Export makefile variable with dollar sign - makefile

Question

I have two makefiles and I want to pass from Makefile1 a variable to Makefile2.
The problem is that this variable have a $ inside of it.
Here is the files:
# Makefile1
RPATH1 = 12\$$34
export RPATH1
all:
#echo RPATH1 "(Makefile1)" $(RPATH1)
#make -f Makefile2 RPATH2=$(RPATH1)
# Makefile2
all:
#echo RPATH1 "(Makefile2)" $(RPATH1)
#echo RPATH2 "(Makefile2)" $(RPATH2)
When I run it, I get:
$ make -f Makefile1
RPATH1 (Makefile1) 12$34
make[1]: Entering directory '/tmp/make'
RPATH1 (Makefile2) 124
RPATH2 (Makefile2) 124
make[1]: Leaving directory '/tmp/make'
I want to have a way to Makefile2 print 12$34 too.
What I may do?
Edit: I have discovered some way, but it's not very consistent. Usage in first Makefile is different than in second one.
# Makefile1
RPATH1 := '12$$$$34'
export RPATH1
all:
#echo RPATH1 "(Makefile1)" $(RPATH1)
#make -f Makefile2 RPATH2="$(RPATH1)"
#make -f Makefile2 RPATH2="'12\$$\$$34'"
# Makefile2
all:
#echo RPATH1a "(Makefile2)" $(value RPATH1)
#echo RPATH2a "(Makefile2)" $(RPATH2)
#echo RPATH2b "(Makefile2)" $(value RPATH2)
$ make -f Makefile1
RPATH1 (Makefile1) 12$$34
make[1]: Entering directory '/tmp/make'
RPATH1a (Makefile2) 12$$34
RPATH2a (Makefile2) 12151308134
RPATH2b (Makefile2) 12151308134
make[1]: Leaving directory '/tmp/make'
make[1]: Entering directory '/tmp/make'
RPATH1a (Makefile2) 12$$34
RPATH2a (Makefile2) 12$34
RPATH2b (Makefile2) 12$$34
make[1]: Leaving directory '/tmp/make'

Answer 1

Here's a solution for passing variables manually:
override quote = '$(subst ','"'"',$1)'
all:
#make -f Makefile2 RPATH2=$(call quote,$(value RPATH1))
Also, it's weird to see backslashes and quotes in Make variable definitions (in RPATH1).
Make itself ignores them, they're interpreted by the shell when printing the variable.
You might want to use $(info ) instead of echo, which doesn't escaping. Or use my $(call quote, ) when printing, to properly escape the contents.
Could you put a complete example?
Sure.
# Makefile1
RPATH1 = 12\$$34'
override quote = '$(subst ','"'"',$1)'
all:
$(info RPATH1 "(Makefile1)" $(RPATH1))
#make -f Makefile2 RPATH2=$(call quote,$(value RPATH1))
# Makefile2
all:
$(info RPATH2 "(Makefile2)" $(RPATH2))
#true
$ make -f Makefile1
RPATH1 "(Makefile1)" 12\$34'
make[1]: Entering directory '...'
RPATH2 "(Makefile2)" 12\$34'
make[1]: Leaving directory '...'