libm.cdl

eCos操作系统源码

# ====================================================================
#
#      libm.cdl
#
#      Maths library 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:  jlarmour
# Contributors:
# Date:           1999-06-13
#
#####DESCRIPTIONEND####
#
# ====================================================================

cdl_package CYGPKG_LIBM {
    display       "Math library"
    doc           ref/libc.html
    description   "
        ISO standard floating point mathematical library
        containing many useful functions for mathematical
        calculations."

    compile       misc/matherr.c misc/standard.c misc/compatmode.cxx          \
                  misc/infconst.c                                             \
                                                                              \
                  double/ieee754-core/e_acos.c double/ieee754-core/e_asin.c   \
                  double/ieee754-core/e_atan2.c double/ieee754-core/e_cosh.c  \
                  double/ieee754-core/e_exp.c double/ieee754-core/e_fmod.c    \
                  double/ieee754-core/e_log.c double/ieee754-core/e_log10.c   \
                  double/ieee754-core/e_pow.c                                 \
                  double/ieee754-core/e_rem_pio2.c                            \
                  double/ieee754-core/e_scalb.c double/ieee754-core/e_sinh.c  \
                  double/ieee754-core/e_sqrt.c                                \
                                                                              \
                  double/ieee754-api/w_acos.c double/ieee754-api/w_asin.c     \
                  double/ieee754-api/w_atan2.c double/ieee754-api/w_cosh.c    \
                  double/ieee754-api/w_exp.c double/ieee754-api/w_fmod.c      \
                  double/ieee754-api/w_log.c double/ieee754-api/w_log10.c     \
                  double/ieee754-api/w_pow.c double/ieee754-api/w_scalb.c     \
                  double/ieee754-api/w_sinh.c double/ieee754-api/w_sqrt.c     \
                                                                              \
                  double/internal/k_cos.c double/internal/k_rem_pio2.c        \
                  double/internal/k_sin.c double/internal/k_tan.c             \
                                                                              \
                  double/portable-api/s_atan.c double/portable-api/s_ceil.c   \
                  double/portable-api/s_copysign.c                            \
                  double/portable-api/s_cos.c double/portable-api/s_expm1.c   \
                  double/portable-api/s_fabs.c double/portable-api/s_finite.c \
                  double/portable-api/s_floor.c double/portable-api/s_frexp.c \
                  double/portable-api/s_isnan.c double/portable-api/s_ldexp.c \
                  double/portable-api/s_rint.c double/portable-api/s_scalbn.c \
                  double/portable-api/s_sin.c double/portable-api/s_tan.c     \
                  double/portable-api/s_modf.c double/portable-api/s_tanh.c


    # COMPATIBILITY-MODE RELATED CONFIGURATION OPTIONS
    cdl_component CYGPKG_LIBM_COMPATIBILITY {
        display       "Compatibility mode"
        flavor        none
        description   "
            These options deal with behaviour related to
            the various compatibility modes - POSIX, IEEE,
            X/OPEN and SVID."

        script        compat.cdl
    }

    # THREAD-SAFETY CONFIGURATION OPTIONS
    cdl_component CYGPKG_LIBM_THREAD_SAFETY {
        display       "Thread safety"
        flavor        none
        description   "
            This option controls whether the C library has
            support for thread safe operation in general.
            This requires eCos kernel support for per-thread
            data, and adjustment of the stack limit."

        cdl_option CYGSEM_LIBM_THREAD_SAFE_COMPAT_MODE {
            display       "Compatibility mode setting"
            requires      !CYGSEM_LIBM_COMPAT_IEEE_ONLY
            requires      CYGVAR_KERNEL_THREADS_DATA
            default_value 0
            description   "
                This option makes the setting of the compatiblity
                mode be a per-thread property. This directly
                implies that it also becomes thread-safe."
        }

        cdl_option CYGSEM_LIBM_THREAD_SAFE_GAMMA_FUNCTIONS {
            display       "gamma() and lgamma()"
            requires      CYGVAR_KERNEL_THREADS_DATA
            default_value 0
            description   "
                This option makes the gamma() and lgamma()
                functions be thread-safe. Note that these
                functions are identical - they take the log of
                the absolute value of their argument. The sign
                of the argument is stored in a variable called
                signgam. Enabling this option makes signgam
                a per-thread variable. Note there are also
                gamma_r() and lgamma_r() alternatives that
                allow signgam to be passed in by reference as
                an argument."
        }
    }

