g++    emmu.o verilated.o Vemmu__ALL.a   -Wl,--start-group -Wl,--end-group  -o Vemmu -lm -lstdc++  2>&1 | c++filt
emmu.o: In function `VerilatedVcdC::VerilatedVcdC(VerilatedVcdFile*)':
emmu.cpp:(.text._ZN13VerilatedVcdCC2EP16VerilatedVcdFile[VerilatedVcdC::VerilatedVcdC(VerilatedVcdFile*)]+0x1f): undefined reference to `VerilatedVcd::VerilatedVcd(VerilatedVcdFile*)'
emmu.o: In function `VerilatedVcdC::open(char const*)':
emmu.cpp:(.text._ZN13VerilatedVcdC4openEPKc[VerilatedVcdC::open(char const*)]+0x1f): undefined reference to `VerilatedVcd::open(char const*)'
emmu.o: In function `VerilatedVcdC::close()':
emmu.cpp:(.text._ZN13VerilatedVcdC5closeEv[VerilatedVcdC::close()]+0x14): undefined reference to `VerilatedVcd::close()'
emmu.o: In function `VerilatedVcdC::dump(unsigned long)':
emmu.cpp:(.text._ZN13VerilatedVcdC4dumpEm[VerilatedVcdC::dump(unsigned long)]+0x1f): undefined reference to `VerilatedVcd::dump(unsigned long)'
collect2: error: ld returned 1 exit status