#!/bin/bash
#  Copyright (C) 2009, 2010  Matías A. Fonzo, <selk@dragora.org>
#
#  This program is free software: you can redistribute it and/or modify
#  it under the terms of the GNU General Public License as published by
#  the Free Software Foundation, either version 3 of the License, or
#  (at your option) any later version.
#
#  This program is distributed in the hope that it will be useful,
#  but WITHOUT ANY WARRANTY; without even the implied warranty of
#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#  GNU General Public License for more details.
#
#  You should have received a copy of the GNU General Public License
#  along with this program.  If not, see <http://www.gnu.org/licenses/>.

set -e

CWD=$(pwd)

TMP=${TMP:-/tmp/sources-gcc}-$(mcookie)
OUT=${OUT:-/tmp/packages}

V=4.5.1
ARCH=${ARCH:-i486}
B=2

# Flags for the compiler:
DCFLAGS=${DCFLAGS:=-O2 -march=i486 -mtune=i686}

# Parallel jobs for the compiler:
JOBS=${JOBS:=-j4}

# System type:
TYPE=${ARCH}-dragora-linux-gnu

PKG=${TMP}/package-gcc
PKG2=${TMP}/package-gcc_libs

rm -rf $PKG $PKG2
mkdir -p $PKG $PKG2 $OUT

echo "Uncompressing the tarball..."
( cd $TMP
  rm -rf gcc-${V}
  lzip -cd ${CWD}/gcc-${V}.tar.lz | tar -xvf -
)

cd ${TMP}/gcc-${V}

# Set sane ownerships and permissions:
chown -R 0:0 .
find . \
 \( -perm 2777 -o \
    -perm 777  -o \
    -perm 775  -o \
    -perm 711  -o \
    -perm 555  -o \
    -perm 511     \
 \) -exec chmod 755 {} + \
  -o \
 \( -perm 666 -o \
    -perm 664 -o \
    -perm 600 -o \
    -perm 444 -o \
    -perm 440 -o \
    -perm 400    \
 \) -exec chmod 644 {} +

# These sed lines are courtesy from LFS...
#
# Don't install libiberty.
#
# The version of libiberty is provided by binutils:
sed -i 's/install_to_$(INSTALL_DEST) //' libiberty/Makefile.in

# Don't execute the script "fixincludes" to fix some headers:
sed -i 's@\./fixinc\.sh@-c true@' gcc/Makefile.in

# Fix up the version of the PPL:
sed -i '/ppl_minor_version=/s%10%11%' configure

# Include ECJ:
cat ${CWD}/ecj-4.3.jar > ecj.jar

# Determines the short version of Python:
PYVER=$(python -c 'import sys; print sys.version[:3]')

export CFLAGS="$DCFLAGS"
export CXXFLAGS="$DCFLAGS"

# GCC needs a separate build directory:
rm -rf ../gcc-build
mkdir ../gcc-build
cd ../gcc-build

../gcc-${V}/configure \
 --prefix=/usr \
 --bindir=/bin \
 --libdir=/usr/lib \
 --libexecdir=/usr/lib \
 --mandir=/usr/man \
 --infodir=/usr/info \
 --enable-shared \
 --enable-threads=posix \
 --enable-__cxa_atexit \
 --enable-clocale=gnu \
 --enable-gnu-unique-object \
 --enable-bootstrap \
 --enable-libgcj \
 --enable-interpreter \
 --enable-lto \
 --enable-libssp \
 --enable-languages=c,ada,c++,fortran,java,objc,obj-c++ \
 --enable-checking=release \
 --disable-libstdcxx-pch \
 --with-python-dir=/lib/python${PYVER}/site-packages \
 --with-system-zlib \
 --with-libelf \
 --with-ppl \
 --with-cloog \
 --build=$TYPE \
 --target=$TYPE

make $JOBS

if [[ -n $CHECK ]]; then
  make check;
fi

make install DESTDIR=$PKG

# Add "specs" file to GCC:
mkdir -p ${PKG}/usr/lib/gcc/${TYPE}/${V}
cat gcc/specs > ${PKG}/usr/lib/gcc/${TYPE}/${V}/specs

# Fix permissions of the GCC library:
chmod 755 ${PKG}/usr/lib/libgcc_s.so.1

# Strip commentaries and notes:
( cd $PKG
  find . -type f | xargs file | awk '/ELF/ && /executable/ || /shared object/' | \
   cut -f 1 -d : | xargs strip --remove-section=.comment --remove-section=.note 2> /dev/null
)
# Small size for the binaries:
strip --strip-unneeded ${PKG}/bin/* 2> /dev/null || true;

# Creates symlinks (compatibility) for GCC:
( cd ${PKG}/bin
  mv gcc gcc-${V}
  ln -sf gcc-${V} gcc
  ln -sf gcc cc
  ln -sf gcc gnatgcc
  ln -sf gcc-${V} ${TYPE}-gcc
  ln -sf gcc-${V} ${TYPE}-gcc-${V}
  mv g++ g++-gcc-${V}
  ln -sf g++-gcc-${V} g++
  ln -sf g++ c++
  ln -sf g++-gcc-${V} ${TYPE}-g++
  ln -sf g++-gcc-${V} ${TYPE}-c++
  mkdir -p ${PKG}/lib
  ( cd ${PKG}/lib
    ln -sf /bin/cpp .
    ln -sf /usr/lib/gcc .
  )
  mv gfortran gfortran-gcc-${V}
  ln -sf gfortran-gcc-${V} gfortran
  ln -sf gfortran-gcc-${V} ${TYPE}-gfortran
  ln -sf gfortran-gcc-${V} ${TYPE}-gfortran-${V}
  ln -sf gfortran-gcc-${V} ${TYPE}-g77
  ln -sf gfortran g77
  ln -sf g77 f77
  ln -sf gfortran-gcc-${V} ${TYPE}-g95
  ln -sf gfortran g95
  ln -sf g95 f95
  ln -sf gcj ${TYPE}-gcj
  ln -sf gcjh ${TYPE}-gcjh
)

if [[ -f ${PKG}/usr/lib/gcc/${TYPE}/${V}/include/ffitarget.h ]]; then
  ( cd ${PKG}/usr/include
    ln -sf /usr/lib/gcc/${TYPE}/${V}/include/ffitarget.h .
  )
fi

