1 | <?xml version="1.0" encoding="ISO-8859-1"?> |
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2 | <!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN" |
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3 | "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [ |
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4 | <!ENTITY % general-entities SYSTEM "../../general.ent"> |
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5 | %general-entities; |
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6 | ]> |
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7 | |
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8 | <sect1 id="ch-cross-tools-glibc-headers" role="wrap"> |
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9 | <?dbhtml filename="glibc-headers.html"?> |
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10 | |
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11 | <title>Glibc-&glibc-version; Headers</title> |
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12 | |
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13 | <indexterm zone="ch-cross-tools-glibc-headers"> |
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14 | <primary sortas="a-Glibc">Glibc</primary> |
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15 | <secondary>cross tools, headers</secondary> |
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16 | </indexterm> |
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17 | |
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18 | <xi:include xmlns:xi="http://www.w3.org/2003/XInclude" |
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19 | href="../../final-system/common/glibc.xml" |
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20 | xpointer="xpointer(//*[@role='package'])"/> |
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21 | |
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22 | <sect2 role="installation"> |
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23 | <title>Installation of Glibc Headers</title> |
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24 | |
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25 | <para os="s1">Glibc's <filename>configure</filename> script checks the |
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26 | version of GCC, and will fail if it's less than 3.4. The next Glibc build |
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27 | will use the GCC that will be installed into |
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28 | <filename class="directory">/cross-tools</filename> in the next step. |
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29 | However, in this step only the Glibc headers are being installed - no |
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30 | compiling is taking place - so the GCC version isn't important. The |
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31 | following sed removes the dependency of GCC 3.4.x:</para> |
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32 | |
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33 | <screen os="s2"><userinput>cp -v configure{,.orig} |
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34 | sed -e 's/3.4/3.[0-9]/g' configure.orig > configure</userinput></screen> |
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35 | |
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36 | <xi:include xmlns:xi="http://www.w3.org/2003/XInclude" |
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37 | href="../../final-system/common/glibc.xml" |
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38 | xpointer="xpointer(//*[@os='e'])"/> |
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39 | |
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40 | <xi:include xmlns:xi="http://www.w3.org/2003/XInclude" |
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41 | href="../../final-system/common/glibc.xml" |
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42 | xpointer="xpointer(//*[@os='f'])"/> |
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43 | |
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44 | <xi:include xmlns:xi="http://www.w3.org/2003/XInclude" |
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45 | href="../common/glibc.xml" |
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46 | xpointer="xpointer(//*[@os='dd'])"/> |
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47 | |
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48 | <screen os="de"><userinput>cat > config.cache << "EOF" |
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49 | libc_cv_forced_unwind=yes |
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50 | libc_cv_c_cleanup=yes |
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51 | libc_cv_mlong_double_128=yes |
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52 | libc_cv_alpha_tls=yes |
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53 | libc_cv_gnu99_inline=yes |
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54 | EOF</userinput></screen> |
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55 | |
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56 | <xi:include xmlns:xi="http://www.w3.org/2003/XInclude" |
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57 | href="../../final-system/common/glibc.xml" |
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58 | xpointer="xpointer(//*[@os='g'])"/> |
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59 | |
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60 | <screen os="s3"><userinput>CC=gcc ../glibc-&glibc-version;/configure --prefix=/tools \ |
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61 | --host=${CLFS_TARGET} --build=${CLFS_HOST} \ |
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62 | --disable-sanity-checks --enable-kernel=2.6.0 \ |
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63 | --with-headers=/tools/include --cache-file=config.cache \ |
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64 | --with-binutils=/cross-tools/${CLFS_TARGET}/bin</userinput></screen> |
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65 | |
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66 | <note os="e1"> |
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67 | <para><emphasis>Any</emphasis> error message you see about nptl at this point |
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68 | can safely be ignored.</para> |
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69 | </note> |
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70 | |
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71 | <variablelist os="ca"> |
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72 | <title>The meaning of the configure options:</title> |
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73 | |
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74 | <varlistentry os="ca1"> |
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75 | <term><parameter>CC=gcc</parameter></term> |
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76 | <listitem> |
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77 | <para>Tells Glibc to use the host's GCC compiler.</para> |
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78 | </listitem> |
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79 | </varlistentry> |
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80 | |
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81 | <varlistentry os="ca2"> |
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82 | <term><parameter>--prefix=/tools</parameter></term> |
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83 | <listitem> |
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84 | <para>This tells the configure script to prepare to install the |
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85 | package in the <filename class="directory">/tools</filename> |
