [get_multilibs] libstdc++-v3]

    set flags_file "${blddir}/scripts/testsuite_flags"

    set shlib_ext [get_shlib_extension]

    v3track flags_file 2

    # If a test doesn't have special options, use DEFAULT_CXXFLAGS.

    # Use this variable if the behavior

    #   1) only applies to libstdc++ testing

    #   2) might need to be negated

    # In particular, some tests have to be run without precompiled

    # headers, or without assertions.

    if ![info exists DEFAULT_CXXFLAGS] then {

        set DEFAULT_CXXFLAGS ""

        # Host specific goo here.

        if { [string match "powerpc-*-darwin*" $target_triplet] } {

            append DEFAULT_CXXFLAGS " -multiply_defined suppress"

        }

    }

    v3track DEFAULT_CXXFLAGS 2

    # By default, we assume we want to run program images.

    global dg-do-what-default

    set dg-do-what-default run

    # Copy any required data files.

    v3-copy-files [glob -nocomplain "$srcdir/data/*.tst"]

    v3-copy-files [glob -nocomplain "$srcdir/data/*.txt"]

    set ld_library_path_tmp ""

    # Locate libgcc.a so we don't need to account for different values of

    # SHLIB_EXT on different platforms

    set gccdir [lookfor_file $tool_root_dir gcc/libgcc.a]

    if {$gccdir != ""} {

        set gccdir [file dirname $gccdir]

        append ld_library_path_tmp ":${gccdir}"

    }

    v3track gccdir 3

    # Locate libgomp. This is only required for parallel mode.

    set v3-libgomp 0

    set libgompdir [lookfor_file $blddir/../libgomp .libs/libgomp.$shlib_ext]

    if {$libgompdir != ""} {

        set v3-libgomp 1

        set libgompdir [file dirname $libgompdir]

        append ld_library_path_tmp ":${libgompdir}"

        verbose -log "libgomp support detected"

    }

    v3track libgompdir 3

    # Locate libstdc++ shared library. (ie libstdc++.so.)

    set v3-sharedlib 0

    set sharedlibdir [lookfor_file $blddir src/.libs/libstdc++.$shlib_ext]

    if {$sharedlibdir != ""} {

        if { [string match "*-*-linux*" $target_triplet] && [isnative] } {

            set v3-sharedlib 1

            verbose -log "shared library support detected"

        }

    }

    v3track v3-sharedlib 3

    set STATIC_LIBCXXFLAGS ""

    set staticlibdir [lookfor_file $blddir src/.libs/libstdc++.a]

    if {$staticlibdir != ""} {

        set staticlibdir [file dirname $staticlibdir]

        # Some targets use libstdc++.a%s in their specs, so they need a

        # -B option for uninstalled testing.

        set STATIC_LIBCXXFLAGS " -B${staticlibdir} "

    }

    # Compute what needs to be added to the existing LD_LIBRARY_PATH.

    if {$gccdir != ""} {

        set compiler ${gccdir}/g++

        set ld_library_path ${ld_library_path_tmp}

        append ld_library_path ":${blddir}/src/.libs"

        if { [is_remote host] == 0 && [which $compiler] != 0 } {

          foreach i "[exec $compiler --print-multi-lib]" {

            set mldir ""

            regexp -- "\[a-z0-9=_/\.-\]*;" $i mldir

            set mldir [string trimright $mldir "\;@"]

            if { "$mldir" == "." } {

              continue

            }

            if { [llength [glob -nocomplain ${gccdir}/${mldir}/libgcc_s*.so.*]] >= 1 } {

              append ld_library_path ":${gccdir}/${mldir}"

            }

          }

        }

        set_ld_library_path_env_vars

        if [info exists env(LD_LIBRARY_PATH)] {

          verbose -log "LD_LIBRARY_PATH = $env(LD_LIBRARY_PATH)"

        }

    } else {

        set compiler [transform "g++"]

    }

    # Set the default timeout for v3 tests.

    set tool_timeout 600

    # Default settings.

    set cxx [transform "g++"]

    set cxxflags "-g -O2 -D_GLIBCXX_ASSERT -fmessage-length=0"

    set cxxpchflags ""

    set cxxldflags ""

    set cc [transform "gcc"]