# Remove temporary directory reference in .la files:
find $PKG -type f -name '*.la' | \
 xargs sed -i 's|-L.*/gcc-[[:graph:]]* ||g'

# Move this to the right location:
if ls ${PKG}/usr/lib/libstdc++.so.*.py ; then
  mkdir -p ${PKG}/usr/share/gcc-${V}/python
  ( cd ${PKG}/usr/lib
    for file in libstdc++.so.*.py ; do
      mv $file ${PKG}/usr/share/gcc-${V}/python
    done
  ) 
fi

# Compress GNU info documents:
( cd ${PKG}/usr/info
  rm -f dir
  gzip -9N *
)

# Compress man-pages:
( cd ${PKG}/usr/man
  find . -type f -name '*.?' -exec gzip -9N '{}' +
)
# Link man-pages:
( cd ${PKG}/usr/man/man1
  ln -sf gcc.1.gz cc.1.gz
  ln -sf g++.1.gz c++.1.gz
)

# Back to the source:
cd -

# Copy general documentation:
mkdir -p ${PKG}/usr/doc/gcc-${V}
cp -a \
 ABOUT-NLS COPYING* ChangeLog* README* \
 ${PKG}/usr/doc/gcc-${V}

# Copy Ada (GNAT) documentation:
mkdir -p ${PKG}/usr/doc/gcc-${V}/{ada,libada}
cp -a gcc/ada/ChangeLog ${PKG}/usr/doc/gcc-${V}/ada
cp -a libada/ChangeLog ${PKG}/usr/doc/gcc-${V}/libada

# Copy C documentation:
mkdir -p ${PKG}/usr/doc/gcc-${V}/{gcc,libgomp,libmudflap,libssp}
( cd gcc
  cp -a \
   ABOUT-GCC-NLS COPYING* ChangeLog LANGUAGES ONEWS README* \
   ${PKG}/usr/doc/gcc-${V}/gcc
)
cp -a libgomp/ChangeLog ${PKG}/usr/doc/gcc-${V}/libgomp
cp -a libmudflap/ChangeLog ${PKG}/usr/doc/gcc-${V}/libmudflap
cp -a libssp/ChangeLog ${PKG}/usr/doc/gcc-${V}/libssp

# Copy C++ documentation:
mkdir -p ${PKG}/usr/doc/gcc-${V}/libstdc++-v3
cp -a \
 libstdc++-v3/{ChangeLog,README} \
 ${PKG}/usr/doc/gcc-${V}/libstdc++-v3

# Copy Fortran documentation:
mkdir -p ${PKG}/usr/doc/gcc-${V}/{fortran,libgfortran}
cp -a gcc/fortran/ChangeLog ${PKG}/usr/doc/gcc-${V}/fortran
cp -a libgfortran/ChangeLog ${PKG}/usr/doc/gcc-${V}/libgfortran

# Copy java (GCJ) documentation:
mkdir -p ${PKG}/usr/doc/gcc-${V}/{java,libffi,libjava}
cp -a gcc/java/ChangeLog ${PKG}/usr/doc/gcc-${V}/java
( cd libffi
  cp -a \
   ChangeLog ChangeLog.libgcj LICENSE README \
   ${PKG}/usr/doc/gcc-${V}/libffi
)
( cd libjava
  cp -a \
   COPYING ChangeLog HACKING LIBGCJ_LICENSE NEWS README THANKS \
   ${PKG}/usr/doc/gcc-${V}/libjava
)

# Copy Objc documentation:
mkdir -p ${PKG}/usr/doc/gcc-${V}/{objc,libobjc}
cp -a gcc/objc/{ChangeLog,README} ${PKG}/usr/doc/gcc-${V}/objc
cp -a \
 libobjc/{ChangeLog,README,README.threads,THREADS,THREADS.MACH} \
 ${PKG}/usr/doc/gcc-${V}/libobjc

# Copy Objcp documentation:
mkdir -p ${PKG}/usr/doc/gcc-${V}/objcp
cp -a gcc/objcp/ChangeLog ${PKG}/usr/doc/gcc-${V}/objcp

# Make the GCC shared libraries package;
mkdir -p ${PKG2}/description
cp ${CWD}/description-gcc_libs/* ${PKG2}/description

mkdir -p ${PKG2}/usr/lib
( cd ${PKG}/usr/lib
  cp -a libgcc_s.so* libstdc++.so* ${PKG2}/usr/lib
)
( cd $PKG2
  makepkg -l ${OUT}/gcc_libs-${V}-${ARCH}-${B}.tlz
)

# Main GCC package:

# Copy the description files:
mkdir -p ${PKG}/description
cp ${CWD}/description/* ${PKG}/description

cd $PKG
makepkg -l ${OUT}/gcc-${V}-${ARCH}-${B}.tlz