# TODO(go): Fix
MAKEVER:=$(shell make --version | ruby -n0e 'puts $$_[/Make (\d)/,1]')
all: a.h.x a.c.x a.h.z a.c.z b.h.x b.c.x b.h.z b.c.z
a.h.%:
echo twice $@
a.c.%:
echo twice $@
b.h.% b.c.%:
echo once $@
b.h.z: pass
# GNU make 4 invokes this rule.
ifeq ($(MAKEVER,3))
b.c.z: fail
endif
pass:
echo PASS
fail:
echo FAIL