Question

I am a newbie to linux kernel/system development.

Below is the Makefile i am using to compile my application

CROSS_COMPILE   ?=
KERNEL_DIR  ?= /usr/src/linux

CC      := $(CROSS_COMPILE)gcc
KERNEL_INCLUDE  := -I/usr/include
CFLAGS      := -W -Wall -g $(KERNEL_INCLUDE)
LDFLAGS     := -g

all: finder-drv

finder-drv: finder.o
    $(CC) $(LDFLAGS) -o $@ $^

clean:
    rm -f *.o
    rm -f finder

I am getting the following the error:

/usr/include/arm-linux-gnueabi/sys/ioctl.h:22:22: fatal error: features.h: No such file or directory

I don’t know why the features.h is missing.

This problem came after i run the following command:

make headers_install INSTALL_HDR_PATH=/usr

Can anyone tell me how to fix the issue and correctly link/use kernel header files in a user-space appliation?

Answer 1

Problem Solved.

The correct command to export kernel headers for user-space application is below

make headers_install INSTALL_HDR_PATH=/usr/include

I have given /usr instead of /usr/include

I recovered the deleted files in /usr/include by reinstalling the libc-dev using the following command

apt-get install lib6-dev –reinstall

Chris, Thanks for your time and help.