[PATCH 1/2] Read $GDBHISTSIZE instead of $HISTSIZE

[Eli Zaretskii]

> From: Patrick Palka <patrick@parcs.ath.cx>
> Cc: Patrick Palka <patrick@parcs.ath.cx>
> Date: Fri, 22 May 2015 07:23:50 -0400
> 
> The HISTSIZE environment variable is generally expected to be read by
> shells, not by applications.  Some distros for example globally export
> HISTSIZE in /etc/profile -- with the intention that it only affects
> shells -- and by doing so it renders useless GDB's own mechanism for
> setting the history size via .gdbinit.  Also, annoyances may arise when
> HISTSIZE is not interpreted the same way by the shell and by GDB, e.g.
> PR gdb/16999.  That can always be fixed on a shell-by-shell basis but it
> may be impossible to be consistent with the behavior of all shells at
> once.  Finally it just makes sense to not confound shell environment
> variables with application environment variables.
> 
> gdb/ChangeLog:
> 
> 	* NEWS: Add entry.
> 	* top.c (init_history): Read from GDBHISTSIZE instead of
> 	HISTSIZE.
> 	(init_main): Refer to GDBHISTSIZE instead of HISTSIZE.
> 
> gdb/doc/ChangeLog:
> 
> 	* gdb.texinfo (Command History): Replace occurrences of HISTSIZE
> 	with GDBHISTSIZE.

Thanks.

I think we should explain in the manual why we don't use HISTSIZE.
And I wonder why we cannot use HISTSIZE if neither GDBHISTSIZE nor
.gdbinit specify the size, but you probably already discussed that.

Otherwise, the documentation part is OK.