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86 | directory.</para> |
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87 | </listitem> |
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88 | </varlistentry> |
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89 | |
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90 | <varlistentry os="ca3"> |
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91 | <term><parameter>--build=${CLFS_HOST}</parameter></term> |
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92 | <listitem> |
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93 | <para>When used with --host, this creates a cross-architecture |
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94 | executable that creates files for ${CLFS_TARGET} but runs on ${CLFS_HOST}.</para> |
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95 | </listitem> |
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96 | </varlistentry> |
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97 | |
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98 | <varlistentry os="ca4"> |
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99 | <term><parameter>--host=${CLFS_TARGET}</parameter></term> |
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100 | <listitem> |
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101 | <para>When used with --build, this creates a cross-architecture |
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102 | executable that creates files for ${CLFS_TARGET} but runs on ${CLFS_HOST}.</para> |
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103 | </listitem> |
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104 | </varlistentry> |
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105 | |
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106 | <varlistentry os="ca5"> |
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107 | <term><parameter>--disable-sanity-checks</parameter></term> |
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108 | <listitem> |
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109 | <para>This switch disables any checks that are in place.</para> |
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110 | </listitem> |
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111 | </varlistentry> |
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112 | |
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113 | <varlistentry os="ca6"> |
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114 | <term><parameter>--enable-kernel=2.6.0</parameter></term> |
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115 | <listitem> |
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116 | <para>This tells Glibc to compile the library with support |
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117 | for 2.6.x Linux kernels.</para> |
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118 | </listitem> |
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119 | </varlistentry> |
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120 | |
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121 | <varlistentry os="ca7"> |
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122 | <term><parameter>--with-headers=/tools/include</parameter></term> |
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123 | <listitem> |
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124 | <para>This tells Glibc to compile itself against the headers |
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125 | recently installed to the <filename class="directory">/tools</filename> |
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126 | directory, so that it knows exactly what features the kernel has |
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127 | and can optimize itself accordingly.</para> |
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128 | </listitem> |
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129 | </varlistentry> |
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130 | |
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131 | <varlistentry os="ca8"> |
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132 | <term><parameter>--with-binutils=/cross-tools/${CLFS_TARGET}/bin</parameter></term> |
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133 | <listitem> |
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134 | <para>This tells Glibc to use the Binutils for our specific target architecture.</para> |
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135 | </listitem> |
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136 | </varlistentry> |
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137 | |
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138 | </variablelist> |
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139 | |
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140 | <para os="cb">Now, install the headers:</para> |
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141 | |
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142 | <screen os="cd"><userinput>make install-headers</userinput></screen> |
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143 | |
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144 | <para os="ce">Some files aren't installed by the above command, so |
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145 | we will copy the additional header files we need.</para> |
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146 | |
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147 | <para os="cf">First we will copy a common file over to <filename |
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148 | class="directory">/tools/include</filename>:</para> |
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149 | |
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150 | <screen os="cg"><userinput>install -dv /tools/include/bits |
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151 | cp -v bits/stdio_lim.h /tools/include/bits</userinput></screen> |
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152 | |
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153 | <para os="ch">Now we will create a blank stub file:</para> |
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154 | |
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155 | <screen os="ci"><userinput>touch /tools/include/gnu/stubs.h</userinput></screen> |
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156 | |
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157 | <para os="cj">Another header is needed for NPTL:</para> |
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158 | |
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159 | <screen><userinput>cp -v ../glibc-&glibc-version;/nptl/sysdeps/unix/sysv/linux/alpha/bits/pthreadtypes.h \ |
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160 | /tools/include/bits/</userinput></screen> |
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161 | |
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162 | </sect2> |
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163 | |
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164 | <sect2 role="content"> |
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165 | <title/> |
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166 | |
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167 | <para>Details on this package are located in <xref |
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168 | linkend="contents-glibc" role="."/></para> |
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169 | |
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170 | </sect2> |
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171 | |
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172 | </sect1> |
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