Am 30.01.2013 18:46, schrieb Paolo Bonzini: > > ----- Messaggio originale ----- >> Da: "Stefan Weil" <s...@weilnetz.de> >> A: "Paolo Bonzini" <pbonz...@redhat.com> >> Cc: qemu-devel@nongnu.org, blauwir...@gmail.com, "peter maydell" >> <peter.mayd...@linaro.org> >> Inviato: Mercoledì, 30 gennaio 2013 18:36:52 >> Oggetto: Re: [Qemu-devel] [PATCH] bitops: unify bitops_ffsl with the one in >> host-utils.h >> >> Am 30.01.2013 17:53, schrieb Paolo Bonzini: >>> Fixes the build on Mac OS X, which has ffsl. >>> >>> Signed-off-by: Paolo Bonzini <pbonz...@redhat.com> >>> --- >>> include/qemu/bitops.h | 40 >>> ++++++++++++++-------------------------- >>> include/qemu/hbitmap.h | 2 +- >>> include/qemu/host-utils.h | 25 ------------------------- >>> util/hbitmap.c | 2 +- >>> 4 files changed, 16 insertions(+), 53 deletions(-) >>> >> This patch also fixes MinGW / MinGW-w64 builds which >> don't have a prototype declaration for ffsl. >> >> Tested-by: Stefan Weil <s...@weilnetz.de> >> >> Nevertheless I wonder why you don't use gcc's __builtin_ffsl. > Because I had no idea it existed until now. :) > Do you know what version of GCC introduced it? > > Paolo >
gcc.gnu.org/onlinedocs/gcc-3.3.6/gcc/Other-Builtins.html doesn't include it, but http://gcc.gnu.org/onlinedocs/gcc-3.4.6/gcc/Other-Builtins.html does. So I assume it was introduced by gcc-3.4.x. Stefan
