diff -ur SystemPerl-1.344/src/SpTraceVcdC.cpp SystemPerl-1.344_fix/src/SpTraceVcdC.cpp
--- SystemPerl-1.344/src/SpTraceVcdC.cpp	2014-11-06 04:20:09.000000000 +0100
+++ SystemPerl-1.344_fix/src/SpTraceVcdC.cpp	2018-10-21 14:31:43.220304066 +0200
@@ -682,7 +682,7 @@
     vcdp->chgDouble   (0x1c, doub);
 }
 
-main() {
+int main(int argc, char **argv) {
     cout<<"test: O_LARGEFILE="<<O_LARGEFILE<<endl;
 
     v1 = v2 = s1 = 0;