tree f436a93bdf2da70196d94d58632fec3ffb58b112
parent 52fc78baf216dac4e76c5eb3bd940f68e87086da
author Mark Adler <madler@alumni.caltech.edu> 1550465153 -0800
committer Mark Adler <madler@alumni.caltech.edu> 1550465369 -0800

Use ARM crc32 instructions if the ARM architecture has them.

The ARM crc32 instructions will be used only if an architecture is
explicitly specified at compile time that has those instructions.
For example, -march=armv8.1-a or -march=armv8-a+crc, or if the
machine being compiled on has the instructions, -march=native.