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# -*- mode: perl; tabs: 8; indent-width: 4; show-tabs: yes; -*-

#

# Module name   : GCC

# Module type   : Makefile system

# Compiler(s)   : ANSI C

# Environment(s): GCC

#

# Description:

#       GCC C/C++ toolset

#

#............................................................................#

use strict;

use warnings;

# Global variables

our $ScmPlatform;

our $ScmNoToolsTest;

#   Misc variables

my $UseGcov = 0;

my $LcovExplicitBranch = '';

my $UseCppcheck = 0;

##############################################################################

#   Configuration information

#   Cross reference from CrossCompiler Alias to actual paths

#   Structure:

#   Hash reference: Array of toolchain information

#       Mandatory

#          ROOT             => Root of compiler

#          BASE             => Base for binaries

#       Optional

#          CC_OPTS          => Additonal Compiler options

#          CC_OPTSP         => Production Compiler options

#          CC_OPTSD         => Debug Compiler options

#          UNCONTROLLED     => Boolean to create warning

#          PACKAGE_ARCH     => Packageing architecture

#          VERSION          => Version reported by GCC

#          MACHINE          => Machine reported by GCC

#          COMPILER_OPTIONS => Toolset specific compiler initial options

#                              This is a comma seperated list

my %ToolsetConfig = (

    'i386-unknown-linux-gnu'    => {

        ROOT        => '/opt/crosstool/gcc-4.1.1-glibc-2.5/i586-unknown-linux-gnu',

        BASE        => 'bin/i586-unknown-linux-gnu-',

       VERSION      => '4.1.1',

       MACHINE      => 'i586-unknown-linux-gnu'

    },

    'arm-9tdmi-linux-gnu'       => {

        ROOT        => '/opt/crosstool/gcc-4.1.1-glibc-2.5/arm-9tdmi-linux-gnu',

        BASE        => 'bin/arm-9tdmi-linux-gnu-',

        VERSION     => '4.1.1',

        MACHINE     => 'arm-9tdmi-linux-gnu'

        },

    'powerpc-603e-linux-gnu'    => {

       ROOT         => '/opt/crosstool/gcc-4.1.1-glibc-2.5/powerpc-603e-linux-gnu',

       BASE         => 'bin/powerpc-603e-linux-gnu-',

       VERSION      => '4.1.1',

       MACHINE      => 'powerpc-603e-linux-gnu'

    },

    'arm-926ejs-linux-gnueabi'  => {

       ROOT         => '/opt/crosstool/gcc-4.4.3-glibc-2.9/arm-926ejs-linux-gnueabi',

       BASE         => 'bin/arm-926ejs-linux-gnueabi-',

       CC_OPTS      => '-Wno-psabi',

       VERSION      => '4.4.3',

       MACHINE      => 'arm-926ejs-linux-gnueabi'

    },

    'arm-926ejs-linux-gnueabi-v2'  => {

       ROOT         => '/opt/crosstool/gcc-5.2.0-glibc-2.17/arm-926ejs-linux-gnueabi',

       BASE         => 'bin/arm-926ejs-linux-gnueabi-',

       CC_OPTS      => '-Wno-psabi',

       VERSION      => '5.2.0',

       MACHINE      => 'arm-926ejs-linux-gnueabi'

    },

    'powerpc-603e-linux-gnu-v2'  => {

       ROOT         => '/opt/crosstool/gcc-5.2.0-glibc-2.17/powerpc-603e-linux-gnu',

       BASE         => 'bin/powerpc-603e-linux-gnu-',

       VERSION      => '5.2.0',

       MACHINE      => 'powerpc-603e-linux-gnu'

    },

    'i686-linux-gnu'    => {

       ROOT         => '/usr',

       BASE         => 'bin/',

       PACKAGE_ARCH => 'i386',

       VERSION      => '4.6',

       MACHINE      => 'i686-linux-gnu'

    },

    'arm-iwmmxt-linux-gnueabi'  => {

       ROOT         => '/opt/marvel',

       BASE         => 'bin/arm-iwmmxt-linux-gnueabi-',

       VERSION      => '4.2.4',

       MACHINE      => 'arm-iwmmxt-linux-gnueabi'

