Compiling with gcc version 4.6.2 20111004 (prerelease) (Linaro GCC 4.6-2011.10)
on Ubuntu 12.04 I get the following error:
drivers/displays/bitmap/ST7565/ST7565.c:45:20: fatal error: st7565.h: No such file or directory
Case sensitivity issue: need to include "ST7565.h" not "st7565.h"