build.sh

#!/bin/sh
# Build a cross-compiler
# 
# Copyright (C) 2012 Gregor Richards
# 
# Permission to use, copy, modify, and/or distribute this software for any
# purpose with or without fee is hereby granted, provided that the above
# copyright notice and this permission notice appear in all copies.
# 
# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
# REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
# AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
# INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
# LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
# OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
# PERFORMANCE OF THIS SOFTWARE.

if [ ! "$MUSL_CC_BASE" ]
then
    MUSL_CC_BASE=`dirname "$0"`
fi

# Fail on any command failing, show commands:
set -ex

BINUTILS_CONFFLAGS=
GCC_BOOTSTRAP_CONFFLAGS=
NEWLIB_CONFFLAGS=
GCC_CONFFLAGS=
WITH_SYSROOT=no
. "$MUSL_CC_BASE"/defs.sh

# Switch to the CC prefix for all of this
PREFIX="$CC_PREFIX"

# make the sysroot usr directory
if [ ! -e "$PREFIX"/"$TRIPLE"/usr ]
then
    mkdir -p "$PREFIX"/"$TRIPLE"
    ln -sf . "$PREFIX"/"$TRIPLE"/usr
fi
if [ "$WITH_SYSROOT" = "yes" ]
then
    SYSROOT_FLAGS="--with-sysroot=""$PREFIX"/"$TRIPLE"
fi

# binutils
fetchextract binutils "$BINUTILS_URL"
BINUTILS_DIR=$(stripfileext $(basename $BINUTILS_URL))
if printf "%s" "$BINUTILS_URL" | grep "2\.[2-9][0-9]" >/dev/null 2>&1 ; then
    BINUTILS_CONFFLAGS="$BINUTILS_CONFFLAGS --enable-deterministic-archives"
fi

sed -i -e 's,MAKEINFO="$MISSING makeinfo",MAKEINFO=true,g' \
    $BINUTILS_DIR/configure
buildinstall 1 $BINUTILS_DIR --target=$TRIPLE --disable-werror $SYSROOT_FLAGS \
    $BINUTILS_CONFFLAGS

# gcc 1
if [ -z $GCC_URL ];
then
    gcc_ext=bz2
    if test $(printf "%s\n" "$GCC_VERSION" | sed 's/\.//g') -gt 540 ; then
      gcc_ext=xz
    fi
    fetchextract gcc http://ftp.gnu.org/gnu/gcc/gcc-$GCC_VERSION/ gcc-$GCC_VERSION .tar.${gcc_ext}
else
    fetchextract gcc "$GCC_URL"
    if [ -e $GCC_EXTRACT_DIR ]; then
	mv $GCC_EXTRACT_DIR gcc-$GCC_VERSION
    fi
fi

[ "$GCC_BUILTIN_PREREQS" = "yes" ] && gccprereqs

# If GCC_STAGE1_NOOPT is set, we build gcc without optimization and debug info,
# which reduces overall build time considerably.
SAVE_CFLAGS="$CFLAGS"
SAVE_CXXFLAGS="$CXXFLAGS"
if [ -z "$GCC_STAGE1_NOOPT" ]; then GCC_STAGE1_NOOPT=0; fi
if [ "$GCC_STAGE1_NOOPT" -ne 0 ]
then
    export CFLAGS="-O0 -g0"
    export CXXFLAGS="-O0 -g0"
fi

buildinstall 1 gcc-$GCC_VERSION --target=$TRIPLE $SYSROOT_FLAGS \
    --enable-languages=c --with-newlib --disable-libssp --disable-nls \
    --disable-libquadmath --disable-threads --disable-decimal-float \
    --disable-shared --disable-libmudflap --disable-libgomp --disable-libatomic \
    $GCC_MULTILIB_CONFFLAGS \
    $GCC_BOOTSTRAP_CONFFLAGS

export CFLAGS="$SAVE_CFLAGS"
export CXXFLAGS="$SAVE_CXXFLAGS"

if [ "$NEWLIB_VERSION" != "no" ]
then
    PREFIX="$CC_PREFIX"
    newlibfetchextract
    NEWLIB_DIR=newlib-$NEWLIB_VERSION
    sed -i -e 's,MAKEINFO="$MISSING makeinfo",MAKEINFO=true,g' \
       $NEWLIB_DIR/configure

    # We set both CROSS_COMPILE and CC because CC in the environment overrides
    # and CROSS_COMPILE setting
    buildinstall '' newlib-$NEWLIB_VERSION \
        --target=$TRIPLE CROSS_COMPILE=${TRIPLE}- CC_FOR_TARGET=$TRIPLE-gcc $NEWLIB_CONFFLAGS

    # if it didn't build libc.so, disable dynamic linking
    if [ ! -e "$CC_PREFIX/$TRIPLE/lib/libc.so" ]
    then
        GCC_CONFFLAGS="--disable-shared $GCC_CONFFLAGS"
    fi

    # gcc 2
    buildinstall 2 gcc-$GCC_VERSION --target=$TRIPLE $SYSROOT_FLAGS \
        --enable-languages=$LANGUAGES --disable-libmudflap \
        --disable-libsanitizer --disable-nls \
        --disable-libssp \
        --with-newlib \
        $GCC_MULTILIB_CONFFLAGS \
        $GCC_CONFFLAGS
fi

echo "looks as if it worked o.0"

test -z "$ENABLE_POST_BUILD_HOOK" || post_build_hook
exit 0