    },

    'arm-unknown-linux-gnueabi-sk20-4.1.1.0'  => {

       ROOT         => '/opt/arm-unknown-linux-gnueabi-sk20-4.1.1.0',

       BASE         => 'bin/arm-unknown-linux-gnueabi-',

       VERSION      => '4.8.2',

       MACHINE      => 'arm-unknown-linux-gnueabi'

    },

    'x86_64-linux-gnu'    => {

       ROOT         => '/usr',

       BASE         => 'bin/',

       PACKAGE_ARCH => 'amd64',

       VERSION      => '4.8',

       MACHINE      => 'x86_64-linux-gnu',

       COMPILER_OPTIONS =>  'pic'               # Always create PIC

    },

    #

    #   Old (not to be used) version of the embedded toolchain

    #   This was deprecated in favor of gcc-4.1.1-glibc-2.5

    #   It is not possible to reproduce old packages using the old compiler

    #   This is a known issue

    #

    'i386-unknown-linux-gnu.glibc-2.3.2' => {

       ROOT         => '/opt/crosstool/gcc-4.1.0-glibc-2.3.2/i386-unknown-linux-gnu',

       BASE         => 'bin/i386-unknown-linux-gnu-'

    },

    'arm-9tdmi-linux-gnu.glibc-2.3.2' => {

       ROOT         => '/opt/crosstool/gcc-4.1.0-glibc-2.3.2/arm-9tdmi-linux-gnu',

       BASE         => 'bin/arm-9tdmi-linux-gnu-'

    },

    #

    #   Not too sure where this is used

    #

    'armv4l-unknown-linux-gcc' => {

       ROOT         => '/opt/host/armv4l',

       BASE         => 'bin/armv4l-unknown-linux-'

    },

    #

    #   The compiler for the current local machine

    #

    'i386-unknown-linux-gcc' => {

       ROOT         => '/usr',

       BASE         => 'bin/',

       UNCONTROLLED => 1,

       PACKAGE_ARCH => 'i386',

    },

);

#

#   Cross reference from GCCTarget to GBE_MACHTYPE for which it can

#   build using the 'native gcc'. This is NOT the preferred mode of operation

#   as the compiler is not as controlled as the cross compilers.

#

my %NativeCompilers = (

    'Linux i386'       => 'linux_i386',

    );

##############################################################################

#   ToolsetInit()

#       Runtime initialisation

#

##############################################################################

ToolsetInit();

sub ToolsetInit

{

    my( $GCCTarget, $GCCToolchain, $GCCRoot, $GCCBin, $GCCAr, $GCCObjCopy );

    my( $GCCFlags,  $GCCFlagsP, $GCCFlagsD, $LDFlags );

    my( $PkgArch);

    my( $arg_alias, $tools_found, $compiler_tool );

#.. Toolset configuration

#

    $::ScmToolsetVersion = "1.0.0";             # our version

    $::ScmToolsetGenerate = 0;                  # GEN generate optional

    $::ScmToolsetCompilerPath = 1;              # Exports Compiler path to makefile via SCM_COMPILERPATH

    $::ScmToolsetProgDependancies = 0;          # handle Prog dependancies myself

    $::ScmToolsetSoName = 1;                    # Shared library supports SoName

#.. Standard.rul requirements

#

    $::s = "asm";

    $::o = "o";

    $::so = "so";

    $::a = "a";

    $::exe = "";

#.. Parse arguments

#

    foreach $_ ( @::ScmToolsetArgs ) {

        if (/^--Target=(.*)/) {                 # OS Version

            $GCCTarget = "$1";

        } elsif (/^--CrossAlias=(.*)/) {        # CrossCompiler target-alias

            $arg_alias = $1;

        } elsif (/^--UseGcov/) {                # Compile for code coverage

            $UseGcov = 1;

        } elsif (/^--LcovExplicitBranch/) {     # Version of lcov requires explicit branch coverage

            $LcovExplicitBranch = ' --rc lcov_branch_coverage=1';

        } elsif (/^--UseCppcheck/) {            # Use cppcheck as the lint tool

            $UseCppcheck = 1;

        } elsif (/^--CompilerTool=(.*)/) {      # CrossCompiler located in package

            $compiler_tool = $1;

        } else {

            Message( "gcc toolset: unknown option $_ -- ignored\n" );

