# --- T2-COPYRIGHT-BEGIN ---
# t2/package/*/gcc/gcc.conf
# Copyright (C) 2004 - 2025 The T2 SDE Project
# SPDX-License-Identifier: GPL-2.0
# --- T2-COPYRIGHT-END ---

# TODO: fix eval_config_command to properly evaluate the spaces!
[ $arch != avr32 ] && var_append confopt ' ' '--with-pkgversion=T2\\ SDE'
[ $arch = ia64 -o $arch = nios2 ] && var_append confopt ' ' --enable-obsolete

languages="c,c++"

if [ $stagelevel -le 1 ]; then
	var_append confopt ' ' --program-prefix=${arch_target}-
	toolsroot="${sysroot}/TOOLCHAIN/cross"
	export LDFLAGS="-Wl,-rpath,${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 confopt ' ' '--with-mpfr=$toolsroot --with-mpfr-lib=$toolsroot/lib'
	var_append confopt ' ' '--with-ppl=$toolsroot --with-cloog=$toolsroot --with-gmp=$toolsroot'
	var_append confopt ' ' --disable-libsanitizer
	pkginstalled isl && var_append confopt ' ' --with-isl=$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

# multilib is usually enabled by default, so do not fore re-enable it here, see GCC Bug 43328
if [ "$SDECFG_MULTILIB" != 1 ]; then
	var_append confopt ' ' --disable-multilib
fi

if [ -n "$SDECFG_MULTILIBLIST" ]; then
	# pass multilib-list even when disabled, e.g. for superh
	var_append confopt ' ' --with-multilib-list=$SDECFG_MULTILIBLIST
fi

if [ "$SDECFG_LTO" == 1 ] && ! hasflag NO-LTO; then
	var_append GCC_WRAPPER_INSERT ' ' -DIN_GCC_FRONTEND?-flto=${SDECFG_PARALLEL:-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 $(eval echo $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

	# make sure we use gcc itself, not clang
	[ "$SDECFG_DEFAULT_CC" != gcc -o "$SDECFG_DEFAULT_CXX" != gcc ] &&
		export CC_FOR_TARGET=$arch_target-gcc \
		       GCC_FOR_TARGET=$arch_target-gcc \
		       CXX_FOR_TARGET=$arch_target-g++

	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/
}
hook_add premake  5 "gcc_premake"

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

	# create various symlinks for cc, c++, cpp and f77
	if atstage toolchain; then
		for x in $([ "$SDECFG_DEFAULT_CC" = gcc ] && echo cc
			[ "$SDECFG_DEFAULT_CXX" = gcc ] && echo c++
			[ "$SDECFG_DEFAULT_KCC" = gcc ] && echo kcc); do
			[ $x != c++ ] &&
				ln -svf ${arch_target}-gcc $root/$prefix/bin/${arch_target}-$x ||
				ln -svf ${arch_target}-g++ $root/$prefix/bin/${arch_target}-$x
		done

		if [ "$SDECFG_DEFAULT_CXX" = clang ]; then
			# compat symlink for clang++
			ln -svf $sysroot/usr/include/c++/$ver/ \
				$sysroot/TOOLCHAIN/cross/lib/gcc/$arch_target/$ver/include/c++
		fi

		return
	fi

	for x in $([ "$SDECFG_DEFAULT_CC" = gcc ] && echo cc
		[ "$SDECFG_DEFAULT_CXX" = gcc ] && echo c++
		[ "$SDECFG_DEFAULT_KCC" = gcc ] && echo kcc); do
		[ $x != c++ ] && ln -sfv gcc $root$bindir/$x || ln -sfv g++ $root$bindir/$x
	done

	[ "$SDECFG_DEFAULT_CC" = gcc ] && ln -sfv ..$bindir/cpp $root/lib/cpp
	if [ -f $root$bindir/gfortran ]; then
		ln -sfv gfortran $root$bindir/f77
	fi
}
hook_add postmake 5 "gcc_postmake"

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

[ "$SDECFG_POWERPC64_ELF_ABI" = elfv2 ] && var_append confopt ' ' --with-abi=elfv2

[ $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

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