From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-help-return-47639-listarch-gcc-help=gcc.gnu.org@gcc.gnu.org>
Received: (qmail 12521 invoked by alias); 22 Sep 2011 19:19:34 -0000
Received: (qmail 12484 invoked by uid 22791); 22 Sep 2011 19:19:33 -0000
X-SWARE-Spam-Status: No, hits=-1.9 required=5.0	tests=BAYES_00,FREEMAIL_FROM,RCVD_IN_DNSWL_NONE,T_TO_NO_BRKTS_FREEMAIL
X-Spam-Check-By: sourceware.org
Received: from smtp2-g21.free.fr (HELO smtp2-g21.free.fr) (212.27.42.2)    by sourceware.org (qpsmtpd/0.43rc1) with ESMTP; Thu, 22 Sep 2011 19:19:17 +0000
Received: from [127.0.0.1] (unknown [62.147.250.108])	by smtp2-g21.free.fr (Postfix) with ESMTP id 39E9F4B00BE	for <gcc-help@gcc.gnu.org>; Thu, 22 Sep 2011 21:19:10 +0200 (CEST)
Message-ID: <4E7B8A22.8020509@free.fr>
Date: Thu, 22 Sep 2011 19:19:00 -0000
From: dboml <dboml@free.fr>
User-Agent: Mozilla/5.0 (Windows NT 5.1; rv:6.0.2) Gecko/20110902 Thunderbird/6.0.2
MIME-Version: 1.0
To: gcc-help@gcc.gnu.org
Subject: How use linux_kernel init_calls system in a modular application?
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
X-IsSubscribed: yes
Mailing-List: contact gcc-help-help@gcc.gnu.org; run by ezmlm
Precedence: bulk
List-Id: <gcc-help.gcc.gnu.org>
List-Archive: <http://gcc.gnu.org/ml/gcc-help/>
List-Post: <mailto:gcc-help@gcc.gnu.org>
List-Help: <mailto:gcc-help-help@gcc.gnu.org>
Sender: gcc-help-owner@gcc.gnu.org
X-SW-Source: 2011-09/txt/msg00182.txt.bz2

Hello,
I develop a modular application like this:
main.c
main.h
modul1/module1.c
modul1/module1.h
modul2/module2.c
modul2/module2.h
modul3/module3.c
modul3/module3.h

so in main.c, i need to include all modules header like this:

#ifdef USE_MODULE_1
     #include modul1/module1.H
#endif
#ifdef USE_MODULE_2
     #include modul2/module2.H
#endif
#ifdef USE_MODULE_3
     #include modul3/module3.H
#endif

int main () {
     #ifdef USE_MODULE_1
         module1_init();
     #endif
     #ifdef USE_MODULE_2
         module2_init();
     #endif
     #ifdef USE_MODULE_3
         module3_init();
     #endif
}

So, i decide to use the system in linux KERNEL initCalls.
It is based on linker sections where are stor init modules functions.
in main.h:
typedef int (*initcall_t)(void);
#define MODULE_INIT(fn) static initcall_t __initcall_##fn __used 
__attribute__((__section__(".initcall.init"))) = fn;

in modul1/module1.c :
MODULE_INIT(module1_init)

And then, use it in main.c
main(){
for (fn = __initcall_start; fn < __initcall_end; fn++)
         do_one_initcall(*fn);
}

My question is: how configure the linker for my linux app?
For the moment i "don't use" any special linker script.
Can't find a good tutorial....

Thanks for any help.

David.