1 | <?xml version="1.0" encoding="ISO-8859-1"?> |
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2 | <!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.4//EN" |
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3 | "http://www.oasis-open.org/docbook/xml/4.4/docbookx.dtd" [ |
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4 | <!ENTITY % general-entities SYSTEM "../../general.ent"> |
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5 | <!ENTITY % patches-entities SYSTEM "../../patches.ent"> |
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6 | %general-entities; |
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7 | %patches-entities; |
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8 | ]> |
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9 | |
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10 | <sect1 id="ch-system-gcc" role="wrap"> |
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11 | <?dbhtml filename="gcc.html"?> |
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12 | |
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13 | <title>GCC-&gcc-version;</title> |
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14 | |
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15 | <indexterm zone="ch-system-gcc"> |
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16 | <primary sortas="a-GCC">GCC</primary> |
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17 | </indexterm> |
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18 | |
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19 | <sect2 role="package"> |
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20 | <title/> |
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21 | |
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22 | <para>The GCC package contains the GNU compiler collection, which includes |
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23 | the C and C++ compilers.</para> |
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24 | |
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25 | <segmentedlist> |
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26 | <segtitle>&buildtime;</segtitle> |
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27 | <segtitle>&diskspace;</segtitle> |
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28 | |
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29 | <seglistitem> |
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30 | <seg>Not checked yet</seg> |
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31 | <seg>Not checked yet</seg> |
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32 | </seglistitem> |
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33 | </segmentedlist> |
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34 | |
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35 | <segmentedlist> |
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36 | <segtitle>&dependencies;</segtitle> |
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37 | |
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38 | <seglistitem> |
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39 | <seg>Bash, Binutils, Coreutils, Diffutils, Findutils, |
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40 | Gawk, Gettext, Glibc, Grep, Make, Perl, Sed, and Texinfo</seg> |
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41 | </seglistitem> |
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42 | </segmentedlist> |
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43 | |
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44 | </sect2> |
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45 | |
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46 | <sect2 role="installation"> |
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47 | <title>Installation of GCC</title> |
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48 | |
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49 | <para os="a">This package is known to have issues when its default |
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50 | optimization flags (including the <option>-march</option> and |
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51 | <option>-mcpu</option> options) are changed. If any environment |
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52 | variables that override default optimizations have been defined, such |
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53 | as <envar>CFLAGS</envar> and <envar>CXXFLAGS</envar>, |
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54 | unset them when building GCC.</para> |
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55 | |
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56 | <para os="d">Apply a <command>sed</command> substitution that will suppress the |
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57 | installation of <filename class="libraryfile">libiberty.a</filename>. The |
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58 | version of <filename class="libraryfile">libiberty.a</filename> provided by |
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59 | Binutils will be used instead:</para> |
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60 | |
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61 | <screen os="e"><userinput>sed -i 's/install_to_$(INSTALL_DEST) //' libiberty/Makefile.in</userinput></screen> |
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62 | |
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63 | <para os="f">The GCC documentation recommends building GCC outside of the source |
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64 | directory in a dedicated build directory:</para> |
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65 | |
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66 | <screen os="g"><userinput>mkdir ../gcc-build |
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67 | cd ../gcc-build</userinput></screen> |
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68 | |
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69 | <para os="h">Prepare GCC for compilation:</para> |
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70 | |
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71 | <screen><userinput>../gcc-&gcc-version;/configure --prefix=/usr \ |
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72 | --libexecdir=/usr/lib --enable-shared --enable-threads=posix \ |
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73 | --enable-__cxa_atexit --enable-c99 --enable-long-long \ |
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74 | --enable-clocale=gnu --enable-languages=c,c++ --disable-libstdcxx-pch</userinput></screen> |
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75 | |
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76 | <para os="i">Compile the package:</para> |
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77 | |
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78 | <screen os="j"><userinput>make</userinput></screen> |
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79 | |
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80 | <important os="k"> |
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81 | <para>In this section, the test suite for GCC is considered |
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82 | critical. Do not skip it under any circumstance.</para> |
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83 | </important> |
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84 | |
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85 | <para os="l">Test the results, but do not stop at errors:</para> |
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86 | |
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87 | <screen os="m"><userinput>make -k check</userinput></screen> |
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88 | |
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89 | <para os="n">The <parameter>-k</parameter> flag is used to make the test suite |
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90 | run through to completion and not stop at the first failure. The GCC test |
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91 | suite is very comprehensive and is almost guaranteed to generate a few |
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92 | failures. To receive a summary of the test suite results, run:</para> |
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93 | |
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94 | <screen os="o"><userinput>../gcc-&gcc-version;/contrib/test_summary</userinput></screen> |
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95 | |
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96 | <para os="p">For only the summaries, pipe the output through |
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97 | <userinput>grep -A7 Summ</userinput>.</para> |
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98 | |
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99 | <para os="q">Results can be compared with those located at <ulink |
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100 | url="&test-results;"/>.</para> |
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101 | |
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102 | <para os="r">A few unexpected failures cannot always be avoided. The |
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103 | GCC developers are usually aware of these issues, but have not |
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104 | resolved them yet. Unless the test results are vastly different from |
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105 | those at the above URL, it is safe to continue.</para> |
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106 | |
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107 | <para os="s">Install the package:</para> |
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108 | |
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109 | <screen os="t"><userinput>make install</userinput></screen> |
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110 | |
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111 | <para os="u">Some packages expect the C preprocessor to be installed in the |
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112 | <filename class="directory">/lib</filename> directory. |
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113 | To support those packages, create this symlink:</para> |
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114 | |
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115 | <screen os="v"><userinput>ln -s ../usr/bin/cpp /lib</userinput></screen> |
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116 | |
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117 | <para os="w">Many packages use the name <command>cc</command> to call the C |
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118 | compiler. To satisfy those packages, create a symlink:</para> |
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119 | |
