# --- T2-COPYRIGHT-NOTE-BEGIN ---
# T2 SDE: package/*/gcc/gcc.conf
# Copyright (C) 2004 - 2023 The T2 SDE Project
# 
# This Copyright note is generated by scripts/Create-CopyPatch,
# more information can be found in the files COPYING and README.
# 
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2.
# --- T2-COPYRIGHT-NOTE-END ---

languages="c,c++"

if [ $stagelevel -le 1 ]; then
	var_append confopt " " '--program-prefix=${arch_target}-'
	toolsroot="${sysroot}/TOOLCHAIN/tools.cross"
	export LDFLAGS="-Wl,-rpath,${toolsroot}/lib"

	var_append patchfiles " " "$confdir/gxx_include.diff"

	if atstage toolchain; then
		var_append confopt " " "--with-sysroot=$sysroot"
		var_append confopt " " "--disable-shared"
		var_append confopt " " "--disable-libatomic --disable-libstdc++-v3 --disable-libsanitizer"
		var_append confopt " " "--disable-libssp --disable-libgomp --disable-cet"
		var_append confopt " " "--disable-target-libiberty --disable-vtable-verify"
		var_append confopt " " "--disable-libitm --disable-libcilkrts"
		var_append confopt " " "--disable-libquadmath --disable-decimal-float"
	elif [ $stagelevel = 1 ]; then
	    if [ "$SDECFG_LIBC" = "uclibc" ]; then
		configscript="../libstdc++-v3/configure"
	    else
		CC="cc" CXX="c++"     CPP="cpp" OBJDUMP="objdump"
		AS="as" STRIP="strip" OBJCOPY="objcopy"
		LD="ld" AR="ar"       RANLIB="ranlib" NM="nm"

		var_remove_regex confopt ' ' '--prefix=.*'
		var_remove_regex confopt ' ' '--bindir=.*'
		var_remove_regex confopt ' ' '--libdir=.*'
		var_remove_regex confopt ' ' '--includedir=.*'
		var_insert confopt ' ' "--libexecdir=$toolsroot/$prefix/libexec"
		var_insert confopt ' ' "--libdir=$toolsroot/$prefix/lib"
		var_insert confopt ' ' "--bindir=$toolsroot/$prefix/bin"
		var_insert confopt ' ' "--prefix=$toolsroot/$prefix"

		var_remove_regex confopt ' ' '--datadir=.*'
		var_remove_regex confopt ' ' '--infodir=.*'
		var_remove_regex confopt ' ' '--mandir=.*'
		var_remove_regex confopt ' ' '--sbindir=.*'
		var_remove_regex confopt ' ' '--localstatedir=.*'
		var_remove_regex confopt ' ' '--sysconfdir=.*'

		var_remove_regex confopt ' ' '--host=.*'
		var_append confopt ' ' "--host=\$arch_build"

		var_remove_regex makeopt ' ' 'prefix=.*'
		var_remove_regex makeinstopt ' ' 'prefix=.*'
		var_remove_regex makeinstopt ' ' 'DESTDIR=.*'
		var_remove_regex makeinstopt ' ' 'docdir=.*'

		# override to install headers into the actual sysroot
		var_append confopt ' ' "--with-gxx-include-dir=$root$includedir/c++/$ver"
		var_append confopt ' ' "--with-toolexeclibdir=$root$libdir"
	    fi
	fi

	# we need to help configure pick up our native libraries in the toolchain dir
	var_append extraconfopt ' ' '--with-mpfr=$toolsroot --with-mpfr-lib=$toolsroot/lib'
	var_append extraconfopt ' ' '--with-ppl=$toolsroot --with-cloog=$toolsroot --with-gmp=$toolsroot'
	var_append extraconfopt ' ' '--disable-libsanitizer'
	pkginstalled isl && var_append extraconfopt ' ' '--with-isl=$toolsroot'
	unset toolsroot
fi

if ! atstage toolchain; then
	[ $stagelevel = 2 ] &&
		confopt="${confopt/--with-sysroot/--with-libtool-sysroot}"

	# shared, or not shared?
	if [ "$diet_dynamic_static" == "static" ]; then
		var_append confopt " " "--disable-shared"
	else
		var_append confopt " " "--enable-shared"
	fi

	var_append confopt " " "--with-gnu-as --with-gnu-ld --enable-threads=posix"

	# Ada support is implemented in Ada, so GNAT has to be present
	[ "$SDECFG_PKG_GCC_GNAT" = 1 ] && case "$arch" in
	alpha|arc|microblaze|loongarch*|mips64|nios2|riscv)
		: ;;
	*)
		var_append languages ',' "ada" ;;
	esac

