I tried to use warn_unused_result in following C++ code. #include <stdio.h> class myClass { public: int count() __attribute__((warn_unused_result)) { return printf("hello world\n"); } }; int main() { myClass obj; obj.count(); return 0; } But it is giving compile error. test.cpp:6: syntax error before `{' token Could someone tell me how to use this attribute in C++ methods? bash-2.05b$ g++ -v Reading specs from /usr/lib/gcc-lib/i386-redhat-linux/3.2.3/specs Configured with: ../configure --prefix=/usr --mandir=/usr/share/man --infodir=/usr/share/info --enable-shared --enable-threads=posix --disable-checking --with-system-zlib --enable-__cxa_atexit --host=i386-redhat-linux Thread model: posix gcc version 3.2.3 20030502 (Red Hat Linux 3.2.3-20) Regards, Mohan