[Linux/Unix] Problems with libpgmp.so, libpgc.so

This is very strange that how come PGI group's libs get into system applications?

ldd /usr/sbin/sshd | grep opt
      libz.so.1 => /opt/local/zlib/lib/libz.so.1 (0x00002b67071e8000)
      libpgmp.so => /opt/pgi/linux86-64/11.10/libso/libpgmp.so (0x00002b6708a88000)
      libpgc.so => /opt/pgi/linux86-64/11.10/libso/libpgc.so (0x00002b6708e46000)