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annotate packages/language/c/libc/stdlib/current/cdl/stdlib.cdl @ 115:6ed91473a1cd ecos-sw-2000-08-21

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Merge from eCos master repository on 2000-08-21-22:40:54-BST
author jlarmour
date Fri, 25 Aug 2000 17:32:38 +0000
parents
children 0d2b193a635f
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115
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1 # ====================================================================
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2 #
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3 # stdlib.cdl
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4 #
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5 # C library stdlib related configuration data
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6 #
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7 # ====================================================================
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8 #####COPYRIGHTBEGIN####
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9 #
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10 # -------------------------------------------
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11 # The contents of this file are subject to the Red Hat eCos Public License
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12 # Version 1.1 (the "License"); you may not use this file except in
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13 # compliance with the License. You may obtain a copy of the License at
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14 # http://www.redhat.com/
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15 #
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16 # Software distributed under the License is distributed on an "AS IS"
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17 # basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
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18 # License for the specific language governing rights and limitations under
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19 # the License.
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20 #
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21 # The Original Code is eCos - Embedded Configurable Operating System,
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22 # released September 30, 1998.
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23 #
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24 # The Initial Developer of the Original Code is Red Hat.
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25 # Portions created by Red Hat are
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26 # Copyright (C) 1998, 1999, 2000 Red Hat, Inc.
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27 # All Rights Reserved.
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28 # -------------------------------------------
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29 #
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30 #####COPYRIGHTEND####
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31 # ====================================================================
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32 ######DESCRIPTIONBEGIN####
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33 #
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34 # Author(s): jlarmour
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35 # Contributors:
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36 # Date: 2000-04-14
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37 #
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38 #####DESCRIPTIONEND####
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39 #
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40 # ====================================================================
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41
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42 cdl_package CYGPKG_LIBC_STDLIB {
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43 display "ISO C library general utility functions"
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44 description "
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45 This package provides general utility functions in <stdlib.h>
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46 as specified by the ISO C standard - ISO/IEC 9899:1990."
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47 doc redirect/the-iso-standard-c-and-math-libraries.html
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48 include_dir cyg/libc/stdlib
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49 parent CYGPKG_LIBC
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50 requires CYGPKG_ISOINFRA
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51 implements CYGINT_ISO_STDLIB_STRCONV
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52 implements CYGINT_ISO_STDLIB_ENVIRON
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53 implements CYGINT_ISO_STDLIB_SYSTEM
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54 implements CYGINT_ISO_BSEARCH
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55 implements CYGINT_ISO_QSORT
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56 implements CYGINT_ISO_ABS
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57 implements CYGINT_ISO_DIV
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58 requires CYGINT_ISO_CTYPE
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59
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60 compile abs.cxx atox.cxx bsearch.cxx \
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61 div.cxx getenv.cxx qsort.cxx \
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62 rand.cxx strtod.cxx strtol.cxx \
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63 strtoul.cxx system.cxx
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64
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65 # ====================================================================
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66
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67 cdl_component CYGIMP_LIBC_STDLIB_INLINES {
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68 display "Inline versions of <stdlib.h> functions"
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69 flavor none
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70 no_define
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71 description "
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72 This option chooses whether some of the
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73 particularly simple standard utility functions
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74 from <stdlib.h> are available as inline
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75 functions. This may improve performance, and as
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76 the functions are small, may even improve code
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77 size."
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78
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79 cdl_option CYGIMP_LIBC_STDLIB_INLINE_ABS {
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80 display "abs() / labs()"
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81 default_value 1
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82 no_define
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83 requires { CYGBLD_ISO_STDLIB_ABS_HEADER == \
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84 "<cyg/libc/stdlib/abs.inl>" }
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85 }
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86
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87 cdl_option CYGIMP_LIBC_STDLIB_INLINE_DIV {
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88 display "div() / ldiv()"
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89 default_value 1
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90 no_define
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91 requires { CYGBLD_ISO_STDLIB_DIV_HEADER == \
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92 "<cyg/libc/stdlib/div.inl>" }
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93 }
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94
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95 cdl_option CYGIMP_LIBC_STDLIB_INLINE_ATOX {
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96 display "atof() / atoi() / atol()"
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97 default_value 1
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98 no_define
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99 requires { CYGBLD_ISO_STDLIB_STRCONV_HEADER == \
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100 "<cyg/libc/stdlib/atox.inl>" }
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101 }
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102 }
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103
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104 cdl_component CYGPKG_LIBC_RAND {
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105 display "Random number generation"
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106 flavor none
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107 description "
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108 These options control the behaviour of the
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109 functions rand(), srand() and rand_r()"
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110
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111 cdl_option CYGSEM_LIBC_PER_THREAD_RAND {
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112 display "Per-thread random seed"
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113 requires CYGVAR_KERNEL_THREADS_DATA
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114 default_value 0
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115 description "
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116 This option controls whether the pseudo-random
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117 number generation functions rand() and srand()
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118 have their state recorded on a per-thread
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119 basis rather than global. If this option is
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120 disabled, some per-thread space can be saved.
