gnulib: Upgrade Gnulib and switch to bootstrap tool

Upgrade Gnulib files to 20190105.

It's much easier to maintain GRUB's use of portability support files
from Gnulib when the process is automatic and driven by a single
configuration file, rather than by maintainers occasionally running
gnulib-tool and committing the result.  Removing these
automatically-copied files from revision control also removes the
temptation to hack the output in ways that are difficult for future
maintainers to follow.  Gnulib includes a "bootstrap" program which is
designed for this.

The canonical way to bootstrap GRUB from revision control is now
"./bootstrap", but "./autogen.sh" is still useful if you just want to
generate the GRUB-specific parts of the build system.

GRUB now requires Autoconf >= 2.63 and Automake >= 1.11, in line with
Gnulib.

Gnulib source code is now placed in grub-core/lib/gnulib/ (which should
not be edited directly), and GRUB's patches are in
grub-core/lib/gnulib-patches/.  I've added a few notes to the developer
manual on how to maintain this.

Signed-off-by: Colin Watson <cjwatson@ubuntu.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>

1 files changed, 0 insertions, 271 deletions

diff --git a/build-aux/snippet/c++defs.h b/build-aux/snippet/c++defs.h
deleted file mode 100644
index b35b933cd..000000000
--- a/build-aux/snippet/c++defs.h
+++ /dev/null
@@ -1,271 +0,0 @@
-/* C++ compatible function declaration macros.
-   Copyright (C) 2010-2013 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 the Free Software Foundation; either version 3 of the License, or
-   (at your option) any later version.
-
-   This program is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-   General Public License for more details.
-
-   You should have received a copy of the GNU General Public License
-   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
-
-#ifndef _GL_CXXDEFS_H
-#define _GL_CXXDEFS_H
-
-/* The three most frequent use cases of these macros are:
-
-   * For providing a substitute for a function that is missing on some
-     platforms, but is declared and works fine on the platforms on which
-     it exists:
-
-       #if @GNULIB_FOO@
-       # if !@HAVE_FOO@
-       _GL_FUNCDECL_SYS (foo, ...);
-       # endif
-       _GL_CXXALIAS_SYS (foo, ...);
-       _GL_CXXALIASWARN (foo);
-       #elif defined GNULIB_POSIXCHECK
-       ...
-       #endif
-
-   * For providing a replacement for a function that exists on all platforms,
-     but is broken/insufficient and needs to be replaced on some platforms:
-
-       #if @GNULIB_FOO@
-       # if @REPLACE_FOO@
-       #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-       #   undef foo
-       #   define foo rpl_foo
-       #  endif
-       _GL_FUNCDECL_RPL (foo, ...);
-       _GL_CXXALIAS_RPL (foo, ...);
-       # else
-       _GL_CXXALIAS_SYS (foo, ...);
-       # endif
-       _GL_CXXALIASWARN (foo);
-       #elif defined GNULIB_POSIXCHECK
-       ...
-       #endif
-
-   * For providing a replacement for a function that exists on some platforms
-     but is broken/insufficient and needs to be replaced on some of them and
-     is additionally either missing or undeclared on some other platforms:
-
-       #if @GNULIB_FOO@
-       # if @REPLACE_FOO@
-       #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-       #   undef foo
-       #   define foo rpl_foo
-       #  endif
-       _GL_FUNCDECL_RPL (foo, ...);
-       _GL_CXXALIAS_RPL (foo, ...);
-       # else
-       #  if !@HAVE_FOO@   or   if !@HAVE_DECL_FOO@
-       _GL_FUNCDECL_SYS (foo, ...);
-       #  endif
-       _GL_CXXALIAS_SYS (foo, ...);
-       # endif
-       _GL_CXXALIASWARN (foo);
-       #elif defined GNULIB_POSIXCHECK
-       ...
-       #endif
-*/
-
-/* _GL_EXTERN_C declaration;
-   performs the declaration with C linkage.  */
-#if defined __cplusplus
-# define _GL_EXTERN_C extern "C"
-#else
-# define _GL_EXTERN_C extern
-#endif
-
-/* _GL_FUNCDECL_RPL (func, rettype, parameters_and_attributes);
-   declares a replacement function, named rpl_func, with the given prototype,
-   consisting of return type, parameters, and attributes.
-   Example:
-     _GL_FUNCDECL_RPL (open, int, (const char *filename, int flags, ...)
-                                  _GL_ARG_NONNULL ((1)));
- */
-#define _GL_FUNCDECL_RPL(func,rettype,parameters_and_attributes) \
