<div><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> i try to compile a program but it got errors as following cc -DX -I/usr/X11R6/include -c drawgram.c In file included from drawgram.c:7: draw.h:8:27: error: X11/Xaw/Label.h: No such file or directory draw.h:11:32: error: X11/Xaw/SimpleMenu.h: No such file or directory draw.h:12:27: error: X11/Xaw/Paned.h: No such file or directory draw.h:13:25: error: X11/Xaw/Box.h: No such file or directory draw.h:14:32: error: X11/Xaw/MenuButton.h: No such file or directory draw.h:15:28: error: X11/Xaw/SmeBSB.h: No such file or directory draw.h:16:26: error: X11/Xaw/Form.h: No such file or directory draw.h:17:28: error: X11/Xaw/Dialog.h: No such file or directory make: *** [drawgram.o ] Error 1 i looked at /usr/include/X11/, it doesn't have these header files. what rpm contains them? </blockquote></div> just reply myself i found libXaw-devel is the one