llvm-gcc42 port installs an error in omp.h

[john.ehrlinger@…]

This came up while installing an R package that uses the OpenMP framework. The package requires autoconf to be installed. Clean install of MacPorts with only autoconf with XCode V5.0.1 on OS X 10.8

Works expected with ./configure with OpenMP support.

Install the llvm-gcc42 port and configure fails with

checking for llvm-gcc-4.2 -arch x86_64 -std=gnu99 option to accept ISO C89... none needed
checking for llvm-gcc-4.2 -arch x86_64 -std=gnu99 option to support OpenMP... unsupported
configure: WARNING: OpenMP does NOT appear to be supported on this system.
configure: creating ./config.status

The log file indicates:

configure:2614: llvm-gcc-4.2 -arch x86_64 -std=gnu99 -o conftest -mtune=core2 -g -O2   conftest.c  >&5
conftest.c:11: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'me'
In file included from conftest.c:13:
/opt/local/lib/llvm-gcc42/gcc/i686-apple-darwin12/4.2.1/include/omp.h:68: error: expected ')' before '*' token
/opt/local/lib/llvm-gcc42/gcc/i686-apple-darwin12/4.2.1/include/omp.h:69: error: expected ')' before '*' token
/opt/local/lib/llvm-gcc42/gcc/i686-apple-darwin12/4.2.1/include/omp.h:70: error: expected ')' before '*' token
/opt/local/lib/llvm-gcc42/gcc/i686-apple-darwin12/4.2.1/include/omp.h:71: error: expected ')' before '*' token
/opt/local/lib/llvm-gcc42/gcc/i686-apple-darwin12/4.2.1/include/omp.h:72: error: expected ')' before '*' token
configure:2614: $? = 1
configure: failed program was:

I've attached the config.log file.

[john.ehrlinger@…]

Configure log detailing the omp.h error reported