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6999161a2a
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 a8a5dbcab8.
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
2019-10-23 Tom Tromey <tom@tromey.com>
* Makefile.in (READLINE_DIR): Update.
gdb/doc/ChangeLog
2019-10-23 Tom Tromey <tom@tromey.com>
* Makefile.in (READLINE_DIR): Update.
readline/ChangeLog
2019-10-23 Tom Tromey <tom@tromey.com>
Move old contents to readline/ subdirectory.
* aclocal.m4, configure, configure.ac, .gitignore, Makefile.am,
Makefile.in, README: New files.
Change-Id: Ice156a2ee09ea68722b48f64d97146d7428ea9e4
58 lines
1.8 KiB
C
58 lines
1.8 KiB
C
/* stdc.h -- macros to make source compile on both ANSI C and K&R C compilers. */
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/* Copyright (C) 1993-2009 Free Software Foundation, Inc.
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This file is part of the GNU Readline Library (Readline), a library
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for reading lines of text with interactive input and history editing.
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Readline is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Readline is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Readline. If not, see <http://www.gnu.org/licenses/>.
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*/
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#if !defined (_RL_STDC_H_)
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#define _RL_STDC_H_
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/* Adapted from BSD /usr/include/sys/cdefs.h. */
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/* A function can be defined using prototypes and compile on both ANSI C
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and traditional C compilers with something like this:
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extern char *func PARAMS((char *, char *, int)); */
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#if !defined (PARAMS)
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# if defined (__STDC__) || defined (__GNUC__) || defined (__cplusplus)
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# define PARAMS(protos) protos
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# else
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# define PARAMS(protos) ()
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# endif
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#endif
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#ifndef __attribute__
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# if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 8)
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# define __attribute__(x)
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# endif
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#endif
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/* Moved from config.h.in because readline.h:rl_message depends on these
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defines. */
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#if defined (__STDC__) && defined (HAVE_STDARG_H)
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# define PREFER_STDARG
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# define USE_VARARGS
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#else
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# if defined (HAVE_VARARGS_H)
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# define PREFER_VARARGS
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# define USE_VARARGS
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# endif
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#endif
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#endif /* !_RL_STDC_H_ */
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