beremiz

GCC toolchain: Add {SYSROOT} substitution with support for whitespaces

Any instance of {SYROOT} string in config's CFLAGS and LDFLAGS is replaced by sysroot path obtained from "gcc -print-sysroot"
BEREMIZ_OBJS = $(BEREMIZSRC:.c=.o)
all: warn some_binary
@echo "*** all done ***"
warn:
@echo "*** Sample Makefile, does nothing ***"
some_binary: $(BEREMIZ_OBJS)
@echo "* Would link $^ -> $@"
%.o: %.c
@echo "* Would compile $< -> $@"