#!/bin/sh

MAKEDEPS="grep make dejagnu inetutils flex"
DEPS="musl binutils mpc mpfr gmp"

PKG_VER=11.2.0
SOURCE=https://ftp.gnu.org/gnu/gcc/gcc-$PKG_VER/gcc-$PKG_VER.tar.xz

ISL_VER=0.24
PATCH_SRC="https://raw.githubusercontent.com/dslm4515/Musl-LFS/master/patches/gcc-alpine"

ADDITIONAL="
    https://libisl.sourceforge.io/isl-$ISL_VER.tar.xz

    $PATCH_SRC/0001-posix_memalign.patch 
    $PATCH_SRC/0003-Turn-on-Wl-z-relro-z-now-by-default.patch 
    $PATCH_SRC/0004-Turn-on-D_FORTIFY_SOURCE-2-by-default-for-C-C-ObjC-O.patch 
    $PATCH_SRC/0006-Enable-Wformat-and-Wformat-security-by-default.patch 
    $PATCH_SRC/0007-Enable-Wtrampolines-by-default.patch 
    $PATCH_SRC/0009-Ensure-that-msgfmt-doesn-t-encounter-problems-during.patch 
    $PATCH_SRC/0010-Don-t-declare-asprintf-if-defined-as-a-macro.patch 
    $PATCH_SRC/0012-libitm-disable-FORTIFY.patch 
    $PATCH_SRC/0013-libgcc_s.patch 
    $PATCH_SRC/0015-libffi-use-__linux__-instead-of-__gnu_linux__-for-mu.patch 
    $PATCH_SRC/0016-dlang-update-zlib-binding.patch 
    $PATCH_SRC/0017-dlang-fix-fcntl-on-mips-add-libucontext-dep.patch 
    $PATCH_SRC/0018-ada-fix-shared-linking.patch 
    $PATCH_SRC/0019-build-fix-CXXFLAGS_FOR_BUILD-passing.patch 
    $PATCH_SRC/0020-add-fortify-headers-paths.patch 
    $PATCH_SRC/0023-Pure-64-bit-MIPS.patch 
    $PATCH_SRC/0024-use-pure-64-bit-configuration-where-appropriate.patch 
    $PATCH_SRC/0025-always-build-libgcc_eh.a.patch 
    $PATCH_SRC/0027-ada-musl-support-fixes.patch 
    $PATCH_SRC/0028-gcc-go-Use-_off_t-type-instead-of-_loff_t.patch 
    $PATCH_SRC/0029-gcc-go-Don-t-include-sys-user.h.patch 
    $PATCH_SRC/0030-gcc-go-Fix-ucontext_t-on-PPC64.patch 
    $PATCH_SRC/0031-gcc-go-Fix-handling-of-signal-34-on-musl.patch 
    $PATCH_SRC/0032-gcc-go-Use-int64-type-as-offset-argument-for-mmap.patch 
    $PATCH_SRC/0035-gcc-go-Prefer-_off_t-over-_off64_t.patch 
    $PATCH_SRC/0036-gcc-go-undef-SETCONTEXT_CLOBBERS_TLS-in-proc.c.patch 
    $PATCH_SRC/0037-gcc-go-link-to-libucontext.patch 
    $PATCH_SRC/0038-gcc-go-Disable-printing-of-unaccessible-ppc64-struct.patch 
    $PATCH_SRC/0041-Use-generic-errstr.go-implementation-on-musl.patch 
    $PATCH_SRC/0042-Disable-ssp-on-nostdlib-nodefaultlibs-and-ffreestand.patch 
    $PATCH_SRC/0043-configure-Add-enable-autolink-libatomic-use-in-LINK_.patch 
    $PATCH_SRC/0021-Alpine-musl-package-provides-libssp_nonshared.a.-We-.patch


    https://raw.githubusercontent.com/dslm4515/Musl-LFS/master/files/musl/getconf.1
    https://raw.githubusercontent.com/dslm4515/Musl-LFS/master/files/musl/getconf.c
    https://raw.githubusercontent.com/dslm4515/Musl-LFS/master/files/musl/getent.1
    https://raw.githubusercontent.com/dslm4515/Musl-LFS/master/files/musl/getent.c
    https://raw.githubusercontent.com/dslm4515/Musl-LFS/master/files/musl/iconv.c
"

