Make file echo displaying "$PATH" string

I am trying to force make file to display next string:

"Please execute next commands:
setenv PATH /usr/local/greenhills/mips5/linux86:$PATH"

The problem is with "$PATH". Command

@echo "setenv PATH /usr/local/greenhills/mips5/linux86:$PATH"

cause a result

"setenv PATH /usr/local/greenhills/mips5/linux86:ATH"

any combinations of escape characters, quotes, "$(shell ech开发者_如何学Pythono " didn't get required results...

Any suggestions?

---

In the manual for GNU make, they talk about this specific example when describing the value function:

The value function provides a way for you to use the value of a variable without having it expanded. Please note that this does not undo expansions which have already occurred; for example if you create a simply expanded variable its value is expanded during the definition; in that case the value function will return the same result as using the variable directly.

The syntax of the value function is:

 $(value variable)

Note that variable is the name of a variable; not a reference to that variable. Therefore you would not normally use a ‘$’ or parentheses when writing it. (You can, however, use a variable reference in the name if you want the name not to be a constant.)

The result of this function is a string containing the value of variable, without any expansion occurring. For example, in this makefile:

 FOO = $PATH

 all:
         @echo $(FOO)
         @echo $(value FOO)

The first output line would be ATH, since the “$P” would be expanded as a make variable, while the second output line would be the current value of your $PATH environment variable, since the value function avoided the expansion.

---

The make uses the $ for its own variable expansions. E.g. single character variable $A or variable with a long name - ${VAR} and $(VAR).

To put the $ into a command, use the $$, for example:

all:
  @echo "Please execute next commands:"
  @echo 'setenv PATH /usr/local/greenhills/mips5/linux86:$$PATH'

Also note that to make the "" and '' (double and single quoting) do not play any role and they are passed verbatim to the shell. (Remove the @ sign to see what make sends to shell.) To prevent the shell from expanding $PATH, second line uses the ''.

---

Tricky

Makefile snippet - on how to print and how to use

CURRENTDIR =  $(shell pwd)
PARENTDIR = $(shell dirname $(CURRENTDIR))
#HOME =  $${HOME} No need of this
#PATH = $${PATH} or this

test:
    $(info  HOME is  $(value HOME) PATH is $(value PATH))
    $(info  HOME is  $(HOME) PATH is $(PATH))
    -$(shell unzip xx.zip -d $(HOME)/.local)
    $(export PATH := $(PATH):$(HOME)/.local/bin)

Output

make test

HOME is  /home/alex PATH is /home/alex/.local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin:/snap/bin:/usr/lib/cuda/bin:/usr/local/go/bin
HOME is  /home/alex PATH is /home/alex/.local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin:/snap/bin:/usr/lib/cuda/bin:/usr/local/go/bin