    # Locate testsuite_hooks.h and other testsuite headers.

    set includes "-I${srcdir}/util"

    # Adapt the defaults for special circumstances.

    if [is_remote host] {

        # A remote host does not, in general, have access to the

        # $srcdir so we copy the testsuite headers into the current

        # directory, and then add that to the search path.

        foreach src [glob "${srcdir}/util/*.h" \

                          "${srcdir}/util/*.cc" \

                          "${srcdir}/util/*.tcc" \

                          "${srcdir}/util/*.hpp" \

                          "${srcdir}/util/*/*.h" \

                          "${srcdir}/util/*/*.cc" \

                          "${srcdir}/util/*/*.tcc" \

                          "${srcdir}/util/*/*.hpp" \

                          "${srcdir}/util/*/*/*.h" \

                          "${srcdir}/util/*/*/*.cc" \

                          "${srcdir}/util/*/*/*.tcc" \

                          "${srcdir}/util/*/*/*.hpp" \

                          "${srcdir}/util/*/*/*/*.h" \

                          "${srcdir}/util/*/*/*/*.cc" \

                          "${srcdir}/util/*/*/*/*.tcc" \

                          "${srcdir}/util/*/*/*/*.hpp" \

                          "${srcdir}/util/*/*/*/*/*.h" \

                          "${srcdir}/util/*/*/*/*/*.cc" \

                          "${srcdir}/util/*/*/*/*/*.tcc" \

                          "${srcdir}/util/*/*/*/*/*.hpp" ] {

            # Remove everything up to "util/..."

            set dst [string range $src [string length "${srcdir}/"] end]

            # Create the directory containing the file.

            set dir [file dirname $dst]

            remote_exec host "mkdir" [list "-p" "$dir"]

            # Download the file.

            set result [remote_download host $src $dst]

            if { $result == "" } {

                verbose -log "Unable to download ${srcdir}/${src} to host."

                return "untested"

            }

        }

        set includes "-Iutil"

    } elseif { [file exists $flags_file] } {

        # If we find a testsuite_flags file, we're testing in the build dir.

        set cxx [exec sh $flags_file --build-cxx]

        set cxxflags [exec sh $flags_file --cxxflags]

        set cxxpchflags [exec sh $flags_file --cxxpchflags]

        set cxxldflags [exec sh $flags_file --cxxldflags]

        set cc [exec sh $flags_file --build-cc]

        set includes [exec sh $flags_file --build-includes]

    }

    append cxxflags " "

    append cxxflags [getenv CXXFLAGS]

    v3track cxxflags 2

    # Always use MO files built by this test harness.

    set cxxflags "$cxxflags -DLOCALEDIR=\".\""

    set ccflags "$cxxflags -DLOCALEDIR=\".\""

    # If a PCH file is available, use it.  We must delay performing

    # this check until $cxx and such have been initialized because we

    # perform a test compilation.  (Ideally, gcc --print-file-name would

    # list PCH files, but it does not.)

    if { $cxxpchflags != "" } {

        set src "config[pid].cc"

        set f [open $src "w"]

        puts $f "int main () {}"

        close $f

        # Fixme: "additional_flags=$cxxpchflags" fails, but would be

        # useful as then the requested variant of the pre-build PCH

        # files could be tested to see if it works.

        set lines [v3_target_compile $src "config[pid].o" object \

                   "additional_flags=-include additional_flags=bits/stdc++.h"]

        if { $lines != "" } {

            verbose -log "Requested PCH file: $cxxpchflags"

            verbose -log "is not working, and will not be used."

            set cxxpchflags ""

        }

        file delete $src

     }

    v3track cxxpchflags 2

    global PCH_CXXFLAGS

    if ![info exists PCH_CXXFLAGS] then {

        set PCH_CXXFLAGS $cxxpchflags

        v3track PCH_CXXFLAGS 2

    }

    libstdc++_maybe_build_wrapper "${objdir}/testglue.o" "-fexceptions"

}

# Callback for cleanup routines.

proc libstdc++_exit { } {

    global gluefile;

    if [info exists gluefile] {

        file_on_build delete $gluefile;

        unset gluefile;

