Re: [patch] gdb.exp (INTERNAL_GDBFLAGS): Don't override value provided by user.

[Doug Evans <dje@google.com>]

On Thu, Feb 4, 2010 at 7:49 AM, Tom Tromey <tromey@redhat.com> wrote:
>>>>>> "Doug" == Doug Evans <dje@google.com> writes:
>
> Doug> I will check this in tomorrow if there are no objections.
>
> I think it is fine, but it could use an addition to the testsuite
> documentation in gdbint.texinfo.

How about this?

2010-02-05  Doug Evans  <dje@google.com>

        testsuite/
        * lib/gdb.exp (INTERNAL_GDBFLAGS): Don't override value provided by
        user.

        doc/
        * gdbint.texinfo (Testsuite): Document INTERNAL_GDBFLAGS.

Index: testsuite/lib/gdb.exp
===================================================================
RCS file: /cvs/src/src/gdb/testsuite/lib/gdb.exp,v
retrieving revision 1.135
diff -u -p -r1.135 gdb.exp
--- testsuite/lib/gdb.exp       14 Jan 2010 21:12:00 -0000      1.135
+++ testsuite/lib/gdb.exp       5 Feb 2010 19:19:39 -0000
@@ -54,7 +54,10 @@ if ![info exists GDBFLAGS] {
 verbose "using GDBFLAGS = $GDBFLAGS" 2

 # INTERNAL_GDBFLAGS contains flags that the testsuite requires.
-set INTERNAL_GDBFLAGS "-nw -nx"
+global INTERNAL_GDBFLAGS
+if ![info exists INTERNAL_GDBFLAGS] {
+    set INTERNAL_GDBFLAGS "-nw -nx"
+}

 # The variable gdb_prompt is a regexp which matches the gdb prompt.
 # Set it if it is not already set.
Index: doc/gdbint.texinfo
===================================================================
RCS file: /cvs/src/src/gdb/doc/gdbint.texinfo,v
retrieving revision 1.317
diff -u -p -r1.317 gdbint.texinfo
--- doc/gdbint.texinfo  5 Feb 2010 18:30:44 -0000       1.317
+++ doc/gdbint.texinfo  5 Feb 2010 19:19:40 -0000
@@ -7647,6 +7647,33 @@ different gdbserver.
 make check RUNTESTFLAGS="GDB=/usr/bin/gdb GDBSERVER=/usr/bin/gdbserver"
 @end smallexample

+@item @code{INTERNAL_GDBFLAGS}
+
+When running the testsuite normally one doesn't want whatever is in
+@file{~/.gdbinit} to interfere with the tests, therefore the test harness
+passes @option{-nx} to @value{GDBN}.  One also doesn't want any windowed
+version of @value{GDBN}, e.g., @command{gdbtui}, to run.
+This is achieved via @code{INTERNAL_GDBFLAGS}.
+
+@smallexample
+set INTERNAL_GDBFLAGS "-nw -nx"
+@end smallexample
+
+This is all well and good, except when testing an installed @value{GDBN}
+that has been configured with @option{--with-system-gdbinit}.  Here one
+does not want @file{~/.gdbinit} loaded but one may want the system
+@file{.gdbinit} file loaded.  This can be achieved by pointing @code{$HOME}
+at a directory without a @file{.gdbinit} and by overriding
+@code{INTERNAL_GDBFLAGS} and removing @option{-nx}.
+
+@smallexample
+cd testsuite
+HOME=`pwd` runtest \
+  GDB=/usr/bin/gdb \
+  GDBSERVER=/usr/bin/gdbserver \
+  INTERNAL_GDBFLAGS=-nw
+@end smallexample
+
 @end itemize

 There are two ways to run the testsuite and pass additional parameters