stdlib.cdl

ecos实时嵌入式操作系统

# ====================================================================
#
#      stdlib.cdl
#
#      C library stdlib related 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
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## FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
## for more details.
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## 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.
##
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## Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
## at http://sources.redhat.com/ecos/ecos-license/
## -------------------------------------------
#####ECOSGPLCOPYRIGHTEND####
# ====================================================================
######DESCRIPTIONBEGIN####
#
# Author(s):      jlarmour
# Contributors:
# Date:           2000-04-14
#
#####DESCRIPTIONEND####
#
# ====================================================================

cdl_package CYGPKG_LIBC_STDLIB {
    display       "ISO C library general utility functions"
    description   "
        This package provides general utility functions in <stdlib.h>
        as specified by the ISO C standard - ISO/IEC 9899:1990."
    doc           ref/libc.html
    include_dir   cyg/libc/stdlib
    parent        CYGPKG_LIBC
    requires      CYGPKG_ISOINFRA
    implements    CYGINT_ISO_STDLIB_STRCONV
    implements    CYGINT_ISO_STDLIB_ENVIRON
    implements    CYGINT_ISO_STDLIB_SYSTEM
    implements    CYGINT_ISO_BSEARCH
    implements    CYGINT_ISO_QSORT
    implements    CYGINT_ISO_ABS
    implements    CYGINT_ISO_DIV
    requires      CYGINT_ISO_CTYPE
    requires      CYGINT_ISO_STRING_STRFUNCS

    compile       abs.cxx      atox.cxx     bsearch.cxx  \
                  div.cxx      getenv.cxx   qsort.cxx    \
                  rand.cxx     strtod.cxx   strtol.cxx   \
                  strtoul.cxx  system.cxx

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

    cdl_component CYGIMP_LIBC_STDLIB_INLINES {
        display       "Inline versions of <stdlib.h> functions"
        flavor        none
        no_define
        description   "
            This option chooses whether some of the
            particularly simple standard utility functions
            from <stdlib.h> are available as inline
            functions. This may improve performance, and as
            the functions are small, may even improve code
            size."

        cdl_option CYGIMP_LIBC_STDLIB_INLINE_ABS {
            display       "abs() / labs()"
            default_value 1
            no_define
            requires      { CYGBLD_ISO_STDLIB_ABS_HEADER == \
                            "<cyg/libc/stdlib/abs.inl>" }
        }

        cdl_option CYGIMP_LIBC_STDLIB_INLINE_DIV {
            display       "div() / ldiv()"
            default_value 1
            no_define
            requires      { CYGBLD_ISO_STDLIB_DIV_HEADER == \
                            "<cyg/libc/stdlib/div.inl>" }
        }

        cdl_option CYGIMP_LIBC_STDLIB_INLINE_ATOX {
            display       "atof() / atoi() / atol()"
            default_value 1
            no_define
            requires      { CYGBLD_ISO_STDLIB_STRCONV_HEADER == \
                            "<cyg/libc/stdlib/atox.inl>" }
        }
    }
    
    cdl_component CYGPKG_LIBC_RAND {
        display       "Random number generation"
        flavor        none
        description   "
            These options control the behaviour of the
            functions rand(), srand() and rand_r()"
    
        cdl_option CYGSEM_LIBC_PER_THREAD_RAND {
            display       "Per-thread random seed"
            doc           ref/libc-thread-safety.html
            requires      CYGVAR_KERNEL_THREADS_DATA
            default_value 0
            description   "
                This option controls whether the pseudo-random
                number generation functions rand() and srand()
                have their state recorded on a per-thread
                basis rather than global. If this option is
                disabled, some per-thread space can be saved.
                Note there is also a POSIX-standard rand_r()
                function to achieve a similar effect with user
                support. Enabling this option will use one slot
                of kernel per-thread data. You should ensure you
                have enough slots configured for all your
                per-thread data."
        }
    
        cdl_option CYGNUM_LIBC_RAND_SEED {
            display       "Random number seed"
            flavor        data
            legal_values  0 to 0x7fffffff
            default_value 1
            description   "
                This selects the initial random number seed for
                rand()'s pseudo-random number generator. For
                strict ISO standard compliance, this should be 1,
                as per section 7.10.2.2 of the standard."
        }
    
