Yes, it is compiled well with gcc 3.4.6, but it doesn't work with gcc 4.1.2 thank you Her, Il Technology Consulting Technology Service Korea TEL : +82-2-2199-4475 Mobile : +82-10-4765-5597 il.her@xxxxxx -----Original Message----- From: Ian Lance Taylor [mailto:iant@xxxxxxxxxx] Sent: Tuesday, May 31, 2011 10:51 PM To: Her, Il Cc: gcc-help@xxxxxxxxxxx Subject: Re: Undefined reference to template function ... "Her, Il" <il.her@xxxxxx> writes: > Thank you for answering my question. > Here is my sample. > > [Test.h] > #ifndef __TEST_hh > #define __TEST_hh > struct TEST > { > int a, b; > }; > #endif > > [sub.h] > #include <stdio.h> > template <typename T> struct Base > { > void dump(T &r); > int fn(int a, int b); > }; > > [sub.cpp] > #include "sub.h" > > template<typename T> void Base<T>::dump(T &r) > { > } > > template<typename T> int Base<T>::fn(int a, int b); > { > return 0; > } > > [main.cpp] > #include <stdio.h> > #include "sub.h" > #include "TEST.h" > > int main() > { > Base<TEST> t; > TEST x; > > t.dump(x); > t.fn(1, 2); > } > > ** Result of compiling > [test@test-1] $ g++ -c -dynamic sub.cpp > [test@test-1] $ g++ -shared -o libsub.so sub.o > [test@test-1] $ g++ -g -W -o main main.cpp -lsub -L./ > /tmp/ccaUlqlQ.o: In function `main`: > /home/guinsa/main.cpp:10: undefined reference to `Base<TEST>::dump(TEST&)` > /home/guinsa/main.cpp:11: undefined reference to `Base<TEST>::fn(int, int)` > collect2: ld returned 1 exit status In your earlier message you said that you had code that worked with gcc 3.4.6 but failed with gcc 4.1.2. Does this test case work with gcc 3.4.6? Ian