-  _GL_FUNCDECL_RPL_1 (rpl_##func, rettype, parameters_and_attributes)
-#define _GL_FUNCDECL_RPL_1(rpl_func,rettype,parameters_and_attributes) \
-  _GL_EXTERN_C rettype rpl_func parameters_and_attributes
-
-/* _GL_FUNCDECL_SYS (func, rettype, parameters_and_attributes);
-   declares the system function, named func, with the given prototype,
-   consisting of return type, parameters, and attributes.
-   Example:
-     _GL_FUNCDECL_SYS (open, int, (const char *filename, int flags, ...)
-                                  _GL_ARG_NONNULL ((1)));
- */
-#define _GL_FUNCDECL_SYS(func,rettype,parameters_and_attributes) \
-  _GL_EXTERN_C rettype func parameters_and_attributes
-
-/* _GL_CXXALIAS_RPL (func, rettype, parameters);
-   declares a C++ alias called GNULIB_NAMESPACE::func
-   that redirects to rpl_func, if GNULIB_NAMESPACE is defined.
-   Example:
-     _GL_CXXALIAS_RPL (open, int, (const char *filename, int flags, ...));
- */
-#define _GL_CXXALIAS_RPL(func,rettype,parameters) \
-  _GL_CXXALIAS_RPL_1 (func, rpl_##func, rettype, parameters)
-#if defined __cplusplus && defined GNULIB_NAMESPACE
-# define _GL_CXXALIAS_RPL_1(func,rpl_func,rettype,parameters) \
-    namespace GNULIB_NAMESPACE                                \
-    {                                                         \
-      rettype (*const func) parameters = ::rpl_func;          \
-    }                                                         \
-    _GL_EXTERN_C int _gl_cxxalias_dummy
-#else
-# define _GL_CXXALIAS_RPL_1(func,rpl_func,rettype,parameters) \
-    _GL_EXTERN_C int _gl_cxxalias_dummy
-#endif
-
-/* _GL_CXXALIAS_RPL_CAST_1 (func, rpl_func, rettype, parameters);
-   is like  _GL_CXXALIAS_RPL_1 (func, rpl_func, rettype, parameters);
-   except that the C function rpl_func may have a slightly different
-   declaration.  A cast is used to silence the "invalid conversion" error
-   that would otherwise occur.  */
-#if defined __cplusplus && defined GNULIB_NAMESPACE
-# define _GL_CXXALIAS_RPL_CAST_1(func,rpl_func,rettype,parameters) \
-    namespace GNULIB_NAMESPACE                                     \
-    {                                                              \
-      rettype (*const func) parameters =                           \
-        reinterpret_cast<rettype(*)parameters>(::rpl_func);        \
-    }                                                              \
-    _GL_EXTERN_C int _gl_cxxalias_dummy
-#else
-# define _GL_CXXALIAS_RPL_CAST_1(func,rpl_func,rettype,parameters) \
-    _GL_EXTERN_C int _gl_cxxalias_dummy
-#endif
-
-/* _GL_CXXALIAS_SYS (func, rettype, parameters);
-   declares a C++ alias called GNULIB_NAMESPACE::func
-   that redirects to the system provided function func, if GNULIB_NAMESPACE
-   is defined.
-   Example:
-     _GL_CXXALIAS_SYS (open, int, (const char *filename, int flags, ...));
- */
-#if defined __cplusplus && defined GNULIB_NAMESPACE
-  /* If we were to write
-       rettype (*const func) parameters = ::func;
-     like above in _GL_CXXALIAS_RPL_1, the compiler could optimize calls
-     better (remove an indirection through a 'static' pointer variable),
-     but then the _GL_CXXALIASWARN macro below would cause a warning not only
-     for uses of ::func but also for uses of GNULIB_NAMESPACE::func.  */
-# define _GL_CXXALIAS_SYS(func,rettype,parameters) \
-    namespace GNULIB_NAMESPACE                     \
-    {                                              \
-      static rettype (*func) parameters = ::func;  \
-    }                                              \
-    _GL_EXTERN_C int _gl_cxxalias_dummy
-#else
-# define _GL_CXXALIAS_SYS(func,rettype,parameters) \
-    _GL_EXTERN_C int _gl_cxxalias_dummy
-#endif
-
-/* _GL_CXXALIAS_SYS_CAST (func, rettype, parameters);
-   is like  _GL_CXXALIAS_SYS (func, rettype, parameters);
-   except that the C function func may have a slightly different declaration.
-   A cast is used to silence the "invalid conversion" error that would
-   otherwise occur.  */
-#if defined __cplusplus && defined GNULIB_NAMESPACE
-# define _GL_CXXALIAS_SYS_CAST(func,rettype,parameters) \
-    namespace GNULIB_NAMESPACE                          \
-    {                                                   \
-      static rettype (*func) parameters =               \
-        reinterpret_cast<rettype(*)parameters>(::func); \
-    }                                                   \
