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crubymkmfruby-c-extension

mkmf ignores files in sub-folders when it compiles the C extension

I'd like to organize the C source code like this:

+ /
|
|___ + ext
|    |
|    |___ + native_extension
|         |
|         |___ + lib
|         |    |
|         |    |___ (Source files are kept in here - may contain sub-folders)
|         |
|         |___ native_extension.c
|         |___ native_extension.h
|         |___ extconf.rb
|
|___ + lib
|    |
|    |___ (Ruby source code)
|
|___ Rakefile

I'm having trouble getting this setup to work correctly with mkmf. The files in native_extension/lib, which are included by native_extension.c, are being completely ignored.

When I build the extension, only native_extension.{h,c} are compiled, and I get an incomplete native_extension.{so,dll} that gives me symbol lookup errors when I try to run it.

Any way to make this work?

Solution

  • While you can pass a second argument to make_makefile to specify a different source directory (e.g., make_makfile('native_extension', 'lib')), that would cause it not to include your native_extension.c file. Looking at the source for mkmf.rb, it doesn't appear there's any way to make it look in both places short of rewriting the generated Makefile yourself.