disable host build for non-Linux buildsystems

mk/host-bottom.mk

@@ -103,5 +103,7 @@ endif
 ${_HOST_COOKIE}:
 	exec ${MAKE} hostpackage
 
+ifeq ($(HOST_LINUX_ONLY),)
 hostpackage: ${ALL_HOSTDIRS}
 	touch ${_HOST_COOKIE}
+endif

package/alsa-lib/Makefile

@@ -23,6 +23,7 @@ $(eval $(call HOST_template,ALSA_LIB,alsa-lib,${PKG_VERSION}-${PKG_RELEASE}))
 $(eval $(call PKG_template,ALSA_LIB,alsa-lib,${PKG_VERSION}-${PKG_RELEASE},${PKG_DEPENDS},${PKG_DESCR},${PKG_SECTION},${PKG_OPTS}))
 
 HOST_STYLE:=		auto
+HOST_LINUX_ONLY:=	1
 TARGET_CPPFLAGS+=	-D_POSIX_C_SOURCE=1
 CONFIGURE_ARGS+=	--disable-python