Add check for older NEON macro

#117 Merged
Repository
petewarden
Branch
default
Repository
eigen
Branch
default
Author
  1. petewarden
Reviewers
Description

Check for the macro ARM_NEON (with two underscores at the end) as well as __ARM_NEON. The second macro is correct according to the ARM language extensions specification, but historically the first one has been more common. Some older compilers (e.g. gcc v4.6 on a Beaglebone Black) only define the first, so without this patch NEON isn't enabled.

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