    }

}

# Callback from system dg-test.

proc libstdc++-dg-test { prog do_what extra_tool_flags } {

    # Set up the compiler flags, based on what we're going to do.

    switch $do_what {

        "preprocess" {

            set compile_type "preprocess"

            set output_file "[file rootname [file tail $prog]].i"

        }

        "compile" {

            set compile_type "assembly"

            set output_file "[file rootname [file tail $prog]].s"

        }

        "assemble" {

            set compile_type "object"

            set output_file "[file rootname [file tail $prog]].o"

        }

        "link" {

            set compile_type "executable"

            set output_file "./[file rootname [file tail $prog]].exe"

        }

        "run" {

            set compile_type "executable"

            # FIXME: "./" is to cope with "." not being in $PATH.

            # Should this be handled elsewhere?

            # YES.

            set output_file "./[file rootname [file tail $prog]].exe"

            # This is the only place where we care if an executable was

            # created or not.  If it was, dg.exp will try to run it.

            catch { remote_file build delete $output_file }

        }

        default {

            perror "$do_what: not a valid dg-do keyword"

            return ""

        }

    }

    # Short-circut a bunch of complicated goo here for the special

    # case of compiling a test file as a "C" file, not as C++. Why? So

    # -nostdc++ doesn't trip us up. So all the extra object files

    # don't trip us up. So automatically linking in libstdc++ doesn't

    # happen. So CXXFLAGS don't error.

    set select_compile "v3_target_compile"

    set options ""

    if { $extra_tool_flags != "" } {

        verbose -log "extra_tool_flags are:"

        verbose -log $extra_tool_flags

        if { [string first "-x c" $extra_tool_flags ] != -1 } {

            verbose -log "compiling and executing as C, not C++"

            set edit_tool_flags $extra_tool_flags

            regsub -all ".x c" $edit_tool_flags "" edit_tool_flags

            lappend options "additional_flags=$edit_tool_flags"

            set select_compile "v3_target_compile_as_c"

        } else {

            lappend options "additional_flags=$extra_tool_flags"

        }

    }

    # There is a libstdc++_compile made for us by default (via the tool-

    # and-target file), but the defaults are lacking in goodness.

    set comp_output [$select_compile "$prog" "$output_file" "$compile_type" $options];

    set comp_output [ prune_g++_output $comp_output ];

    return [list $comp_output $output_file]

}

# Override the DejaGnu dg-test in order to clear flags after a test, as

# is done for compiler tests in gcc-dg.exp.

if { [info procs saved-dg-test] == [list] } {

    rename dg-test saved-dg-test

    proc dg-test { args } {

        global errorInfo

        if { [ catch { eval saved-dg-test $args } errmsg ] } {

            set saved_info $errorInfo

            unset_timeout_vars

            error $errmsg $saved_info

        }

        unset_timeout_vars

    }

}

# True if the library supports wchar_t.

set v3-wchar_t 0

# True if the library supports threads.

set v3-threads 0

# True if the library supports symbol versioning.

set v3-symver 0

# Called from libstdc++-dg-test above.  Calls back into system's

# target_compile to actually do the work.

proc v3_target_compile { source dest type options } {

    global gluefile

    global wrap_flags

    global cxx

    global cxxflags

    global cxxldflags

    global includes

    global STATIC_LIBCXXFLAGS

    if { [target_info needs_status_wrapper] != "" && [info exists gluefile] } {

        lappend options "libs=${gluefile}"

        lappend options "ldflags=${wrap_flags}"

    }

    set cxx_final $cxx

    set cxxlibglossflags  [libgloss_link_flags]

    set cxx_final [concat $cxx_final $cxxlibglossflags]

    set cxx_final [concat $cxx_final $STATIC_LIBCXXFLAGS]

    set cxx_final [concat $cxx_final $cxxflags]

    set cxx_final [concat $cxx_final $includes]

    # Flag setting based on type argument.

    if { $type == "executable" } {

        # Link the support objects into executables.

        lappend options "additional_flags=./libtestc++.a $cxxldflags"

    } else {

        if { $type == "sharedlib" } {

            # Don't link in anything.

            set type "executable"

