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 "$0"`
  21 fi
  22
  23 # Fail on any command failing, show commands:
  24 set -ex
  25
  26 BINUTILS_CONFFLAGS=
  27 GCC_BOOTSTRAP_CONFFLAGS=
  28 MUSL_CONFFLAGS=
  29 GCC_CONFFLAGS=
  30 WITH_SYSROOT=no
  31 . "$MUSL_CC_BASE"/defs.sh
  32
  33 # Switch to the CC prefix for all of this
  34 PREFIX="$CC_PREFIX"
  35
  36 # make the sysroot usr directory
  37 if [ ! -e "$PREFIX"/"$TRIPLE"/usr ]
  38 then
  39     mkdir -p "$PREFIX"/"$TRIPLE"
  40     ln -sf . "$PREFIX"/"$TRIPLE"/usr
  41 fi
  42 if [ "$WITH_SYSROOT" = "yes" ]
  43 then
  44     SYSROOT_FLAGS="--with-sysroot=""$PREFIX"/"$TRIPLE"
  45 fi
  46
  47 # binutils
  48 fetchextract "$BINUTILS_URL"
  49 BINUTILS_DIR=$(stripfileext $(basename $BINUTILS_URL))
  50 if printf "%s" "$BINUTILS_URL" | grep "2\.[2-9][0-9]" >/dev/null 2>&1 ; then
  51     BINUTILS_CONFFLAGS="$BINUTILS_CONFFLAGS --enable-deterministic-archives"
  52 fi
  53
  54 sed -i -e 's,MAKEINFO="$MISSING makeinfo",MAKEINFO=true,g' \
  55     $BINUTILS_DIR/configure
  56 buildinstall 1 $BINUTILS_DIR --target=$TRIPLE --disable-werror $SYSROOT_FLAGS \
  57     $BINUTILS_CONFFLAGS
  58
  59 # gcc 1
  60 if [ -z $GCC_URL ];
  61 then
  62     fetchextract http://ftp.gnu.org/gnu/gcc/gcc-$GCC_VERSION/ gcc-$GCC_VERSION .tar.bz2
  63 else
  64     fetchextract "$GCC_URL"
  65     if [ -e $GCC_EXTRACT_DIR ]; then
  66         mv $GCC_EXTRACT_DIR gcc-$GCC_VERSION
  67     fi
  68 fi
  69
  70 [ "$GCC_BUILTIN_PREREQS" = "yes" ] && gccprereqs
  71
  72 # gcc 1 is only used to bootstrap musl and gcc 2, so it is pointless to
  73 # optimize it.
  74 # If GCC_STAGE1_NOOPT is set, we build it without optimization and debug info,
  75 # which reduces overall build time considerably.
  76 SAVE_CFLAGS="$CFLAGS"
  77 SAVE_CXXFLAGS="$CXXFLAGS"
  78 if [ -z "$GCC_STAGE1_NOOPT" ]; then GCC_STAGE1_NOOPT=0; fi
  79 if [ "$GCC_STAGE1_NOOPT" -ne 0 ]
  80 then
  81     export CFLAGS="-O0 -g0"
  82     export CXXFLAGS="-O0 -g0"
  83 fi
  84
  85 buildinstall 1 gcc-$GCC_VERSION --target=$TRIPLE $SYSROOT_FLAGS \
  86     --enable-languages=c --with-newlib --disable-libssp --disable-nls \
  87     --disable-libquadmath --disable-threads --disable-decimal-float \
  88     --disable-shared --disable-libmudflap --disable-libgomp --disable-libatomic \
  89     $GCC_MULTILIB_CONFFLAGS \
  90     $GCC_BOOTSTRAP_CONFFLAGS
  91
  92 export CFLAGS="$SAVE_CFLAGS"
  93 export CXXFLAGS="$SAVE_CXXFLAGS"
  94
  95 # linux headers
  96 fetchextract $LINUX_HEADERS_URL
  97 LINUX_HEADERS_DIR=$(stripfileext $(basename $LINUX_HEADERS_URL))
  98
  99 if [ ! -e $LINUX_HEADERS_DIR/configured ]
 100 then
 101     (
 102     cd $LINUX_HEADERS_DIR
 103     make $LINUX_DEFCONFIG ARCH=$LINUX_ARCH
 104     touch configured
 105     )
 106 fi
 107 if [ ! -e $LINUX_HEADERS_DIR/installedheaders ]
 108 then
 109     (
 110     cd $LINUX_HEADERS_DIR
 111     make headers_install ARCH=$LINUX_ARCH INSTALL_HDR_PATH="$CC_PREFIX/$TRIPLE"
 112     touch installedheaders
 113     )
 114 fi
 115
 116 if [ "$MUSL_VERSION" != "no" ]
 117 then
 118     # musl in CC prefix
 119     PREFIX="$CC_PREFIX/$TRIPLE"
 120     muslfetchextract
 121     # We set both CROSS_COMPILE and CC because CC in the environment overrides
 122     # and CROSS_COMPILE setting
 123     buildinstall '' musl-$MUSL_VERSION \
 124         --enable-debug --enable-optimize CROSS_COMPILE="$TRIPLE-" CC="$TRIPLE-gcc" $MUSL_CONFFLAGS
 125     unset PREFIX
 126     PREFIX="$CC_PREFIX"
 127
 128     # if it didn't build libc.so, disable dynamic linking
 129     if [ ! -e "$CC_PREFIX/$TRIPLE/lib/libc.so" ]
 130     then
 131         GCC_CONFFLAGS="--disable-shared $GCC_CONFFLAGS"
 132     fi
 133
 134     # gcc 2
 135     buildinstall 2 gcc-$GCC_VERSION --target=$TRIPLE $SYSROOT_FLAGS \
 136         --enable-languages=$LANGUAGES --disable-libmudflap \
 137         --disable-libsanitizer --disable-nls \
 138         $GCC_MULTILIB_CONFFLAGS \
 139         $GCC_CONFFLAGS
 140 fi
 141
 142 # un"fix" headers
 143 rm -rf "$CC_PREFIX/lib/gcc/$TRIPLE"/*/include-fixed/ "$CC_PREFIX/lib/gcc/$TRIPLE"/*/include/stddef.h
 144
 145 # make backwards-named compilers for easier cross-compiling
 146 (
 147     cd "$CC_PREFIX/bin"
 148     for tool in $TRIPLE-*
 149     do
 150         btool=`echo "$tool" | sed 's/-linux-musl/-musl-linux/'`
 151         [ "$tool" != "$btool" -a ! -e "$btool" ] && ln -s $tool $btool
 152     done
 153 )
 154
 155 exit 0