        }

    }

    foreach $_ ( @::ScmPlatformArgs ) {

        if (/^--product=(.*)/) {                # GBE product

        } else {

            Message( "gcc toolset: unknown platform argument $_ -- ignored\n" );

        }

    }

    Error ("TOOLSET/gcc - Target undefined" )

        unless ($GCCTarget);

    #

    #   If the toolset is not required, then do not process any futher

    #   We may not find the compiler

    #

    return

        if ($ScmNoToolsTest);

#.. Cross compile support

#   Compiler provided in package, rather than install on machine

#

if ( $compiler_tool  )

{

    #

    #   The GCC toolset will handle a compiler provided within a package

    #   Initial requirement was for ANDROID NDKs where the compiler is

    #   a part of the NDK and will change.

    #

    #   Compilers in packages will have a file in gbe/COMPILERS/<compiler_tool>

    #   that contains data specifically designed for this toolset

    #

    Verbose("Locate compiler in package: $compiler_tool");

    my @toolList;

    my $toolPath;

    my $toolPkg;

    for my $entry (@{$::ScmBuildPkgRules{$ScmPlatform} })

    {

        my $tpath = join('/', $entry->{ROOT}, 'gbe', 'COMPILERS' , $compiler_tool);

        if ( -f $tpath  )

        {

            push @toolList, $entry->{NAME};

            $toolPath = $tpath;

            $toolPkg = $entry;

        }

    }

    Error ("Multiple packages provide required compiler:", @toolList)

        if ( scalar(@toolList) > 1 );

    Error ("Required compiler not found in any package", "Compiler: $compiler_tool")

        unless ( scalar(@toolList) == 1 );

    #

    #   Process the compiler info file

    #   Rip out the data and create a hash of item/values

    #   File format:

    #       '#' is a line comment

    #       item=value

    #

    my %data;

    open (my $DATA, '<', $toolPath ) || Error("Cannot open compiler datafile. $!", "File: $toolPath");

    while ( <$DATA> )

    {

        $_ =~ s~\s+$~~;

        next if ( m~^#~ );

        m~(.*?)\s*=\s*(.*)~;

        $data{$1} = $2;

    }

    close $DATA;

    #

    #   Force this compilers data into the ToolsetConfig hash

    #

    $arg_alias = $compiler_tool;

    %ToolsetConfig = ();

    $ToolsetConfig{$arg_alias}{ROOT} = join('/', $toolPkg->{ROOT}, $data{ROOT} );

    $ToolsetConfig{$arg_alias}{BASE} = $data{BASE} . '-';

    $ToolsetConfig{$arg_alias}{CC_OPTS} = $data{CFLAGS};

    $ToolsetConfig{$arg_alias}{CC_OPTSP} = $data{CFLAGSP};

    $ToolsetConfig{$arg_alias}{CC_OPTSD} = $data{CFLAGSD};

    $ToolsetConfig{$arg_alias}{VERSION} = $data{VERSION};

    $ToolsetConfig{$arg_alias}{MACHINE} = $data{MACHINE};

    $ToolsetConfig{$arg_alias}{COMPILER_OPTIONS} = $data{COMPILER_OPTIONS};

}

#.. Cross compile support

#

#   Toolchain=root,[bin]

#

    if ( $arg_alias )

    {

        if ( exists $ToolsetConfig{ $arg_alias } )

        {

            $GCCToolchain = $ToolsetConfig{ $arg_alias };

            my $testCompilerPath = $GCCToolchain->{ROOT} . '/' . $GCCToolchain->{BASE} . 'gcc';

            $tools_found = (-d $GCCToolchain->{ROOT}) && ( -f $testCompilerPath);

            Warning ("gcc toolset: CrossPlatform toolchain not found for: $arg_alias",

                     "Path    : $GCCToolchain->{ROOT}" ,

                     "Compiler: $testCompilerPath " 

                      ) unless $tools_found;

        }

        else

        {

            Error("gcc toolset: CrossPlatform Alias not configured: $arg_alias");

        }

        Warning ("Uncontrolled toolchain used: $arg_alias")

            if ( exists($GCCToolchain->{UNCONTROLLED}) && $GCCToolchain->{UNCONTROLLED} );

    }

    #

    #   If no Cross compiler toolchain is found (preferred method), then attempt

    #   to match a native compiler. Only known targets allow a native build

    #

    unless ( $tools_found )

