-## Copyright (C) 2001, 2002, 2003, 2005, 2006, 2007, 2008 Free Software
-## Foundation, Inc.
+## Copyright (C) 2001-2003, 2005-2011 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
clean-local:
rm -rf $(CLEANDIRS)
+MOSTLYCLEANFILES += $(top_srcdir)/doc/*.t
+
CROSS_OPTIONS_PL = $(top_srcdir)/build-aux/cross-options.pl
CROSS_OPTIONS_TEXI = $(top_srcdir)/doc/cross-options.texi
-$(CROSS_OPTIONS_TEXI): $(top_srcdir)/src/getargs.c $(CROSS_OPTIONS_PL)
- -rm -f $@ $@.tmp
- $(MAKE) $(AM_MAKEFLAGS) src/bison$(EXEEXT)
- $(top_builddir)/src/bison --help | \
- perl $(CROSS_OPTIONS_PL) $(top_srcdir)/src/scan-gram.l >$@.tmp
+$(CROSS_OPTIONS_TEXI): doc/bison.help $(CROSS_OPTIONS_PL)
+# Create $@~ which is the previous contents. Don't use `mv' here so
+# that even if we are interrupted, the file is still available for
+# diff in the next run. Note that $@ might not exist yet.
+ { test ! -f $@ || cat $@; } >$@~
+ test ! -f $@.tmp || rm -f $@.tmp
+ src/bison$(EXEEXT) --help | \
+ perl $(CROSS_OPTIONS_PL) $(top_srcdir)/src/scan-gram.l >$@.tmp
+ diff -u $@~ $@.tmp || true
mv $@.tmp $@
MAINTAINERCLEANFILES = $(CROSS_OPTIONS_TEXI)
doc/refcard.ps: doc/refcard.dvi
+## ---------------- ##
+## doc/bison.help. ##
+## ---------------- ##
+
+# Some of our targets (cross-option.texi, bison.1) use "bison --help".
+# Since we want to ship the generated file to avoid additional
+# requirements over the user environment, we used not depend on
+# src/bison itself, but on src/getargs.c and other files. Yet, we
+# need "bison --help" to work to make help2man happy, so we used to
+# include "make src/bison" in the commands. Then we may have a
+# problem with concurrent builds, since one make might be aiming one
+# of its jobs at compiling src/bison, and another job at generating
+# the man page. If the latter is faster than the former, then we have
+# two makes that concurrently try to compile src/bison. Doomed to
+# failure.
+#
+# As a simple scheme to get our way out, make a stamp file,
+# bison.help, which contains --version then --help. This file can
+# depend on bison, which ensures its correctness. But update it
+# *only* if needed (content changes). This way, we avoid useless
+# compilations of cross-option.texi and bison.1. At the cost of
+# repeated builds of bison.help.
+
+EXTRA_DIST += $(top_srcdir)/doc/bison.help
+MAINTAINERCLEANFILES += $(top_srcdir)/doc/bison.help
+$(top_srcdir)/doc/bison.help: src/bison$(EXEEXT)
+ $< --version >doc/bison.help.t
+ $< --help >>doc/bison.help.t
+ $(top_srcdir)/build-aux/move-if-change doc/bison.help.t $@
+
+
## ----------- ##
## Man Pages. ##
## ----------- ##
dist_man_MANS = $(top_srcdir)/doc/bison.1
-EXTRA_DIST += $(dist_man_MANS:.1=.x) doc/common.x
+EXTRA_DIST += $(dist_man_MANS:.1=.x)
MAINTAINERCLEANFILES += $(dist_man_MANS)
-# Depend on configure to get version number changes.
-common_dep = $(top_srcdir)/configure $(top_srcdir)/doc/common.x
-$(top_srcdir)/doc/bison.1: $(common_dep) $(top_srcdir)/src/getargs.c
-
# Differences to ignore when comparing the man page (the date).
remove_time_stamp = \
sed 's/^\(\.TH[^"]*"[^"]*"[^"]*\)"[^"]*"/\1/'
-MOSTLYCLEANFILES += $(top_srcdir)/doc/*.t
-
-SUFFIXES = .x .1
-
-PREPATH = src
-.x.1:
- @program=`expr "/$*" : '.*/\(.*\)'` && \
- save_IFS=$IFS; \
- IFS=$(PATH_SEPARATOR); \
- for dir in $(PREPATH); do \
- IFS=$save_IFS; \
- echo $(MAKE) $(AM_MAKEFLAGS) $$dir/$$program; \
- $(MAKE) $(AM_MAKEFLAGS) $$dir/$$program || exit; \
- done
+# Depend on configure to get version number changes.
+$(top_srcdir)/doc/bison.1: doc/bison.help doc/bison.x $(top_srcdir)/configure
@echo "Updating man page $@"
- PATH="$(top_builddir)/$(PREPATH)$(PATH_SEPARATOR)$$PATH"; \
- export PATH; \
- $(HELP2MAN) \
- --include=$*.x \
- --include=$(top_srcdir)/doc/common.x \
- --output=$@.t `echo '$*' | sed 's,.*/,,'`
+ $(HELP2MAN) \
+ --include=$(top_srcdir)/doc/bison.x \
+ --output=$@.t src/bison$(EXEEXT)
if $(remove_time_stamp) $@ >$@a.t 2>/dev/null && \
$(remove_time_stamp) $@.t | cmp $@a.t - >/dev/null 2>&1; then \
- touch $@; \
+ touch $@; \
else \
- mv $@.t $@; \
+ mv $@.t $@; \
fi
rm -f $@*.t
projects / bison.git / blobdiff