link redeclared as different kind of symbol in [...] works in simulator, not device

sefiroths

Member

Posts: 162
Joined: 2010.10

Post: #1

Jul 1, 2011 — 01:16 AM

i have a objective-c program, i added a little lib with linked list in plain c. this is the header:

Code:

typedef struct node *link;

struct node { int v; link next; };

in simulator all compiles well, but when i try to compile for device this error occurs
link redeclared as different kind of symbol in...[...]
what is it?
how can i fix this?
thanks

sealfin

Moderator

Posts: 680
Joined: 2002.04

Post: #2

Jul 1, 2011 — 03:22 AM

I'm not sure why that would compile for the iOS Simulator but for for the device, but why not just remove the forward declaration by reorganising the declaration thus:

Code:

struct node { int v; struct node *next; };

typedef struct node *link;

(I'm also not sure what you would gain by doing that, given that you'll still have to remember that link l = malloc( sizeof( struct node )); - is not having to type an asterix worth that?)

Mark Bishop

OneSadCookie

Luminary

Posts: 5,131
Joined: 2002.04

Post: #3

Jul 1, 2011 — 07:50 AM

You've omitted the most interesting part of the error message....

sefiroths

Member

Posts: 162
Joined: 2010.10

Post: #4

Jul 4, 2011 — 05:13 AM

ok i'll try thanks, i have make so because i was instructed so by school

mmm...interesting part...?
in [...] there are only name of the file that has inside: #include "linkedList.h"

OneSadCookie

Luminary

Posts: 5,131
Joined: 2002.04

Post: #5

Jul 4, 2011 — 08:24 AM

The message should say where the first definition of link is...

sefiroths

Member

Posts: 162
Joined: 2010.10

Post: #6

Jul 6, 2011 — 02:13 AM

thanks for the advice!
i have found that i have an #include "linkedList.h" in
helloworld.h and helloworld.m...
in simulator all went well...strange thing!

however another strange thing...:
in "linkedList.h" i have link and link2k defined in a similar way...but link2k does not gave me that error...mha!

OneSadCookie

Luminary

Posts: 5,131
Joined: 2002.04

Post: #7

Jul 6, 2011 — 08:00 AM

maybe you're missing header guards on linkedList.h?

Skorche

Sage

Posts: 1,478
Joined: 2002.09

Post: #8

Jul 6, 2011 — 08:14 AM

You can always just use #import instead of #include too. It's main function is to remove the need to use header guards.

Scott Lembcke - Howling Moon Software
Author of Chipmunk Physics - A fast and simple rigid body physics library in C.

sefiroths

Member

Posts: 162
Joined: 2010.10

Post: #9

Jul 7, 2011 — 12:43 AM

i didn't know that was header guards

thanks for suggestions!

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