    {

        if ( exists ( $NativeCompilers{$GCCTarget} ))

        {

            if ( $NativeCompilers{$GCCTarget} eq $::GBE_MACHTYPE )

            {

                $tools_found = 1;

                $GCCToolchain = undef;

            }

        }

    }

    #

    #   Must have a toolset by now, either a cross compiler or Native

    #

    Error ("gcc toolset: Toolchain not found for: $GCCTarget" )

        unless ( $tools_found );

    if ( defined $GCCToolchain )

    {

        #

        #   Parse GCCToolchain. Potential parts to create

        #       GCCRoot     - Location to find the effective /usr/include directory

        #       GCCBin      - Path to the gcc executable

        #       GCCAr       - Path to the ar executable

        #       GCCFlags    - Additional compiler flags. Also Production and Debug

        #

        $GCCRoot = $GCCToolchain->{ROOT};

        $GCCBin = '${GCC_ROOT}/' . $GCCToolchain->{BASE} . 'gcc';

        $GCCAr =  '${GCC_ROOT}/' . $GCCToolchain->{BASE} . 'ar';

        $GCCObjCopy =  '${GCC_ROOT}/' . $GCCToolchain->{BASE} . 'objcopy';

        $GCCFlags = $GCCToolchain->{CC_OPTS};

        $GCCFlagsP = $GCCToolchain->{CC_OPTSP};

        $GCCFlagsD = $GCCToolchain->{CC_OPTSD};

        $PkgArch = $GCCToolchain->{PACKAGE_ARCH};

    }

    else

    {

        $GCCRoot = '/usr';

        $GCCBin = 'gcc';

        $GCCAr = 'ar';

        $GCCObjCopy =  'objcopy';

    }

    #

    #   When running under gcov we need to instruct GCC to perform code coverage

    #   generation in both C flags and LD flags

    #

    if ( $UseGcov )

    {

        $GCCFlags .= ' -coverage';

        $LDFlags  .= ' -coverage';

    }

    #

    #   When running with cppcheck we need to include it in our environment

    #

    if ( $UseCppcheck )

    {

        ToolsetRequire( "cppcheck" );

        PlatformDefine( "CPPCHECK_PLATFORM := unix32" );

    }

#.. Define GCC environment

#

    PlatformDefine( "

#################################################

# GCC toolchain definitions 

#

#..");

    PlatformDefine( "GCC_TARGET         := $GCCTarget" );

    PlatformDefine( "GCC_ROOT           := $GCCRoot" );

    PlatformDefine( "GCC_CC             := $GCCBin" );

    PlatformDefine( "GCC_AR             := $GCCAr" );

    PlatformDefine( "GCC_OBJCOPY        := $GCCObjCopy" );

    PlatformDefine( "GCC_CFLAGS         := $GCCFlags" ) if defined $GCCFlags;

    PlatformDefine( "GCC_CFLAGSP        := $GCCFlagsP" ) if defined $GCCFlagsP;

    PlatformDefine( "GCC_CFLAGSD        := $GCCFlagsD" ) if defined $GCCFlagsD;

    PlatformDefine( "GCC_LDFLAGS        := $LDFlags" ) if defined $LDFlags;

    #

    #   Required since this toolset advertises: ScmToolsetCompilerPath

    #

    PlatformDefine( "SCM_COMPILERPATH   := \$\{GCC_CC\}" );

    #

    #   Sanity checking

    #

    PlatformDefine( "GCC_EVERSION       := " . $GCCToolchain->{VERSION} ) if defined $GCCToolchain->{VERSION};

    PlatformDefine( "GCC_EMACHINE       := " . $GCCToolchain->{MACHINE} ) if defined $GCCToolchain->{MACHINE};

    #

    #   Option indication of packaging architecture

    #   Used by non-embedded systems for packaging. See debian_packager

    #

    PlatformDefine( "PACKAGE_ARCH       := $PkgArch" ) if (defined $PkgArch);

    PlatformDefine( "" );

#.. Piece the world together

#

    Init( 'gcc' );

    ToolsetDefines( "gcc.def" );

    ToolsetRules( "gcc.rul" );

    ToolsetRules( "standard.rul" );

    PlatformDefine( "CTAGS_EXE:= ctags" );

