include instruction question

[Kovalevich Victor]

Hi!
I have one question: can I use 'include' instruction in a make file that
is included by this instruction in an other make file. For example:

~/dir1/Makefile.inc:

#
# ~/dir1/Makefile.inc file body
ROOT=${HOME}

~/dir1/dir2/Makefile.inc:

#
 # ~/dir1/dir2/Makefile.inc file body
include ../Makefile.inc

~/dir1/dir2/dir3/makefile:

#
  # ~/dir1/dir2/dir3/makefile file body
 include ../Makefile.inc
usage:
    @ echo Root directory is ${ROOT}
 
when I launched make process in ~/dir/dir2/dir2 directory I got following
messages:

../Makefile.inc:3: ../Makefile.inc: Too many open files
Root directory is

that means ROOT variable was not defined. Is there a defect of make or did
I do any mistake ? Unfortunately I did not find any information about restriction
of 'include' instruction usage in make documentation. Can anyone explain
me this effect?

Thanks in advance.

-- 
Best regards, Kovalevich Victor
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