        }

    }

    lappend options "compiler=$cxx_final"

    lappend options "timeout=[timeout_value]"

    return [target_compile $source $dest $type $options]

}

# Called from libstdc++-dg-test above, but only for "C" compilation.

# Calls back into system's target_compile to actually do the work.

proc v3_target_compile_as_c { source dest type options } {

    global gluefile

    global wrap_flags

    global includes

    global flags_file

    global blddir

    global cc

    global cxxflags

    global STATIC_LIBCXXFLAGS

    if { [target_info needs_status_wrapper] != "" && [info exists gluefile] } {

        lappend options "libs=${gluefile}"

        lappend options "ldflags=${wrap_flags}"

    }

    set tname [target_info name]

    set cc_final $cc

    set cxxlibglossflags [libgloss_link_flags]

    set cc_final [concat $cc_final $cxxlibglossflags]

    set cc_final [concat $cc_final $STATIC_LIBCXXFLAGS]

    set cc_final [concat $cc_final $cxxflags]

    set cc_final [concat $cc_final $includes]

    regsub -all {\s[-]nostdinc[+][+]} $cc_final "" cc_final

    # This is needed for "C" tests, as this type of test may need the

    # C++ includes. And if we're not testing in the build directory,

    # the includes variable is not likely to include the necessary

    # info.

    if { ![file exists $flags_file] } {

        # ??? We need a --print-include-dirs option to GCC, so that

        # we can avoid these hacks.  The heuristics here will not

        # work with non-standard --with-includedir= options.

        set version [remote_exec host ${cc} -dumpversion]

        # Remove the trailing newline from the output.

        set version [string trimright [lindex $version 1]]

        set machine [remote_exec host ${cc} -dumpmachine]

        set machine [string trimright [lindex $machine 1]]

        set comp_base_dir [remote_exec host ${cc} --print-prog-name=cc1]

        set comp_base_dir [lindex $comp_base_dir 1]

        set comp_base_dir [file dirname [file dirname [file dirname [file dirname [file dirname $comp_base_dir]]]]]

        # For a cross compiler, the header files will be located in a

        # machine-specific subdirectory.

        set crossbase "${comp_base_dir}/${machine}/include/c++/${version}"

        set crosstarget "${crossbase}/${machine}"

        set cc_final [concat $cc_final "-I$crossbase -I$crosstarget"]

        # For a native compiler, the header files will be located at

        # the top level.

        set includesbase "${comp_base_dir}/include/c++/${version}"

        set includestarget "${includesbase}/${machine}"

        set cc_final [concat $cc_final "-I$includesbase -I$includestarget"]

        set libdir "-L${comp_base_dir}/lib"

    } else {

        set libdir "-L${blddir}/libsupc++/.libs"

        set libdir [concat $libdir "-L${blddir}/src/.libs"]

    }

    set cc_final [concat $cc_final "$libdir"]

    lappend options "compiler=$cc_final"

    lappend options "timeout=[timeout_value]"

    return [target_compile $source $dest $type $options]

}

# Build the support objects linked in with the libstdc++ tests.  In

# addition, set v3-wchar_t, v3-threads, and v3-symver appropriately.

proc v3-build_support { } {

    global env

    global srcdir

    global v3-wchar_t

    global v3-threads

    global v3-symver

    global v3-sharedlib

    # Figure out whether or not the library supports certain features.

    set v3-wchar_t 0

    set v3-threads 0

    set v3-symver 0

    set libtest_objs ""

    set config_src "config.cc"

    set config_out "config.ii"

    set f [open $config_src "w"]

    puts $f "#include "

    puts $f "#include "

    close $f

    v3_target_compile $config_src $config_out preprocess "additional_flags=-dN"

    set file [open $config_out r]

    set preprocessed [read $file]

    close $file

    if { [string first "_GLIBCXX_USE_WCHAR_T" $preprocessed] != -1 } {

        verbose -log "wchar_t support detected"

        set v3-wchar_t 1

    }

    if { [string first "_GLIBCXX_SYMVER" $preprocessed] != -1 } {

        verbose -log "symbol versioning support detected"

        set v3-symver 1

    }

    if { [string first "__GTHREADS" $preprocessed] != -1 } {

        verbose -log "thread support detected"

