Re: [ccan] New to ccan

[David Gibson <david@gibson.dropbear.id.au>]

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On Wed, May 08, 2024 at 04:34:10PM -0700, Ashok Raj wrote:
> On Tue, May 07, 2024 at 12:54:07PM -0700, Ashok Raj wrote:
> > Hi
> > 
> > I'm new to ccan. I'm trying to use just part of the project (just one
> > module) in another tool. 
> > 
> > I didn't catch the exact method to replicate a single module.

As I recall, we talked about this a bit, but never did come up with a
great method.

> So I went past this step and able to include it in my project.
> 
> But I see the following warning
> 
> [16/247] Compiling C object libccan.a.p/ccan_bitmap_bitmap.c.o
> In file included from ../ccan/bitmap/bitmap.c:5:
> ../ccan/bitmap/bitmap.h: In function bitmap_set_bit:
> ../ccan/bitmap/bitmap.h:61:43: warning: declaration of bitmap shadows a global declaration [-Wshadow]
>    61 | static inline void bitmap_set_bit(bitmap *bitmap, unsigned long n)
>       |                                   ~~~~~~~~^~~~~~
> ../ccan/bitmap/bitmap.h:26:3: note: shadowed declaration is here
>    26 | } bitmap;
>       |   ^~~~~~
> 
> 
> If I were to change the parameter name to _bitmap and in all usages the
> warning disappears. Weird the definition its pointing to is this
> typedewf

Huh.  Looks like the code is relying on types and variables/parameters
being in different namespaces, but that warning doesn't like that.  I
guess we must not have had the relevant warning enabled before.

I made a fix, but it's been so long since I pushed things to the ccan
repo, I've forgotten how and will have to figure it out again.

Speaking of which... ccan is largely moribund at this point.  Neither
Rusty nor I has any real time to devote to it.  And in my case,
collecting C examples - even very nice ones - has become a lot
compelling with the emergence of viable alternative systems
programming languages (Rust, Go, Zig).

-- 
David Gibson			| I'll have my music baroque, and my code
david AT gibson.dropbear.id.au	| minimalist, thank you.  NOT _the_ _other_
				| _way_ _around_!
http://www.ozlabs.org/~dgibson

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