Subversion Repositories openrisc

# ====================================================================

#

#      infra.cdl

#

#      Infrastructure configuration data

#

# ====================================================================

#####ECOSGPLCOPYRIGHTBEGIN####

## -------------------------------------------

## This file is part of eCos, the Embedded Configurable Operating System.

## Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.

##

## eCos is free software; you can redistribute it and/or modify it under

## the terms of the GNU General Public License as published by the Free

## Software Foundation; either version 2 or (at your option) any later version.

##

## eCos 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 eCos; if not, write to the Free Software Foundation, Inc.,

## 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.

##

## As a special exception, if other files instantiate templates or use macros

## or inline functions from this file, or you compile this file and link it

## with other works to produce a work based on this file, this file does not

## by itself cause the resulting work to be covered by the GNU General Public

## License. However the source code for this file must still be made available

## in accordance with section (3) of the GNU General Public License.

##

## This exception does not invalidate any other reasons why a work based on

## this file might be covered by the GNU General Public License.

##

## Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.

## at http://sources.redhat.com/ecos/ecos-license/

## -------------------------------------------

#####ECOSGPLCOPYRIGHTEND####

# ====================================================================

######DESCRIPTIONBEGIN####

#

# Author(s):      bartv

# Original data:  bartv,hmt

# Contributors:

# Date:           1999-06-13

#

#####DESCRIPTIONEND####

#

# ====================================================================

cdl_package CYGPKG_INFRA {

    display       "Infrastructure"

    include_dir   cyg/infra

    description   "

        Common types and useful macros.

        Tracing and assertion facilities.

        Package startup options."

    compile startup.cxx prestart.cxx pkgstart.cxx userstart.cxx      \

            dummyxxmain.cxx null.cxx simple.cxx fancy.cxx buffer.cxx \

            diag.cxx tcdiag.cxx memcpy.c memset.c delete.cxx eprintf.c \

            pure.cxx

    # ====================================================================

#    cdl_component CYGPKG_INFRA_TYPES {

#        display       "Common Types"

#        flavor        none

#        active_if     0               ;# Not yet configurable.

#        description   "

#            These types are used throughout the eCos source code.

#            Currently there are no configuration options associated

#            with the Common Types component; they are automatically

#            set up according to the selected HAL."

#    }

    # ====================================================================

    cdl_component CYGPKG_INFRA_DEBUG {

        display       "Asserts & Tracing"

        default_value 0

        description   "

            The eCos source code contains a significant amount of

            internal debugging support, in the form of assertions and

            tracing.

            Assertions check at runtime that various conditions are as

            expected; if not, execution is halted.

            Tracing takes the form of text messages that are output

            whenever certain events occur, or whenever functions are

            called or return.

            The most important property of these checks and messages is

            that they are not required for the program to run.

            It is prudent to develop software with assertions enabled,

            but disable them when making a product release, thus

            removing the overhead of that checking.

            It is possible to enable assertions and tracing

            independently.

            There are also options controlling the exact behaviour of

            the assertion and tracing facilities, thus giving users

            finer control over the code and data size requirements."

        script        debug.cdl

    }

    # ====================================================================

    cdl_component CYGPKG_INFRA_STARTUP {

        display       "Startup options"

        flavor        none

        description   "

            Some packages require a startup routine to be called.

            This can be carried out by application code, by supplying

            a routine called cyg_package_start() which calls the

            appropriate package startup routine(s).

            Alternatively, this routine can be constructed automatically

            and configured to call the startup routines of your choice."

        script        startup.cdl

    }

    # ========================================================================

    # memcpy()/memset() configuration

    cdl_option CYGIMP_INFRA_PREFER_SMALL_TO_FAST_MEMCPY {

        display       "Smaller slower memcpy()"

        default_value 0

        description   "

            Enabling this option causes the implementation of

            the standard memcpy() routine to reduce code

            size at the expense of execution speed. This

            option is automatically enabled with the use of

            the -Os option to the compiler. Also note that

            the compiler will try to use its own builtin

            version of memcpy() if possible, ignoring the

            implementation in this package, unless given

            the -fno-builtin compiler option."

    }

    cdl_option CYGIMP_INFRA_PREFER_SMALL_TO_FAST_MEMSET {

        display       "Smaller slower memset()"

        default_value 0

        description   "

            Enabling this option causes the implementation of

            the standard memset() routine to reduce code

            size at the expense of execution speed. This

            option is automatically enabled with the use of

            the -Os option to the compiler. Also note that

            the compiler will try to use its own builtin

            version of memset() if possible, ignoring the

            implementation in this package, unless given

            the -fno-builtin compiler option."

    }

    # ========================================================================

    cdl_option CYGFUN_INFRA_EMPTY_DELETE_FUNCTIONS {

        display       "Provide empty C++ delete functions"

        default_value 1

        description   "

            To deal with virtual destructors, where the correct delete()

            function must be called for the derived class in question, the

            underlying delete is called when needed, from destructors.  This

            is regardless of whether the destructor is called by delete itself.

