lkml.org 
[lkml]   [2004]   [Jan]   [20]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: Compiling C++ kernel module + Makefile
From
Date
On Tue, 2004-01-20 at 08:20, Richard B. Johnson wrote:
> Nevertheless, I provide three programs, one written in
> C, the other in C++ and the third in assembly. A tar.gz
> file is attached for those interested.
>
> -rwxr-xr-x 1 root root 57800 Jan 20 10:16 hello+
> -rwxr-xr-x 1 root root 460 Jan 20 10:16 helloa
> -rwxr-xr-x 1 root root 2948 Jan 20 10:16 helloc
>
> The code size, generated from assembly is 460 bytes.
> The code size, generated from C is 2,948 bytes.
> The code size, generated from C++ is 57,800 bytes.
>
> Clearly, C++ is not the optimum language for writing
> a "Hello World" program.

I like C++ and hate to see it so unfairly maligned. Here's a much
better example:

Makefile:
helloc: hello.c
gcc -Os -s -o helloc hello.c

hellocpp: hello.cpp
g++ -Os -fno-rtti -fno-exceptions -s -o hellocpp hello.cpp

Both programs contain exactly the same code: one main() function using
puts("Hello world!").

# ls -l
-rwxrwxr-x 1 jbriggs jbriggs 2840 Jan 20 10:02 helloc
-rwxrwxr-x 1 jbriggs jbriggs 2948 Jan 20 10:06 hellocpp

108 extra bytes is hardly the end of the world.
--
Zan Lynx <zlynx@acm.org>
[unhandled content-type:application/pgp-signature]
\
 
 \ /
  Last update: 2005-03-22 14:00    [from the cache]
©2003-2014 Jasper Spaans. Advertise on this site