.a files

.a files

[Harris Mark Hatzopoulos]

Hi,

I have a library file libefsl.a that is supposed to include a header file
efs.h that I require.

I am writing a program for a microcontroller in AVR-Studio or WINAVR have
included the header file as follows:

#include <efs.h>


However when I compile I am told efs.h no such file...

I have included the directory of the libefsl.a file in the compiler but
cannot get my program to compile.

I am wondering if I am following the correct procedure? Or else how are
you meant to include header files that live in a lib.a file??

Regards.

Re: .a files

[Sisyphus]

----- Original Message ----- 
From: "Harris Mark Hatzopoulos" <h.hatzopoulos@ugrad.unimelb.edu.au>
.
.
>
> However when I compile I am told efs.h no such file...
>
> I have included the directory of the libefsl.a file in the compiler but
> cannot get my program to compile.
>

You also need to specify the location of efs.h .
eg, in the command line, specify -I/home/me/headers (assuming efs.h is in 
/home/me/headers).

Cheers,
Rob 

Re: .a files

[Kai Ruottu]

Harris Mark Hatzopoulos wrote:

> I have a library file libefsl.a that is supposed to include a header file
> efs.h that I require.

Why you think so? Those '.a' library archives usually have only
precompiled objects, the compiled code for the functions in the
library...

> I am writing a program for a microcontroller in AVR-Studio or WINAVR have
> included the header file as follows:
> 
> #include <efs.h>

This is ok, the header is expected to be in the built-in search
paths of the C preprocessor ('cpp'). If not, one tells with the
'-I<directory>' option where it is...

> However when I compile I am told efs.h no such file...
> 
> I have included the directory of the libefsl.a file in the compiler but
> cannot get my program to compile.

With the '-L<directory>' option on the "compile" or "link" line?

> I am wondering if I am following the correct procedure? Or else how are
> you meant to include header files that live in a lib.a file??

As was told, header files aren't in inside (binary) library files,
they are separate text files somewhere else. The "standard headers"
normally are in '$prefix/$target/include' and the standard libraries
in '$prefix/$target/lib' in a crosscompiler like one for AVR...

Please learn to use Google or something search machine in the net!
A simple search with words "WINAVR efs.h" resulted to the EFSL-
manual :

http://www.mirrorservice.org/sites/download.sourceforge.net/pub/sourceforge/e/ef/efsl/efsl-manual.pdf

and it seemed that this manual teaches all the necessary things like
how to use the necessary '-I' and '-L' options :

---------------- clip ----------------------------
1. Compile the program (gcc -I/home/user/efsl/inc/ -I/home/user/efsl/conf
-o linuxtest linuxtest.c -L./ -lefsl).
---------------- clip ----------------------------