save AT_HWCAP from auxv for subsequent use in machine-specific code

it's expected that this will be needed/useful only in asm, so I've
given it its own symbol that can be addressed in pc-relative ways from
asm rather than adding a field in the __libc structure which would
require hard-coding the offset wherever it's used.

1 files changed, 2 insertions, 0 deletions

diff --git a/src/internal/libc.c b/src/internal/libc.c
index c1e21ca0..004c1a33 100644
--- a/src/internal/libc.c
+++ b/src/internal/libc.c
@@ -13,3 +13,5 @@ struct __libc __libc;
 #ifdef BROKEN_VISIBILITY
 __asm__(".hidden __libc");
 #endif
+
+size_t __hwcap;