allow DEVMEMD=1 build on non-Arm

makefile-arch.inc

@@ -19,12 +19,25 @@
 #
 # Architecture and cross compile tests for makefiles
 #
+# There are three architectures involved:
+#
+#   PLAT_ARCH    - the architecture we are on now: the build platform;
+#                  when cross-compiling, this could be anything
+#
+#   ARCH         - the architecture of the CSAL binaries:
+#                  this will be arm or arm64, except in the case that
+#                  DEVMEMD=1 when it could be anything
+#
+#   target arch  - this will be an Arm architecture of some kind,
+#                  and will be the same as ARCH except when DEVMEMD=1
+#
 
 # figure platform arch
 ifndef PLAT_ARCH
 PLAT_ARCH := $(shell uname -m 2>/dev/null || echo not)
 endif
 
+ifneq ($(DEVMEMD),1)
 ifeq ($(PLAT_ARCH),$(filter $(PLAT_ARCH), x86 x86_64 ))
 ifeq ($(CROSS_COMPILE), )
 $(error no CROSS_COMPILE set on x86 platform)
@@ -33,12 +46,17 @@ ifeq ($(ARCH), )
 $(error no arm target ARCH set on x86 platform)
 endif
 endif
+endif
 
 # set build arch - default to arm
 ifndef ARCH
+ifneq ($(DEVMEMD),1)
 ifeq ($(PLAT_ARCH),$(filter $(PLAT_ARCH), aarch64 arm64 ))
 ARCH=arm64
 else
 ARCH=arm
 endif
+else
+ARCH=$(PLAT_ARCH)
+endif
 endif