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<a name="top" id="top"></a>
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<h1 id="firstHeading" class="firstHeading">Compiling a lightweight Mico32 toolchain</h1>
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<h3 id="siteSub">From Milkymist Wiki</h3>
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<div id="jump-to-nav">Jump to: <a href="index.php%3Ftitle=Compiling_a_lightweight_Mico32_toolchain.html#column-one">navigation</a>, <a href="index.php%3Ftitle=Compiling_a_lightweight_Mico32_toolchain.html#searchInput">search</a></div> <!-- start content -->
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<p>To build a full toolchain and RTEMS see the page: <a href="index.php%3Ftitle=RTEMS_build_instructions.html" title="RTEMS build instructions">RTEMS_build_instructions</a>.
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</p><p>If you wish to just build a basic tool chain without RTEMS the following directions will suffice:
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</p>
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<ul><li> We must build the tools out of their source trees. We create a "build" directory at the top of the source tree, from which we run the build commands.
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</li><li> To configure binutils: <code>../configure --target=lm32-elf --prefix=/usr/mico32</code>
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</li><li> To configure gcc: <code>../configure --target=lm32-elf --prefix=/usr/mico32 --enable-languages="c"</code>. You may want to add <code>--disable-libgcc --disable-libssp</code>.
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</li></ul>
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<p><br />
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Here's a script download and build a unified GCC source tree on OS X with known compiling versions of the software (OS X does not have GMP, MPC, or MPFR so a unified source tree is the easiest approach):
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</p>
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<pre>#!/bin/sh
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#
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# script to build lm32 GCC toolchain
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#
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TOPDIR=`pwd`
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mkdir $TOPDIR/tarballs
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cd $TOPDIR/tarballs
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curl <a href="ftp://sources.redhat.com/pub/newlib/newlib-1.19.0.tar.gz" class="external free" title="ftp://sources.redhat.com/pub/newlib/newlib-1.19.0.tar.gz" rel="nofollow">ftp://sources.redhat.com/pub/newlib/newlib-1.19.0.tar.gz</a> -o newlib-1.19.0.tar.gz
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curl <a href="http://fileboar.com/gcc/releases/gcc-4.5.3/gcc-4.5.3.tar.bz2" class="external free" title="http://fileboar.com/gcc/releases/gcc-4.5.3/gcc-4.5.3.tar.bz2" rel="nofollow">http://fileboar.com/gcc/releases/gcc-4.5.3/gcc-4.5.3.tar.bz2</a> -o gcc-4.5.3.tar.bz2
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curl <a href="http://ftp.gnu.org/gnu/gdb/gdb-7.2a.tar.bz2" class="external free" title="http://ftp.gnu.org/gnu/gdb/gdb-7.2a.tar.bz2" rel="nofollow">http://ftp.gnu.org/gnu/gdb/gdb-7.2a.tar.bz2</a> -o gdb-7.2a.tar.bz2
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curl <a href="http://ftp.gnu.org/gnu/binutils/binutils-2.21.1.tar.bz2" class="external free" title="http://ftp.gnu.org/gnu/binutils/binutils-2.21.1.tar.bz2" rel="nofollow">http://ftp.gnu.org/gnu/binutils/binutils-2.21.1.tar.bz2</a> -o binutils-2.21.1.tar.bz2
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curl <a href="http://www.multiprecision.org/mpc/download/mpc-0.9.tar.gz" class="external free" title="http://www.multiprecision.org/mpc/download/mpc-0.9.tar.gz" rel="nofollow">http://www.multiprecision.org/mpc/download/mpc-0.9.tar.gz</a> -o mpc-0.9.tar.gz
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curl <a href="http://www.mpfr.org/mpfr-3.0.1/mpfr-3.0.1.tar.bz2" class="external free" title="http://www.mpfr.org/mpfr-3.0.1/mpfr-3.0.1.tar.bz2" rel="nofollow">http://www.mpfr.org/mpfr-3.0.1/mpfr-3.0.1.tar.bz2</a> -o mpfr-3.0.1.tar.bz2
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curl <a href="ftp://ftp.gmplib.org/pub/gmp-5.0.2/gmp-5.0.2.tar.bz2" class="external free" title="ftp://ftp.gmplib.org/pub/gmp-5.0.2/gmp-5.0.2.tar.bz2" rel="nofollow">ftp://ftp.gmplib.org/pub/gmp-5.0.2/gmp-5.0.2.tar.bz2</a> -o gmp-5.0.2.tar.bz2
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mkdir $TOPDIR/src
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cd $TOPDIR/src
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tar xzvf ../tarballs/newlib-1.19.0.tar.gz
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tar xzvf ../tarballs/gdb-7.2a.tar.bz2
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tar xzvf ../tarballs/binutils-2.21.1.tar.bz2
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tar xzvf ../tarballs/mpc-0.9.tar.gz
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tar xzvf ../tarballs/mpfr-3.0.1.tar.bz2
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tar xvzf ../tarballs/gmp-5.0.2.tar.bz2
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tar xvzf ../tarballs/gcc-4.5.3.tar.bz2
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cd $TOPDIR/src/gcc-4.5.3
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rm -rf bfd binutils gas gold gprof opcodes newlib libgloss gdb mpc mpfr gmp
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ln -s ../binutils-2.21.1/bfd bfd
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ln -s ../binutils-2.21.1/binutils binutils
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ln -s ../binutils-2.21.1/gas gas
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ln -s ../binutils-2.21.1/gold gold
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ln -s ../binutils-2.21.1/gprof gprof
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ln -s ../binutils-2.21.1/opcodes opcodes
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ln -s ../binutils-2.21.1/ld ld
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ln -s ../newlib-1.19.0/newlib newlib
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ln -s ../newlib-1.19.0/libgloss libgloss
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ln -s ../gdb-7.2 gdb
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ln -s ../mpc-0.9 mpc
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ln -s ../mpfr-3.0.1 mpfr
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ln -s ../gmp-5.0.2 gmp
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mkdir $TOPDIR/build
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cd $TOPDIR/build
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../src/gcc-4.5.3/configure --prefix=/usr/mico32 --enable-languages=c --target=lm32-elf --disable-libssp --disable-libgcc
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make
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make install
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</pre>
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