        set v3-threads 1

    }

    # Try to build the MO files that are used by some of the locale

    # tests.  If we can't build them, that's OK; it just means that

    # those tests will fail.

    foreach lang [list "fr" "de"] {

        catch {

            file mkdir "$lang/LC_MESSAGES"

            remote_exec "build" "msgfmt" "-o $lang/LC_MESSAGES/libstdc++.mo $srcdir/../po/$lang.po"

            if [is_remote host] {

                remote_exec "host" "mkdir" "-p $lang/LC_MESSAGES"

                remote_download "host" "$lang/LC_MESSAGES/libstdc++.mo" "$lang/LC_MESSAGES/libstdc++.mo"

            }

        }

    }

    # Build the support objects.

    set source_files [list testsuite_abi.cc testsuite_allocator.cc \

                          testsuite_character.cc testsuite_hooks.cc \

                          io/verified_cmd_line_input.cc \

                          io/prog_bar.cc performance/time/elapsed_timer.cc ]

    foreach f $source_files {

        set obj [file rootname $f].o

        set object_file [file tail $obj]

        # Compile with "-w" so that warnings issued by the compiler

        # do not prevent compilation.

        if { [v3_target_compile $srcdir/util/$f $object_file "object" \

                  [list "incdir=$srcdir" "additional_flags=-w"]]

             != "" } {

            error "could not compile $f"

        }

        append libtest_objs "$object_file "

    }

    # Collect into libtestc++.a

    if  [info exists env(AR)] {

        set ar $env(AR)

    } else {

        set ar [transform "ar"]

    }

    set arargs "-rc ./libtestc++.a ${libtest_objs}"

    verbose -log "$ar $arargs"

    set result [lindex [remote_exec host "$ar" "$arargs"] 0]

    verbose "link result is $result"

    if { $result == 0 } {

        if  [info exists env(RANLIB)] {

            set ranlib $env(RANLIB)

        } else {

            set ranlib [transform "ranlib"]

        }

        set ranlibargs "./libtestc++.a"

        verbose -log "$ranlib $ranlibargs"

        set result [lindex [remote_exec host "$ranlib" "$ranlibargs"] 0]

        if { $result != 0 } {

            error "could not link libtestc++.a"

        }

    }

    # Build any shared objects needed for regression testing.

    if { ${v3-sharedlib} == 1 } {

        set source_files [list testsuite_shared.cc]

        foreach f $source_files {

            set object_file [file rootname $f].so

            # Compile with "-w" so that warnings issued by the compiler

            # do not prevent compilation.

            if { [v3_target_compile $srcdir/util/$f $object_file "sharedlib" \

             [list "incdir=$srcdir" "additional_flags=-w -shared -fPIC -DPIC"]]

                 != "" } {

                error "could not compile $f"

            }

        }

    }

}

proc check_v3_target_fileio { } {

    global et_fileio_saved

    global et_fileio_target_name

    global tool

    if { ![info exists et_fileio_target_name] } {

        set et_fileio_target_name ""

    }

    # If the target has changed since we set the cached value, clear it.

    set current_target [current_target_name]

    if { $current_target != $et_fileio_target_name } {

        verbose "check_v3_target_fileio: `$et_fileio_target_name'" 2

        set et_fileio_target_name $current_target

        if [info exists et_fileio_saved] {

            verbose "check_v3_target_fileio: removing cached result" 2

            unset et_fileio_saved

        }

    }

    if [info exists et_fileio_saved] {

        verbose "check_v3_target_fileio: using cached result" 2

    } else {

        set et_fileio_saved 0

        # Set up, compile, and execute a C++ test program that tries to use

        # the file functions

        set src fileio[pid].cc

        set exe fileio[pid].x

        set f [open $src "w"]

        puts $f "#include "

        puts $f "#include "

        puts $f "#include "

        puts $f "#include "

        puts $f "#include "

        puts $f "using namespace std;"

        puts $f "int main ()"

        puts $f "{"

        puts $f "  int fd  = open (\".\", O_RDONLY);"

        puts $f "  int ret = 0;"

        puts $f "  if (fd == -1)"

        puts $f "  {"

        puts $f "    int err = errno;"

