使用 make 创建文件失败，但可以使用 Eclispe

Question

我正在尝试使用 bash 运行 makefile，该文件通常在 Mac 上使用 Eclispe 运行。该文件是：

#Project variables for prebuild.h
PROJECT_NAME := myproject
VARIANT := RELEASE

#Create prebuild.h file
CREATE_FILE := $(shell echo "/* Generated file. Do not edit. *//" > ../prebuild.h)
CREATE_FILE := $(shell echo "#define PROJECT_NAME \""$(PROJECT_NAME)"\"" >> ../prebuild.h)
CREATE_FILE := $(shell echo "#define VARIANT \""$(VARIANT)"\"" >> ../prebuild.h)
CREATE_FILE := $(shell echo "#define $(VARIANT) \""$(VARIANT)"\"" >> ../prebuild.h)

我收到的错误如下：

bash-3.2$ make
../makefile.defs:7: *** unterminated call to function `shell': missing `)'.  Stop.

它可以在 Mac 上的 Eclispe 上运行，为什么不能在 bash 上运行？

Answer 1

你必须转义 shell 宏内的哈希值：

#Create prebuild.h file
$(shell echo "/* Generated file. Do not edit. *//" > ../prebuild.h)
$(shell echo "\#define PROJECT_NAME \""$(PROJECT_NAME)"\"" >> ../prebuild.h)
$(shell echo "\#define VARIANT \""$(VARIANT)"\"" >> ../prebuild.h)
$(shell echo "\#define $(VARIANT) \""$(VARIANT)"\"" >> ../prebuild.h)

（注意：不需要

CREATE_FILE

变量）

当然，这最好作为规则来写（做这种事情就是 make 的目的......）：

prebuild.h:
    @echo "/* Generated file. Do not edit. *//" > $@
    @echo "#define PROJECT_NAME \""$(PROJECT_NAME)"\"" >> $@
    @echo "#define VARIANT \""$(VARIANT)"\"" >> $@
    @echo "#define $(VARIANT) \""$(VARIANT)"\"" >> $@