On Tue, Nov 19, 2013 at 11:20:44AM +0900, YAMAMOTO Takashi wrote:
> > Having a single function that can do popcount() on any integer type is
> > easier for callers to get right.  The implementation is probably slower
> > if the caller actually provides a 32-bit (or shorter) integer, but the
> > only existing callers always provide a full 64-bit integer so this seems
> > unimportant for now.
> > 
> > This also restores use, in practice, of the optimized implementation of
> > population count.  (As the comment on popcount32() says, this version is
> > 2x faster than __builtin_popcount().)
> 
> this breaks NetBSD builds.
> 
> gcc -DHAVE_CONFIG_H -I.   -I ./include -I ./lib -I ./lib   
> -Wstrict-prototypes -Wall -Wextra -Wno-sign-compare -Wpointer-arith 
> -Wdeclaration-after-statement -Wno-format-zero-length -Wswitch-enum 
> -Wunused-parameter -Wstrict-aliasing -Wbad-function-cast -Wcast-align 
> -Wmissing-prototypes -Wmissing-field-initializers  -g -O2 -MT lib/aes128.o 
> -MD -MP -MF $depbase.Tpo -c -o lib/aes128.o lib/aes128.c &&\
> mv -f $depbase.Tpo $depbase.Po
> In file included from lib/aes128.c:29:0:
> lib/util.h:290:14: error: conflicting types for 'popcount'
> /usr/include/strings.h:57:14: note: previous declaration of 'popcount' was 
> here
> gmake[2]: *** [lib/aes128.o] Error 1

Oops.  Let's rename OVS's popcount then.  How about count_1bits?
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