Re: Compiling C++ kernel module + Makefile

[Zan Lynx <zlynx _at_ xxxxxxx>]

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 _at_ acm.org>

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