Check for m4

[Kamaljit Singh]

I have a configure created on linux but run on solaris.
The configure runs fine but if a Makefile is deemed out of
date and is redone then auto4mte bails out claiming /usr/bin/m4
needs to be version 1.4

Ofcourse there is no /usr/bin/m4 on my system and /usr/local/bin/m4 is
version 1.4. I can work around by setting M4=/usr/local/bin/m4 in my 
environment.
but is there a "better" way using some autoconf macros to get this done ?

kamaljit



       
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