Re: [PATCH] Clear GREP_OPTIONS environment variable.

["Andrew Burgess" <aburgess@broadcom.com>]

On 16/03/2011 16:14, Joel Brobecker wrote:
>> Andrew>  The test gdb.base/maint.exp shells out from gdb to use grep. I
>> Andrew>  have GREP_OPTIONS="--color=auto" in my environment and this
>> Andrew>  causes the test to fail. The patch below clears this environment
>> Andrew>  variable before running gdb. Ok to apply?
>>
>> Andrew>  2011-03-15  Andrew Burgess<aburgess@broadcom.com>
>> Andrew>  	* lib/gdb.exp (default_gdb_start): Clear the GREP_OPTIONS
>> Andrew>  	environment variable to make grep output more predictable.
>>
>> Ok.
> 
> I think that this is OK too.  However, I'm wondering whether, as
> a followup, we should be moving this type of code to the gdb_init
> routine, rather than putting it there.  The idea is to run this
> once per testcase, rather than once everytime we start a new GDB
> process.
> 

So the patch below moves the environment setup into gdb_init. I don't see any regressions here. If this is preferred then I can commit this instead of the original patch.


Cheers,
Andrew


gdb/testsuite/ChangeLog

2011-03-15  Andrew Burgess  <aburgess@broadcom.com>

	* lib/gdb.exp (default_gdb_start,gdb_init): Clear the GREP_OPTIONS
	environment variable to make grep output more predictable. Move
	all the environment setup into gdb_init so it's done once per test
	case rather than each time we start gdb.

 	* gdb.arch/altivec-abi.exp: Skip "generic" tests on 64-bit when
diff --git a/gdb/testsuite/lib/gdb.exp b/gdb/testsuite/lib/gdb.exp
index 1b601af..7be05d1 100644
--- a/gdb/testsuite/lib/gdb.exp
+++ b/gdb/testsuite/lib/gdb.exp
@@ -1316,21 +1316,6 @@ proc default_gdb_start { } {
 
     gdb_stop_suppressing_tests;
 
-    set env(LC_CTYPE) C
-
-    # Don't let a .inputrc file or an existing setting of INPUTRC mess up
-    # the test results.  Even if /dev/null doesn't exist on the particular
-    # platform, the readline library will use the default setting just by
-    # failing to open the file.  OTOH, opening /dev/null successfully will
-    # also result in the default settings being used since nothing will be
-    # read from this file.
-    set env(INPUTRC) "/dev/null"
-
-    # The gdb.base/readline.exp arrow key test relies on the standard VT100
-    # bindings, so make sure that an appropriate terminal is selected.
-    # The same bug doesn't show up if we use ^P / ^N instead.
-    set env(TERM) "vt100"
-
     verbose "Spawning $GDB $INTERNAL_GDBFLAGS $GDBFLAGS"
 
     if [info exists gdb_spawn_id] {
@@ -2797,11 +2782,30 @@ proc gdb_init { args } {
 	set banned_variables_traced 1
     }
 
-    # We set LC_ALL and LANG to C so that we get the same messages as
-    # expected.
+    # We set LC_ALL, LC_CTYPE, and LANG to C so that we get the same
+    # messages as expected.
     setenv LC_ALL C
+    setenv LC_CTYPE C
     setenv LANG C
 
+    # Don't let a .inputrc file or an existing setting of INPUTRC mess up
+    # the test results.  Even if /dev/null doesn't exist on the particular
+    # platform, the readline library will use the default setting just by
+    # failing to open the file.  OTOH, opening /dev/null successfully will
+    # also result in the default settings being used since nothing will be
+    # read from this file.
+    setenv INPUTRC "/dev/null"
+
+    # The gdb.base/readline.exp arrow key test relies on the standard VT100
+    # bindings, so make sure that an appropriate terminal is selected.
+    # The same bug doesn't show up if we use ^P / ^N instead.
+    setenv TERM "vt100"
+
+    # Some tests (for example gdb.base/maint.exp) shell out from gdb to use
+    # grep.  Clear GREP_OPTIONS to make the behavoiur predictable, 
+    # especially having color output turned on can cause tests to fail.
+    setenv GREP_OPTIONS ""
+
     return [eval default_gdb_init $args];
 }