CODEWITHSUNDEEP
c++iphoneiosobjective-c
Fables Alive
Fables Alive

Reputation: 2810

m and mm file extension dilemma

got a file named GeneralUtils.m and its header file. Im using that as a shared methods in several IOS projects.

Question: some of projects are compiling success. but one of project throws error at compile time:than I'm changing m file extension to mm file. and it compiles.but by the way;other projects does not compile and renaming again mm extension to "m" back again.

I want to understand the logic. why some of my IOS project wants its extension as m and other one wants it as mm file extension

Error details :

Undefined symbols for architecture armv7:
  "randIntBetween(int, int)", referenced from:
   -[Blah method1] in File1.o
   ld: symbol(s) not found for architecture armv7
   clang: error: linker command failed with exit code 1 (use -v to see invocation)

Upvotes: 1

Views: 9192

Answers (1)

Öö Tiib
Öö Tiib

Reputation: 11051

The extension .m means that it is Objective-C and the extension .mm means that it is Objective-C++. So those are different files and you should know what is in it.

Upvotes: 9

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