    ToolsetRequire( "exctags" );                # and Exuberant Ctags

#   Create a standard data structure

#   This is a hash of hashes

#       The first hash is keyed by CompileOption keyword

#       The second hash contains pairs of values to set or remove

#

    %::ScmToolsetCompilerOptions =

    (

        #

        #   Control the thread model to use

        #   This will affect the compiler options and the linker options

        #

        'staticprogs'        => { 'STATIC_PROGS' , '1' },      # Progams link staticlly

        'no_staticprogs'     => { 'STATIC_PROGS' , undef },    # Default

        'noversiondll'       => { 'NO_VERSIONED_DLLS', 1 },    # Matches usage elsewhere

        'pic'                => { 'GEN_PIC' , '1' },           # Force PIC for static libs

        'nopic'              => { 'GEN_PIC' , undef },         # No Pic on Static libs

    );

    #

    #   Set default options

    #

    $::ScmCompilerOpts{'STATIC_PROGS'} = undef;

    $::ScmCompilerOpts{'NO_VERSIONED_DLLS'} = undef;

    #

    #   Process toolset-specfic compiler options

    #

    if ( exists $GCCToolchain->{COMPILER_OPTIONS} )

    {

        CompileOptions('*', split(',',$GCCToolchain->{COMPILER_OPTIONS}) );

    }

}

###############################################################################

#   ToolsetCTAGS()

#       This subroutine takes the user options and builds the rules

#       required to build the CTAGS database.

#

#   Arguments:

#       --xxx                   No arguments currently defined

#

#   Output:

#       [ctags:]

#           $(EXCTAGS)

#

###############################################################################

sub ToolsetCTAGS

{

    EXCTAGS( @_ );

}

###############################################################################

#   ToolsetCC( $source, $obj, \@args )

#       This subroutine takes the user options and builds the rule(s)

#       required to compile the source file 'source' to 'obj'

#

###############################################################################

sub ToolsetCC

{

    my( $source, $obj, $pArgs ) = @_;

    my( $cflags, $file ) = "";

    foreach $_ ( @$pArgs ) {

        if (/--Shared$/) {                      # Building a 'shared' object

            $cflags  = "$cflags \$(SHCFLAGS)";

        } else {

            Message( "CC: unknown option $_ -- ignored\n" );

        }

    }

    MakePrint( "\n\t\$(CC)\n" );

    if ( $cflags )

    {                                           # object specific CFLAGS

        MakePadded( 4, "\$(OBJDIR)/$obj.$::o:" );

        MakePrint( "\tCFLAGS +=$cflags\n" );

    }

    $file = StripExt( $obj );                   # Metric working file

    ToolsetGenerate( "\$(OBJDIR)/$file.met" );

    if ( $UseGcov )

    {

        ToolsetGenerate( '$(OBJDIR)/' . $file . '.gcno' );

        ToolsetGenerate( '$(OBJDIR)/' . $file . '.gcda' );

    }

}

###############################################################################

#   ToolsetCCDepend( $depend, \@sources )

#       This subroutine takes the user options and builds the

#       rule(s) required to build the dependencies for the source

#       files 'sources' to 'depend'.

#

###############################################################################

sub ToolsetCCDepend

{

    MakePrint( "\t\$(CCDEPEND)\n" );

}

###############################################################################

#   ToolsetCXX( $source, $obj, \@args )

#       This subroutine takes the user options and builds the rule(s)

#       required to compile the source file 'source' to 'obj'

#

###############################################################################

sub ToolsetCXX

{

    my( $source, $obj, $pArgs ) = @_;

    my( $cflags, $file ) = "";

    foreach $_ ( @$pArgs ) {

        if (/--Shared$/) {                      # Building a 'shared' object

            $cflags  = "$cflags \$(SHCXXFLAGS)";

        } else {

            Message( "CXX: unknown option $_ -- ignored\n" );

        }

    }

    MakePrint( "\n\t\$(CXX)\n" );

    if ( $cflags )

    {                                           # object specific CFLAGS

        MakePadded( 4, "\$(OBJDIR)/$obj.$::o:" );

        MakePrint( "\tCXXFLAGS +=$cflags\n" );

    }

    $file = StripExt( $obj );                   # Metric working file

    ToolsetGenerate( "\$(OBJDIR)/$file.met" );

    if ( $UseGcov )

    {

        ToolsetGenerate( '$(OBJDIR)/' . $file . '.gcno' );

