[PATCH 0/2] Move readline down one level

[Tom Tromey]

>>>>> "Tom" == Tom Tromey <tom@tromey.com> writes:

Tom> Patch #1 explains this in more detail, ...

That didn't come though, probably due to size.  Here it is gzipped, but
I've also added the commit text inline for easier reading.

Tom

commit a41d5ef1594c3f89c8054eddd9963ec01970dc89
Author: Tom Tromey <tom@tromey.com>
Date:   Sat Oct 5 16:39:44 2019 -0600

  Move readline to the readline/readline subdirectory
  
  readline turns out to be a bit of a stumbling block for the project to
  move gdbsupport (and then gdbserver) to the top-level.
  
  The issue is that readline headers are intended to be included with
  names like "readline/readline.h".  To support this, gdb effectively
  adds a -I option pointing to the top-level source directory -- but,
  importantly, this option is not used when the system readline is used.
  
  For gdbsupport, a -I option like this would always be needed, but that
  in turn would break the system readline case.  This was PR build/17077,
  fixed in commit a8a5dbcab8df0b3a9e04745d4fe8d64740acb323.
  
  Previously, we had discussed this on the gdb-patches list in terms of
  removing readline from the tree
  
      https://sourceware.org/ml/gdb-patches/2019-09/msg00317.html
  
  However, Eli expressed some concerns, and Joel did as well (off-list).
  
  Given those concerns, and the fact that a patch-free local readline is
  relatively new in gdb (it was locally patched for years), I changed my
  mind and decided to handle this situation by moving the readline
  sources down a level.
  
  That is, upstream readline is now in readline/readline, and the
  top-level readline directory just contains the minimal configury
  needed to build that.
  
  This fixes the problem because, when gdb unconditionally adds a
  -I$(top_srcdir), this will not find readline headers.  A separate -I
  will be needed instead, which is exactly what's needed for
  --with-system-readline.
  
  gdb/ChangeLog
  2019-10-07  Tom Tromey  <tom@tromey.com>
  
          * Makefile.in (READLINE_DIR): Update.
  
  gdb/doc/ChangeLog
  2019-10-07  Tom Tromey  <tom@tromey.com>
  
          * Makefile.in (READLINE_DIR): Update.
  
  readline/ChangeLog
  2019-10-07  Tom Tromey  <tom@tromey.com>
  
          Move old contents to readline/ subdirectory.
          * aclocal.m4, configure, configure.ac, .gitignore, Makefile.am,
          Makefile.in, README: New files.


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