http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46155
--- Comment #2 from Dr. David Kirkby <david.kirkby at onetel dot net> 2010-10-24 03:54:48 UTC --- Created attachment 22139 --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=22139 Header file created by gcc. Stored at /opt/pware/lib/gcc/powerpc-ibm-aix5.3.0.0/4.2.4/include/float.h Note how this file contains no reference to fprnd_t. The causes the GNU Scientific library (GSL) to fail to compile unless one hacks a file in the GNU Scientific library.