gcc fails to build: math/gmp does not exist

[Eitan Adler]

Debug output:

# pwd
/usr/ports/lang/gcc46

# make
===>   gcc-4.6.0.20100501 depends on file: /usr/local/bin/as - found
===>   gcc-4.6.0.20100501 depends on executable: zip - found
===>   gcc-4.6.0.20100501 depends on executable: gmake - found
===>   gcc-4.6.0.20100501 depends on executable: bison - found
===>   gcc-4.6.0.20100501 depends on file: /usr/local/bin/perl5.10.1 - found
===>   gcc-4.6.0.20100501 depends on shared library: gmp.10grep:
conflicting matchers specified
 - not found
===>    Verifying install for gmp.10 in /usr/ports/math/gmp
===>   Returning to build of gcc-4.6.0.20100501
grep: conflicting matchers specified
Error: shared library "gmp.10" does not exist
*** Error code 1

#pkg_info |grep gmp
gmp-5.0.1           A free library for arbitrary precision arithmetic