How to compile linux apps?

[Brian John]

Hello, I'm trying to compile the 'allin1' dockapp for fluxbox.  When I 
type 'make', I get the following errors:
n# make
gcc -ggdb -Wall -O2 -c allin1.c
allin1.c:32:22: X11/Xlib.h: No such file or directory
In file included from allin1.c:34:
dockhelper.h:86: error: syntax error before '*' token
dockhelper.h:89: error: syntax error before "p"
dockhelper.h:92: error: syntax error before '*' token
dockhelper.h:95: error: syntax error before "src"
dockhelper.h:98: error: syntax error before '*' token
dockhelper.h:98: warning: type defaults to `int' in declaration of 
`dh_display'
dockhelper.h:98: warning: data definition has no type or storage class
In file included from allin1.c:37:
cpu.h:54: error: syntax error before "Pixmap"
allin1.c: In function `main':
allin1.c:174: error: syntax error before "event"
allin1.c:414: warning: implicit declaration of function `XPending'
allin1.c:415: warning: implicit declaration of function `XNextEvent'
allin1.c:415: error: `event' undeclared (first use in this function)
allin1.c:415: error: (Each undeclared identifier is reported only once
allin1.c:415: error: for each function it appears in.)
allin1.c:417: error: `Expose' undeclared (first use in this function)
allin1.c:418: warning: implicit declaration of function `XCheckTypedEvent'
allin1.c:421: error: `DestroyNotify' undeclared (first use in this function)
allin1.c:422: warning: implicit declaration of function `XCloseDisplay'
*** Error code 1

Stop in /usr/home/brian/allin1-0.5.0/src.


Any clue how I can compile this?

Thanks

/Brian