Sync readline/ to version 7.0 alpha

This patch syncs our upstream copy of readline from version 6.2 to the
latest version, 7.0 alpha (released July 10 2015).

I essentially copied what was done the last time readline was synced,
when Jan updated to readline 6.2 in 2011:
http://sourceware.org/ml/gdb-patches/2011-05/msg00003.html

Procedure:

1. I extracted the readline-7.0-alpha tarball on top of readline/.
2. I deleted all the new files under doc/ that were deliberately omitted
   before.
3. I regenerated readline/configure and readline/examples/rlfe/configure
   using autoconf 2.64.  No other configure files need regenerating.
4. I updated the function gdb_printable_part in completer.c with a
   trivial change made to the readline function it is based off of,
   printable_part in readline/complete.c.  There is more work to be done in
   completer.c to sync it with readline/complete.c, but it is non-trivial
   and should probably be done separately anyway.

Local patches that had to be reapplied:

    None.  readline 7.0 alpha contains all of our local readline
    patches.

New files in readline/:

    colors.{c,h}
    examples/{hist_erasedups,hist_purgecmd,rl-callbacktest,rlbasic}.c
    parse-colors.{c,h}
    readline.pc.in
    configure.ac

Deleted files in readline/:

    configure.in

Regressions:

After the sync there is one testsuite regression, the test
"signal SIGINT" in gdb.gdb/selftest.exp which now FAILs.  Previously,
the readline 6.2 SIGINT handler would temporarily reinstall the
underlying application's SIGINT handler and immediately re-raise SIGINT
so that the orginal handler gets invoked.  But now (since readline 6.3)
its SIGINT handler does not re-raise SIGINT or directly invoke the
original handler; it now sets a flag marking that SIGINT was raised, and
waits until readline explicitly has control to call the application's
SIGINT handler.  Anyway, because SIGINT is no longer re-raised from
within readline's SIGINT handler, doing "signal SIGINT" with a stopped
inferior gdb process will no longer resume and then immediately stop the
process (since there is no 2nd SIGINT to immediately catch).  Instead,
the inferior gdb process will now just print "Quit" and continue to run.
So with this commit, this particular test case is adjusted to reflect
this change in behavior (we now have to send a 2nd SIGINT manually to
stop it).

Aside from this one testsuite regression, I personally noticed no
regression in user-visible behavior.  Though I only tested on x86_64
and on i686 Debian Stretch.

Getting this kind of change in at the start of the GDB 7.11 development
cycle will allow us to get a lot of passive testing from developers and
from bleeding-edge users.

readline/ChangeLog.gdb:

	Import readline 7.0 alpha
	* configure: Regenerate.
	* examples/rlfe/configure: Regenerate.

gdb/ChangeLog:

	* completer.c (gdb_printable_part): Sync with readline function
	it is based off of.

gdb/testsuite/ChangeLog:

	* gdb.gdb/selftest.exp (test_with_self): Update test to now
	expect the GDB inferior to no longer immediately stop after
	being resumed with "signal SIGINT".

1 files changed, 40 insertions, 14 deletions

diff --git a/readline/config.h.in b/readline/config.h.in
index 8560c4b..e5658c2 100644
--- a/readline/config.h.in
+++ b/readline/config.h.in
@@ -1,14 +1,21 @@
 /* config.h.in.  Maintained by hand. */
 
+/* Template definitions for autoconf */
+#undef __EXTENSIONS__
+#undef _ALL_SOURCE
+#undef _GNU_SOURCE
+#undef _POSIX_SOURCE
+#undef _POSIX_1_SOURCE
+#undef _POSIX_PTHREAD_SEMANTICS
+#undef _TANDEM_SOURCE
+#undef _MINIX
+
 /* Define NO_MULTIBYTE_SUPPORT to not compile in support for multibyte
    characters, even if the OS supports them. */
 #undef NO_MULTIBYTE_SUPPORT
 
