最初是这样定义的，咋看没问题

DT_VERSION = 5.1.0
ifeq ($(shell which git), )
	DT_BACKEND_VERSION = $(DT_VERSION)
else
	DATE = $(shell date "+%m/%d/%Y")
	GIT_VERSION = $(shell git rev-parse HEAD | cut -c 1-8)
	DT_BACKEND_VERSION = $(DT_VERSION)-$(GIT_VERSION) (Built on $(DATE))
endif
CXXFLAGS += -DDT_VERSION="$(DT_VERSION)" \
			-DDT_BACKEND_VERSION="$(DT_BACKEND_VERSION)"

make就报错

修改为（只有最后两行不同）

DT_VERSION = 5.1.0
ifeq ($(shell which git), )
	DT_BACKEND_VERSION = $(DT_VERSION)
else
	DATE = $(shell date "+%m/%d/%Y")
	GIT_VERSION = $(shell git rev-parse HEAD | cut -c 1-8)
	DT_BACKEND_VERSION = $(DT_VERSION)-$(GIT_VERSION) (Built on $(DATE))
endif
CXXFLAGS += -DDT_VERSION="\"$(DT_VERSION)\"" \
			-DDT_BACKEND_VERSION="\"$(DT_BACKEND_VERSION)\""

 仔细比较后就知道坑在哪里