name=gcc
version=5.2.0
gmp_shortver=6.0.0
gmp_version=${gmp_shortver}a
mpfr_version=3.1.3
mpc_version=1.0.3

dlextract "https://ftp.gnu.org/gnu/$name/$name-$version/$name-$version.tar.bz2" \
          "a51bcfeb3da7dd4c623e27207ed43467"
download "https://ftp.gnu.org/gnu/gmp/gmp-$gmp_version.tar.xz" \
         "1e6da4e434553d2811437aa42c7f7c76"
download "https://ftp.gnu.org/gnu/mpfr/mpfr-$mpfr_version.tar.xz" \
         "6969398cd2fbc56a6af570b5273c56a9"
download "https://ftp.gnu.org/gnu/mpc/mpc-$mpc_version.tar.gz" \
         "d6a1d5f8ddea3abd2cc3e98f58352d26"
header_end

cd "$name-$version"

extract "gmp-$gmp_version.tar.xz"
extract "mpfr-$mpfr_version.tar.xz"
extract "mpc-$mpc_version.tar.gz"
mv "gmp-$gmp_shortver" gmp
mv "mpfr-$mpfr_version" mpfr
mv "mpc-$mpc_version" mpc

cat gcc/limitx.h gcc/glimits.h gcc/limity.h > \
  "$(dirname "$($target-gcc -print-libgcc-file-name)")/include-fixed/limits.h"

for file in \
    $(find gcc/config -name linux64.h -o -name linux.h -o -name sysv4.h)
do
    cp -u $file $file.orig
    sed -e 's@/lib\(64\)\?\(32\)\?/ld@/tools&@g' \
        -e 's@/usr@/tools@g' $file.orig > $file
    echo '
#undef STANDARD_STARTFILE_PREFIX_1
#undef STANDARD_STARTFILE_PREFIX_2
#define STANDARD_STARTFILE_PREFIX_1 "/tools/lib/"
#define STANDARD_STARTFILE_PREFIX_2 ""' >> $file
    touch $file.orig
done

mkdir "../$name-build"; cd "../$name-build"

CC="$target-gcc" \
CXX="$target-g++" \
AR="$target-ar" \
RANLIB="$target-ranlib" \
"../$name-$version/configure" \
    --prefix=/tools \
    --with-local-prefix=/tools \
    --with-native-system-header-dir=/tools/include \
    --enable-languages=c,c++ \
    --disable-libstdcxx-pch \
    --disable-multilib \
    --disable-bootstrap \
    --disable-libgomp

make; make DESTDIR="$dir_install" install
ln -s gcc "$dir_install/tools/bin/cc"

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