Re: [MiNT] This must be an gcc / ld error!

[Vincent Rivière <vincent.riviere@freesbee.fr>]

Ole Loots wrote:
> How to compile this code:
>
> #include<string.h>
>
> int main ( void )
> {
> 	char * x = "1235554444111abc";
> 	char * y;
> 	y = strchrnul(x, (int)'a');
> 	return( 0 );
> }
>
> without missing references?

What do you call a "missing reference" ? A linker unresolved external ?

I use the CVS MiNTLib shipped with my cross-compiler and I don't get any 
unresolved external.

However, by default strchrnul() is not declared in string.h. I causes a 
warning, not an error :

$ m68k-atari-mint-gcc -Wall tst.c -o tst.tos
tst.c: In function 'main':
tst.c:7:2: warning: implicit declaration of function 'strchrnul'
tst.c:7:4: warning: assignment makes pointer from integer without a cast

Using a function without a prototype is allowed by the C language but should 
be avoided, because arguments may be passed incorrectly.

There are a lot of nonstandard functions supported by the MiNTLib but not 
declared by default. You can turn all these features on by defining _GNU_SOURCE.

$ m68k-atari-mint-gcc -Wall -D_GNU_SOURCE tst.c -o tst.tos

No more warnings, everything fine.

--
Vincent Rivière