Hi, everyone, I just upgraded to a brand new version of Autoconf (2.59) and 'configure' is now failing where it previously did not. Specifically, it is unable to verify the presence of any of the ANSI C header files. 'config.log' looks like this: <quote> configure:3395: checking for sys/stat.h configure:3411: [compilation line, which I verified works] >&5 configure:3417: $? = 0 configure:3421: test -z || test ! -s conftest.err configure:3424: $? = 0 configure:3427: test -s conftest. configure:3430: $? = 1 </quote> What I'm guessing here is that the statement in 'configure' at line 3427 is malformed: I think that the file that should be checked is 'conftest.o'. In 'configure', this file is referred to as 'conftest.$ac_objext'. So, if I'm right, that means that the variable 'ac_objext' isn't properly being set. However, I can't imagine why. Can anyone help me solve this problem? Thanks, Scott