Drop support for DJGPP, MS-DOS, Windows 95/98/ME

Basically a backport and squash-in of three Automake-NG commits:
v1.12.1-447-g041fe15, v1.12-343-g4526363, v1.12-341-gc853c20,
plus proper simplifications of the ylwrap script.

See also:
<http://lists.gnu.org/archive/html/automake-ng/2012-05/msg00104.html>

* automake.in (BEGIN): Don't override $ENV{SHELL} for DJGPP.
(handle_libtool): Do not bother cleaning '_libs' directories, they
are only used by Libtool on MS-DOS (and we no longer support that
setup).
* syntax-checks.mk (automake_diff_no): Adjust, as now there are only
seven (not eight) different lines between 'automake.in' and 'automake'.
* bootstrap.sh: Don't special case the default value for BOOTSTRAP_SHELL
on DJGPP.  While we are at, allow that variable to be overridden from
the environment. Also, adjust comments: we don't use "ln -s" not because
it's not properly supported by DJGPP, but because it might not be
properly supported by MinGW/MSYS.
* configure.ac (MODIFICATION_DELAY): Define to '2' unconditionally, as
we no longer have to cater to quirks of Windows 95/98/ME.
* lib/am/texibuild.am: Remove support for '*.iNN' files used on DJGPP.
* lib/am/texinfos.am: Likewise.
* lib/ylwrap: Remove support for DOS-specific filenames for bison
output.
* t/txinfo19.sh: Remove as obsolete.
* t/list-of-tests.mk: Adjust.
* NEWS: Update.

Signed-off-by: Stefano Lattarini <stefano.lattarini@gmail.com>

3 files changed, 7 insertions, 38 deletions

diff --git a/lib/am/texibuild.am b/lib/am/texibuild.am
index 0fe09b1f9..b60a3c95c 100644
--- a/lib/am/texibuild.am
+++ b/lib/am/texibuild.am
@@ -30,14 +30,13 @@
 ## 2) If the texinfo file has some minor mistakes which cause makeinfo
 ##    to fail, the info files are not removed.  (They are needed by the
 ##    developer while he writes documentation.)
-## *.iNN files are used on DJGPP.  See the comments in install-info-am
 	%AM_V_MAKEINFO%restore=: && backupdir="$(am__leading_dot)am$$$$" && \
 ?INSRC?	am__cwd=`pwd` && $(am__cd) $(srcdir) && \
 	rm -rf $$backupdir && mkdir $$backupdir && \
 ## If makeinfo is not installed we must not backup the files so
 ## 'missing' can do its job and touch $@ if it exists.
 	if ($(MAKEINFO) --version) >/dev/null 2>&1; then \
-	  for f in $@ $@-[0-9] $@-[0-9][0-9] $(@:.info=).i[0-9] $(@:.info=).i[0-9][0-9]; do \
+	  for f in $@ $@-[0-9] $@-[0-9][0-9]; do \
 	    if test -f $$f; then mv $$f $$backupdir; restore=mv; else :; fi; \
 	  done; \
 	else :; fi && \
diff --git a/lib/am/texinfos.am b/lib/am/texinfos.am
index 6d45c950a..c7b794ff7 100644
--- a/lib/am/texinfos.am
+++ b/lib/am/texinfos.am
@@ -194,18 +194,7 @@ install-info-am: $(INFO_DEPS)
 	    $(srcdir)/*) file=`echo "$$file" | sed "s|^$$srcdirstrip/||"`;; \
 	  esac; \
 	  if test -f $$file; then d=.; else d=$(srcdir); fi; \
-## 8+3 filesystems cannot deal with foo.info-N filenames: they all
-## conflict.  DJGPP comes with a tool, DJTAR, that will rename these
-## files to foo.iNN while extracting the archive.  DJGPP's makeinfo
-## is patched to grok these filenames.  However we have to account
-## for the renaming when installing the info files.
-##
-## If $file == foo.info, then $file_i == foo.i.  The reason we use two
-## shell commands instead of one ('s|\.info$$|.i|') is so that a suffix-less
-## 'foo' becomes 'foo.i' too.
-	  file_i=`echo "$$file" | sed 's|\.info$$||;s|$$|.i|'`; \
-	  for ifile in $$d/$$file $$d/$$file-[0-9] $$d/$$file-[0-9][0-9] \
-	               $$d/$$file_i[0-9] $$d/$$file_i[0-9][0-9] ; do \
+	  for ifile in $$d/$$file $$d/$$file-[0-9] $$d/$$file-[0-9][0-9]; do \
 	    if test -f $$ifile; then \
 	      echo "$$ifile"; \
 	    else : ; fi; \
@@ -323,11 +312,9 @@ uninstall-info-am:
 	@list='$(INFO_DEPS)'; \
 	for file in $$list; do \
 	  relfile=`echo "$$file" | sed 's|^.*/||'`; \
-## DJGPP-style info files.  See comment in install-info-am.
-	  relfile_i=`echo "$$relfile" | sed 's|\.info$$||;s|$$|.i|'`; \
 	  (if test -d "$(DESTDIR)$(infodir)" && cd "$(DESTDIR)$(infodir)"; then \
-	     echo " cd '$(DESTDIR)$(infodir)' && rm -f $$relfile $$relfile-[0-9] $$relfile-[0-9][0-9] $$relfile_i[0-9] $$relfile_i[0-9][0-9]"; \
-	     rm -f $$relfile $$relfile-[0-9] $$relfile-[0-9][0-9] $$relfile_i[0-9] $$relfile_i[0-9][0-9]; \
+	     echo " cd '$(DESTDIR)$(infodir)' && rm -f $$relfile $$relfile-[0-9] $$relfile-[0-9][0-9]"; \
+	     rm -f $$relfile $$relfile-[0-9] $$relfile-[0-9][0-9]; \
 	   else :; fi); \
 	done
 