            So there is a reference to delete() from all destructors.  The

            default builtin delete() attempts to call free() if there is

            one defined.  So, if you have destructors, and you have free(),

            as in malloc() and free(), any destructor counts as a reference

            to free().  So the dynamic memory allocation code is linked

            in regardless of whether it gets explicitly called. This

            increases code and data size needlessly.

            To defeat this undesirable behaviour, we define empty versions

            of delete and delete[].  But doing this prevents proper use

            of dynamic memory in C++ programs via C++'s new and delete

            operators.

            Therefore, this option is provided

            for explicitly disabling the provision of these empty functions,

            so that new and delete can be used, if that is what is required."

    }

    # ========================================================================

    cdl_option CYGFUN_INFRA_DUMMY_ABORT {

        display       "Provide dummy abort() function"

        requires      !CYGINT_ISO_EXIT

        default_value { CYGINT_ISO_EXIT == 0 }

        compile       abort.cxx

        description   "

            This option controls the inclusion of a dummy abort() function.

            Parts of the C and C++ compiler runtime systems contain references

            to abort(), particulary in the C++ exception handling code. It is

            not possible to eliminate these references, so this dummy function

            in included to satisfy them. It is not expected that this function

            will ever be called, so its current behaviour is to simply loop."

    }

    # ========================================================================

    cdl_option CYGFUN_INFRA_DUMMY_STRLEN {

        display       "Provide dummy strlen() function"

        requires      !CYGINT_ISO_STRING_STRFUNCS

        default_value { CYGINT_ISO_STRING_STRFUNCS == 0 }

        compile       strlen.cxx

        description   "

            This option controls the inclusion of a dummy strlen() function.

            Parts of the C and C++ compiler runtime systems contain references

            to strlen(), particulary in the C++ exception handling code. It is

            not possible to eliminate these references, so this dummy function

            in included to satisfy them. While it is not expected that this function

            will ever be called, it is functional but uses the simplest, smallest

            algorithm. There is a faster version of strlen() in the C library."

    }

    # ========================================================================

    # Debugging-related miscellania.

    define_proc {

        puts $::cdl_header "/***** proc output start *****/"

        puts $::cdl_header "#include "

        puts $::cdl_header "/*****  proc output end  *****/"

    }

    # ========================================================================

    # Global compiler option controls

    cdl_option CYGBLD_INFRA_CFLAGS_WARNINGS_AS_ERRORS {

        display       "Make all compiler warnings show as errors"

        requires      { is_substr(CYGBLD_GLOBAL_CFLAGS, " -Werror") }

        default_value 0

        description   "

            Enabling this option will cause all compiler warnings to show

            as errors and bring the library build to a halt. This is used

            to ensure that the code base is warning free, and thus ensure

            that newly introduced warnings stand out and get fixed before

            they show up as weird run-time behavior."

    }

    cdl_option CYGBLD_INFRA_CFLAGS_PIPE {

        display       "Make compiler and assembler communicate by pipe"

        requires      { is_substr(CYGBLD_GLOBAL_CFLAGS, " -pipe") }

        default_value 0

        description   "

            Enabling this option will cause the compiler to feed the

            assembly output the the assembler via a pipe instead of

            via a temporary file. This normally reduces the build

            time."

    }

    # ========================================================================

    # Package compiler options

    cdl_component CYGPKG_INFRA_OPTIONS {

        display "Infra build options"

        flavor  none

        description   "

            Package specific build options including control over

            compiler flags used only in building this package."

        cdl_option CYGPKG_INFRA_CFLAGS_ADD {

            display "Additional compiler flags"

            flavor  data

            no_define

            default_value { "" }

            description   "

                This option modifies the set of compiler flags for

                building the eCos infra package. These flags are used

                in addition to the set of global flags."

        }

        cdl_option CYGPKG_INFRA_CFLAGS_REMOVE {

            display "Suppressed compiler flags"

            flavor  data

            no_define

            default_value { "" }

            description   "

                This option modifies the set of compiler flags for

                building the eCos infra package. These flags are removed from

                the set of global flags if present."

        }

        cdl_option CYGPKG_INFRA_LDFLAGS_REMOVE {

            display "Suppressed linker flags"

            flavor  data

            no_define

            default_value { "-Wl,--gc-sections" }

            description   "

                This option modifies the set of linker flags for

                building the eCos infra package tests. These flags are removed from

                the set of global flags if present."

        }

        cdl_option CYGPKG_INFRA_LDFLAGS_ADD {

            display "Additional linker flags"

            flavor  data

            no_define

            default_value { "-Wl,--fatal-warnings" }

            description   "

                This option modifies the set of linker flags for

                building the eCos infra package tests. These flags are added to

                the set of global flags if present."

        }

        cdl_option CYGPKG_INFRA_TESTS {

            display "Infra package tests"

            flavor  data

            no_define

            calculated { "" }

        }

    }

}