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121 Note there is also a POSIX-standard rand_r()
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122 function to achieve a similar effect with user
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123 support. Enabling this option will use one slot
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124 of kernel per-thread data. You should ensure you
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125 have enough slots configured for all your
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126 per-thread data."
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127 }
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128
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129 cdl_option CYGNUM_LIBC_RAND_SEED {
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130 display "Random number seed"
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131 flavor data
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132 legal_values 0 to 0x7fffffff
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133 default_value 1
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134 description "
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135 This selects the initial random number seed for
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136 rand()'s pseudo-random number generator. For
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137 strict ISO standard compliance, this should be 1,
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138 as per section 7.10.2.2 of the standard."
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139 }
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140
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141 cdl_option CYGNUM_LIBC_RAND_TRACE_LEVEL {
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142 display "Tracing level"
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143 flavor data
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144 legal_values 0 to 1
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145 default_value 0
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146 description "
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147 Trace verbosity level for debugging the rand(),
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148 srand() and rand_r() functions. Increase this
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149 value to get additional trace output."
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150 }
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151
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152 cdl_option CYGIMP_LIBC_RAND_SIMPLEST {
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153 display "Simplest implementation"
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154 flavor bool
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155 default_value 0
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156 implements CYGINT_ISO_RAND
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157 description "
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158 This provides a very simple implementation of rand()
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159 that does not perform well with randomness in the
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160 lower significant bits. However it is exceptionally
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161 fast. It uses the sample algorithm from the ISO C
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162 standard itself."
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163 }
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164
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165 cdl_option CYGIMP_LIBC_RAND_SIMPLE1 {
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166 display "Simple implementation #1"
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167 flavor bool
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168 default_value 1
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169 implements CYGINT_ISO_RAND
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170 description "
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171 This provides a very simple implementation of rand()
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172 based on the simplest implementation above. However
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173 it does try to work around the lack of randomness
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174 in the lower significant bits, at the expense of a
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175 little speed."
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176 }
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177
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178 cdl_option CYGIMP_LIBC_RAND_KNUTH1 {
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179 display "Knuth implementation #1"
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180 flavor bool
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181 default_value 0
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182 implements CYGINT_ISO_RAND
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183 description "
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184 This implements a slightly more complex algorithm
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185 published in Donald E. Knuth's Art of Computer
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186 Programming Vol.2 section 3.6 (p.185 in the 3rd ed.).
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187 This produces better random numbers than the
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188 simplest approach but is slower."
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189 }
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190 }
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191
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192 cdl_option CYGFUN_LIBC_strtod {
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193 display "Provides strtod()"
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194 requires CYGPKG_LIBM
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195 default_value { 0 != CYGPKG_LIBM }
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196 implements CYGINT_ISO_STDLIB_STRCONV_FLOAT
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197 description "
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198 This option allows use of the utility function
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199 strtod() (and consequently atof()) to convert
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200 from string to double precision floating point
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201 numbers. Disabling this option removes the
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202 dependency on the math library package."
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203 }
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204
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205 cdl_option CYGNUM_LIBC_BSEARCH_TRACE_LEVEL {
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206 display "bsearch() tracing level"
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207 flavor data
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208 legal_values 0 to 1
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209 default_value 0
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210 description "
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211 Trace verbosity level for debugging the <stdlib.h>
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212 binary search function bsearch(). Increase this
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213 value to get additional trace output."
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214 }
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215
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216 cdl_option CYGNUM_LIBC_QSORT_TRACE_LEVEL {
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217 display "qsort() tracing level"
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218 flavor data
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219 legal_values 0 to 1
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220 default_value 0
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221 description "
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222 Trace verbosity level for debugging the <stdlib.h>
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223 quicksort function qsort(). Increase this value
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224 to get additional trace output."
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225 }
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226
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227
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228 # ====================================================================
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229
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230 cdl_component CYGPKG_LIBC_STDLIB_OPTIONS {
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231 display "C library stdlib build options"
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232 flavor none
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233 no_define
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234 description "
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235 Package specific build options including control over
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236 compiler flags used only in building this package,
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237 and details of which tests are built."
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238
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239
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240 cdl_option CYGPKG_LIBC_STDLIB_CFLAGS_ADD {
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241 display "Additional compiler flags"
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242 flavor data
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243 no_define
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244 default_value { "" }
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245 description "
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246 This option modifies the set of compiler flags for
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247 building this package. These flags are used in addition
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248 to the set of global flags."
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249 }
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250
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251 cdl_option CYGPKG_LIBC_STDLIB_CFLAGS_REMOVE {
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252 display "Suppressed compiler flags"
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253 flavor data
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254 no_define
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255 default_value { "" }
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256 description "
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257 This option modifies the set of compiler flags for
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258 building this package. These flags are removed from
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259 the set of global flags if present."
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260 }
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261
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262 cdl_option CYGPKG_LIBC_STDLIB_TESTS {
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263 display "C library stdlib tests"
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264 flavor data
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265 no_define
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266 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" }
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267 description "
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268 This option specifies the set of tests for this package."
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269 }
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270 }
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271 }
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272
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273 # ====================================================================
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274 # EOF stdlib.cdl