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maint: run "make update-copyright".
[bison.git] / doc / local.mk
diff --git a/doc/local.mk b/doc/local.mk
index a352459d7b476105ea845f835f8e6b83c5519fc7..3e7a8360084937d979dde8d7d90edb59afc44ca9 100644 (file)
--- a/doc/local.mk
+++ b/doc/local.mk
@@ -1,5 +1,4 @@
-## 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
 
 ## 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
@@ -26,13 +25,19 @@ CLEANDIRS = doc/*.t2d
 clean-local:
        rm -rf $(CLEANDIRS)
 
 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_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)
 
        mv $@.tmp $@
 MAINTAINERCLEANFILES = $(CROSS_OPTIONS_TEXI)
 
@@ -49,49 +54,61 @@ doc/refcard.dvi: doc/refcard.tex
 doc/refcard.ps: doc/refcard.dvi
 
 
 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
 
 ## ----------- ##
 ## 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)
 
 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/'
 
 # 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 $@"
        @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 \
        if $(remove_time_stamp) $@ >$@a.t 2>/dev/null &&                 \
           $(remove_time_stamp) $@.t | cmp $@a.t - >/dev/null 2>&1; then \
-               touch $@;                                                \
+         touch $@;                                                      \
        else                                                             \
        else                                                             \
-               mv $@.t $@;                                              \
+         mv $@.t $@;                                                    \
        fi
        rm -f $@*.t
 
        fi
        rm -f $@*.t
 
bison