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Simon Marchi 8345c4a267 Add gdb::string_view
We had a few times the need for a data structure that does essentially
what C++17's std::string_view does, which is to give an std::string-like
interface (only the read-only operations) to an arbitrary character
buffer.

This patch adapts the files copied from libstdc++ by the previous patch
to integrate them with GDB.  Here's a summary of the changes:

  * Remove things related to wstring_view, u16string_view and
  u32string_view (I don't think we need them, but we can always add them
  later).

  * Remove usages of _GLIBCXX_BEGIN_NAMESPACE_VERSION and
  _GLIBCXX_END_NAMESPACE_VERSION.

  * Put the code in the gdb namespace.  I had to add a few "std::" in
  front of std type usages.

  * Change __throw_out_of_range_fmt() for error().

  * Make gdb::string_view an alias of std::string_view when building
  with >= c++17.

  * Remove a bunch of constexpr, because they are not valid in c++11
  (e.g. they are not a single return line).

  * Use std::common_type<_Tp>::type instead of std::common_type_t<_Tp>,
  because c++11 doesn't have the later.

  * Remove the #pragma GCC system_header, since that silences some
  warnings that we might want to have if we're doing something not
  correctly.

  * Remove operator ""sv.  It would need a lot of work to make all
  supported compilers happy, and we can easily live without it.

  * Remove operator<<.  It is implemented using __ostream_insert (a
  libstdc++ internal).  Bringing it in might be possible, but I don't
  think that would be worth the effort, since we don't really use
  streams at the moment.

  * Replace internal libstdc++ asserts ( __glibcxx_assert and
  __glibcxx_requires_string_len) with gdb_assert.

  * Remove hash helpers, because they use libstdc++ internal functions.
  If we need them we always import them later.

The string_view class in cli/cli-script.c is removed and its usage
replaced with the new gdb::string_view.

gdb/ChangeLog:

