Gentoo uses armv7a-hardfloat-linux-gnueabi- as cross compiler prefix.
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
export HOST_ARCH=$(HOST_ARCH_X86)
else ifneq (,$(findstring $(MK_ARCH), "aarch64" "armv8l"))
export HOST_ARCH=$(HOST_ARCH_AARCH64)
-else ifneq (,$(findstring $(MK_ARCH), "arm" "armv7" "armv7l"))
+else ifneq (,$(findstring $(MK_ARCH), "arm" "armv7" "armv7a" "armv7l"))
export HOST_ARCH=$(HOST_ARCH_ARM)
else ifeq ("riscv32", $(MK_ARCH))
export HOST_ARCH=$(HOST_ARCH_RISCV32)