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120 | <screen os="x"><userinput>ln -s gcc /usr/bin/cc</userinput></screen> |
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121 | |
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122 | </sect2> |
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123 | |
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124 | <sect2 id="contents-gcc" role="content"> |
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125 | <title>Contents of GCC</title> |
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126 | |
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127 | <segmentedlist> |
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128 | <segtitle>Installed programs</segtitle> |
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129 | <segtitle>Installed libraries</segtitle> |
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130 | |
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131 | <seglistitem> |
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132 | <seg>c++, cc (link to gcc), cpp, g++, gcc, gccbug, and gcov</seg> |
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133 | <seg>libgcc.a, libgcc_eh.a, libgcc_s.so, libstdc++.[a,so], and |
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134 | libsupc++.a</seg> |
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135 | </seglistitem> |
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136 | </segmentedlist> |
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137 | |
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138 | <variablelist> |
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139 | <bridgehead renderas="sect3">Short Descriptions</bridgehead> |
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140 | <?dbfo list-presentation="list"?> |
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141 | <?dbhtml list-presentation="table"?> |
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142 | |
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143 | <varlistentry id="cc"> |
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144 | <term><command>cc</command></term> |
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145 | <listitem> |
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146 | <para>The C compiler</para> |
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147 | <indexterm zone="ch-system-gcc cc"> |
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148 | <primary sortas="b-cc">cc</primary> |
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149 | </indexterm> |
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150 | </listitem> |
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151 | </varlistentry> |
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152 | |
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153 | <varlistentry id="cpp"> |
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154 | <term><command>cpp</command></term> |
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155 | <listitem> |
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156 | <para>The C preprocessor; it is used by the compiler to expand the |
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157 | #include, #define, and similar statements in the source files</para> |
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158 | <indexterm zone="ch-system-gcc cpp"> |
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159 | <primary sortas="b-cpp">cpp</primary> |
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160 | </indexterm> |
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161 | </listitem> |
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162 | </varlistentry> |
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163 | |
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164 | <varlistentry id="c"> |
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165 | <term><command>c++</command></term> |
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166 | <listitem> |
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167 | <para>The C++ compiler</para> |
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168 | <indexterm zone="ch-system-gcc c"> |
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169 | <primary sortas="b-c++">c++</primary> |
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170 | </indexterm> |
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171 | </listitem> |
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172 | </varlistentry> |
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173 | |
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174 | <varlistentry id="g"> |
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175 | <term><command>g++</command></term> |
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176 | <listitem> |
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177 | <para>The C++ compiler</para> |
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178 | <indexterm zone="ch-system-gcc g"> |
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179 | <primary sortas="b-g++">g++</primary> |
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180 | </indexterm> |
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181 | </listitem> |
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182 | </varlistentry> |
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183 | |
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184 | <varlistentry id="gcc"> |
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185 | <term><command>gcc</command></term> |
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186 | <listitem> |
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187 | <para>The C compiler</para> |
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188 | <indexterm zone="ch-system-gcc gcc"> |
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189 | <primary sortas="b-gcc">gcc</primary> |
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190 | </indexterm> |
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191 | </listitem> |
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192 | </varlistentry> |
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193 | |
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194 | <varlistentry id="gccbug"> |
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195 | <term><command>gccbug</command></term> |
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196 | <listitem> |
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197 | <para>A shell script used to help create useful bug reports</para> |
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198 | <indexterm zone="ch-system-gcc gccbug"> |
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199 | <primary sortas="b-gccbug">gccbug</primary> |
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200 | </indexterm> |
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201 | </listitem> |
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202 | </varlistentry> |
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203 | |
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204 | <varlistentry id="gcov"> |
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205 | <term><command>gcov</command></term> |
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206 | <listitem> |
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207 | <para>A coverage testing tool; it is used to analyze programs to |
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208 | determine where optimizations will have the most effect</para> |
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209 | <indexterm zone="ch-system-gcc gcov"> |
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210 | <primary sortas="b-gcov">gcov</primary> |
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211 | </indexterm> |
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212 | </listitem> |
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213 | </varlistentry> |
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214 | |
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215 | <varlistentry id="libgcc"> |
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216 | <term><filename class="libraryfile">libgcc</filename></term> |
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217 | <listitem> |
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218 | <para>Contains run-time support for <command>gcc</command></para> |
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219 | <indexterm zone="ch-system-gcc libgcc"> |
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220 | <primary sortas="c-libgcc*">libgcc*</primary> |
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221 | </indexterm> |
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222 | </listitem> |
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223 | </varlistentry> |
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224 | |
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225 | <varlistentry id="libstdc"> |
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226 | <term><filename class="libraryfile">libstdc++</filename></term> |
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227 | <listitem> |
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228 | <para>The standard C++ library</para> |
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229 | <indexterm zone="ch-system-gcc libstdc"> |
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230 | <primary sortas="c-libstdc++">libstdc++</primary> |
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231 | </indexterm> |
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232 | </listitem> |
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233 | </varlistentry> |
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234 | |
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235 | <varlistentry id="libsupc"> |
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236 | <term><filename class="libraryfile">libsupc++</filename></term> |
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237 | <listitem> |
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238 | <para>Provides supporting routines for the C++ programming |
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239 | language</para> |
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240 | <indexterm zone="ch-system-gcc libsupc"> |
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241 | <primary sortas="c-libsupc++">libsupc++</primary> |
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242 | </indexterm> |
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243 | </listitem> |
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244 | </varlistentry> |
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245 | |
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246 | </variablelist> |
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247 | |
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248 | </sect2> |
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249 | |
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250 | </sect1> |
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