topic Re: Make: infinitely recursive macro in Operating System - HP-UX

Make: infinitely recursive macro

Speedware — Wed, 01 Dec 2004 15:24:43 GMT

Hello,

I am trying to do the following in a makefile
I want to know if the following is valid because it work on hpux 11.00 but not on hpux 11.11 or 11.22. I am getting the following error:
Make: infinitely recursive macro?. Stop.

PATH=/home/speedware:${PATH}
all: test
test:

Because I want to add directory to the Environment variable PATH in my makefile
How would I do that ? (if its possibable )

Re: Make: infinitely recursive macro

Manish Srivastava — Thu, 02 Dec 2004 08:12:11 GMT

Hi,

This is not allowed. This fails as PATH is not defined before substitution.

manish

Re: Make: infinitely recursive macro

Steve Steel — Thu, 02 Dec 2004 09:02:46 GMT

Hi

Indeed

PATH is defined as itself. Thus making this an "infinitely recursive
macro", which cannot be expanded, so the make operation fails.

PATH=/home/speedware:$PATH is probably what you mean

Steve Steel

Re: Make: infinitely recursive macro

Speedware — Thu, 02 Dec 2004 09:41:02 GMT

But what I find weird is that it use to work on hpux 11.00 ???

Does anyone know if something was fix at one point in make ?

Also
PATH=/home/speedware:$PATH does not work since Make report $P as the variable and ATH as incorrect variable.

Re: Make: infinitely recursive macro

Ermin Borovac — Thu, 02 Dec 2004 18:07:04 GMT

Not sure if this used to work on 11.00, but if you use GNU make and define your variable with ':=' it should work the way you wanted it to.

PATH := /home/speedware:${PATH}

Re: Make: infinitely recursive macro

Speedware — Thu, 02 Dec 2004 18:10:54 GMT

Thanks for the tips.

That work in GNU make. The only problem is the fact that we are linking our product at installation time. I need a standard way of doing this so its going to work on all platform without depending on extra software.

Re: Make: infinitely recursive macro

A. Clay Stephenson — Thu, 02 Dec 2004 19:45:39 GMT

Your PATH macro is definitely infinitely recursive and you are relying on quirks of particular makes to work. A much more portable method would be something like this placed in all your makefiles.

PATH=`/usr/local/speedpath.sh`

The speedpath.sh command would do something like this:

#!/usr/bin/sh
PATH=/home/speedpath:${PATH}
echo ${PATH}
exit 0