Hi, All.

I need use kernel headers to build a IPU app. 
I select KERNEL_HEADERS in ptxdist and I add CFLAGS="-I$(KERNEL_HEADERS_INCLUDE_DIR)" in *.make.
Also I have added in the makefile -I$(KERNEL_HEADERS_INCLUDE_DIR)

But it still does not compile because it does not find the headers.
It looks like the variable KERNEL_HEADERS_INCLUDE_DIR is empty, this can be seen in the output of the compilation.

-------------------------
target: alpha_ex1.compile
-------------------------
make[1]: Entering directory `/ptxdist/BSP/local_src/alpha_ex1'
arm-v7a-linux-gnueabihf-gcc -g -O0 -o alpha_ex1 alpha_ex1.c -I \
-I/uapi
alpha_ex1.c:26:25: fatal error: linux/mxcfb.h: No such file or directory
 #include <linux/mxcfb.h>

Is there something wrong?

Thanks!