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8.5 Problems with Objective C

Q: How do I tell gcc my .cc file is to be compiled as Objective-C source?

Q: I compile an Objective-C program, but get unresolved symbols.

Q: I can't compile the Objective-C test program which came with DJGPP.

A: Give your sources the .m extension, or use -x objective-c switch to GCC, so it will know you mean to compile with Objective C.

Objective-C was broken in GCC 2.6.0. The problem manifests itself by unresolved modules. If you use that version, you'll have to upgrade to version 2.6.3 or higher.


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