        ToolsetGenerate( '$(OBJDIR)/' . $file . '.gcda' );

    }

}

###############################################################################

#   ToolsetCXXDepend( $depend, \@sources )

#       This subroutine takes the user options and builds the

#       rule(s) required to build the dependencies for the source

#       files 'sources' to 'depend'.

#

###############################################################################

sub ToolsetCXXDepend

{

    ToolsetCCDepend();

}

###############################################################################

#   ToolsetAS( $source, $obj, \@args )

#       This subroutine takes the user options and builds the rule(s)

#       required to compile the source file 'source' to 'obj'

#

###############################################################################

sub ToolsetAS

{

    MakePrint( "\n\t\$(AS)\n" );

}

sub ToolsetASDepend

{

}

###############################################################################

#   ToolsetAR( $name, \@args, \@objs )

#       This subroutine takes the user options and builds the rules

#       required to build the library 'name'.

#

#   Arguments:

#       n/a

#

#   Output:

#       $(BINDIR)/name$.${a}:   .... ]

#           $(AR)

#

#       name_ld += ...  Linker command file

#           :

#

#       name_dp += ...  Dependency list

#           :

#

###############################################################################

sub ToolsetAR

{

    my( $name, $pArgs, $pObjs ) = @_;

#.. Parse arguments

#

    foreach $_ ( @$pArgs )

    {

        Message( "AR: unknown option $_ -- ignored\n" );

    }

#.. Target

#

    MakePrint( "#.. Library ($name)\n\n" );     # label

    MakeEntry( "\$(LIBDIR)/$name\$(GBE_TYPE).$::a:\t",

        "", "\\\n\t\t", ".$::o", @$pObjs );

#.. Build library rule (just append to standard rule)

#

    MakePrint( "\n\t\$(AR)\n\n" );

}

###############################################################################

#   ToolsetARMerge( $name, \@args, \@libs )

#       This subroutine takes the user options and builds the rules

#       required to build the library 'name' by merging the specified

#       libaries

#

#   Arguments:

#       --xxx                   No arguments currently defined

#

#   Output:

#       [ $(LIBDIR)/name$.${a}:   .... ]

#           ...

#

###############################################################################

sub ToolsetARMerge

{

    MakePrint( "\n\t\$(ARMERGE)\n\n" );

}

###############################################################################

#   ToolsetSHLD( $name, \@args, \@objs, \@libraries, $ver )

#       This subroutine takes the user options and builds the rules

#       required to link the Shared Library 'name'.

#

#   Arguments:

#   n/a

#

#   Output:

#       $(LIBDIR)/name:     $(LIBDIR)/shared

#           ln -s $shared $name

#

#       $(LIBDIR)/name.dep: $(GBE_OBJDIR)

#       $(LIBDIR)/name.dep: $(GBE_LIBDIR)

#       $(LIBDIR)/name.dep: $(GBE_PLATFORM).mk

#           $(SHLDDEPEND)

#

#       $(LIBDIR)/shared:   SHNAME=name

#       $(LIBDIR)/shared:   SHBASE=base

#       $(LIBDIR)/shared:   $(LIBDIR)/name.dep  \

#           $(OBJECTS)

#                           

#       ifneq "$(findstring $(IFLAG),23)" ""

#       -include            "$(LIBDIR)/name.dep"

#       endif

#

#       name_ld += ...

#           :

#

###############################################################################

sub ToolsetSHLD

{

    my( $name, $pArgs, $pObjs, $pLibs, $ver ) = @_;

    my( $linkname, $soname, $shared, $dbgname, $def, $def_pref, $multi_scan );

    my $sosuffix;

    my $noVersionedLib = $::ScmCompilerOpts{'NO_VERSIONED_DLLS'};

#.. Parse arguments

#

    foreach $_ ( @$pArgs )

    {

        if (/^--Def=(.*?)(\,(.*))?$/) {         # Library definition

            #

            #   Locate the Def file.

            #   If it is a generate file so it will be in the SRCS hash

            #   Otherwise the user will have to use Src to locate the file

            #

            $def = MakeSrcResolve($1);

            $def_pref = '';

            if ( $1 =~ m~\.def$~ ) {

                $def_pref = '--version-script='; # Old def file

            }

        } elsif ( /^--MultiScan/i ) {

            $multi_scan = 1;