 #undef _FILE_OFFSET_BITS
 
-/* Define if on MINIX.  */
-#undef _MINIX
-
 /* Define as the return type of signal handlers (int or void).  */
 #undef RETSIGTYPE
 
@@ -26,12 +33,16 @@
 #undef volatile
 
 #undef PROTOTYPES
+#undef __PROTOTYPES
 
 #undef __CHAR_UNSIGNED__
 
 /* Define if the `S_IS*' macros in <sys/stat.h> do not work properly.  */
 #undef STAT_MACROS_BROKEN
 
+/* Define if you have the chown function. */
+#undef HAVE_CHOWN
+
 /* Define if you have the fcntl function. */
 #undef HAVE_FCNTL
 
@@ -77,9 +88,15 @@
 /* Define if you have the memmove function. */
 #undef HAVE_MEMMOVE
 
+/* Define if you have the pselect function.  */
+#undef HAVE_PSELECT
+
 /* Define if you have the putenv function.  */
 #undef HAVE_PUTENV
 
+/* Define if you have the readlink function.  */
+#undef HAVE_READLINK
+
 /* Define if you have the select function.  */
 #undef HAVE_SELECT
 
@@ -124,6 +141,9 @@
 /* Define if you have the wcwidth function.  */
 #undef HAVE_WCWIDTH
 
+/* and whether it works */
+#undef WCWIDTH_BROKEN
+
 #undef STDC_HEADERS
 
 /* Define if you have the <dirent.h> header file.  */
@@ -147,12 +167,18 @@
 /* Define if you have the <ndir.h> header file.  */
 #undef HAVE_NDIR_H
 
+/* Define if you have the <ncurses/termcap.h> header file.  */
+#undef HAVE_NCURSES_TERMCAP_H
+
 /* Define if you have the <pwd.h> header file.  */
 #undef HAVE_PWD_H
 
 /* Define if you have the <stdarg.h> header file.  */
 #undef HAVE_STDARG_H
 
+/* Define if you have the <stdbool.h> header file.  */
+#undef HAVE_STDBOOL_H
+
 /* Define if you have the <stdlib.h> header file.  */
 #undef HAVE_STDLIB_H
 
@@ -168,6 +194,9 @@
 /* Define if you have the <sys/file.h> header file.  */
 #undef HAVE_SYS_FILE_H
 
+/* Define if you have the <sys/ioctl.h> header file.  */
+#undef HAVE_SYS_IOCTL_H
+
 /* Define if you have the <sys/ndir.h> header file.  */
 #undef HAVE_SYS_NDIR_H
 
@@ -218,6 +247,9 @@
 /* Define if you have <langinfo.h> and nl_langinfo(CODESET). */
 #undef HAVE_LANGINFO_CODESET
 
+/* Define if you have <linux/audit.h> and it defines AUDIT_USER_TTY */
+#undef HAVE_DECL_AUDIT_USER_TTY
+
 /* Definitions pulled in from aclocal.m4. */
 #undef VOID_SIGHANDLER
 
@@ -235,9 +267,11 @@
 
 #undef HAVE_GETPW_DECLS
 
-#undef STRUCT_DIRENT_HAS_D_INO
+#undef HAVE_STRUCT_DIRENT_D_INO
+
+#undef HAVE_STRUCT_DIRENT_D_FILENO
 
-#undef STRUCT_DIRENT_HAS_D_FILENO
+#undef HAVE_STRUCT_DIRENT_D_NAMLEN
 
 #undef HAVE_BSD_SIGNALS
 
@@ -259,12 +293,4 @@
 #  define TERMIOS_MISSING
 #endif
 
-#if defined (__STDC__) && defined (HAVE_STDARG_H)
-#  define PREFER_STDARG
-#  define USE_VARARGS
-#else
-#  if defined (HAVE_VARARGS_H)
-#    define PREFER_VARARGS
-#    define USE_VARARGS
-#  endif
-#endif
+/* VARARGS defines moved to rlstdc.h */