	# unsupported / not broken, arch / languages:
	case "$arch" in
	loongarch)
		: ;;
	arc|riscv)
		var_append languages ',' 'fortran' ;;
	hppa*|loongarch64|mips64|microblaze|nios2|sparc*)
		# sparc64 ICE in go
		var_append languages ',' 'objc,fortran' ;;
	*)
		[ "$SDECFG_PKG_GCC_GO" = 1 ] && var_append languages ',' 'go'
		var_append languages ',' "objc,fortran" ;;
	esac

	if [ "$SDECFG_LIBC" != "glibc" ]; then
		var_remove languages ',' 'ada'
		var_append confopt ' ' '--enable-clocale=generic'
	fi
fi

# not relied on by T2, but for the actual system user to get the same
case "$arch" in
  avr32|blackfin|cris|ia64) ;;
  *)
  for x in $GCC_WRAPPER_INSERT $GCC_WRAPPER_APPEND; do
    case "$x" in
	-march=*)	var_append confopt " " "${x/-m/--with-}" ;;
	-mcpu=*)	var_append confopt " " "${x/-m/--with-}" ;;
	-mtune=*)	var_append confopt " " "${x/-m/--with-}" ;;
    esac
  done
esac

# at least the fortran parts get unresolved errors when we remove -Werror???
var_remove GCC_WRAPPER_REMOVE " " "-Werror"
# emmintrin.h: error: cast discards 'const' qualifier from pointer target type [-Werror=cast-qual]
var_append GCC_WRAPPER_REMOVE ' ' '*/libgo/*?-Werror:'

# create and set up cmd_wrapper for xgcc
setup_xgcc_wrapper() {
	mkdir gcc; pushd gcc

	cat <<-EOF > xgcc-wrapper
#!/bin/bash
# place the xgcc in the path
export PATH="$PWD:\$PATH"
[ "\$GCC_WRAPPER_DEBUG" = 1 ] && export CMD_WRAPPER_DEBUG=1
mycmd=\$1
if [ "\${mycmd%gcj}" != "\$mycmd" ]; then
  export CMD_WRAPPER_OTHERS="\$GCJ_WRAPPER_OTHERS"
  export CMD_WRAPPER_INSERT="\$GCJ_WRAPPER_INSERT"
  export CMD_WRAPPER_REMOVE="\$GCJ_WRAPPER_REMOVE"
  export CMD_WRAPPER_APPEND="\$GCJ_WRAPPER_APPEND"
  export CMD_WRAPPER_FILTER="\$GCJ_WRAPPER_FILTER"
elif [ "\${mycmd%gfortran}" != "\$mycmd" ]; then
  export CMD_WRAPPER_OTHERS="\$F95_WRAPPER_OTHERS"
  export CMD_WRAPPER_INSERT="\$F95_WRAPPER_INSERT"
  export CMD_WRAPPER_REMOVE="\$F95_WRAPPER_REMOVE"
  export CMD_WRAPPER_APPEND="\$F95_WRAPPER_APPEND"
  export CMD_WRAPPER_FILTER="\$F95_WRAPPER_FILTER"
elif [ "\${mycmd%g++}" != "\$mycmd" ]; then
  export CMD_WRAPPER_OTHERS="\$CXX_WRAPPER_OTHERS:\$GCC_WRAPPER_OTHERS"
  export CMD_WRAPPER_INSERT="\$CXX_WRAPPER_INSERT \$GCC_WRAPPER_INSERT"
  export CMD_WRAPPER_REMOVE="\$CXX_WRAPPER_REMOVE \$GCC_WRAPPER_REMOVE"
  export CMD_WRAPPER_APPEND="\$CXX_WRAPPER_APPEND \$GCC_WRAPPER_APPEND"
  export CMD_WRAPPER_FILTER="\$CXX_WRAPPER_FILTER|\$GCC_WRAPPER_FILTER"
else
  export CMD_WRAPPER_OTHERS="\$CC_WRAPPER_OTHERS:\$GCC_WRAPPER_OTHERS"
  export CMD_WRAPPER_INSERT="\$CC_WRAPPER_INSERT \$GCC_WRAPPER_INSERT"
  export CMD_WRAPPER_REMOVE="\$CC_WRAPPER_REMOVE \$GCC_WRAPPER_REMOVE"
  export CMD_WRAPPER_APPEND="\$CC_WRAPPER_APPEND \$GCC_WRAPPER_APPEND"
  export CMD_WRAPPER_FILTER="\$CC_WRAPPER_FILTER|\$GCC_WRAPPER_FILTER"
fi
exec cmd_wrapper "\$@"
EOF

	chmod 0755 xgcc-wrapper
	export STAGE_CC_WRAPPER=$PWD/xgcc-wrapper

	popd
}

# historically we did not had to explicitly specifiy the target for "Canadian
# crossbuild", since gcc-4.3 we have to:
var_append confopt ' ' '--target=${arch_target}'

