Re: Undefined symbol on class I've used dozens of times
Re: Undefined symbol on class I've used dozens of times
- Subject: Re: Undefined symbol on class I've used dozens of times
- From: Jean-Daniel Dupas <email@hidden>
- Date: Sat, 29 Nov 2008 10:53:18 +0100
Le 29 nov. 08 à 07:18, Ken Tozier a écrit :
Hi
I wrote a base64 encoder/decoder category on NSData and NSString and
have been using it without problem for almost two years. Suddenly,
today, when I tried to use it in a new project, Xcode is telling me
four of the utility functions defined in the same file as the
NSCategories are "undefined symbols." I have no clue why this
suddenly started becoming a problem for Xcode, because as recently
as a month ago, I created a project that used these categories and
got zero "undefined symbol" errors. I've not done any Xcode or
system upgrades since last using the class.
What could be causing this? The symbols are literally defined inside
the file where Xcode says they aren't available. Anyone have an idea
why Xcode isn't seeing functions in the exact file it's compiling?
Thanks for any help
If this is really functions (and not methods), this may append if
you're trying to use them on a (Obj-)C++ file and do declare them as
extern "C".
Else, if it's methods, there is some new symbols visibility rules in
the 64bit compiler/linker. Are you trying to build a 64 bit binary ?
Else, you will have to give more info about your error. (transcript of
compilation)
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