aclocal.m4: narrow down 'riscv*' to 'riscv-*' and 'riscv32*'

Authored by trofi on Jul 17 2018, 2:01 PM.

Description

aclocal.m4: narrow down 'riscv*' to 'riscv-*' and 'riscv32*'

Two minor changes:

  • 32-bit CPU macro is called riscv32_HOST_ARCH (was riscv_HOST_ARCH)
  • shrink understood tuples from riscv* to riscv-* and riscv32*-* as a tiny safeguard against riscv128*- in future.

Suggested-by: James Clarke <jrtc27@jrtc27.com>
Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>