Linker error when compiling in Xcode

Question

I am getting this error when I am compiling a program in Xcode.

Undefined symbols for architecture i386:
  "_OBJC_CLASS_$_MyDatabase", referenced from:
      objc-class-ref in Gallery_CollectionViewController.o
ld: symbol(s) not found for architecture i386
clang: error: linker command failed with exit code 1 (use -v to see invocation)

score 2 · Accepted Answer · answered Feb 28 '13 at 08:36

2

You have forgotten to add the source file that implements the class MyDatabase to the Xcode target and consequently it hasn't been compiled and linked with the binary.

answered Feb 28 '13 at 08:36

trojanfoe

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so what should I supposed to do now ? – Feb 28 '13 at 09:38
@AshishPatil You need to add the file that implements `MyDatabase` to the binary target. See this SO answer for how to do that: http://stackoverflow.com/questions/5300785/adding-files-to-seperate-targets-in-xcode-4 – trojanfoe Feb 28 '13 at 09:40
m gettin following error now, what is this ? 0x12c3d35: movl 16(%edx), %edx Thread 1 : EXE_BAD_ACCESS – Feb 28 '13 at 09:49
@AshishPatil That's a different issue. Ask a new question about that, and don't forget the symbolic stacktrace (i.e. type `bt` in the debugger console and post the output) and include the code around the lines that crashed. – trojanfoe Feb 28 '13 at 09:50

Linker error when compiling in Xcode

1 Answers1