Definition of BOOST_ARCH_ARM does not check __aarch64__

[Sergey Shestakov <s_shestakov@…>]

Hi

In this header file http://www.boost.org/doc/libs/1_63_0/boost/predef/architecture/arm.h macros aarch64 should be checked along with arm64 Without that we get problems when building with Android NDK for arm 64, because BOOST_ARCH_ARM is not defined.

Thanks Sergey

[Sergey Shestakov <s_shestakov@…>]

__aarch64__ should be checked along with __arm64

[James E. King, III]

Something like this should help - I was going to submit a pull request on github however it looks like there's quite a bit more that needs to be done here including detecting the difference between 32-bit and 64-bit (unless the architecture/) is doing that; and also the major and minor version of ARM should be updated to include 8.1A, 8.2A, 8.3A in all the ways the different compilers express it.

diff --git a/include/boost/predef/architecture/arm.h b/include/boost/predef/architecture/arm.h
index 76f9f94..e785304 100644
--- a/include/boost/predef/architecture/arm.h
+++ b/include/boost/predef/architecture/arm.h
@@ -21,6 +21,7 @@ http://www.boost.org/LICENSE_1_0.txt)
 [table
     [[__predef_symbol__] [__predef_version__]]

+    [[`__aarch64__`] [__predef_detection__]]
     [[`__arm__`] [__predef_detection__]]
     [[`__arm64`] [__predef_detection__]]
     [[`__thumb__`] [__predef_detection__]]
@@ -39,11 +40,11 @@ http://www.boost.org/LICENSE_1_0.txt)

 #define BOOST_ARCH_ARM BOOST_VERSION_NUMBER_NOT_AVAILABLE

-#if defined(__arm__) || defined(__arm64) || defined(__thumb__) || \
+#if defined(__aarch64__) || defined(__arm__) || defined(__arm64) || defined(__thumb__) || \
     defined(__TARGET_ARCH_ARM) || defined(__TARGET_ARCH_THUMB) || \
     defined(_M_ARM) || defined(_M_ARM64)
 #   undef BOOST_ARCH_ARM
-#   if !defined(BOOST_ARCH_ARM) && defined(__arm64)
+#   if !defined(BOOST_ARCH_ARM) && (defined(__arm64) || defined(__aarch64__))
 #       define BOOST_ARCH_ARM BOOST_VERSION_NUMBER(8,0,0)
 #   endif
 #   if !defined(BOOST_ARCH_ARM) && defined(__TARGET_ARCH_ARM)

I'd recommend moving this issue to github so it gets more exposure.