statically linking c file with android bionic c library

Question

I just wrote a small c file and its header file. dev_access.c and dev_access.h

I want to link it to the bionic library in android and create a statically/dynamically linked archive file.

My files are in /home/preetam/mydev/ The android sources are in /home/preetam/android_source

The following is my current makefile

CROSS           := /home/preetam/bin/CodeSourcery/arm2010/Sourcery_G++_Lite/bin/arm-none-linux-gnueabi
CC              := $(CROSS)-gcc
INC_DIR         := /home/preetam/android_source/bionic/libc
CFLAGS          := -Wall -c -I$(INC_DIR)/include

android_hal: dev_access.o
        ${CC} ${CFLAGS} dev_access.c -o dev_access.a

clean:
        rm -f *.o dev_access.a

I am not sure whats going wrong but header files are not linking and some missing and redefinition errors are coming up. The following is the Console output:

/home/preetam/bin/CodeSourcery/arm2010/Sourcery_G++_Lite/bin/arm-none-linux-gnueabi-gcc -c -Wall -I/home/preetam/android_source/bionic/libc/include -static   -c -o dev_access.o dev_access.c
In file included from /home/preetam/android_source/bionic/libc/include/stdio.h:42,
                 from dev_access.c:1:
/home/preetam/android_source/bionic/libc/include/sys/_types.h:40: fatal error: machine/_types.h: No such file or directory
compilation terminated.
make: *** [dev_access.o] Error 1

First of all, Is my Makefile correct? Whats the proper way to link your programs with bionic libc ? How to make the final object an archive?

I think you need ar to bundle dev_access.o into a lib dev_access.a — Jiminion
– Jiminion, Commented May 14, 2014 at 4:43
I am not able to get make to compile. I am not sure what needs to be included. Also I am not sure if I need the compiled bionic or if the source will suffice. — preetam
– preetam, Commented May 14, 2014 at 5:13
This error seems to be coming from the include of stdio.h itself. — preetam
– preetam, Commented May 14, 2014 at 5:14
You should be using these include paths: libc/arch-$ARCH/include libc/include libc/kernel/common libc/kernel/arch-$ARCH — Jiminion
– Jiminion, Commented May 14, 2014 at 6:08

preetam · Accepted Answer · 2014-05-15 06:10:30Z

1

You should be using these include paths for bionic:

libc/arch-$ARCH/include 
libc/include 
libc/kernel/common 
libc/kernel/arch-$ARCH

ar might have some switches for it...

EDIT: The switch is cr

ar -crv <libname> <source_object>

edited May 15, 2014 at 6:10

preetam

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answered May 14, 2014 at 7:35

Jiminion

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