cross-cc

#!/bin/sh

readonly DEFAULT_PREFIX="/usr/local"

tree="$1"
if [ "$#" -lt "1" -o -z "$tree" -o ! -e "$tree/configure" ]
then
	echo "USAGE: `basename "$0"` <path to gcc source tree> [installation prefix] [configuration flag]..."
	exit 1
elif [ ! -e "$tree/bfd" -o ! -e "$tree/binutils" -o ! -e "$tree/gas" -o ! -e "$tree/gnulib" -o ! -e "$tree/ld" -o ! -e "$tree/libctf" -o ! -e "$tree/libsframe" -o ! -e "$tree/opcodes" ]
then
	cat 2>&1 <<-tac
		ERROR: You must first symlink the following from the binutils source tree into the gcc one:
			bfd/
			binutils/
			gas/
			gnulib/
			ld/
			libctf/
			libsframe/
			opcodes/
			sim/ (optional, available from the repository but not the release tarballs)
	tac
	exit 2
fi
shift

prefix="$DEFAULT_PREFIX"
if [ "$#" -ge "1" ]
then
	prefix="$1"
	shift
fi

stdlibs="$prefix/lib/gcc/riscv32-elf/`cat "$tree/gcc/BASE-VER"`"
if [ -e "$prefix/lib" ]
then
	echo "NOTE: If you are planning to distribute a prebuilt toolchain, you should have cleaned out $prefix before running this script!"
	sleep 5
fi

do=""
if ! mkdir -p "$stdlibs" 2>/dev/null
then
	do="sudo"
	sudo mkdir -p "$stdlibs"
fi

touch "$stdlibs/nosys.specs" 2>/dev/null || sudo touch "$stdlibs/nosys.specs"
cat <<-tac | $do tee "$stdlibs/nosys.specs" >/dev/null
	%rename lib old_lib
	*lib:
	-Ttext=0 %(old_lib)
tac

exec "$tree/configure" --prefix="$prefix" --target=riscv32-elf --with-arch=rv32i --with-specs='%:if-exists-then-else(nosys.specs%s -specs=nosys.specs %:if-exists-then-else(%:getenv(PWD /nosys.specs) -specs=nosys.specs)) %:if-exists-then-else(%:getenv(PWD /libc.a) -L.) %:if-exists-then-else(%:getenv(PWD /crtbegin%O) -B.)' --program-prefix=riscv32- --disable-libssp --enable-languages=c --without-headers "$@"