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"/"$TRIPLE"/usr
  40 fi
  41
  42 # binutils
  43 fetchextract "$BINUTILS_URL"
  44 BINUTILS_DIR=$(stripfileext $(basename $BINUTILS_URL))
  45
  46 sed -i -e 's,MAKEINFO="$MISSING makeinfo",MAKEINFO=true,g' \
  47     $BINUTILS_DIR/configure
  48 buildinstall 1 $BINUTILS_DIR --target=$TRIPLE --disable-werror \
  49     --with-sysroot="$PREFIX"/"$TRIPLE" \
  50     $BINUTILS_CONFFLAGS
  51
  52 # gcc 1
  53 fetchextract http://ftp.gnu.org/gnu/gcc/gcc-$GCC_VERSION/ gcc-$GCC_VERSION .tar.bz2
  54 [ "$GCC_BUILTIN_PREREQS" = "yes" ] && gccprereqs
  55
  56 # gcc 1 is only used to bootstrap musl and gcc 2, so it is pointless to
  57 # optimize it.
  58 # If GCC_STAGE1_NOOPT is set, we build it without optimization and debug info,
  59 # which reduces overall build time considerably.
  60 SAVE_CFLAGS="$CFLAGS"
  61 SAVE_CXXFLAGS="$CXXFLAGS"
  62 if [ -z "$GCC_STAGE1_NOOPT" ]; then GCC_STAGE1_NOOPT=0; fi
  63 if [ "$GCC_STAGE1_NOOPT" -ne 0 ]
  64 then
  65     export CFLAGS="-O0 -g0"
  66     export CXXFLAGS="-O0 -g0"
  67 fi
  68
  69 buildinstall 1 gcc-$GCC_VERSION --target=$TRIPLE \
  70     --with-sysroot="$PREFIX"/"$TRIPLE" \
  71     --enable-languages=c --with-newlib --disable-libssp --disable-nls \
  72     --disable-libquadmath --disable-threads --disable-decimal-float \
  73     --disable-shared --disable-libmudflap --disable-libgomp --disable-libatomic \
  74     $GCC_MULTILIB_CONFFLAGS \
  75     $GCC_BOOTSTRAP_CONFFLAGS
  76
  77 export CFLAGS="$SAVE_CFLAGS"
  78 export CXXFLAGS="$SAVE_CXXFLAGS"
  79
  80 # linux headers
  81 fetchextract $LINUX_HEADERS_URL
  82 LINUX_HEADERS_DIR=$(stripfileext $(basename $LINUX_HEADERS_URL))
  83
  84 if [ ! -e $LINUX_HEADERS_DIR/configured ]
  85 then
  86     (
  87     cd $LINUX_HEADERS_DIR
  88     make $LINUX_DEFCONFIG ARCH=$LINUX_ARCH
  89     touch configured
  90     )
  91 fi
  92 if [ ! -e $LINUX_HEADERS_DIR/installedheaders ]
  93 then
  94     (
  95     cd $LINUX_HEADERS_DIR
  96     make headers_install ARCH=$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-libmudflap \
 121         --disable-libsanitizer --disable-nls \
 122         $GCC_MULTILIB_CONFFLAGS \
 123         $GCC_CONFFLAGS
 124 fi
 125
 126 # un"fix" headers
 127 rm -rf "$CC_PREFIX/lib/gcc/$TRIPLE"/*/include-fixed/ "$CC_PREFIX/lib/gcc/$TRIPLE"/*/include/stddef.h
 128
 129 # make backwards-named compilers for easier cross-compiling
 130 (
 131     cd "$CC_PREFIX/bin"
 132     for tool in $TRIPLE-*
 133     do
 134         btool=`echo "$tool" | sed 's/-linux-musl/-musl-linux/'`
 135         [ "$tool" != "$btool" -a ! -e "$btool" ] && ln -s $tool $btool
 136     done
 137 )
 138
 139 exit 0