"Meng-Hsueh Chiang" <mhchiang@xxxxxxxx> writes: > Hello, > > I am compiling a software on Solaris with gcc as: > gcc -traditional -O2 -DWANT_MFB -DWANT_X11 ..... [snip] This sis specific to the software package you are compiliing, and not a gcc issue. (I guess the package requires one or the other, exclusive. )