        } elsif ( /^--NoMultiScan/i ) {

            $multi_scan = 0;

        } elsif ( /^--SoNameSuffix=(.*)/i ) {

            $sosuffix = $1;

        } elsif (/^--NoVersionDll/i) {

            $noVersionedLib = 1;

        } else {

            Message( "SHLD: unknown option $_ -- ignored\n" );

        }

    }

    #

    # Determine the 'soname' in none has been provided

    #

    $sosuffix = '.' . $ver

        unless ( defined $sosuffix );

    $sosuffix = ''

        if ( $noVersionedLib );

#.. Various library names

#

    $linkname = "$name\$(GBE_TYPE).$::so";

    $shared = $noVersionedLib ? $linkname : "$linkname.$ver";

    $soname = "$linkname$sosuffix";

    my $shared_path = "\$(LIBDIR)/${shared}";

    my $dbg_path =  $shared_path . '.dbg';

#.. Cleanup rules

#

#   map     Map file

#   ln      Link from LIBDIR to BINDIR

#

    ToolsetGenerate( "\$(LIBDIR)/${name}.map" );

    ToolsetGenerate( "\$(LIBDIR)/${shared}" );

    ToolsetGenerate( "\$(BINDIR)/${soname}" );

    ToolsetGenerate( $dbg_path );

#.. Build rules

#

#   name        Base name

#   shared      Library name, includes GBE_TYPE specification

#

    my ($io) = ToolsetPrinter::New();

    my $dep = $io->SetShldTarget($shared);

    $io->Label( "Shared library", $name );

    PackageShlibAddFiles( $name, "\$(LIBDIR)/$shared" );

    PackageShlibAddFiles( $name, $dbg_path );

    $io->Prt( "\$(LIBDIR)/${shared}:\tSHBASE=${name}\n" );

    $io->Prt( "\$(LIBDIR)/${shared}:\tSHNAME=${soname}\n" );

    $io->Prt( "\$(LIBDIR)/${shared}: \\\n\t\t${dep}" );

    $io->Entry( "", "", " \\\n\t\t", ".$::o", @$pObjs );

    $io->Prt( "\\\n\t\t$def" ) if($def);

    $io->Prt( "\n\t\$(SHLD)" );

    $io->Prt( "\n\t\$(call LDSTRIP,$shared_path,$dbg_path)\n\n" );

#

#   Create soft links

#       'Real Name' to its 'Link Name'

#       'Real Name' to 'SoName' in the BINDIR (for testing I think)

#       'Real Name' to 'SoName' in the LIBDIR (if different)

#

    if ( $shared ne $linkname)

    {

        $io->Label( "Shared library Symbolic Links", $name );

        PackageShlibAddFiles( $name, "\$(LIBDIR)/$linkname" );

        $io->Prt( "\$(LIBDIR)/$linkname:\t\\\n" .

                  "\t\t\$(GBE_BINDIR)\\\n" .

                  "\t\t\$(LIBDIR)/${shared}\n" .

                  "\t\$(AA_PRE)(rm -f \$@; ln -s ./$shared \$@)\n\n" );

    }

    $io->Label( "Shared library BINDIR Symbolic Links", $name );

    PackageShlibAddFiles( $name, "\$(BINDIR)/$soname" );

    $io->Prt( "\$(BINDIR)/$soname:\t\\\n" .

              "\t\t\$(GBE_BINDIR)\\\n" .

              "\t\t\$(LIBDIR)/${shared}\n" .

              "\t\$(AA_PRE)(rm -f \$@; ln -s ../\$(LIBDIR)/$shared \$@)\n\n" );

    if ( $soname ne $shared )

    {

        $io->Label( "Shared library SoName Symbolic Links", $name );

        PackageShlibAddFiles( $name, "\$(LIBDIR)/$soname" );

        $io->Prt( "\$(LIBDIR)/$soname:\t\\\n" .

                  "\t\t\$(GBE_LIBDIR)\\\n" .

                  "\t\t\$(LIBDIR)/${shared}\n" .

