Link fuzzer to the rustc crate

mk/fuzzer.mk

@@ -5,6 +5,16 @@
 FUZZER_CRATE := $(S)src/fuzzer/fuzzer.rc
 FUZZER_INPUTS := $(wildcard $(addprefix $(S)src/fuzzer/, *.rs))
 
-stage2/fuzzer.o: $(FUZZER_CRATE) $(FUZZER_INPUTS) $(SREQ1)
+stage2/fuzzer.o: $(FUZZER_CRATE) $(FUZZER_INPUTS) $(SREQ1) \
+		stage2/$(CFG_RUSTCLIB)
 	@$(call E, compile: $@)
 	$(STAGE1) -c -o $@ $<
+
+stage2/fuzzer$(X): stage2/fuzzer.o $(SREQ1)
+	@$(call E, link [gcc]: $@)
+	$(Q)gcc $(CFG_GCC_CFLAGS) stage2/glue.o -o $@ $< \
+      -Lstage2 -Lrustllvm -Lrt -lrustrt -lrustllvm -lstd -lm -lrustc
+	@# dsymutil sometimes fails or prints a warning, but the
+	@# program still runs.  Since it simplifies debugging other
+	@# programs, I\'ll live with the noise.
+	-$(Q)$(CFG_DSYMUTIL) $@

src/fuzzer/Fuzzer.rs

@@ -1,2 +1,3 @@
-fn main() {
+fn main(vec[str] args) {
+  rustc.driver.rustc.main(args);
 }

src/fuzzer/fuzzer.rc

@@ -1,6 +1,7 @@
 // -*- rust -*-
 
 use std;
+use rustc;
 
 mod Fuzzer;