    # TRACING OPTIONS
    cdl_component CYGPKG_LIBM_TRACE {
        display       "Tracing output levels in math library"
        flavor        bool
        requires      CYGDBG_USE_TRACING
        default_value 0
        description   "
            Tracing support is useful for debugging. Some
            Math library modules can be configured with
            different levels of tracing verbosity. These
            levels can be configured here."


        cdl_option CYGNUM_LIBM_COMPATMODE_TRACE_LEVEL {
            display       "Compatibility mode get/set"
            requires      CYGSEM_LIBM_THREAD_SAFE_COMPAT_MODE
            flavor        data
            legal_values  0 to 1
            default_value 0
            description   "
                Trace level for debugging the getting and
                setting of the compatibility mode when it is
                configured to be thread-safe."
        }

        cdl_option CYGNUM_LIBM_SIGNGAM_TRACE_LEVEL {
            display       "signgam variable access"
            requires      CYGSEM_LIBM_THREAD_SAFE_GAMMA_FUNCTIONS
            flavor        data
            legal_values  0 to 1
            default_value 0
            description   "
                Trace level for debugging all accesses to the
                signgam variable in thread-safe mode."
        }
    }

    # OTHER CONFIGURATION SETTINGS
    cdl_option X_TLOSS {
        display       "Bessel function limit of significance"
        flavor        data
        default_value 1.41484755040568800000e+16;  # pi*(2**52)
        legal_values  1 to 1e308;  # FIXME
        description   "
            For the Bessel functions (j0(), j1(), jn(),
            y0(), y1(), yn()) this option defines the
            maximum absolute value of the ordinate
            before we assume total loss of significance.
            This number must be a floating-point number (e.g.
            contains a decimal point), and should be
            large."
    }

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

        puts $::cdl_header "#include <pkgconf/system.h>"

        # TYPE DEFINITIONS
        # Compatibility mode selector - required for default below

        puts $::cdl_header "typedef enum {"
        puts $::cdl_header "    CYGNUM_LIBM_COMPAT_UNINIT= 0,  // Default state. DO NOT set it to this"
        puts $::cdl_header "    CYGNUM_LIBM_COMPAT_POSIX = 1,  // ANSI/POSIX 1003.1"
        puts $::cdl_header "    CYGNUM_LIBM_COMPAT_IEEE  = 2,  // IEEE-754"
        puts $::cdl_header "    CYGNUM_LIBM_COMPAT_XOPEN = 3,  // X/OPEN Portability guide issue 3"
        puts $::cdl_header "                                   // (XPG3)"
        puts $::cdl_header "    CYGNUM_LIBM_COMPAT_SVID  = 4   // System V Interface Definition 3rd"
        puts $::cdl_header "                                   // edition"
        puts $::cdl_header "} Cyg_libm_compat_t;"
        puts $::cdl_header ""

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

    cdl_component CYGPKG_LIBM_OPTIONS {
        display "Math library build options"
        flavor  none
        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_LIBM_CFLAGS_ADD {
            display "Additional compiler flags"
            flavor  data
            no_define
            default_value { ((0 == CYGPKG_HAL_I386) && (0 == CYGPKG_HAL_SYNTH_I386)) ? "" : "-ffloat-store" }
            description   "
                This option modifies the set of compiler flags for
                building the math library. These flags are used in addition
                to the set of global flags."
        }

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

        cdl_option CYGPKG_LIBM_TESTS {
            display "Math library tests"
            flavor  data
            no_define
            calculated { "tests/vectors/acos tests/vectors/asin tests/vectors/atan tests/vectors/atan2 tests/vectors/ceil tests/vectors/cos tests/vectors/cosh tests/vectors/exp tests/vectors/fabs tests/vectors/floor tests/vectors/fmod tests/vectors/frexp tests/vectors/ldexp tests/vectors/log tests/vectors/log10 tests/vectors/modf tests/vectors/pow tests/vectors/sin tests/vectors/sinh tests/vectors/sqrt tests/vectors/tan tests/vectors/tanh" }
            description   "
                This option specifies the set of tests for the math library."
        }
    }
}