Hi All, I don't understand why gcc is unable to compile the following line: printf("1 -- " __FUNCTION__ "\n"); but gcc can compile this line: printf("1 -- %s\n", __FUNCTION__); what's different between these two lines since __FUNCTION__ is a predefined macro which works as a const string? My gcc is --------------- Reading specs from /usr/lib/gcc-lib/i686-pc-cygwin/3.3.1/specs Configured with: /GCC/gcc-3.3.1-3/configure --with-gcc --with-gnu-ld --with-gnu-as --prefix=/usr --exec-prefix=/usr --sysconfdir=/etc --libdir=/usr/lib --libexecdir=/usr/sbin --mandir=/usr/share/man --infodir=/usr/share/info --enable-languages=c,ada,c++,f77,pascal,java,objc --enable-libgcj --enable-threads=posix --with-system-zlib --enable-nls --without-included-gettext --enable-interpreter --enable-sjlj-exceptions --disable-version-specific-runtime-libs --enable-shared --disable-win32-registry --enable-java-gc=boehm --disable-hash-synchronization --verbose --target=i686-pc-cygwin --host=i686-pc-cygwin --build=i686-pc-cygwin Thread model: posix gcc version 3.3.1 (cygming special) Best Regards PRC Jul 1, 2008