[a9e389d] | 1 | <?xml version="1.0" encoding="ISO-8859-1"?> |
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[bd48e48] | 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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[a9e389d] | 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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[b128a0e] | 8 | <!-- Common GCC-Static --> |
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| 9 | |
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[a9e389d] | 10 | <sect1 id="ch-cross-tools-gcc-static" role="wrap"> |
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| 11 | <?dbhtml filename="gcc-static.html"?> |
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| 12 | |
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| 13 | <title>Cross GCC-&gcc-version; - Static</title> |
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| 14 | |
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| 15 | <indexterm zone="ch-cross-tools-gcc-static"> |
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| 16 | <primary sortas="a-GCC">GCC</primary> |
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| 17 | <secondary>cross tools, static</secondary> |
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| 18 | </indexterm> |
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| 19 | |
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| 20 | <sect2 role="package"> |
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| 21 | <title/> |
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| 22 | |
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| 23 | <para>The GCC package contains the GNU compiler collection, which includes |
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[113a63a] | 24 | the C compiler.</para> |
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[a9e389d] | 25 | |
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| 26 | </sect2> |
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| 27 | |
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| 28 | <sect2 role="installation"> |
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[ae51e2a] | 29 | <title os="a">Installation of Cross GCC Compiler with Static libgcc |
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[a9e389d] | 30 | and no Threads</title> |
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| 31 | |
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[c01e552] | 32 | <para os="aa">In order to work with musl-libc, GCC needs to be patched:</para> |
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| 33 | |
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| 34 | <screen os="ab"><userinput>patch -Np1 -i ../&gcc-musl-patch;</userinput></screen> |
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| 35 | |
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[8a77fbd] | 36 | <para os="b">GCC requires the GMP, MPFR, and MPC packages to either be |
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| 37 | present on the host or to be present in source form within the gcc source |
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| 38 | tree. Unpack these into the GCC directory after unpacking GCC:</para> |
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| 39 | |
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| 40 | <screen os="ba"><userinput>tar xf ../mpfr-&mpfr-version;.tar.bz2 |
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| 41 | mv -v mpfr-&mpfr-version; mpfr |
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| 42 | tar xf ../gmp-&gmp-version;.tar.bz2 |
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| 43 | mv -v gmp-&gmp-version; gmp |
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| 44 | tar xf ../mpc-&mpc-version;.tar.gz |
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| 45 | mv -v mpc-&mpc-version; mpc</userinput></screen> |
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| 46 | |
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[a9e389d] | 47 | <para os="c">The GCC documentation recommends building GCC outside of the source |
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| 48 | directory in a dedicated build directory:</para> |
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| 49 | |
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| 50 | <screen os="d"><userinput>mkdir -v ../gcc-build |
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| 51 | cd ../gcc-build</userinput></screen> |
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| 52 | |
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| 53 | <para os="e">Prepare GCC for compilation:</para> |
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| 54 | |
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[ae51e2a] | 55 | <!-- This is the common configure line for GCC-Static. --> |
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| 56 | <!-- It's not actually used by any arch but is here for reference. --> |
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[146587b] | 57 | <screen os="ae"><userinput>../gcc-&gcc-version;/configure \ |
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[54fde8f] | 58 | --prefix=${CLFS}/cross-tools \ |
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| 59 | --build=${CLFS_HOST} \ |
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| 60 | --host=${CLFS_HOST} \ |
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| 61 | --target=${CLFS_TARGET} \ |
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[94e2400] | 62 | --with-sysroot=${CLFS}/cross-tools/${CLFS_TARGET} \ |
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[54fde8f] | 63 | --disable-nls \ |
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| 64 | --disable-shared \ |
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| 65 | --without-headers \ |
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| 66 | --with-newlib \ |
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| 67 | --disable-decimal-float \ |
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| 68 | --disable-libgomp \ |
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| 69 | --disable-libmudflap \ |
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| 70 | --disable-libssp \ |
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[6368159] | 71 | --disable-libatomic \ |
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| 72 | --disable-libquadmath \ |
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[54fde8f] | 73 | --disable-threads \ |
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| 74 | --enable-languages=c \ |
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[5f18bea] | 75 | --disable-multilib \ |
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| 76 | --with-mpfr-include=$(pwd)/../gcc-&gcc-version;/mpfr/src \ |
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| 77 | --with-mpfr-lib=$(pwd)/mpfr/src/.libs</userinput></screen> |
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[a9e389d] | 78 | |
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| 79 | <variablelist os="af"> |
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| 80 | <title>The meaning of the configure options:</title> |
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| 81 | |
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[f704d3f] | 82 | <varlistentry os="af1"> |
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| 83 | <term><parameter>--prefix=${CLFS}/cross-tools</parameter></term> |
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| 84 | <listitem> |
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| 85 | <para>This tells the configure script to prepare to install the |
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| 86 | package in the <filename class="directory">${CLFS}/cross-tools</filename> |
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| 87 | directory.</para> |
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| 88 | </listitem> |
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| 89 | </varlistentry> |
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| 90 | |
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| 91 | <varlistentry os="af2"> |