	* common/gdb_string_view.h: Remove libstdc++ implementation
	details, adjust to gdb reality.
	* common/gdb_string_view.tcc: Likewise.
	* cli/cli-script.c (struct string_view): Remove.
	(user_args) <m_args>: Change element type to gdb::string_view.
	(user_args::insert_args): Adjust.
2018-04-09 14:20:46 -04:00
bfd MIPS64/BFD: Fix a crash with STN_UNDEF in relocation 2018-04-09 13:42:00 +01:00
binutils binutils/testsuite: Fix a crash with STN_UNDEF in relocation 2018-04-09 13:42:01 +01:00
config config: Sync with GCC 2018-04-05 15:22:13 -07:00
cpu opcodes error messages 2018-03-03 11:34:26 +10:30
elfcpp PowerPC inline PLT call support 2018-04-09 17:25:20 +09:30
etc Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30
gas Use dlsym to check if libdl is needed for plugin 2018-04-05 15:31:53 -07:00
gdb Add gdb::string_view 2018-04-09 14:20:46 -04:00
gold Regenerate some files 2018-04-10 00:20:19 +09:30
gprof Use dlsym to check if libdl is needed for plugin 2018-04-05 15:31:53 -07:00
include PowerPC inline PLT call support 2018-04-09 17:25:20 +09:30
intl Require ngettext in test of system gettext implementation 2017-11-07 15:56:44 +10:30
ld Regenerate some files 2018-04-10 00:20:19 +09:30
libdecnumber Remove leading/trailing white spaces in ChangeLog 2015-07-24 04:16:47 -07:00
libiberty Avoid compilation warning in libiberty/simple-object-xcoff.c 2018-01-27 18:25:06 +02:00
opcodes i386: Clear vex instead of vex.evex 2018-04-04 04:36:44 -07:00
readline Avoid MinGW compilation warning in readline/input.c 2017-05-19 11:05:59 +03:00
sim MAINTAINERS: Update my company e-mail address 2018-01-22 15:39:18 +00:00
texinfo
zlib Sync ZLIB with FSF GCC sources, bringing in version 1.2.11. 2017-02-20 12:52:22 +00:00
.cvsignore
.gitattributes
.gitignore Add archives and make stamps to the .gitignore file. 2016-09-27 15:10:42 +01:00
ChangeLog WebAssembly: Disable subdirectory configuration for unsupported LD 2018-02-13 12:56:29 +00:00
compile Update from upstream Automake 2014-11-16 13:43:48 +01:00
config-ml.in Update top level configure files by synchronizing them with gcc. 2018-01-10 15:29:21 +00:00
config.guess Update top level configure files by synchronizing them with gcc. 2018-01-10 15:29:21 +00:00
config.rpath
config.sub Update top level configure files by synchronizing them with gcc. 2018-01-10 15:29:21 +00:00
configure WebAssembly: Disable subdirectory configuration for unsupported LD 2018-02-13 12:56:29 +00:00
configure.ac WebAssembly: Disable subdirectory configuration for unsupported LD 2018-02-13 12:56:29 +00:00
COPYING
COPYING3
COPYING3.LIB
COPYING.LIB
COPYING.LIBGLOSS Update the address of the FSF in the copyright notice of files which were using the old address. 2017-12-14 12:48:55 +00:00
COPYING.NEWLIB
depcomp Update from upstream Automake 2014-11-16 13:43:48 +01:00
djunpack.bat
install-sh Update from upstream Automake 2014-11-16 13:43:48 +01:00
libtool.m4 Sync top-level btool.m4 with GCC 2016-01-12 08:44:52 -08:00
lt~obsolete.m4
ltgcc.m4
ltmain.sh
ltoptions.m4
ltsugar.m4
ltversion.m4
MAINTAINERS
Makefile.def Sync top-level make and configure files with FSF GCC mainline versions. 2017-01-23 11:55:48 +00:00
Makefile.in Sync top-level make and configure files with FSF GCC mainline versions. 2017-01-23 11:55:48 +00:00
Makefile.tpl Sync top-level make and configure files with FSF GCC mainline versions. 2017-01-23 11:55:48 +00:00
makefile.vms
missing Update from upstream Automake 2014-11-16 13:43:48 +01:00
mkdep
mkinstalldirs Update from upstream Automake 2014-11-16 13:43:48 +01:00
move-if-change Update `move-if-change' from gnulib 2014-11-16 17:04:02 +01:00
README
README-maintainer-mode
setup.com
src-release.sh Improve junk file removal in source tarball creation script. 2018-01-30 17:48:24 +00:00
symlink-tree
ylwrap Update from upstream Automake 2014-11-16 13:43:48 +01:00

		   README for GNU development tools

This directory contains various GNU compilers, assemblers, linkers, 
debuggers, etc., plus their support routines, definitions, and documentation.

If you are receiving this as part of a GDB release, see the file gdb/README.
If with a binutils release, see binutils/README;  if with a libg++ release,
see libg++/README, etc.  That'll give you info about this
package -- supported targets, how to use it, how to report bugs, etc.

It is now possible to automatically configure and build a variety of
tools with one command.  To build all of the tools contained herein,
run the ``configure'' script here, e.g.:

	./configure 
	make

To install them (by default in /usr/local/bin, /usr/local/lib, etc),
then do:
	make install

(If the configure script can't determine your type of computer, give it
the name as an argument, for instance ``./configure sun4''.  You can
use the script ``config.sub'' to test whether a name is recognized; if
it is, config.sub translates it to a triplet specifying CPU, vendor,
and OS.)

If you have more than one compiler on your system, it is often best to
explicitly set CC in the environment before running configure, and to
also set CC when running make.  For example (assuming sh/bash/ksh):

	CC=gcc ./configure
	make

A similar example using csh:

	setenv CC gcc
	./configure
	make

Much of the code and documentation enclosed is copyright by
the Free Software Foundation, Inc.  See the file COPYING or
COPYING.LIB in the various directories, for a description of the
GNU General Public License terms under which you can copy the files.

REPORTING BUGS: Again, see gdb/README, binutils/README, etc., for info
on where and how to report problems.