# SPDX-FileCopyrightText: 2021 Andrius Štikonas <andrius@stikonas.eu>
# SPDX-FileCopyrightText: 2021 Paul Dersey <pdersey@gmail.com>

# SPDX-License-Identifier: GPL-3.0-or-later

src_prepare() {
    default

    # Needed for musl
    sed -i 's/struct siginfo/siginfo_t/' libgcc/config/i386/linux-unwind.h

    # Regenerating top level Makefile requires GNU Autogen and hence Guile,
    # but it is not essential for building gcc.
    rm configure Makefile.in fixincludes/fixincl.x

    # Regenerate aclocal.m4 files
    # grep "generated automatically by aclocal" */aclocal.m4  -l | sed -e 's#/aclocal.m4##'  | tr "\n" " " | sed -e 's/ $/\n/'
    for dir in intl libcpp libdecnumber; do
        cd $dir
        rm aclocal.m4
        AUTOCONF=autoconf-2.64 AUTOM4TE=autom4te-2.64 aclocal-1.11 --acdir=../config
        cd ..
    done
    cd gcc
    rm aclocal.m4
    AUTOCONF=autoconf-2.64 AUTOM4TE=autom4te-2.64 aclocal-1.11 --acdir=../config #AM_PROG_CC_C_O
    cd ..
    cd fixincludes
    rm aclocal.m4
    AUTOCONF=autoconf-2.64 AUTOM4TE=autom4te-2.64 aclocal-1.11 --acdir=../gcc
    cd ..
    #libjava warning
    for dir in boehm-gc libffi libgfortran libgo libgomp libitm libjava libmudflap libobjc libquadmath libssp libstdc++-v3 lto-plugin zlib; do
        cd $dir
        rm aclocal.m4
        AUTOCONF=autoconf-2.64 AUTOM4TE=autom4te-2.64 aclocal-1.11
        cd ..
    done

    # Regenerate configure scripts
    for dir in $(ls */configure | sed 's#/configure##' | tr "\n" " " | sed -e 's/ $/\n/' -e 's/^boehm-gc //'); do
        cd $dir
        rm configure
        autoconf-2.64 || autoconf-2.64
        cd ..
    done

    # Regenerate Makefile.in
    for dir in $(ls */Makefile.am | sed 's#/Makefile.am##' | tr "\n" " " | sed -e 's/ $/\n/' -e 's/^boehm-gc //'); do
        cd $dir
        rm Makefile.in
        AUTOCONF=autoconf-2.64 AUTOM4TE=autom4te-2.64 automake-1.11
        cd ..
    done

    for dir in libdecnumber libcpp libiberty gcc; do
        cd $dir
        rm -f config.in
        autoheader-2.64
        cd ..
    done

    # Rebuild libtool files
    rm config.guess config.sub ltmain.sh
    libtoolize
    cp "${PREFIX}/"/share/automake-1.9/config.sub .

    # Workaround for bison being too new
    rm intl/plural.c

    # Rebuild flex generated files
    rm gcc/gengtype-lex.c

    # Remove translation catalogs
    find . -name '*.gmo' -delete

    # Pre-built texinfo files
    find . -name '*.info' -delete
}

src_configure() {
    mkdir build
    cd build

    for dir in libiberty libcpp libdecnumber gcc libgcc; do
        mkdir $dir
        cd $dir
        ../../$dir/configure \
            --prefix="${PREFIX}" \
            --libdir="${PREFIX}"/lib/musl \
            --build=i386-unknown-linux-gnu \
            --target=i386-unknown-linux-gnu \
            --host=i386-unknown-linux-gnu \
            --disable-shared \
            --program-transform-name=
        cd ..
    done
    cd ..
}

src_compile() {
    ln -s . build/build-i386-unknown-linux-gnu
    for dir in libiberty libcpp libdecnumber gcc; do
        # We have makeinfo now but it is not happy with gcc .info files, so skip it
        make -C build/$dir LIBGCC2_INCLUDES=-I"${PREFIX}/include" \
	     STMP_FIXINC= GMPLIBS="-lmpc -lmpfr -lgmp" MAKEINFO=true
    done

    # host_subdir is necessary because we have slightly different build directory layout
    make -C build/libgcc PATH="${PATH}:../gcc" CC=../gcc/xgcc \
	 host_subdir=build CFLAGS="-I../gcc/include -I/${PREFIX}/include"
}

src_install() {
    make -C build/gcc install STMP_FIXINC= DESTDIR="${DESTDIR}" MAKEINFO=true
    make -C build/libgcc install DESTDIR="${DESTDIR}" host_subdir=build
}