Problem with friend function and gcc 4.2 with objective-c++

[Ken Worley]

Hi all,

I'm using Xcode 3.1 and just switched to gcc 4.2 from 4.0, but I've  
run into a problem with friend functions when compiling in objective-c+ 
+. I contrived an example that illustrates the problem:

1. Created new Cocoa project
2. Forced compilation of all files to use objective-c++
3. Changed content of main.m to below...

This project builds fine using gcc 4.0, but when I switch the compiler  
setting to use gcc 4.2, I get the errors listed below. Any clues would  
certainly be appreciated if I'm doing something wrong. If not, I guess  
I'll file a bug...

Here's main.m:

#import <Cocoa/Cocoa.h>

class test1
{
        public:
        
                friend test1* newtest1(int x)
                {
                        test1* anobj = new test1();
                        anobj->finishinit(x);
                        return anobj;
                }
                
                virtual ~test1()
                {
                }
                
        private:
                
                int     avalue;
                
                test1()
                {
                        avalue = 0;
                }
                
                void finishinit(int x)
                {
                        avalue = x;
                }
};

int main(int argc, char *argv[])
{
        test1* tobj = newtest1(5);
        delete tobj;
        
    return NSApplicationMain(argc,  (const char **) argv);
}


Here's the build log:

Building target “Untitled” of project “Untitled” with configuration  
“Debug” — (1 error)
            cd /Users/ken/Desktop/Untitled
    /Xcode3.1/Developer/usr/bin/gcc-4.2 -x objective-c++ -arch i386 - 
fmessage-length=0 -pipe -Wno-trigraphs -fpascal-strings -fasm-blocks - 
O0 -Wreturn-type -Wunused-variable -isysroot /Xcode3.1/Developer/SDKs/ 
MacOSX10.5.sdk -mfix-and-continue -fvisibility-inlines-hidden -mmacosx- 
version-min=10.5 -gdwarf-2 -iquote /Users/ken/Desktop/Untitled/build/ 
Untitled.build/Debug/Untitled.build/Untitled-generated-files.hmap -I/ 
Users/ken/Desktop/Untitled/build/Untitled.build/Debug/Untitled.build/ 
Untitled-own-target-headers.hmap -I/Users/ken/Desktop/Untitled/build/ 
Untitled.build/Debug/Untitled.build/Untitled-all-target-headers.hmap - 
iquote /Users/ken/Desktop/Untitled/build/Untitled.build/Debug/ 
Untitled.build/Untitled-project-headers.hmap -F/Users/ken/Desktop/ 
Untitled/build/Debug -I/Users/ken/Desktop/Untitled/build/Debug/include  
-I/Users/ken/Desktop/Untitled/build/Untitled.build/Debug/ 
Untitled.build/DerivedSources -include /var/folders/JE/ 
JEJ3RSLHE9uIDGjXTRTis++++TI/-Caches-/com.apple.Xcode.501/ 
SharedPrecompiledHeaders/Untitled_Prefix-brblicjbwwpqhfahflncgqpvarno/ 
Untitled_Prefix.pch -c /Users/ken/Desktop/Untitled/main.m -o /Users/ 
ken/Desktop/Untitled/build/Untitled.build/Debug/Untitled.build/Objects- 
normal/i386/main.o
/Users/ken/Desktop/Untitled/main.m: In function 'int main(int, char**)':
/Users/ken/Desktop/Untitled/main.m:43: error: 'newtest1' was not  
declared in this scope
		/Users/ken/Desktop/Untitled/main.m:43: error: 'newtest1' was not  
declared in this scope
Build failed (1 error)

Thanks,
Ken

--
Ken Worley
Software Engineer, Tiberius, Inc.



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