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| 92 | <term><parameter>--build=${CLFS_HOST}</parameter></term> |
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| 93 | <listitem> |
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| 94 | <para>This tells the configure script the triplet to use to build GCC. |
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| 95 | It will use ${CLFS_HOST} as that's where it's being built.</para> |
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| 96 | </listitem> |
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| 97 | </varlistentry> |
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| 98 | |
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| 99 | <varlistentry os="af3"> |
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| 100 | <term><parameter>--host=${CLFS_HOST}</parameter></term> |
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| 101 | <listitem> |
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| 102 | <para>This tells the configure script the triplet of the machine GCC |
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| 103 | will be executed on when actually cross compiling. It will use |
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| 104 | ${CLFS_HOST} as that's where GCC will execute when cross compiling |
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| 105 | software later.</para> |
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| 106 | </listitem> |
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| 107 | </varlistentry> |
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| 108 | |
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| 109 | <varlistentry os="af4"> |
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| 110 | <term><parameter>--target=${CLFS_TARGET}</parameter></term> |
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| 111 | <listitem> |
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| 112 | <para>This tells the configure script the triplet of the machine GCC |
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| 113 | will build executables for. It will use ${CLFS_TARGET} so that software |
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| 114 | compiled with this version of GCC can be executed on the embedded machine |
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| 115 | target.</para> |
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| 116 | </listitem> |
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| 117 | </varlistentry> |
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| 118 | |
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| 119 | <varlistentry os="af5"> |
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[94e2400] | 120 | <term><parameter>--with-sysroot=${CLFS}/cross-tools/${CLFS_TARGET}</parameter></term> |
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[f704d3f] | 121 | <listitem> |
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[94e2400] | 122 | <para>This tells configure that ${CLFS}/cross-tools/${CLFS_TARGET} is going |
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[13d7c4f] | 123 | to be the temporary root of our system. It will now use the specified |
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| 124 | sysroot as a prefix of the default search paths.</para> |
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[f704d3f] | 125 | </listitem> |
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| 126 | </varlistentry> |
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| 127 | |
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| 128 | <varlistentry os="af6"> |
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| 129 | <term><parameter>--disable-nls</parameter></term> |
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| 130 | <listitem> |
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| 131 | <para>This disables internationalization as i18n is not needed for the |
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| 132 | cross-compile tools.</para> |
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| 133 | </listitem> |
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| 134 | </varlistentry> |
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| 135 | |
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| 136 | <varlistentry os="af7"> |
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[a9e389d] | 137 | <term><parameter>--disable-shared</parameter></term> |
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| 138 | <listitem> |
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| 139 | <para>Disables the creation of the shared libraries.</para> |
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| 140 | </listitem> |
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| 141 | </varlistentry> |
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| 142 | |
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[f704d3f] | 143 | <varlistentry os="af11"> |
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| 144 | <term><parameter>--without-headers</parameter></term> |
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| 145 | <listitem> |
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| 146 | <para>Tells configure to not use any headers from any C libraries. |
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| 147 | This is needed as we haven't yet built the C library and to prevent |
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| 148 | influence from the host environment.</para> |
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| 149 | </listitem> |
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| 150 | </varlistentry> |
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| 151 | |
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| 152 | <varlistentry os="af12"> |
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| 153 | <term><parameter>--with-newlib</parameter></term> |
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| 154 | <listitem> |
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| 155 | <para>Tells configure to build libgcc without needing any C |
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| 156 | libraries.</para> |
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| 157 | </listitem> |
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| 158 | </varlistentry> |
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| 159 | |
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| 160 | <varlistentry os="af13"> |
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| 161 | <term><parameter>--disable-decimal-float</parameter></term> |
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| 162 | <listitem> |
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| 163 | <para>Tells configure to disable IEEE 754-2008 decimal floating |
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| 164 | point support. Decimal floating point support isn't needed yet.</para> |
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| 165 | </listitem> |
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| 166 | </varlistentry> |
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| 167 | |
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| 168 | <varlistentry os="af14"> |
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| 169 | <term><parameter>--disable-libgomp</parameter></term> |
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| 170 | <listitem> |
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| 171 | <para>Tells configure to not build the GOMP run-time libraries. |
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| 172 | GOMP is the GNU implementation of OpenMP, a API for shared-memory |
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| 173 | parallel programming.</para> |
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| 174 | </listitem> |
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| 175 | </varlistentry> |
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| 176 | |
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| 177 | <varlistentry os="af15"> |
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| 178 | <term><parameter>--disable-libmudflap</parameter></term> |
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| 179 | <listitem> |