@@ -400,10 +387,8 @@ clean-aminfo:
 .PHONY maintainer-clean-am: maintainer-clean-aminfo
 maintainer-clean-aminfo:
 	@list='$(INFO_DEPS)'; for i in $$list; do \
-## .iNN files are DJGPP-style info files.
-	  i_i=`echo "$$i" | sed 's|\.info$$||;s|$$|.i|'`; \
-	  echo " rm -f $$i $$i-[0-9] $$i-[0-9][0-9] $$i_i[0-9] $$i_i[0-9][0-9]"; \
-	  rm -f $$i $$i-[0-9] $$i-[0-9][0-9] $$i_i[0-9] $$i_i[0-9][0-9]; \
+	  echo " rm -f $$i $$i-[0-9] $$i-[0-9][0-9]"; \
+	  rm -f $$i $$i-[0-9] $$i-[0-9][0-9]; \
 	done
 ## Use '-rf', not just '-f'; see comments in 'mostlyclean-aminfo'
 ## above for details.
diff --git a/lib/ylwrap b/lib/ylwrap
index b5c673d5f..d59f6aa6e 100755
--- a/lib/ylwrap
+++ b/lib/ylwrap
@@ -1,7 +1,7 @@
 #! /bin/sh
 # ylwrap - wrapper for lex/yacc invocations.
 
-scriptversion=2012-12-21.17; # UTC
+scriptversion=2012-12-28.20; # UTC
 
 # Copyright (C) 1996-2012 Free Software Foundation, Inc.
 #
@@ -111,14 +111,6 @@ case "$input" in
 esac
 input_rx=`get_dirname "$input" | quote_for_sed`
 
-# Since DOS filename conventions don't allow two dots,
-# the DOS version of Bison writes out y_tab.c instead of y.tab.c
-# and y_tab.h instead of y.tab.h. Test to see if this is the case.
-y_tab_nodot=false
-if test -f y_tab.c || test -f y_tab.h; then
-  y_tab_nodot=true
-fi
-
 # The parser itself, the first file, is the destination of the .y.c
 # rule in the Makefile.
 parser=$1
@@ -138,13 +130,6 @@ while test "$#" -ne 0; do
     break
   fi
   from=$1
-  # Handle y_tab.c and y_tab.h output by DOS
-  if $y_tab_nodot; then
-    case $from in
-      "y.tab.c") from=y_tab.c;;
-      "y.tab.h") from=y_tab.h;;
-    esac
-  fi
   shift
   to=$1
   shift