gnulib: update

* README-hacking: Commit before bootstrapping.
* bootstrap.conf: gnulib_mk is no longer defined by bootstrap.
* bootstrap, gnulib, lib/.gitignore, m4/.gitignore: Update/regen.

README-hacking

@@ -103,14 +103,16 @@ to perform the first checkout of the submodules, run
 
        $ git submodule update --init
 
-Git submodule support is weak before versions 1.6 and later, upgrade Git if
-your version is older.
-
 The next step is to get other files needed to build, which are
 extracted from other source packages:
 
         $ ./bootstrap
 
+Bootstrapping updates the submodules to the versions registered in the
+top-level directory.  To change gnulib, first check out the version you want
+in `gnulib`, then commit this change in Bison's repository, and finally run
+bootstrap.
+
 If it fails with missing symbols (e.g., "error: possibly undefined macro:
 AC_PROG_GNU_M4"), you are likely to have forgotten the submodule
 initialization part.  Otherwise, there you are!  Just

bootstrap

@@ -1,10 +1,10 @@
 #! /bin/sh
 # Print a version string.
-scriptversion=2017-09-13.06; # UTC
+scriptversion=2018-04-28.14; # UTC
 
 # Bootstrap this package from checked-out sources.
 
-# Copyright (C) 2003-2017 Free Software Foundation, Inc.
+# Copyright (C) 2003-2018 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
@@ -109,9 +109,6 @@ die() { warn_ "$@"; exit 1; }
 
 # Configuration.
 
-# Name of the Makefile.am
-gnulib_mk=gnulib.mk
-
 # List of gnulib modules needed.
 gnulib_modules=
 
@@ -170,7 +167,15 @@ source_base=lib
 m4_base=m4
 doc_base=doc
 tests_base=tests
-gnulib_extra_files=''
+gnulib_extra_files="
+        build-aux/install-sh
+        build-aux/mdate-sh
+        build-aux/texinfo.tex
+        build-aux/depcomp
+        build-aux/config.guess
+        build-aux/config.sub
+        doc/INSTALL
+"
 
 # Additional gnulib-tool options to use.  Use "\newline" to break lines.
 gnulib_tool_option_extras=
@@ -264,24 +269,18 @@ case "$0" in
   *) test -r "$0.conf" && . ./"$0.conf" ;;
 esac
 
-# Extra files from gnulib, which override files from other sources.
-test -z "${gnulib_extra_files}" && \
-  gnulib_extra_files="
-        build-aux/install-sh
-        build-aux/mdate-sh
-        build-aux/texinfo.tex
-        build-aux/depcomp
-        build-aux/config.guess
-        build-aux/config.sub
-        doc/INSTALL
-"
-
 if test "$vc_ignore" = auto; then
   vc_ignore=
   test -d .git && vc_ignore=.gitignore
   test -d CVS && vc_ignore="$vc_ignore .cvsignore"
 fi
 
+if test x"$gnulib_modules$gnulib_files$gnulib_extra_files" = x; then
+  use_gnulib=false
+else
+  use_gnulib=true
+fi
+
 # Translate configuration into internal form.
 
 # Parse options.
@@ -612,6 +611,7 @@ git_modules_config () {
   test -f .gitmodules && git config --file .gitmodules "$@"
 }
 
+if $use_gnulib; then
   if $use_git; then
     gnulib_path=$(git_modules_config submodule.gnulib.path)
     test -z "$gnulib_path" && gnulib_path=gnulib
@@ -690,6 +690,7 @@ fi
 
   gnulib_tool=$GNULIB_SRCDIR/gnulib-tool
   <$gnulib_tool || exit $?
+fi
 
 # Get translations.
 
@@ -699,7 +700,7 @@ download_po_files() {
   echo "$me: getting translations into $subdir for $domain..."
   cmd=$(printf "$po_download_command_format" "$domain" "$subdir")
   eval "$cmd" && return
-  # Fallback to HTTP.
+  # Fallback to HTTPS.
   cmd=$(printf "$po_download_command_format2" "$subdir" "$domain")
   eval "$cmd"
 }
@@ -792,7 +793,7 @@ symlink_to_dir()
       # aren't confused into doing unnecessary builds.  Conversely, if the
       # existing symlink's timestamp is older than the source, make it afresh,
       # so that broken tools aren't confused into skipping needed builds.  See
-      # <https://lists.gnu.org/archive/html/bug-gnulib/2011-05/msg00326.html>.
+      # <https://lists.gnu.org/r/bug-gnulib/2011-05/msg00326.html>.
       test -h "$dst" &&
       src_ls=$(ls -diL "$src" 2>/dev/null) && set $src_ls && src_i=$1 &&
       dst_ls=$(ls -diL "$dst" 2>/dev/null) && set $dst_ls && dst_i=$1 &&
@@ -898,8 +899,8 @@ fi
 
 # Import from gnulib.
 
+if $use_gnulib; then
   gnulib_tool_options="\
- --import\
    --no-changelog\
    --aux-dir $build_aux\
    --doc-base $doc_base\
@@ -924,6 +925,7 @@ for file in $gnulib_files; do
     symlink_to_dir "$GNULIB_SRCDIR" $file \
       || die "failed to symlink $file"
   done
+fi
 
 bootstrap_post_import_hook \
   || die "bootstrap_post_import_hook failed"
@@ -1020,7 +1022,7 @@ bootstrap_epilogue
 echo "$0: done.  Now you can run './configure'."
 
 # Local variables:
-# eval: (add-hook 'write-file-hooks 'time-stamp)
+# eval: (add-hook 'before-save-hook 'time-stamp)
 # time-stamp-start: "scriptversion="
 # time-stamp-format: "%:y-%02m-%02d.%02H"
 # time-stamp-time-zone: "UTC0"

bootstrap.conf

@@ -81,7 +81,7 @@ gnulib_tool_option_extras='--symlink --makefile-name=gnulib.mk'
 bootstrap_post_import_hook()
 {
   # Massage lib/gnulib.mk before using it later in the bootstrapping process.
-  build-aux/prefix-gnulib-mk --lib-name=$gnulib_name lib/$gnulib_mk
+  build-aux/prefix-gnulib-mk --lib-name=$gnulib_name lib/gnulib.mk
 
   # Ensure that ChangeLog exists, for automake.
   test -f ChangeLog || touch ChangeLog

lib/.gitignore

@@ -117,7 +117,6 @@
 /malloc.c
 /malloca.c
 /malloca.h
-/malloca.valgrind
 /math.c
 /math.h
 /math.in.h
@@ -229,7 +228,6 @@
 /sys_ioctl.in.h
 /sys_socket.in.h
 /sys_stat.in.h
-/sys_time.in.h
 /sys_types.in.h
 /sys_wait.in.h
 /sysexits.in.h
@@ -276,3 +274,5 @@
 /xsize.h
 /xstrndup.c
 /xstrndup.h
+/stat-time.c
+/stat-time.h

m4/.gitignore

@@ -178,3 +178,5 @@
 /xalloc.m4
 /xsize.m4
 /xstrndup.m4
+/host-cpu-c-abi.m4
+/stat-time.m4