#!/bin/sh

# Slackware build script for arm-gcc

# Copyright 2017 Fernando Lopez Jr. <fernando.lopezjr@gmail.com>
# All rights reserved.
#
# Redistribution and use of this script, with or without modification, is
# permitted provided that the following conditions are met:
#
# 1. Redistributions of this script must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
#
#  THIS SOFTWARE IS PROVIDED BY THE AUTHOR "AS IS" AND ANY EXPRESS OR IMPLIED
#  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
#  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO
#  EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
#  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
#  PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
#  OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
#  WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
#  OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
#  ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

# Written by Marek Buras <cyfr0n (at) go2 !dot pl>

PRGNAM=arm-gcc
VERSION=${VERSION:-4.9.2}
BUILD=${BUILD:-1}
TAG=${TAG:-_SBo}

if [ -z "$ARCH" ]; then
  case "$( uname -m )" in
    i?86) ARCH=i586 ;;
    arm*) ARCH=arm ;;
       *) ARCH=$( uname -m ) ;;
  esac
fi

CWD=$(pwd)
TMP=${TMP:-/tmp/SBo}
PKG=$TMP/package-$PRGNAM
OUTPUT=${OUTPUT:-/tmp}

if [ "$ARCH" = "i586" ]; then
  SLKCFLAGS="-O2 -march=i586 -mtune=i686"
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "i686" ]; then
  SLKCFLAGS="-O2 -march=i686 -mtune=i686"
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "x86_64" ]; then
  SLKCFLAGS="-O2 -fPIC"
  LIBDIRSUFFIX="64"
else
  SLKCFLAGS="-O2"
  LIBDIRSUFFIX=""
fi

set -e

rm -rf $PKG
mkdir -p $TMP $PKG $OUTPUT
cd $TMP
rm -rf gcc-$VERSION arm-gcc-build-$VERSION
tar xvf $CWD/gcc-$VERSION.tar.bz2
mkdir arm-gcc-build-$VERSION
cd arm-gcc-build-$VERSION
chown -R root:root .
find -L . \
 \( -perm 777 -o -perm 775 -o -perm 750 -o -perm 711 -o -perm 555 \
  -o -perm 511 \) -exec chmod 755 {} \; -o \
 \( -perm 666 -o -perm 664 -o -perm 640 -o -perm 600 -o -perm 444 \
  -o -perm 440 -o -perm 400 \) -exec chmod 644 {} \;

CFLAGS_FOR_BUILD="$SLKCFLAGS" \
CXXFLAGS_FOR_BUILD="$SLKCFLAGS" \
../gcc-$VERSION/configure \
  --prefix=/usr \
  --libdir=/usr/lib${LIBDIRSUFFIX} \
  --sysconfdir=/etc \
  --localstatedir=/var \
  --infodir=/usr/info \
  --mandir=/usr/man \
  --disable-install-libiberty \
  --disable-libssp \
  --disable-libstdcxx-pch \
  --disable-libunwind-exceptions \
  --disable-linker-build-id \
  --disable-nls \
  --disable-werror \
  --enable-__cxa_atexit \
  --enable-checking=release \
  --enable-clocale=gnu \
  --enable-cloog-backend=isl \
  --enable-gnu-unique-object \
  --enable-gold \
  --enable-ld=default \
  --enable-lto \
  --enable-plugin \
 --target=arm-none-eabi \
 --with-cpu=cortex-m3 \
 --with-fpu=fpv4-sp-d16 \
 --with-float=hard \
 --with-mode=thumb \
 --enable-interwork \
 --enable-multilib \
 --with-system-zlib \
 --without-headers \
 --disable-shared \
 --disable-nls \
 --with-as=/usr/bin/arm-none-eabi-as \
 --with-gnu-as \
 --with-gnu-ld \
 --with-ld=/usr/bin/arm-none-eabi-ld \
  --program-prefix="arm-none-eabi-" \
  --program-suffix="" \
  --build=$ARCH-slackware-linux \
  --enable-languages="c" \
  --with-newlib \
  --with-headers=/usr/include/newlib/libc/include

make
make install DESTDIR=$PKG

# Remove useless stuff
rm -rf $PKG/usr/lib${LIBDIRSUFFIX}/libiberty.a
rm -rf $PKG/usr/info
rm -rf $PKG/usr/include
rm -rf $PKG/usr/share
rm -rf $PKG/usr/man/man7
rm -rf $PKG/usr/libexec/gcc/arm/$VERSION/install-tools

find $PKG -print0 | xargs -0 file | grep -e "executable" -e "shared object" | grep ELF \
  | cut -f 1 -d : | xargs strip --strip-unneeded 2> /dev/null || true

find $PKG/usr/man -type f -exec gzip -9 {} \;
for i in $( find $PKG/usr/man -type l ) ; do ln -s $( readlink $i ).gz $i.gz ; rm $i ; done

mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION
for file in COPYING* ChangeLog MAINTAINERS NEWS README*; do
  cp ../gcc-$VERSION/$file $PKG/usr/doc/$PRGNAM-$VERSION
done
cat $CWD/$PRGNAM.SlackBuild > $PKG/usr/doc/$PRGNAM-$VERSION/$PRGNAM.SlackBuild

mkdir -p $PKG/install
cat $CWD/slack-desc > $PKG/install/slack-desc

cd $PKG
/sbin/makepkg -l y -c n $OUTPUT/$PRGNAM-$VERSION-$ARCH-$BUILD$TAG.${PKGTYPE:-tgz}