Mac で Android ビルドエラー

Android

MacPorts の bison 2.4.1 だとエラー

$ make
build/core/product_config.mk:211: WARNING: adding test OTA key
============================================
TARGET_PRODUCT=generic
TARGET_BUILD_VARIANT=eng
TARGET_SIMULATOR=
TARGET_BUILD_TYPE=release
TARGET_ARCH=arm
HOST_ARCH=x86
HOST_OS=darwin
HOST_BUILD_TYPE=release
BUILD_ID=
============================================
build/core/main.mk:180: implicitly installing apns-conf_sdk.xml
build/core/copy_headers.mk:15: warning: overriding commands for target `out/target/product/generic/obj/include/libpv/getactualaacconfig.h'
build/core/copy_headers.mk:15: warning: ignoring old commands for target `out/target/product/generic/obj/include/libpv/getactualaacconfig.h'
WebCore Yacc: libwebcore <= external/webkit/WebCore/css/CSSGrammar.y
external/webkit/WebCore/css/CSSGrammar.y:348.11-20: シンボル maybe_sgml が再定義されました
make: *** [out/target/product/generic/obj/SHARED_LIBRARIES/libwebcore_intermediates/WebCore/CSSGrammar.cpp] Error 1
$ which bison
/opt/local/bin/bison
$ bison -V
bison (GNU Bison) 2.4.1

Leopard 標準の bison 2.3 を使って回避（PATH設定を変更した）

$ which bison
/usr/bin/bison
$ bison -V
bison (GNU Bison) 2.3