                  "\t\$(AA_PRE)(rm -f \$@; ln -s ./$shared \$@)\n" );

    }

#.. Linker command file

#

#       Now the fun part... piecing together a variable $(name_shld)

#       which ends up in the command file.

#

    $io->Newline();

    $io->SetTag( "${name}_shld" );              # command tag

    $io->SetTerm( "\n" );

    $io->Label( "Linker commands", $name );     # label

                                                # object list

    $io->ObjList( $name, $pObjs, \&ToolsetObjRecipe );

    ToolsetLibStd( $pLibs );                    # push standard libraries

    $io->Cmd( "-Wl,$def_pref$def" ) if ($def);

    $io->Cmd( "-Wl,--start-group" ) if ($multi_scan);

    $io->LibList( $name, $pLibs, \&ToolsetLibRecipe );

    $io->Cmd( "-Wl,--end-group" ) if ($multi_scan);

    $io->Newline();

    #.. Dependency link,

    #   Create a library dependency file

    #       Create command file to build applicaton dependency list

    #       from the list of dependent libraries

    #

    #       Create makefile directives to include the dependency

    #       list into the makefile.

    #

    $io->DepRules( $pLibs, \&ToolsetLibRecipe, "\$(LIBDIR)/${shared}" );

    $io->SHLDDEPEND($name, $soname);

}

###############################################################################

# Function        : ToolsetLD

#

# Description     : Takes the user options and builds the rules required to

#                   link the program 'name'.

#

# Inputs          : $name           - base name of the program

#                   $pArgs          - Ref to program arguments

#                   $pObjs          - Ref to program objects

#                   $pLibs          - Ref to program library list

#

# Returns         : Nothing

#

# Output:         : Rules and recipes to create a program

#                       Create program rules and recipes

#                       Create linker input script

#                       Create library dependency list

#                       Include library dependency information

#

sub ToolsetLD

{

    my( $name, $pArgs, $pObjs, $pLibs ) = @_;

    my $static = $::ScmCompilerOpts{'STATIC_PROGS'};

    my $multi_scan;

#.. Parse arguments

#

    foreach $_ ( @$pArgs )

    {

        if ( m/^--Static$/ ) {

            $static = 1;

        } elsif ( m/^--Shared/ ) {

            $static = 0;

        } elsif ( /^--MultiScan/i ) {

            $multi_scan = 1;

        } elsif ( /^--NoMultiScan/i ) {

            $multi_scan = 0;

        } else {

            Message( "LD: unknown option $_ -- ignored\n" );

        }

    }

#.. Names of programs and components

#

    my $base = "\$(BINDIR)/${name}";

    my $full = $base . $::exe;

    my $map  = $base . '.map';

    my $ld  =  $base . '.ld';

    my $dbg =  $base . '.dbg';

#.. Cleanup rules

#

    ToolsetGenerate( $ld );

    ToolsetGenerate( $map );

    ToolsetGenerate( $dbg );

#.. Build rules

#

    my ($io) = ToolsetPrinter::New();

    my $dep = $io->SetLdTarget( $name );

    $io->Prt( "$full : $dep " );

    $io->Entry( "", "", "\\\n\t", ".$::o ", @$pObjs );

    $io->Prt( "\n\t\$(LD)" );

    $io->Prt( "\n\t\$(call LDSTRIP,$full,$dbg)\n\n" );

#.. Linker command file

#

#       Now the fun part... piecing together a variable $(name_ld)

#       which ends up in the command file.

#

    $io->SetTag( "${name}_ld" );                # macro tag

    $io->SetTerm( "\n" );

    $io->Label( "Linker commands", $name );     # label

    $io->Cmd( "-static" ) if ($static);         # Link as a static program

                                                # object list

    $io->ObjList( $name, $pObjs, \&ToolsetObjRecipe );

    ToolsetLibStd( $pLibs );                    # push standard libraries

                                                # library list

    $io->Cmd( "-Wl,--start-group" ) if ($multi_scan);

    $io->LibList( $name, $pLibs, \&ToolsetLibRecipe );

    $io->Cmd( "-Wl,--end-group" ) if ($multi_scan);

    $io->Newline();

    #.. Dependency link,

    #   Create a library dependency file

    #       Create command file to build applicaton dependency list

    #       from the list of dependent libraries

    #

    #       Create makefile directives to include the dependency

    #       list into the makefile.

    #

    $io->DepRules( $pLibs, \&ToolsetLibRecipe, $base );

    $io->LDDEPEND();

#.. Package up the program and other artifacts