        puts $f "    if (err == EIO || err == ENOSYS)"

        puts $f "      ret = 1;"

        puts $f "  }"

        puts $f "  else"

        puts $f "  {"

        puts $f "    if (lseek (fd, 0, SEEK_CUR) == -1)"

        puts $f "      ret = 1;"

        puts $f "    close (fd);"

        puts $f "  }"

        puts $f "  return ret;"

        puts $f "}"

        close $f

        set lines [v3_target_compile $src $exe executable ""]

        file delete $src

        if [string match "" $lines] {

            # No error message, compilation succeeded.

            set result [${tool}_load "./$exe" "" ""]

            set status [lindex $result 0]

            remote_file build delete $exe

            verbose "check_v3_target_fileio: status is <$status>" 2

            if { $status == "pass" } {

                set et_fileio_saved 1

            }

        } else {

            verbose "check_v3_target_fileio: compilation failed" 2

        }

    }

    return $et_fileio_saved

}

# Eventually we want C90/C99 determining and switching from this.

proc check_v3_target_c_std { } {

    global et_c_std_saved

    global et_c_std_target_name

    global tool

    if { ![info exists et_c_std_target_name] } {

        set et_c_std_target_name ""

    }

    # If the target has changed since we set the cached value, clear it.

    set current_target [current_target_name]

    if { $current_target != $et_c_std_target_name } {

        verbose "check_v3_target_c_std: `$et_c_std_target_name'" 2

        set et_c_std_target_name $current_target

        if [info exists et_c_std_saved] {

            verbose "check_v3_target_c_std: removing cached result" 2

            unset et_c_std_saved

        }

    }

    if [info exists et_c_std_saved] {

        verbose "check_v3_target_c_std: using cached result" 2

    } else {

        set et_c_std_saved 0

        # Set up, compile, and execute a C++ test program that tries to use

        # C99 functionality.

        # For math bits, could use check_effective_target_c99_math.

        set src fileio[pid].cc

        set exe fileio[pid].x

        set f [open $src "w"]

        puts $f "#include "

        puts $f "#include "

        puts $f "int main ()"

        puts $f "{"

        puts $f "  float f = 45.55;"

        puts $f "  int i = std::tr1::isnan(f);"

        puts $f "  "

        puts $f "  using std::wctomb;"

        puts $f "  return i;"

        puts $f "}"

        close $f

        set lines [v3_target_compile $src $exe executable ""]

        file delete $src

        if [string match "" $lines] {

            # No error message, compilation succeeded.

            set result [${tool}_load "./$exe" "" ""]

            set status [lindex $result 0]

            remote_file build delete $exe

            verbose "check_v3_target_c_std: status is <$status>" 2

            if { $status == "pass" } {

                set et_c_std_saved 1

            }

        } else {

            verbose "check_v3_target_c_std: compilation failed" 2

        }

    }

    return $et_c_std_saved

}

proc check_v3_target_sharedlib { } {

    global v3-sharedlib

    return ${v3-sharedlib}

}

proc check_v3_target_time { } {

    global et_time_saved

    global et_time_target_name

    global tool

    if { ![info exists et_time_target_name] } {

        set et_time_target_name ""

    }

    # If the target has changed since we set the cached value, clear it.

    set current_target [current_target_name]

    if { $current_target != $et_time_target_name } {

        verbose "check_v3_target_time: `$et_time_target_name'" 2

        set et_time_target_name $current_target

        if [info exists et_time_saved] {

            verbose "check_v3_target_time: removing cached result" 2

            unset et_time_saved

        }

    }

    if [info exists et_time_saved] {

        verbose "check_v3_target_time: using cached result" 2

    } else {

        set et_time_saved 0

        # Set up and compile a C++ test program that tries to use

        # the time function

        set src time[pid].cc

        set exe time[pid].x

        set f [open $src "w"]

        puts $f "#include "

        puts $f "using namespace std;"

        puts $f "int main ()"

        puts $f "{"

        puts $f "  time (0);"

        puts $f "}"

        close $f

        set lines [v3_target_compile $src $exe executable ""]

        file delete $src

        if [string match "" $lines] {

            # No error message, compilation succeeded.

            verbose "check_v3_target_time: compilation succeeded" 2

            remote_file build delete $exe

            set et_time_saved 1

        } else {

            verbose "check_v3_target_time: compilation failed" 2

        }

    }

    return $et_time_saved

}

proc check_v3_target_namedlocale { } {

    global et_namedlocale_saved

    global et_namedlocale_target_name

    global tool

    if { ![info exists et_namedlocale_target_name] } {

        set et_namedlocale_target_name ""