# See http://gcc.gnu.org/gcc-3.2/c++-abi.html
# and http://www.codesourcery.com/cxx-abi/.
var_append confopt ' ' "--enable-__cxa_atexit"

# we might build a SVN or prereleases, disable checking
var_append confopt ' ' '--disable-checking'

# we build a cross compiler in stage0 and later use known good GCCs, no bstrap
var_append confopt ' ' '--disable-bootstrap'

# not really useful and just blows up the binary package
var_append confopt ' ' '--disable-libstdcxx-pch'

# add the multi-lib config
if [ "$SDECFG_MULTILIB" = 1 ]; then
	# multilib is usually enabled by default, so do not enable it here see GCC Bug 43328
	# multilib bootstrap broken: var_append confopt ' ' "--enable-multilib"
	if [ -n "$SDECFG_MULTILIBLIST" ]; then
		var_append confopt ' ' "--with-multilib-list=$SDECFG_MULTILIBLIST"
	fi
else
	var_append confopt ' ' "--disable-multilib"
fi

if [ "$SDECFG_LTO" == 1 ]; then
	var_append GCC_WRAPPER_INSERT " " "-DIN_GCC_FRONTEND?-flto=${SDECFG_PARALLEL_MAX:-auto}"
	var_append GCC_WRAPPER_INSERT " " "-DIN_GCC_FRONTEND?-fwhole-program"
fi

# only left for uclibc libatomic
gcc_build_module() {
    for x; do
	mkdir x-$x; cd x-$x
	configscript="../../$x/configure"
	eval_config_command $confopt
	eval $MAKE $makeopt
	eval $MAKE $makeinstopt
	cd ..
	configscript=../configure
    done
}

if atstage cross; then
	# canadian cross also needs to know the build root to find headers, e.g. for fixincludes
	var_append confopt ' ' '--with-build-sysroot=$root'

	if [ "$SDECFG_KERNEL" = mingw ]; then
		configscript="../libstdc++-v3/configure"
	fi
fi

gcc_premake() {
	# create and set up the xgcc cmd_wrapper
	setup_xgcc_wrapper

	# install binutils bfd lto plugin
	local gcc_ver=$(< ../gcc/BASE-VER)
	mkdir -pv $root$libdir/bfd-plugins/
	ln -sfv ../../libexec/gcc/$arch_target/$gcc_ver/liblto_plugin.so \
		$root$libdir/bfd-plugins/
}

gcc_postmake() {
	# force a tools rebuild
	rm -fv $base/build/$SDECFG_ID/TOOLCHAIN/$toolsdir/.lastupdate

	# only minimal adaptions for stage0
	if atstage toolchain; then
		for x in cc kcc; do
			ln -svf ${arch_target}-gcc \
				$root/$prefix/bin/${arch_target}-$x
		done

		ln -svf ${arch_target}-gcc $root/$prefix/bin/${arch_target}-cc
		rm -vf "$root/$prefix/bin/{gcc,gcj}"
		return
	fi

	# Create various symlinks for cc, c++, cpp and f77.
	ln -sfv gcc $root$bindir/cc
	ln -sfv ..$bindir/cpp $root/lib/cpp
	ln -sfv gcc $root$bindir/kcc
	if [ -f $root$bindir/gfortran ]; then
		ln -sfv gfortran $root$bindir/f77
	fi
}

if [ "$SDECFG_LIBC" != "glibc" ]; then
	var_append confopt " " "--disable-libsanitizer"
	var_remove languages ',' "go"
fi
[ "$arch" = "arm" -a "$SDECFG_SOFTFLOAT" != 1 ] && var_append confopt ' ' '--with-float=hard'
[ "$SDECFG_ARM_ENDIANESS" = 'eb' ] && var_remove languages ',' "go"
[ "$arch" = "mips64" ] && var_append confopt ' ' '--disable-libsanitizer'

[ $arch_sizeof_char_p -gt 4 ] && var_append patchfiles " " "$confdir/tune-inline.diff"

# 32-bit default 64-bit biarch configuration
if [ "$SDECFG_POWERPC64_32" = 1 -o "$SDECFG_SPARC64_32BIT" = 1 ]; then
    [ $arch = "powerpc64" ] && var_append confopt " " "--with-cpu=default32"
    var_append patchfiles " " "$confdir/m32-default.diff"

    var_remove languages ',' "fortran" # why?
    var_remove languages ',' "go"
    var_remove languages ',' "ada"

    gcc_default_m32() {
	echo "Running $makeopt all-host"
	eval $MAKE $makeopt all-host
	var_append GCC_WRAPPER_INSERT " " "-m32?:-m64"
    }

    # simulate -m64 default thru our wrapper for the target multilibs
    hook_add premake 7 "gcc_default_m32"
fi

hook_add premake  5 "gcc_premake"
hook_add postmake 5 "gcc_postmake"

var_insert confopt ' ' '--enable-languages=$languages'