Re: Trouble compiling command-line application

[Fred Kiefer]

zauhar wrote:
> I have been working with Cocoa for a while, but this is my first 
> experience with GNUstep.
>
> I am starting out by trying to port a fairly small command-line 
> application from OS X to Redhat Linux 3.2.2-5 (gcc 3.2.2)
>
> I installed the latest distributions of gnustep base 
> (gnustep-base-1.9.0.tar), backend (gnustep-back-0.9.1.tar) and make 
> (gnustep-make-1.9.0.tar), and I am able to build some small test apps I 
> found in the docs. However, when I try to build my own application, I 
> get this when compiling main.m :
>
> <...various warnings...>
> main.m:285: warning: assignment discards qualifiers from pointer target 
> type
> main.m:311: warning: passing arg 1 of `initWithFlatFile:andMolFile:' 
> discards qualifiers from pointer target type
> main.m:311: warning: passing arg 2 of `initWithFlatFile:andMolFile:' 
> discards qualifiers from pointer target type
> main.m:363: warning: assignment discards qualifiers from pointer target 
> type
> /usr/include/bits/socket.h: At top level:
> /usr/include/bits/socket.h:279: redefinition of `v'
> /usr/include/bits/socket.h:279: `v' previously declared here
> make[1]: *** [shared_obj/main.o] Error 1
> make: *** [rayTrace.all.app.variables] Error 2
>
> This application compiles and works fine under OS X. Thinking there 
> might be something funky with #import under linux, I wrapped my header 
> files in #ifndef's and switched to using #include. Same behavior.
>
> I also started playing with the includes - in particular, I went through 
> and changed all #include <Foundation/Foundation.h> to 
> <Foundation/NSObject.h> which is adequate for some of my classes. This 
> results in the same sort of error, but now the final messages are
>
> main.m:363: warning: `NSString' does not respond to `cString'
> /usr/lib/gcc-lib/i386-redhat-linux/3.2.2/include/objc/sarray.h: At top 
> level:
> /usr/lib/gcc-lib/i386-redhat-linux/3.2.2/include/objc/sarray.h:235: 
> redefinition of `v'
> /usr/lib/gcc-lib/i386-redhat-linux/3.2.2/include/objc/sarray.h:235: `v' 
> previously declared here
> make[1]: *** [shared_obj/main.o] Error 1
> make: *** [rayTrace.all.app.variables] Error 2
>
> Note same crap about "redefinition of `v'", but now in a different file. 
> Something really spurious is going on.

First of all, you should never regard any messages from a compiler as 
"crap", they mostly are valuable hints on problematic lines of code. As 
you are using different version of the gcc on MacOSX and Red Had their 
opinion on problematic code may also be different.
It is hard to tell, what is going wrong in your case without a look at 
the actual code. The problem surely isn't in the header files, where it 
gets reported. I would rather expect it to be in your main.m file. 
Strange enough it seams to get reported on the end of the first inline 
function. If your main.m file in not to big, it would help, if you send 
it along in the next mail.
The new warning you did get is of course due to the fact that you no 
longer included NSString.h.

Cheers
Fred