    }

    # If the target has changed since we set the cached value, clear it.

    set current_target [current_target_name]

    if { $current_target != $et_namedlocale_target_name } {

        verbose "check_v3_target_namedlocale: `$et_namedlocale_target_name'" 2

        set et_namedlocale_target_name $current_target

        if [info exists et_namedlocale_saved] {

            verbose "check_v3_target_namedlocale: removing cached result" 2

            unset et_namedlocale_saved

        }

    }

    if [info exists et_namedlocale_saved] {

        verbose "check_v3_target_namedlocale: using cached result" 2

    } else {

        set et_namedlocale_saved 0

        # Set up, compile, and execute a C++ test program that tries to use

        # all the required named locales.

        set src nlocale[pid].cc

        set exe nlocale[pid].x

        set f [open $src "w"]

        puts $f "#include "

        puts $f "using namespace std;"

        puts $f "int main ()"

        puts $f "{"

        puts $f "  try"

        puts $f "  {"

        puts $f "     locale(\"\");"

        puts $f "     locale(\"de_DE\");"

        puts $f "     locale(\"de_DE.ISO-8859-15@euro\");"

        puts $f "     locale(\"de_DE@euro\");"

        puts $f "     locale(\"en_GB\");"

        puts $f "     locale(\"en_HK\");"

        puts $f "     locale(\"en_PH\");"

        puts $f "     locale(\"en_US\");"

        puts $f "     locale(\"en_US.ISO-8859-1\");"

        puts $f "     locale(\"en_US.ISO-8859-15\");"

        puts $f "     locale(\"en_US.UTF-8\");"

        puts $f "     locale(\"es_ES\");"

        puts $f "     locale(\"es_MX\");"

        puts $f "     locale(\"fr_FR\");"

        puts $f "     locale(\"fr_FR@euro\");"

        puts $f "     locale(\"is_IS\");"

        puts $f "     locale(\"is_IS.UTF-8\");"

        puts $f "     locale(\"it_IT\");"

        puts $f "     locale(\"ja_JP.eucjp\");"

        puts $f "     locale(\"ru_RU.ISO-8859-5\");"

        puts $f "     locale(\"ru_RU.UTF-8\");"

        puts $f "     locale(\"se_NO.UTF-8\");"

        puts $f "     locale(\"ta_IN\");"

        puts $f "     locale(\"zh_TW\");"

        puts $f "     return 0;"

        puts $f "  }"

        puts $f "  catch(...)"

        puts $f "  {"

        puts $f "     return 1;"

        puts $f "  }"

        puts $f "}"

        close $f

        set lines [v3_target_compile $src $exe executable ""]

        file delete $src

        if [string match "" $lines] {

            # No error message, compilation succeeded.

            set result [${tool}_load "./$exe" "" ""]

            set status [lindex $result 0]

            remote_file build delete $exe

            verbose "check_v3_target_namedlocale: status is <$status>" 2

            if { $status == "pass" } {

                set et_namedlocale_saved 1

            }

        } else {

            verbose "check_v3_target_namedlocale: compilation failed" 2

        }

    }

    return $et_namedlocale_saved

}

proc check_v3_target_debug_mode { } {

    global cxxflags

    global et_debug_mode

    global tool

    if { ![info exists et_debug_mode_target_name] } {

        set et_debug_mode_target_name ""

    }

    # If the target has changed since we set the cached value, clear it.

    set current_target [current_target_name]

    if { $current_target != $et_debug_mode_target_name } {

        verbose "check_v3_target_debug_mode: `$et_debug_mode_target_name'" 2

        set et_debug_mode_target_name $current_target

        if [info exists et_debug_mode] {

            verbose "check_v3_target_debug_mode: removing cached result" 2

            unset et_debug_mode