Mac OS X build error: conflicting types for 'kconf_id_lookup'

[aifer2007]

environment:
Mac OS X 10.11.6

errors:

In file included from zconf.tab.c:237:
./zconf.hash.c:167:1: error: conflicting types for 'kconf_id_lookup'
kconf_id_lookup (register const char *str, register size_t len)
^
./zconf.hash.c:34:31: note: previous declaration is here
static const struct kconf_id *kconf_id_lookup(register const char *str, register unsigned int len);
^
1 error generated.
make: *** [zconf.tab.o] Error 1
make: *** [build-lib-kconfig] Error 2
make: *** [build] Error 2
make[1]: *** [_ct-ng] Error 2
make: *** [crosstool-NG/ct-ng] Error 2

[ghost]

I get the same error on macOS 10.12.2.

[aifer2007]

my Xcode : Version 8.2.1 (8C1002)

[ghost]

It might have something to do with a recent update to gperf a few days ago after having 8 years of no updates.
Been trying to find a way to install the previous version using brew but no luck so far.
Just uninstalling the brew version of gperf (3.1) and let the OSX version (3.0.3) take over seems to do the trick.

[aifer2007]

@Dennis-Janssen

or，you can install macports, and use

$ sudo port install git gsed gawk binutils gperf grep gettext py-serial wget libtool autoconf automake

instead of :

$ brew install binutils coreutils automake wget gawk libtool help2man gperf gnu-sed --with-default-names grep

It works well!

Reference:

#11

[rversteegen]

Fixed upstream:
crosstool-ng/crosstool-ng#528