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#..
# Copyright (c) VIX TECHNOLOGY (AUST) LTD
#
# Module name   : DAFBR
# Module type   : Makefile system
# Compiler(s)   : None
# Environment(s): All
#
# Description:
#       This file provides Toolset initialisation and plugin functions
#       to makelib.pl2
#
# Contents:
#
# Revision History:
#       15-Dec-04   DDP     Created
#............................................................................#

##############################################################################
#   ToolsetInit()
#       Runtime initialisation
#
##############################################################################

my $v2_compiler = '';

ToolsetInit();

sub ToolsetInit
{
    my( @args ) = @ScmToolsetArgs;             # Toolset arguments
    my( $version, $product, $endian );

    $endian = "little";

#.. Parse arguments
#
    Debug( "DAFBR(@args)\n" );

    foreach $_ ( @args ) {
        if ( m/Endian=Big/ ) {
            $endian = "big";

        } elsif ( m/Endian=Little/ ) {
            $endian = "little";

        } else {
            Message( "DAFBR: unknown toolset argument $_ -- ignored\n" );
        }
    }

#.. Parse Platform Arguments
#
    @args = @ScmPlatformArgs;                   # Platform arguments
    foreach $_ ( @args ) {
        if (/^--product=(.*)/) {                # GBE product
            $product = $1;
        } else {
            Message( "DAFBR: unknown platform argument $_ -- ignored\n" );
        }
    }

#.. Standard.rul requirements
#
    $s =   undef;           # Assembler source file - not supported
    $o =   'rul';           # Object files
    $a =   undef;           # Library file          - not supported
    $so =  undef;           # Shared library        - not supported
    $exe = '.bin';          # Linked binary images

#.. Toolset configuration
#
    $ScmToolsetVersion = "1.0.0";               # our version
    $ScmToolsetGenerate = 0;                    # generate optional
    $::ScmToolsetProgDependancies = 0;          # handle Prog dependancies myself

#.. Define the environment
#
    #
    #   Define initialisation targets
    #   These will be used to ensure that correct versions of the toolset are present
    #
    Init( "dafbr" );

    ToolsetDefine ( "#################################################" );
    ToolsetDefine ( "# DAF BR compiler" );
    ToolsetDefine ( "#" );
    ToolsetDefine ( "ENDIAN := $endian" );

    ToolsetDefines( "dafbr.def" );
    ToolsetRules  ( "dafbr.rul" );
    ToolsetRules  ( "standard.rul" );


#.. Locate the compiler
#   The compiler is contained within a package.
#   This will contol the package version
#
#   Ensure that the pakage has been attached to the build
#   Ensure that we can find a suitable binary
#
    my $compiler = ToolExtensionProgram( "compile.exe" );
    my $compiler_path = StripFileExt( $compiler );

    Error ("Cannot locate the BR Compiler", "Check that the daf_br_compiler package is being used" )
        unless ( $compiler_path );
    ToolsetDefine ( "DAFBRCOMPILER := $compiler" );
    ToolsetDefine ( "DAFBRCOMPILER_PATH := $compiler_path" );


#.. Locate the compiler opcode table
#   This SHOULD be in a different package, but a local version is allowed
#   to simplify testing of the compiler.
#
    my $opcode = MakeSrcResolveExtended ( 1, "opcodes.tbl" );
    if ( $opcode eq  "opcodes.tbl")
    {
        $opcode = "$::Cwd/opcodes.tbl";
        if ( -f $opcode )
        {
            #
            #   Local opcode table is only supported to simplify testing
            #   of the compiler suite. Users should not be encouraged
            #   to provide a local table;
            #
            Warning("*** Local opcode table found. ***",
                    "*** Usage not recommended     ***");
        }
        else
        {
            Error ("Cannot locate the BR Compiler opcodes", 
                   "Check that a daf_br_compiler_opcodes package is used" );
        }
    }

    ToolsetDefine ( "DAFBROPCODE := $opcode" );
    my $opcode_path = StripFileExt ( $opcode );
    ToolsetDefine ( "DAFBROPCODE_PATH := $opcode_path" );


#.. Determine the version of the compiler
#   Locate a package with the compiler. Sort of works against the use of
#   ToolExtensionProgram() above. Perhaps we need a call to determine both.
#
    version_scan:
    for my $entry (@{$::ScmBuildPkgRules{$ScmPlatform} })
    {
        for my $td ( @{$entry->{'TOOLDIRS'}} )
        {
            if ( -f "$td/compile.exe" )
            {
                my ($maj,$min,$patch) = split( '\.', $entry->{'DVERSION'} );
                $v2_compiler = 1 if ( $maj > 1 );
Message( "DAFBR: Compiler version: $maj.$min.$patch\n" );
                last version_scan;
            }
        }
    }
    Message( "DAFBR: Using pre-version-2 compiler\n" ) unless $v2_compiler;

#.. Extend the CompilerOption directive
#   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 =
    (
        'usedef='       => { 'BRLD_DEF' , \&locate_PLDEF },

        'addcdheader'   => { 'BRLD_FLAGS' , "" },
        'nocdheader'    => { 'BRLD_FLAGS' , "noheader" },
    );

