build.sh

   1 #!/bin/sh
   2 # Build a cross-compiler
   3 #
   4 # Copyright (C) 2012 Gregor Richards
   5 #
   6 # Permission to use, copy, modify, and/or distribute this software for any
   7 # purpose with or without fee is hereby granted, provided that the above
   8 # copyright notice and this permission notice appear in all copies.
   9 #
  10 # THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
  11 # REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
  12 # AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
  13 # INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
  14 # LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
  15 # OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
  16 # PERFORMANCE OF THIS SOFTWARE.
  17
  18 if [ ! "$MUSL_CC_BASE" ]
  19 then
  20     MUSL_CC_BASE=`dirname "$0"`
  21 fi
  22
  23 # Fail on any command failing, show commands:
  24 set -ex
  25
  26 BINUTILS_CONFFLAGS=
  27 GCC_BOOTSTRAP_CONFFLAGS=
  28 MUSL_CONFFLAGS=
  29 GCC_CONFFLAGS=
  30 . "$MUSL_CC_BASE"/defs.sh
  31
  32 # Switch to the CC prefix for all of this
  33 PREFIX="$CC_PREFIX"
  34
  35 # make the sysroot usr directory
  36 if [ ! -e "$PREFIX"/"$TRIPLE"/usr ]
  37 then
  38     mkdir -p "$PREFIX"/"$TRIPLE"
  39     ln -sf . "$PREFIX"/"$TRIPLE"/usr
  40 fi
  41
  42 # binutils
  43 if [ "$BINUTILS_VERSION" = "2.17" ]
  44 then
  45     # The version of the latest GPLv2 binutils on gnu.org is a lie...
  46     fetchextract http://landley.net/aboriginal/mirror/ binutils-$BINUTILS_VERSION .tar.bz2
  47 else
  48     fetchextract http://ftp.gnu.org/gnu/binutils/ binutils-$BINUTILS_VERSION .tar.bz2
  49 fi
  50
  51 sed -i 's,MAKEINFO="$MISSING makeinfo",MAKEINFO=true,g' \
  52     binutils-$BINUTILS_VERSION/configure
  53 buildinstall 1 binutils-$BINUTILS_VERSION --target=$TRIPLE --disable-werror \
  54     --with-sysroot="$PREFIX"/"$TRIPLE" \
  55     $BINUTILS_CONFFLAGS
  56
  57 # gcc 1
  58 fetchextract http://ftp.gnu.org/gnu/gcc/gcc-$GCC_VERSION/ gcc-$GCC_VERSION .tar.bz2
  59 [ "$GCC_BUILTIN_PREREQS" = "yes" ] && gccprereqs
  60
  61 # gcc 1 is only used to bootstrap musl and gcc 2, so it is pointless to
  62 # optimize it.
  63 # If GCC_STAGE1_NOOPT is set, we build it without optimization and debug info,
  64 # which reduces overall build time considerably.
  65 SAVE_CFLAGS="$CFLAGS"
  66 SAVE_CXXFLAGS="$CXXFLAGS"
  67 if [ -n "$GCC_STAGE1_NOOPT" ] ; then
  68 export CFLAGS="-O0 -g0"
  69 export CXXFLAGS="-O0 -g0"
  70 fi
  71
  72 buildinstall 1 gcc-$GCC_VERSION --target=$TRIPLE \
  73     --with-sysroot="$PREFIX"/"$TRIPLE" \
  74     --enable-languages=c --with-newlib --disable-multilib --disable-libssp \
  75     --disable-libquadmath --disable-threads --disable-decimal-float \
  76     --disable-shared --disable-libmudflap --disable-libgomp --disable-libatomic \
  77     $GCC_BOOTSTRAP_CONFFLAGS
  78
  79 export CFLAGS="$SAVE_CFLAGS"
  80 export CXXFLAGS="$SAVE_CXXFLAGS"
  81
  82 # linux headers
  83 fetchextract http://www.kernel.org/pub/linux/kernel/v3.0/ linux-$LINUX_HEADERS_VERSION .tar.xz
  84 if [ ! -e linux-$LINUX_HEADERS_VERSION/configured ]
  85 then
  86     (
  87     cd linux-$LINUX_HEADERS_VERSION
  88     make $LINUX_DEFCONFIG ARCH=$LINUX_ARCH
  89     touch configured
  90     )
  91 fi
  92 if [ ! -e linux-$LINUX_HEADERS_VERSION/installedheaders ]
  93 then
  94     (
  95     cd linux-$LINUX_HEADERS_VERSION
  96     make headers_install ARCH=$LINUX_ARCH INSTALL_HDR_PATH="$CC_PREFIX/$TRIPLE"
  97     touch installedheaders
  98     )
  99 fi
 100
 101 if [ "$MUSL_VERSION" != "no" ]
 102 then
 103     # musl in CC prefix
 104     PREFIX="$CC_PREFIX/$TRIPLE"
 105     muslfetchextract
 106     buildinstall '' musl-$MUSL_VERSION \
 107         --enable-debug CC="$TRIPLE-gcc" $MUSL_CONFFLAGS
 108     unset PREFIX
 109     PREFIX="$CC_PREFIX"
 110
 111     # if it didn't build libc.so, disable dynamic linking
 112     if [ ! -e "$CC_PREFIX/$TRIPLE/lib/libc.so" ]
 113     then
 114         GCC_CONFFLAGS="--disable-shared $GCC_CONFFLAGS"
 115     fi
 116
 117     # gcc 2
 118     buildinstall 2 gcc-$GCC_VERSION --target=$TRIPLE \
 119         --with-sysroot="$PREFIX"/"$TRIPLE" \
 120         --enable-languages=$LANGUAGES --disable-multilib --disable-libmudflap \
 121         --disable-libsanitizer \
 122         $GCC_CONFFLAGS
 123 fi
 124
 125 # un"fix" headers
 126 rm -rf "$CC_PREFIX/lib/gcc/$TRIPLE"/*/include-fixed/ "$CC_PREFIX/lib/gcc/$TRIPLE"/*/include/stddef.h
 127
 128 # make backwards-named compilers for easier cross-compiling
 129 (
 130     cd "$CC_PREFIX/bin"
 131     for tool in $TRIPLE-*
 132     do
 133         btool=`echo "$tool" | sed 's/-linux-musl/-musl-linux/'`
 134         [ "$tool" != "$btool" -a ! -e "$btool" ] && ln -s $tool $btool
 135     done
 136 )