如何在makefile中打印出变量

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如何在makefile中打印出变量

@echo $(NDK_PROJECT_PATH)
@echo $(value NDK_PROJECT_PATH)

"build-local.mk:102: *** missing separator.  Stop."

myTarget: myDependencies
        @echo hi

all:
        @echo $(NDK_PROJECT_PATH)

export NDK_PROJECT_PATH=/opt/ndk/project
make -n

echo /opt/ndk/project

all
    @echo NDK_PROJECT_PATH=$(NDK_PROJECT_PATH)
done:
        @echo "All done"

print-%  : ; @echo $* = $($*)

make print-VARIABLE

VARIABLE = the_value_of_the_variable

dispvar = echo $(1)=$($(1)) ; echo
.PHONY: vars
vars:
    @$(call dispvar,SOMEVAR1)
    @$(call dispvar,SOMEVAR2)

# if the first command line argument is "print"
ifeq ($(firstword $(MAKECMDGOALS)),print)
  # take the rest of the arguments as variable names
  VAR_NAMES := $(wordlist 2,$(words $(MAKECMDGOALS)),$(MAKECMDGOALS))
  # turn them into do-nothing targets
  $(eval $(VAR_NAMES):;@:))
  # then print them
  .PHONY: print
  print:
          @$(foreach var,$(VAR_NAMES),\
            echo '$(var) = $($(var))';)
endif

$ make print CXXFLAGS
CXXFLAGS = -g -Wall

all: do-something
TESTS=
TESTS+='a'
TESTS+='b'
TESTS+='c'
do-something:
        @echo "doing something"
        @echo "running tests $(TESTS)"
        @exit 1

NDK_PROJECT_PATH := some_value

如何在makefile中打印出变量

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