cmake: define ARM var for all ARM arch variants

This is refactoring only. No behavior change.

CMakeLists.txt

@@ -58,16 +58,20 @@ if (NOT ARCH OR ARCH STREQUAL "" OR ARCH STREQUAL "native" OR ARCH STREQUAL "def
 else()
   set(ARCH_ID "${ARCH}")
 endif()
-string(SUBSTRING ${ARCH_ID} 0 5 ARM_TEST)
-string(TOLOWER ${ARM_TEST} ARM_TEST)
-if (${ARM_TEST} STREQUAL "armv6")
-  set(ARM6 1)
-endif()
-if (${ARM_TEST} STREQUAL "armv7")
-  set(ARM7 1)
+string(TOLOWER ${ARCH_ID} ARM_ID)
+string(SUBSTRING ${ARCH_ID} 0 3 ARM_TEST)
+if (ARM_TEST STREQUAL "arm")
+  set(ARM 1)
+  string(SUBSTRING ${ARCH_ID} 0 5 ARM_TEST)
+  if (ARM_TEST STREQUAL "armv6")
+    set(ARM6 1)
+  endif()
+  if (ARM_TEST STREQUAL "armv7")
+    set(ARM7 1)
+  endif()
 endif()
 
-if(WIN32 OR ARM7 OR ARM6)
+if(WIN32 OR ARM)
   set(OPT_FLAGS_RELEASE "-O2")
 else()
   set(OPT_FLAGS_RELEASE "-Ofast")
@@ -247,7 +251,7 @@ add_definitions("-DBLOCKCHAIN_DB=${BLOCKCHAIN_DB}")
 find_package(Libunwind)
 # Can't install hook in static build on OSX, because OSX linker does not support --wrap
 # On ARM, having libunwind package (with .so's only) installed breaks static link.
-if(LIBUNWIND_FOUND AND NOT (STATIC AND (APPLE OR ARM6 OR ARM7)))
+if(LIBUNWIND_FOUND AND NOT (STATIC AND (APPLE OR ARM)))
   set(DEFAULT_STACK_TRACE ON)
 else()
   set(DEFAULT_STACK_TRACE OFF)
@@ -321,7 +325,7 @@ else()
   endif()
   if(CMAKE_C_COMPILER_ID STREQUAL "Clang")
     set(WARNINGS "${WARNINGS} -Wno-deprecated-register -Wno-error=mismatched-tags -Wno-error=null-conversion -Wno-overloaded-shift-op-parentheses -Wno-error=shift-count-overflow -Wno-error=tautological-constant-out-of-range-compare -Wno-error=unused-private-field -Wno-error=unneeded-internal-declaration")
-    if(ARM6 OR ARM7)
+    if(ARM)
       set(WARNINGS "${WARNINGS} -Wno-error=inline-asm")
     endif()
   else()
@@ -358,11 +362,11 @@ else()
 
   option(NO_AES "Explicitly disable AES support" ${NO_AES})
 
-  if(NOT NO_AES AND NOT (ARM6 OR ARM7))
+  if(NOT NO_AES AND NOT ARM)
     message(STATUS "AES support enabled")
     set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -maes")
     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -maes")
-  elseif(ARM7 OR ARM6)
+  elseif(ARM)
     message(STATUS "AES support disabled (not available on ARM)")
   else()
     message(STATUS "AES support disabled")