Problem: Combining code that is compiled with -Ofast with code that
is not results in inconsistent behaviour
Fix By: Compiling everything with -Ofast
Waive If: The application does not use maths functions
Example: FAIL: fast test because some parts of the program were compiled with -Ofast and some were not.
This test checks that if part of the application was compiled with the -Ofast option, then all of it was compiled with this option. If only some parts are compiled with -Ofast then the parts that are not may not behave correctly as they will be expecting to receive accurate results from mathematical functions. For more details on this problem see: https://bugzilla.redhat.com/show_bug.cgi?id=1248744
If necessary the test can be disabled via the --skip-fast option and re-enabled via the --test-fast option.