DESC="The GNU Compiler Collection - C and C++ frontends"

prepare () {
    case $(uname -m) in
      x86_64) export TRUPLE="x86_64-linux-musl"
              export EXTRA_CONFIG=" --with-arch=x86-64"
              ;;
      i686)   export TRUPLE="i686-linux-musl"
              export EXTRA_CONFIG=" --with-arch=pentium3 --with-tune=pentium-m"
              ;;
      armv7l) export TRUPLE="armv7l-linux-musleabihf"
              export EXTRA_CONFIG=" --with-arch=armv7-a --with-tune=generic-armv7-a --with-fpu=vfpv3-d16 --with-float=hard --with-abi=aapcs-linux --with-mode=thumb"
              ;;
      armv6l) export TRUPLE="armv6l-linux-musleabihf"
              export EXTRA_CONFIG=" --with-arch=armv6zk --with-tune=arm1176jzf-s --with-fpu=vfp --with-float=hard --with-abi=aapcs-linux"
              ;;
      aarch64) export TRUPLE="aarch64-linux-musleabihf"
               export EXTRA_CONFIG=" --with-arch=armv8-a --with-abi=lp64 --enable-fix-cortex-a53-835769 --enable-fix-cortex-a53-843419"
               sed -i '/m64=/s/lib64/lib/' gcc/config/aarch64/t-aarch64-linux
              ;;
    esac 

    tar xf isl-$ISL_VER.tar.xz
    mv isl-$ISL_VER isl
    
    apply_patches
}

build () {
    mkdir build
    cd build

    export  NOFF="--disable-libstdcxx-pch "
    export NOFF+="--disable-nls "
    export NOFF+="--disable-multilib "
    export NOFF+="--disable-bootstrap "
    export NOFF+="--disable-symvers "
    export NOFF+="--disable-libsanitizer "
    export NOFF+="--disable-libssp "
    export NOFF+="--disable-libmpx "
    export NOFF+="--disable-libmudflap "
    export NOFF+="--disable-fixed-point "
    export NOFF+="--disable-sjlj-exceptions "
    export NOFF+="--disable-werror "

    # Enable graphite
    export XCONFIG="--with-ppl=yes --with-cloog=yes "

    # Enable features for x86_64
    export XTRA86="--with-arch=x86-64 "

    # Enable features
    export  FON="--enable-threads=posix "
    export FON+="--enable-clocale=generic "
    export FON+="--enable-tls "
    export FON+="--enable-libstdcxx-time "
    export FON+="--enable-fully-dynamic-string "
    export FON+="--enable-default-ssp "
    export FON+="--enable-linker-build-id "
    export FON+="--enable-checking=release "
    export FON+="--enable-cloog-backend "
    export FON+="--enable-__cxa_atexit "
    export FON+="--enable-lto "
    export FON+="--enable-plugins "
    export FON+="--with-system-zlib "
    export FON+="--with-linker-hash-style=gnu "
    #export FON+="--with-isl "

    # Configure source
    SED=sed  libat_cv_have_ifunc=no  \
    ../configure --prefix=/usr            \
                 --target=${TRUPLE}          \
                 --enable-languages=c,c++,lto \
                 $NOFF $XTRA86 $XCONFIG $FON &&

    make &&

    cd .. &&
    cc getent.c -o getent &&
    cc getconf.c -o getconf &&
    cc iconv.c -o iconv 
}

check () {
    cd build
    if id -u tester; then
        chown -R tester .
        su tester -c "PATH=$PATH make $MAKEFLAGS -k check" || true
        ../contrib/test_summary | grep -A7 Summ || true
    fi
    cd ..
}


package () {
    install -dm755 $PKG_DEST/usr/bin
    install -dm755 $PKG_DEST/usr/share/man
    install -dm755 $PKG_DEST/usr/lib/bfd-plugins

    cd build
    make DESTDIR=$PKG_DEST install
    cd ..

    cp getent  $PKG_DEST/usr/bin/
    cp getconf $PKG_DEST/usr/bin/
    cp iconv   $PKG_DEST/usr/bin/
    cp getent.1   $PKG_DEST/usr/share/man/man1/
    cp getconf.1  $PKG_DEST/usr/share/man/man1/

    ln -s ../bin/cpp $PKG_DEST/usr/lib
    ln -s gcc $PKG_DEST/usr/bin/cc

    ln -sf ../../libexec/gcc/$(gcc -dumpmachine)/$PKG_VER/liblto_plugin.so \
            $PKG_VER/usr/lib/bfd-plugins/

    mkdir -p $PKG_DEST/usr/share/gdb/auto-load/usr/lib
    #mv $PKG_DEST/usr/lib/*gdb.py $PKG_DEST/usr/share/gdb/auto-load/usr/lib

    for p in gcov gcc-ar gcc gcc-ranlib c++ g++ gcc-nm lto-dump gcov-tools gcov-dump cpp; do
        ln -s $TRUPLE-$p $PKG_DEST/usr/bin/$p
    done


}