[R] ELF file OS ABI invalid yes?????

[vittorio]

Compilation of MCMCpack under freebsd 6.2 i386 fails because of the following 
cryptic error: 

* Installing *source* package 'MCMCpack' ...
checking for C++ compiler default output file name... a.out
checking whether the C++ compiler works... yes
checking whether we are cross compiling... no
checking for suffix of executables...
checking for suffix of object files... o
checking whether we are using the GNU C++ compiler... grep: error while 
loading shared libraries: /usr/local/lib/libpcre.so.0: ELF file OS ABI 
invalid
yes
checking whether c++ accepts -g... grep: error while loading shared 
libraries: /usr/local/lib/libpcre.so.0: ELF file OS ABI invalid
yes

What should I do?

Ciao
Vittorio