Disabling libcms2 on unix

[drunkensapo]

Dear all,
I'm doing some experiments regarding compilation on iOS, but my question is rather general. I'm trying to disable lcms2, and passed the argument --without-lcms2, but when compiling it still tries to link against it (and thus fails). Am I missing something here?
Here is my setup:

*ImageMagick 6.8.9-7
*clang Apple LLVM version 5.1 (clang-503.0.40) (based on LLVM 3.4svn)
Target: x86_64-apple-darwin13.3.0
Thread model: posix
*delegates (from magick’s ftp):
**libpng: 1.6.13
**libtiff: 4.0.3
**libjpeg: 9a

Thanks in advance.
Best regards,
Juan