Makefile and shell loop

[Federico Bruni]

Hi all

Once again I have a problem with a loop within a Makefile.
I followed the example in the Usage manual, so I have these variables 
defined:

CPU_CORES=`cat /proc/cpuinfo | grep -m1 "cpu cores" | sed s/".*: "//`

LILY_CMD = lilypond -ddelete-intermediate-files \
--include=/home/fede/Documenti/spartiti/ly \
-dno-point-and-click -djob-count=$(CPU_CORES)

Then I have a for loop:

.PHONY: libri
libri:
        for f in *.lybook; do $(LILY_CMD) $$f; done


where $(CPU_CORES) is treated as a string, instead of being executed in 
the shell:

$ make
for f in *.lybook; do lilypond -ddelete-intermediate-files 
--include=/home/fede/Documenti/spartiti/ly -dno-point-and-click 
-djob-count=`cat /proc/cpuinfo | grep -m1 "cpu cores" | sed s/".*: "//` 
$f; done
GNU LilyPond 2.19.51

The files are created correctly, but I guess that it's not using the 
desired number of cores.

Thanks in advance
Federico