-    _GL_EXTERN_C int _gl_cxxalias_dummy
-#else
-# define _GL_CXXALIAS_SYS_CAST(func,rettype,parameters) \
-    _GL_EXTERN_C int _gl_cxxalias_dummy
-#endif
-
-/* _GL_CXXALIAS_SYS_CAST2 (func, rettype, parameters, rettype2, parameters2);
-   is like  _GL_CXXALIAS_SYS (func, rettype, parameters);
-   except that the C function is picked among a set of overloaded functions,
-   namely the one with rettype2 and parameters2.  Two consecutive casts
-   are used to silence the "cannot find a match" and "invalid conversion"
-   errors that would otherwise occur.  */
-#if defined __cplusplus && defined GNULIB_NAMESPACE
-  /* The outer cast must be a reinterpret_cast.
-     The inner cast: When the function is defined as a set of overloaded
-     functions, it works as a static_cast<>, choosing the designated variant.
-     When the function is defined as a single variant, it works as a
-     reinterpret_cast<>. The parenthesized cast syntax works both ways.  */
-# define _GL_CXXALIAS_SYS_CAST2(func,rettype,parameters,rettype2,parameters2) \
-    namespace GNULIB_NAMESPACE                                                \
-    {                                                                         \
-      static rettype (*func) parameters =                                     \
-        reinterpret_cast<rettype(*)parameters>(                               \
-          (rettype2(*)parameters2)(::func));                                  \
-    }                                                                         \
-    _GL_EXTERN_C int _gl_cxxalias_dummy
-#else
-# define _GL_CXXALIAS_SYS_CAST2(func,rettype,parameters,rettype2,parameters2) \
-    _GL_EXTERN_C int _gl_cxxalias_dummy
-#endif
-
-/* _GL_CXXALIASWARN (func);
-   causes a warning to be emitted when ::func is used but not when
-   GNULIB_NAMESPACE::func is used.  func must be defined without overloaded
-   variants.  */
-#if defined __cplusplus && defined GNULIB_NAMESPACE
-# define _GL_CXXALIASWARN(func) \
-   _GL_CXXALIASWARN_1 (func, GNULIB_NAMESPACE)
-# define _GL_CXXALIASWARN_1(func,namespace) \
-   _GL_CXXALIASWARN_2 (func, namespace)
-/* To work around GCC bug <http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43881>,
-   we enable the warning only when not optimizing.  */
-# if !__OPTIMIZE__
-#  define _GL_CXXALIASWARN_2(func,namespace) \
-    _GL_WARN_ON_USE (func, \
-                     "The symbol ::" #func " refers to the system function. " \
-                     "Use " #namespace "::" #func " instead.")
-# elif __GNUC__ >= 3 && GNULIB_STRICT_CHECKING
-#  define _GL_CXXALIASWARN_2(func,namespace) \
-     extern __typeof__ (func) func
-# else
-#  define _GL_CXXALIASWARN_2(func,namespace) \
-     _GL_EXTERN_C int _gl_cxxalias_dummy
-# endif
-#else
-# define _GL_CXXALIASWARN(func) \
-    _GL_EXTERN_C int _gl_cxxalias_dummy
-#endif
-
-/* _GL_CXXALIASWARN1 (func, rettype, parameters_and_attributes);
-   causes a warning to be emitted when the given overloaded variant of ::func
-   is used but not when GNULIB_NAMESPACE::func is used.  */
-#if defined __cplusplus && defined GNULIB_NAMESPACE
-# define _GL_CXXALIASWARN1(func,rettype,parameters_and_attributes) \
-   _GL_CXXALIASWARN1_1 (func, rettype, parameters_and_attributes, \
-                        GNULIB_NAMESPACE)
-# define _GL_CXXALIASWARN1_1(func,rettype,parameters_and_attributes,namespace) \
-   _GL_CXXALIASWARN1_2 (func, rettype, parameters_and_attributes, namespace)
-/* To work around GCC bug <http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43881>,
-   we enable the warning only when not optimizing.  */
-# if !__OPTIMIZE__
-#  define _GL_CXXALIASWARN1_2(func,rettype,parameters_and_attributes,namespace) \
-    _GL_WARN_ON_USE_CXX (func, rettype, parameters_and_attributes, \
-                         "The symbol ::" #func " refers to the system function. " \
-                         "Use " #namespace "::" #func " instead.")
-# elif __GNUC__ >= 3 && GNULIB_STRICT_CHECKING
-#  define _GL_CXXALIASWARN1_2(func,rettype,parameters_and_attributes,namespace) \
-     extern __typeof__ (func) func
-# else
-#  define _GL_CXXALIASWARN1_2(func,rettype,parameters_and_attributes,namespace) \
-     _GL_EXTERN_C int _gl_cxxalias_dummy
-# endif
-#else
-# define _GL_CXXALIASWARN1(func,rettype,parameters_and_attributes) \
-    _GL_EXTERN_C int _gl_cxxalias_dummy
-#endif
-
-#endif /* _GL_CXXDEFS_H */