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

#

#      stdlib.cdl

#

#      C library stdlib related configuration data

#

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

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

######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 

        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  functions"

        flavor        none

        no_define

        description   "

            This option chooses whether some of the

            particularly simple standard utility functions

            from  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 == \

                            "" }

        }

        cdl_option CYGIMP_LIBC_STDLIB_INLINE_DIV {

            display       "div() / ldiv()"

            default_value 1

            no_define

            requires      { CYGBLD_ISO_STDLIB_DIV_HEADER == \

                            "" }

        }

        cdl_option CYGIMP_LIBC_STDLIB_INLINE_ATOX {

            display       "atof() / atoi() / atol()"

            default_value 1

            no_define

            requires      { CYGBLD_ISO_STDLIB_STRCONV_HEADER == \

                            "" }

        }

    }

    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 

            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 

            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."

        }

    }

}

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# EOF stdlib.cdl