MFC r269956:

 From https://sourceware.org/ml/newlib/2014/msg00113.html
 By Richard Earnshaw at ARM
 >
 >GCC has for a number of years provides a set of pre-defined macros for
 >use with determining the ISA and features of the target during
 >pre-processing.  However, the design was always somewhat cumbersome in
 >that each new architecture revision created a new define and then
 >removed the previous one.  This meant that it was necessary to keep
 >updating the support code simply to recognise a new architecture being
 >added.
 >
 >The ACLE specification (ARM C Language Extentions)
 >(http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.set.swdev/index.html)
 >provides a much more suitable interface and GCC has supported this
 >since gcc-4.8.
 >
 >This patch makes use of the ACLE pre-defines to map to the internal
 >feature definitions.  To support older versions of GCC a compatibility
 >header is provided that maps the traditional pre-defines onto the new
 >ACLE ones.

 Stop using __FreeBSD_ARCH_armv6__ and switch to __ARM_ARCH >= 6 in the
 couple of places in tree. clang already implements ACLE. Add a define
 that says we implement version 1.1, even though the implementation
 isn't quite complete.

1 files changed, 3 insertions, 1 deletions

diff --git a/lib/msun/arm/fenv.c b/lib/msun/arm/fenv.c
index 2dd1933..16f1f48 100644
--- a/lib/msun/arm/fenv.c
+++ b/lib/msun/arm/fenv.c
@@ -30,7 +30,9 @@
 #define	__fenv_static
 #include "fenv.h"
 
-#if defined(__FreeBSD_ARCH_armv6__) || (defined(__ARM_ARCH) && __ARM_ARCH >= 6)
+#include <machine/acle-compat.h>
+
+#if __ARM_ARCH >= 6
 #define FENV_ARMv6
 #endif