        cdl_option CYGNUM_LIBC_RAND_TRACE_LEVEL {
            display       "Tracing level"
            flavor        data
            legal_values  0 to 1
            default_value 0
            description   "
                Trace verbosity level for debugging the rand(),
                srand() and rand_r() functions. Increase this
                value to get additional trace output."
        }
    
        cdl_option CYGIMP_LIBC_RAND_SIMPLEST {
            display       "Simplest implementation"
            flavor        bool
            default_value 0
            implements    CYGINT_ISO_RAND
            description   "
                This provides a very simple implementation of rand()
                that does not perform well with randomness in the
                lower significant bits. However it is exceptionally
                fast. It uses the sample algorithm from the ISO C
                standard itself."
        }
    
        cdl_option CYGIMP_LIBC_RAND_SIMPLE1 {
            display       "Simple implementation #1"
            flavor        bool
            default_value 1
            implements    CYGINT_ISO_RAND
            description   "
                This provides a very simple implementation of rand()
                based on the simplest implementation above. However
                it does try to work around the lack of randomness
                in the lower significant bits, at the expense of a
                little speed."
        }
    
        cdl_option CYGIMP_LIBC_RAND_KNUTH1 {
            display       "Knuth implementation #1"
            flavor        bool
            default_value 0
            implements    CYGINT_ISO_RAND
            description   "
                This implements a slightly more complex algorithm
                published in Donald E. Knuth's Art of Computer
                Programming Vol.2 section 3.6 (p.185 in the 3rd ed.).
                This produces better random numbers than the
                simplest approach but is slower."
        }
    }
    
    cdl_option CYGFUN_LIBC_strtod {
        display       "Provides strtod()"
        requires      CYGPKG_LIBM
        default_value { 0 != CYGPKG_LIBM }
        implements    CYGINT_ISO_STDLIB_STRCONV_FLOAT
        description   "
            This option allows use of the utility function
            strtod() (and consequently atof()) to convert
            from string to double precision floating point
            numbers. Disabling this option removes the
            dependency on the math library package."
    }
    
    cdl_option CYGNUM_LIBC_BSEARCH_TRACE_LEVEL {
        display       "bsearch() tracing level"
        flavor        data
        legal_values  0 to 1
        default_value 0
        description   "
            Trace verbosity level for debugging the <stdlib.h>
            binary search function bsearch(). Increase this
            value to get additional trace output."
    }
    
    cdl_option CYGNUM_LIBC_QSORT_TRACE_LEVEL {
        display       "qsort() tracing level"
        flavor        data
        legal_values  0 to 1
        default_value 0
        description   "
            Trace verbosity level for debugging the <stdlib.h>
            quicksort function qsort(). Increase this value
            to get additional trace output."
    }
    

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

    cdl_component CYGPKG_LIBC_STDLIB_OPTIONS {
        display       "C library stdlib build options"
        flavor        none
        no_define
        description   "
	    Package specific build options including control over
	    compiler flags used only in building this package,
	    and details of which tests are built."


        cdl_option CYGPKG_LIBC_STDLIB_CFLAGS_ADD {
            display       "Additional compiler flags"
            flavor        data
            no_define
            default_value { "" }
            description   "
                This option modifies the set of compiler flags for
                building this package. These flags are used in addition
                to the set of global flags."
        }

        cdl_option CYGPKG_LIBC_STDLIB_CFLAGS_REMOVE {
            display       "Suppressed compiler flags"
            flavor        data
            no_define
            default_value { "" }
            description   "
                This option modifies the set of compiler flags for
                building this package. These flags are removed from
                the set of global flags if present."
        }

        cdl_option CYGPKG_LIBC_STDLIB_TESTS {
            display       "C library stdlib tests"
            flavor        data
            no_define
            calculated    { "tests/abs tests/atoi tests/atol tests/bsearch tests/div tests/getenv tests/labs tests/ldiv tests/qsort tests/rand1 tests/rand2 tests/rand3 tests/rand4 tests/srand tests/strtol tests/strtoul" }
            description   "
                This option specifies the set of tests for this package."
        }
    }
}

# ====================================================================
# EOF stdlib.cdl