无法从 Makefile 调用函数

Question

我需要从 make 目标调用一个函数，这个函数会被调用多次，

define generate_file
if [ "${RQM_SETUP}" = "ci" ]; then
    echo "" > $(2).txt
else
    echo "It is Not Setup";
fi
endef
all:
        $(call generate_file,John Doe,101)
        $(call generate_file,Peter Pan,102)

现在我陷入了这个错误：

bash-5.0# make
if [ "" = "ci" ]; then
/bin/sh: syntax error: unexpected end of file (expecting "fi")
make: *** [Makefile:10: all] Error 2

Answer 1

您的函数是多行的，它将尝试作为单独的 shell 调用执行。这将失败，因为任何单行本身在语法上都不正确。您可以通过在一行中设置它来使其工作，即：

$ cat Makefile
define generate_file
if [ "${RQM_SETUP}" = "ci" ]; then \
    echo "" > $(2).txt; \
else \
    echo "It is Not Setup"; \
fi
endef
all:
        $(call generate_file,John Doe,101)
        $(call generate_file,Peter Pan,102)

输出：

$ make
if [ "" = "ci" ]; then echo "John Doe" > 101.txt; else echo "It is Not Setup"; fi
It is Not Setup
if [ "" = "ci" ]; then echo "Peter Pan" > 102.txt; else echo "It is Not Setup"; fi
It is Not Setup

无法从 Makefile 调用函数

Unable to call function from a Makefile

shell

makefile

gnu-make