fix syntax error in makefile

src/test/csrc/verilator/emu.cpp

@@ -225,6 +225,7 @@ uint64_t Emulator::execute(uint64_t max_cycle, uint64_t max_instr) {
   }
 
 #ifdef EN_FORKWAIT
+  printf("[INFO]enable fork wait..\n");
   pid_t pid =-1;
   pid_t originPID = getpid();
   int status = -1;

src/test/csrc/verilator/emu.h

@@ -32,7 +32,6 @@
 #define SLOT_SIZE 3
 #define FAIT_EXIT    exit(EXIT_FAILURE);
 #define WAIT_INTERVAL 1
-#define EN_FORKWAIT
 
 typedef struct shinfo{
   int exitNum;

verilator.mk

@@ -45,8 +45,7 @@ endif
 # Fork-wait 
 EMU_FORKWAIT ?= 
 ifeq ($(EMU_FORKWAIT),1)
-EMU_CXXFLAGS += -DEN_FROKWAIT
-VEXTRA_FLAGS += --trace
+EMU_CXXFLAGS += -DEN_FORKWAIT
 endif
 
 # Verilator coverage