From mboxrd@z Thu Jan  1 00:00:00 1970
From: Manfred Hollstein <mhollstein@cygnus.com>
To: mrs@windriver.com
Cc: cih@wahoo.com.tw, gcc@gcc.gnu.org
Subject: Re: GCC For Embedded!?
Date: Mon, 03 Jan 2000 06:06:00 -0000
Message-id: <14448.43924.819828.84599@saturn.hollstein.net>
References: <199912282341.PAA00765@kankakee.wrs.com>
X-SW-Source: 2000-01/msg00032.html

On Tue, 28 December 1999, 15:41:39, mrs@windriver.com wrote:

 > > Date: Thu, 23 Dec 1999 10:41:03 +0800
 > > From: CIH <cih@wahoo.com.tw>
 > 
 > > static void XYZ()
 > > {
 > > // The XYZ function code is very big...
 > > }
 > 
 > > My god... I almost try all gcc command options, but "test" file still
 > > has the very big function "XYZ"...
 > 
 > compile with -ffunction-sections, and run the linker with
 > --gc-sections (sp?).

Also, add -fdata-sections; and, make sure, you've used these flags
when building your libs, too...

Use this:

$ ${target}-gcc -ffunction-sections -fdata-sections -c -Wall test.c
$ ${target}-nm test.o | grep XYZ
00000000 t XYZ
$ ${target}-gcc -ffunction-sections -fdata-sections -Wl,--gc-sections test.o
$ ${target}-nm a.out | grep XYZ
$ 

Cheers.

l8er
manfred