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Andrew Burgess 9f9aa85206 gdb: Make python display_hint None handling defined behaviour
The documentation say that the display_hint method must return a
string to serve as a display hint, and then goes on to list some
acceptable strings.

However, if we don't supply the display_hint method then we get a
default display style behaviour and there's currently no way (in the
python api) to force this default behaviour.

The guile api allows #f to be used in order to force the default
display style behaviour, and this is documented.

Currently, using None in the python api also forces the default
display behaviour.

This commit extends the documentation to make returning None from the
display_hint method an official mechanism by which the user can get
the default display style.

I've extended one of the existing tests to cover this case.

gdb/doc/ChangeLog:

	* python.texi (Pretty Printing API): Document use of None for the
	display_hint.

gdb/testsuite/ChangeLog:

	* gdb.python/py-prettyprint.c (struct container) <is_map_p>: New
	field.
	(make_container): Initialise new field.
	* gdb.python/py-prettyprint.exp: Add new tests.
	* gdb.python/py-prettyprint.py (class ContainerPrinter)
	<display_hint>: New method.
2019-03-26 18:25:10 +00:00
bfd Automatic date update in version.in 2019-03-26 00:00:40 +00:00
binutils AArch64/Arm: Update testcases fixing endiannes and linux targets 2019-03-26 16:47:14 +00:00
config
contrib
cpu
elfcpp
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gas Remove strip_underscore from struct emulation 2019-03-21 08:50:24 +10:30
gdb gdb: Make python display_hint None handling defined behaviour 2019-03-26 18:25:10 +00:00
gold
gprof
include AArch64: Fix disassembler bug with out-of-order sections 2019-03-25 15:05:53 +00:00
intl
ld Provide string description of definition, visibility and resolution in LTO plug-in. 2019-03-26 15:22:01 +01:00
libdecnumber
libiberty
opcodes Arm: Fix Arm disassembler mapping symbol search. 2019-03-25 15:05:53 +00:00
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		   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.