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| 180 | <para>Tells configure to not build libmudflap. Mudflap is a |
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| 181 | library that can be used to help check for proper pointer usage.</para> |
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| 182 | </listitem> |
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| 183 | </varlistentry> |
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| 184 | |
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| 185 | <varlistentry os="af16"> |
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| 186 | <term><parameter>--disable-libssp</parameter></term> |
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| 187 | <listitem> |
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| 188 | <para>Tells configure not to build run-time libraries for stack |
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| 189 | smashing detection.</para> |
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| 190 | </listitem> |
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| 191 | </varlistentry> |
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| 192 | |
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| 193 | <varlistentry os="af17"> |
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[6368159] | 194 | <term><parameter>--disable-libatomic</parameter></term> |
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| 195 | <listitem> |
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| 196 | <para>Tells configure not to build atomic operations.</para> |
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| 197 | </listitem> |
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| 198 | </varlistentry> |
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| 199 | |
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| 200 | <varlistentry os="af18"> |
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| 201 | <term><parameter>--disable-libquadmath</parameter></term> |
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| 202 | <listitem> |
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| 203 | <para>Tells configure not to build quad math operations.</para> |
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| 204 | </listitem> |
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| 205 | </varlistentry> |
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| 206 | |
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| 207 | <varlistentry os="af19"> |
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[a9e389d] | 208 | <term><parameter>--disable-threads</parameter></term> |
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| 209 | <listitem> |
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| 210 | <para>This will prevent GCC from looking for the multi-thread |
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| 211 | include files, since they haven't been created for this architecture |
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| 212 | yet. GCC will be able to find the multi-thread information after |
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[f704d3f] | 213 | the glib headers are created.</para> |
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[a9e389d] | 214 | </listitem> |
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| 215 | </varlistentry> |
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| 216 | |
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[6368159] | 217 | <varlistentry os="af20"> |
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[a9e389d] | 218 | <term><parameter>--enable-languages=c</parameter></term> |
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| 219 | <listitem> |
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| 220 | <para>This option ensures that only the C compiler is built.</para> |
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| 221 | </listitem> |
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| 222 | </varlistentry> |
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| 223 | |
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[5f18bea] | 224 | <varlistentry os="af21"> |
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| 225 | <term><parameter>--disable-multilib</parameter></term> |
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| 226 | <listitem> |
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| 227 | <para>This option specifies that multiple target libraries should |
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| 228 | not be built.</para> |
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| 229 | </listitem> |
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| 230 | </varlistentry> |
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| 231 | |
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| 232 | <varlistentry os="af22"> |
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| 233 | <term><parameter>--with-mpfr-include=$(pwd)/../gcc-&gcc-version;/mpfr/src</parameter></term> |
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| 234 | <listitem> |
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| 235 | <para>Tells configure how to find the mpfr headers.</para> |
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| 236 | </listitem> |
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| 237 | </varlistentry> |
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| 238 | |
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| 239 | <varlistentry os="af23"> |
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| 240 | <term><parameter>--with-mpfr-lib=$(pwd)/mpfr/src/.libs</parameter></term> |
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| 241 | <listitem> |
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| 242 | <para>Tells configure to use the mpfr libraries built within the GCC |
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| 243 | build directory. This happens automatically but is needed to |
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| 244 | prevent GCC from searching the host's normal library paths.</para> |
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| 245 | </listitem> |
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| 246 | </varlistentry> |
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[0f33b23] | 247 | |
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[a9e389d] | 248 | </variablelist> |
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| 249 | |
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[ae51e2a] | 250 | <para os="ah">Continue with compiling the package:</para> |
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[a9e389d] | 251 | |
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[ae51e2a] | 252 | <screen os="ai"><userinput>make all-gcc all-target-libgcc</userinput></screen> |
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[a9e389d] | 253 | |
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[ae51e2a] | 254 | <para os="aj">Install the package:</para> |
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[a9e389d] | 255 | |
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[ae51e2a] | 256 | <screen os="ak"><userinput>make install-gcc install-target-libgcc</userinput></screen> |
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[a9e389d] | 257 | |
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| 258 | </sect2> |
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| 259 | |
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| 260 | <sect2 role="content"> |
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| 261 | <title/> |
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| 262 | |
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| 263 | <para>Details on this package are located in <xref |
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| 264 | linkend="contents-gcc" role="."/></para> |
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| 265 | |
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| 266 | </sect2> |
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| 267 | |
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| 268 | </sect1> |
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