#
#   Install defaults
#
    $ScmCompilerOpts{'BRLD_FLAGS'} = "noheader";
    $ScmCompilerOpts{'DAFBR_V2'} = 1 if $v2_compiler;
    
}

#-------------------------------------------------------------------------------
# Function        : locate_PLDEF
#
# Description     : Called to validate the "UseDef" option
#                   This function will
#                       1) verify that user has passed in a name
#                       2) Save the name of the file for later use
#                          We cannot source the file at this point
#
# Inputs          : $0  - Key  ( With a "=" appended )
#                   $1  - Value
#
# Returns         : undef : Error detected
#                   Name of the file
#

sub locate_PLDEF
{
    my ($key, $file) = @_;
    return undef unless $file;
    return $file;
}

###############################################################################
#   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 ) = @_;
    foreach $_ ( @$pArgs ) {
        Message( "DAFBR: unknown compiler option $_ -- ignored\n" );
    }

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


    #
    #   Add in the global DEF file if present
    #   This can only be used by Version-2+ of the compiler. Earlier versions
    #   MUST not use it as they will generate a payload in the first phase.
    #
    if ($v2_compiler)
    {
        my $def;
        my $def_name = $ScmCompilerOpts{'BRLD_DEF'};    # Start with global value
        if ( $def_name )
        {
            #
            #   Locate the true path of the provided REL file
            #   If it is a generate file so it will be in the SRCS hash
            #   Other wise the use will have to use Src to locate the file
            #
            $def = MakeSrcResolve ( $def_name );
            MakePadded( 4, "\$(OBJDIR)/$obj.$::o:", "\tBRCC_DEF = $def\n" );
        }
        else
        {
            Error("dafbr: Must have a global .def file, with the V2 compiler");
        }
    }

    #
    #   Cleanup files that may be generated
    #
    ToolsetGenerate( "\$(OBJDIR)/$obj.rul" );
    ToolsetGenerate( "\$(OBJDIR)/$obj.sym" );
    ToolsetGenerate( "\$(OBJDIR)/$obj.asm" );
    ToolsetGenerate( "\$(OBJDIR)/$obj.pre" );
    ToolsetGenerate( "\$(OBJDIR)/$obj.lnk" );
}



###############################################################################
#   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" );
}

###############################################################################
#   ToolsetLD( $name, \@args, \@objs, \@libraries )
#       This subroutine takes the user options and builds the rules
#       required to link the program 'name'.
#
#   Implementation Notes:
#
#   The DAF BR Compiler does not support libraries
#   It can "link" .rul files into a .bin file with the help of a .def file
#
#   Within this paradigm the objects are .RUL files and the .DEF file is passed
#   in directly or it may be globally specified
#
#   The compiler cannot take the names of the .RUL files
#   It can search for them in a specified directory and since they have
#   been created in the OBJDIR directory this directory is used.
#
#   Supported options
#       --Def=name              - Name of the .DEF file
#                                 The global value will be used if none specified
#       --Header                - Add a 32 byte CD file header
#       --NoHeader              - Don't add a CD file header
#                                 Default is to take global value
#
#   Arguments:
#       (none)
#
###############################################################################

sub ToolsetLD
{
    my ( $name, $pArgs, $pObjs, $pLibs ) = @_;
    my ( $full ) = '$(BINDIR)/' . $name . $::exe;
    my ( @slist );
    my $def_name = $ScmCompilerOpts{'BRLD_DEF'};    # Start with global value
    my $opt_header;

#.. Parse arguments
#
    foreach $_ ( @$pArgs ) {
        if (/--Def=(.*)$/) {                        # Definition file
            $def_name = $1;
        } elsif (/--NoHeader/ ) {                   # No CD header
            $opt_header = "noheader";
        } elsif (/--Header/ ) {
            $opt_header = "";                       # Add CD Header
        } else {
            Message( "DAFBR LD: unknown option $_ -- ignored\n" );
        }
    }

    if ( $def_name )
    {
        #
        #   Locate the true path of the provided REL file
        #   If it is a generate file so it will be in the SRCS hash
        #   Other wise the use will have to use Src to locate the file
        #
        $def = MakeSrcResolve ( $def_name );
    }

#.. Sanity Check
#   Need a .def file
#   Need at least one object file
#   No libraries allowed
#
    Error ("dafbr LD: No .def file specified")
        unless ( $def );

    Error ("dafbr LD: No .rul files specified")
        unless ( scalar @$pObjs > 0 );

    Error ("dafbr LD: Libraries not supported")
        if ( scalar @$pLibs > 0 );
        

    #
    #   Rules and Recipes to create the Program
    #
    my $me = MakeEntry::New (*MAKEFILE, $full );
    $me->AddComment ("Build Program: $name" );
    $me->AddDependancy ( map ( "$_.$::o", @$pObjs) );
    $me->AddRecipe ( '$(LD)' );
    $me->AddDefn ( 'BRLD_DEF' => $def  );
    $me->AddDefn ( 'BRLD_FLAGS' => $opt_header  ) if defined($opt_header);
    $me->Print();

    #
    #   Package the file
    #
    PackageProgAddFiles ( $name, $full );
}

1;