I'm testing xf86-video-ati-6.7.195 on Gentoo Linux/PowerPC.  During compile it fails with:
 powerpc-unknown-linux-gnu-gcc -DHAVE_CONFIG_H -I. -I. -I.. -I/usr/include/xorg -I/usr/include/drm -I/usr/include/X11/dri -O2 -mtune=G4 -mcpu=G4 -maltivec -mabi=altivec -pipe -Wall -MT atiprint.lo -MD -MP -MF .deps/atiprint.Tpo -c atiprint.c  -fPIC -DPIC -o .libs/atiprint.o
atiprint.c: In function 'ATIPrintRegisters':
atiprint.c:644: error: 'uint32_t' undeclared (first use in this function)
atiprint.c:644: error: (Each undeclared identifier is reported only once
atiprint.c:644: error: for each function it appears in.)
atiprint.c:644: error: expected ';' before 'data'
atiprint.c:646: error: 'data' undeclared (first use in this function)
make[2]: *** [atiprint.lo] Error 1

The fix is quite simple:

diff -Naur xf86-video-ati-6.7.195.orig/src/atiprint.c
xf86-video-ati-6.7.195/src/atiprint.c
--- xf86-video-ati-6.7.195.orig/src/atiprint.c  2007-10-08 00:20:51.000000000 +0200
+++ xf86-video-ati-6.7.195/src/atiprint.c       2007-10-08 00:22:16.000000000 +0200
@@ -26,6 +26,7 @@

 #include <string.h>
 #include <ctype.h>
+#include <stdint.h>

 #include "ati.h"
 #include "atichip.h"

There is one other Gentoo user who confirmed this bug on x86 as well.  See the bug-report in the URL-field.