build: fix compile errors on platforms without getopt.h

* bootstrap.conf (gnulib_modules): Add getopt-gnu.
* lib/.gitignore: Update from gnulib-tool --import.
* m4/.gitignore: Likewise.
* NEWS: Mention the fix.

NEWS

@@ -18,6 +18,11 @@ GNU sed NEWS                                    -*- outline -*-
   apostrophes) instead of `like this' (with a grave accent and an
   apostrophe).  This tracks the GNU coding standards.
 
+** Build-related
+
+  builds no longer fail on platforms without the <getoph.h> header or
+  getopt_long function.
+  [bug introduced in sed 4.9]
 
 * Noteworthy changes in release 4.9 (2022-11-06) [stable]
 

bootstrap.conf

@@ -30,6 +30,7 @@ eloop-threshold
 extensions
 fwriting
 getdelim
+getopt-gnu
 gettext-h
 git-version-gen
 gitlog-to-changelog

lib/.gitignore

@@ -209,7 +209,9 @@
 /time.h
 /time.in.h
 /uchar.h
+/unicase
 /unicase.h
+/unictype
 /unictype.h
 /uninorm.h
 /unistd.c
@@ -245,3 +247,38 @@
 /xalloc.h
 /xmalloc.c
 /stdlib.c
+/c32is-impl.h
+/c32isprint.c
+/c32isspace.c
+/c32rtomb.c
+/c32to-impl.h
+/c32tob.c
+/c32tolower.c
+/c32toupper.c
+/iswblank.c
+/iswctype-impl.h
+/iswctype.c
+/iswdigit.c
+/iswpunct.c
+/iswxdigit.c
+/mbrtoc32.c
+/mbszero.c
+/obstack.in.h
+/same-inode.c
+/setlocale_null-unlocked.c
+/uchar.in.h
+/unicase.in.h
+/unictype.in.h
+/uninorm.in.h
+/unitypes.in.h
+/wctype-impl.h
+/wctype.c
+/getopt-cdefs.in.h
+/getopt-core.h
+/getopt-ext.h
+/getopt-pfx-core.h
+/getopt-pfx-ext.h
+/getopt.c
+/getopt.in.h
+/getopt1.c
+/getopt_int.h

m4/.gitignore

@@ -235,3 +235,41 @@
 /semaphore.m4
 /sys_cdefs_h.m4
 /yield.m4
+/build-to-host.m4
+/c32rtomb.m4
+/exponentd.m4
+/exponentf.m4
+/exponentl.m4
+/extensions-aix.m4
+/fclose.m4
+/float_h.m4
+/fpieee.m4
+/gnulib-i18n.m4
+/init-package-version.m4
+/isnand.m4
+/isnanf.m4
+/isnanl.m4
+/iswblank.m4
+/iswctype.m4
+/iswdigit.m4
+/iswpunct.m4
+/iswxdigit.m4
+/libunistring-base.m4
+/locale-en.m4
+/math_h.m4
+/mbrtoc32.m4
+/nan-mips.m4
+/once.m4
+/signbit.m4
+/snan.m4
+/stpcpy.m4
+/time.m4
+/uchar_h.m4
+/unicase_h.m4
+/unictype_h.m4
+/uninorm_h.m4
+/wctype.m4
+/windows-rc.m4
+/xgetcwd.m4
+/getlocalename_l.m4
+/getopt.m4