how to install SortMeRNA on mac os x 10.8.5

I download SortMeRNA from http://bioinfo.lifl.fr/RNA/sortmerna/. However, when I do

./configure
make

I got error:

src/paralleltraversal.cpp:18:10: fatal error: 'omp.h' file not found
#include 
         ^
1 error generated.

Then I tried to use a different gcc.
Do:

sudo port selfupdate
sudo port install gcc48
sudo port install openmpi

After that Do:

./configure CC=/opt/local/bin/gcc-mp-4.8 CXX=g++-mp-4.8
make
sudo make install

And I got:

qiuworld$ which sortmerna
/usr/local/bin/sortmerna
qiuworld$ sortmerna --version

  SortMeRNA version 1.9, 30/08/2013

  30/08/2013 - fixed bug for naming output log file
             - modified merge-paired-reads.sh to work on a cluster
  13/05/2013 - fixed bug to detect last (rRNA) read in fastq file
             - modified merge/unmerge-paired-reads.sh 
  05/04/2013 - changed to the usual 'configure, make, make install' (see the user manual v1.7) 
             - added 'merge-paired-reads.sh' and 'unmerge-paired-reads.sh' for 
               forward-reverse paired-end reads (see the user manual v1.7) 
             - fixed an integer overflow for mmap calculation for 32-bit
  26/02/2013 - changed sysconf library to sysctl for Mac OS
             - the sequence tag in the provided rRNA databases now follows the format:
               >[accession] [taxonomy] [length] 
  15/02/2013 - error for output of paired reads >1GB resolved
             - option -m added for specifying the amount of memory for loading reads
             - reads of length < L (default L=18) are automatically considered as non-rRNA
             - local timestamp added to --log statistics file
  06/02/2013 - reads up to 5000 nucleotides supported (Illumina or 454 technology)
             - AUTHORS file added to SortMeRNA directory
  24/01/2013 - L=20 error messages resolved 
             - I/O file checks modified 
             - Makefile updated for setting $SORTMERNADIR 
             - support for paired-end reads 
  04/01/2013 - input directory can be current without any path
  20/12/2012 - reads input files without an extension allowed