Good Morning!
I am writing because I have a problem with make.
The problem is if there exists rules generating some "object"-files from
one "source"-file with rules like:
my_clnt.c my_xdr.c my.h my_svc.c : my.x
rpcgen my.x
When using make -j rpcgen is executed IM PARALELL several times.
This was a minor problem some years ago but is really annoying with java where
it is normal to get more .class from one .java!
I really would be happy to use -j2 since there are 2 CPUs in my workstation
and there are about 400 java-files and 1200 class-files (yes, this number
is 3 times higher!) in my current project!
Are there any workarounds / undocumented options / ... ?
Thanks
Peter Kutschera
http://peter.kutschera.at
mailto:[EMAIL PROTECTED]
P.S.: Well, the docu says to include some info in this mail....
---------------------8<------------------
9:50 pinguin2% uname -a ~/test/make
Linux pinguin2 2.4.7 #4 SMP Tue Jul 24 16:52:08 CEST 2001 i686 unknown
9:50 pinguin2% make -v ~/test/make
GNU Make version 3.79.1, by Richard Stallman and Roland McGrath.
Built for i686-pc-linux-gnu
Copyright (C) 1988, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 2000
Free Software Foundation, Inc.
This is free software; see the source for copying conditions.
There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A
PARTICULAR PURPOSE.
Report bugs to <[EMAIL PROTECTED]>.
-------------------8<----------------------
############################################################
# /home/peter/test/make/GNUMakefile
# Peter Kutschera, Wed Apr 10 17:04:53 2002
# Time-stamp: "2002-04-11 09:04:56 peter"
# $Id$
# [EMAIL PROTECTED] (Forschungszentrum Seibersdorf)
# [EMAIL PROTECTED] (privat)
# © Peter Kutschera
#############################################################
test:
rm -f A B C D
touch C
@echo '*** OK: A and B are build once ***'
$(MAKE) D
rm A B C D
touch C
@echo '*** WRONG: A and B are build twice !! ***'
$(MAKE) -j2 D
rm A B C D
A B : C
@echo building A and B
cp C A
cp C B
D: A B
cat $^ > $@
----------------------8<---------------------
And the result when running the Makefile
9:50 pinguin2% make ~/test/make
rm -f A B C D
touch C
*** OK: A and B are build once ***
make D
make[1]: Entering directory `/home/peter/test/make'
building A and B
cp C A
cp C B
cat A B > D
make[1]: Leaving directory `/home/peter/test/make'
rm A B C D
touch C
*** WRONG: A and B are build twice !! ***
make -j2 D
make[1]: Entering directory `/home/peter/test/make'
building A and B
cp C A
cp C B
building A and B
cp C A
cp C B
cat A B > D
make[1]: Leaving directory `/home/peter/test/make'
rm A B C D
9:51 pinguin2%
:-(
Peter
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