SV DPI 新手求助

ryan1219

照着书写的程序， 编译通不过  请教哪里有问题？//file: test.sv
import "DPI" function int fact(input int i);

program automatic test;
  initial begin
    for(int i=1; i<=10; i++)
      $display("%0d! = %0d", i, fact(i));
  end
endprogram



//file: test.cpp
#include "svdpi.h"

int fact(int i){
  if(i<=1) return 1;
  else  return i*fact(i-1);
}



编译命令：
vcs -sverilog test.sv test.cc -CFLAGS "-I $VCS_HOME/linux/lib"

结果：
Parsing design file 'test.sv'
Top Level Modules:
       test
No TimeScale specified
Starting vcs inline pass...
2 modules and 0 UDP read.
recompiling module test
All of 3 modules done
g++ -w  -pipe -m32 -I /tool/cbar/apps/vcs/2009.12-3/linux/lib -O -I/tool/cbar/apps/vcs/2009.12-3/include    -c ../test.cpp
if [ -x ../simv ]; then chmod -x ../simv; fi
g++  -o ../simv -melf_i386 -m32   test.o  5NrI_d.o 5NrIB_d.o jAci_1_d.o Yrj5_1_d.o gzYz_1_d.o SIM_l.o    rmapats_mop.o rmapats.o    /tool/cbar/apps/vcs/2009.12-3/linux/lib/libvirsim.a /tool/cbar/apps/vcs/2009.12-3/linux/lib/librterrorinf.so /tool/cbar/apps/vcs/2009.12-3/linux/lib/libsnpsmalloc.so     /tool/cbar/apps/vcs/2009.12-3/linux/lib/libvcsnew.so     /tool/cbar/apps/vcs/2009.12-3/linux/lib/vcs_save_restore_new.o /tool/cbar/apps/vcs/2009.12-3/linux/lib/ctype-stubs_32.a -ldl  -lc -lm -lpthread -ldl
gzYz_1_d.o: In function `T_VCSgd_test_1_2_0':
(.text+0x12a): undefined reference to `fact'  -------------------------------------------------> look at here!!!!
collect2: ld returned 1 exit status
make: *** [product_timestamp] Error 1
Make exited with status 2
CPU time: .134 seconds to compile + .054 seconds to elab + .523 seconds to link

chanel882116

正在学习中。。。。。。。。。。。。

panmf

two options:
[1]chage c code file name from test.cpp to test.c
[2]change test.cpp
extern "C" {
  you code ...
}