CODEWITHSUNDEEP
cgccerlangerlang-nif
batman
batman

Reputation: 1447

Erlang NIF Test -- OS X Lion

I'm trying to compile the NIF Test from Erlang (http://www.erlang.org/doc/man/erl_nif.html) on Mac OS X Lion. I can't get it to compile. Am I missing a compiler flag? Here's the error I get:

Computer:~ me $ gcc -fPIC -shared -o niftest.so niftest.c -I /usr/local/Cellar/erlang/R14B02/lib/erlang/usr/include/
Undefined symbols for architecture x86_64:
  "_enif_make_string", referenced from:
      _hello in ccXfh0oG.o
ld: symbol(s) not found for architecture x86_64
collect2: ld returned 1 exit status

I've also tried this with -m32 but it says there's no i386 architecture either.

Thanks!

Upvotes: 7

Views: 1510

Answers (3)

butter71
butter71

Reputation: 2723

for 64-bit Erlang, the following works for me:

gcc -undefined dynamic_lookup -dynamiclib niftest.c -o niftest.so \
    -I /usr/local/Cellar/erlang/R14B02/lib/erlang/usr/include

Upvotes: 13

Lukas
Lukas

Reputation: 5327

Try using these flags when compiling your nif instead of -shared

-bundle -flat_namespace -undefined suppress

Upvotes: 1

user405725
user405725

Reputation:

It seems like your problem is not architecture but undefined symbol _enif_make_string, which means that you have to link with your enif library, whatever it is, using -l option. Also, it's been a long time since I built a shared library for OS X, but I think that the right flag to use is -dynamiclib and not -shared, and you don't have to have a space after -I.

Upvotes: 2

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