strcmp in kernel
tbe...@algonet.se
<linux/string.h>. The compiler says implicit declaratiion
of function.
How do i use strcmp a device driver?
- David Belius
Peter Pointner
strcmp might be defined as inline function. Use at least
gcc -O when compiling your driver to make the inline functions
work.
Peter
ellis
>I can't use strcmp in my device driver even if i include
><linux/string.h>. The compiler says implicit declaratiion
>of function.
>How do i use strcmp a device driver?
Have you looked at linux/string.h? It's certainly prototyped in the
mine:
extern int strcmp(const char *,const char *);
Perhaps you are actually using the right file?
Peter Samuelson
> > I can't use strcmp in my device driver even if i include
> > <linux/string.h>. The compiler says implicit declaratiion of
> > function.
> > How do i use strcmp a device driver?
> strcmp might be defined as inline function. Use at least gcc -O when
> compiling your driver to make the inline functions work.
Yes, you do need -O or -O2 due to inlines, but if that were the problem
it wouldn't show up until link time (i.e. insmod time), I believe.
My theory is that you're not using the right kernel header files. You
need to use "-I/usr/src/linux/include" or wherever your kernel source
tree resides. Once upon a time you could omit that flag because
/usr/include had symlinks for the necessary directories, but if you use
libc6 you may well have real directories there instead, populated by
glibc's version of the kernel headers.
--
Peter Samuelson
<sampo.creighton.edu!psamuels>
Peter Pointner
> [tbe...@algonet.se]
>> > I can't use strcmp in my device driver even if i include
>> > <linux/string.h>. The compiler says implicit declaratiion of
>> > function.
>> > How do i use strcmp a device driver?
> [Peter Pointner <pe...@wuzel.m.isar.de>]
>> strcmp might be defined as inline function. Use at least gcc -O when
>> compiling your driver to make the inline functions work.
> Yes, you do need -O or -O2 due to inlines, but if that were the problem
> it wouldn't show up until link time (i.e. insmod time), I believe.
Thank you for correction. I always think people should read the question
before they answer. Apparently 4 lines were to much for me.
Sorry,
Peter
[better answer snipped]