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build: avoid concurrent extraction of calc++.

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* examples/calc++/Makefile.am (calc.stamp): New.
	Depend on it to create the sources of calc++ so that concurrent
	builds don't launch several "extexi" in parallel.
	Not only this is inefficient, this also builds incorrect sources
	with several extractions mixed together.
This commit is contained in:
Akim Demaille
2009-06-29 15:02:48 +02:00
parent ad597a7877
commit 5ece73eaa1
2 changed files with 15 additions and 2 deletions
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8
examples/calc++/Makefile.am
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@@ -1,5 +1,5 @@
## Process this file with automake to produce Makefile.in -*-Makefile-*-
## Copyright (C) 2005, 2006, 2008 Free Software Foundation, Inc.
## Copyright (C) 2005, 2006, 2008, 2009 Free Software Foundation, Inc.
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
@@ -31,12 +31,16 @@ $(BISON): $(BISON_IN)
doc = $(top_srcdir)/doc/bison.texinfo
extexi = $(top_srcdir)/examples/extexi
# Extract in src.
$(calc_extracted): $(doc) $(extexi)
calc.stamp: $(doc) $(extexi)
rm -f $@ $@.tmp
touch $@.tmp
cd $(srcdir) && \
$(AWK) -f ../extexi -v VERSION="$(VERSION)" \
../../doc/bison.texinfo -- calc++-parser.yy \
calc++-scanner.ll calc++.cc calc++-driver.hh calc++-driver.cc
mv $@.tmp $@
$(calc_extracted): calc.stamp
## ------------------- ##
## Parser generation. ##