gcc with -DWANT_MFB -DWANT_X11

[Meng-Hsueh Chiang]

Hello,

I am compiling a software on Solaris with gcc as:
gcc -traditional -O2 -DWANT_MFB -DWANT_X11 .....


It was made, but, when I ran the executable, I got:
external error:  no graphics packages; need to define either WANT_X11, or WANT_MFB
Warning: can't initialize display device for graphics.

Could someone please tell me what I might be missing?
I appreciate your reply.

Meng