Commit b4aa5dc8 authored by Committed by Jean-Marc Valin
Reorganize configure's detection of intrinsics functions:
Actually try to compile intrinsics rather than using the output of --help. Allow caller of configure script to set custom compiler options to enable intrinsics. Detect when intrinsics are always available, without needing special compiler options. Make naming of #defines for detected intrinsics support more systematic.
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