I had this configure error while building PostgreSQL on Solaris 10:


Looking at config.log it was apparent that when configure tried to run conftest it failed to load libreadline.so.5. I had libreadline.so.5 under /usr/local/lib, so I made a symlink to it under /usr/lib and that solved the problem.

Maybe there's another way to tell conftest to look for libreadline.so.5 under /usr/local/lib?