When set to use icc, CPPFLAGS gets set to the combined icc and gcc options. When not set to use icc, CPPFLAGS gets neither set of options. The result is that for GCC users, their CFLAGS are ignored and Povray will run excessively slowly. Most likely ICC users will find it doesn't compile at all. :-) The fix is to insert an 'else' just before the GCC flags are added to Makefile.sed. Reproducible: Always Steps to Reproduce: 1. 2. 3.
Fixed, thanks.