classes/base: don't print header if BUILDCFG_HEADER not set

If we don't want a header printed at the start of task execution (which
we'd prefer not to within the extensible SDK)  we can accomplish that by
clearing BUILDCFG_VARS and BUILDCFG_HEADER, but that was still printing
a load of blank lines. To keep things simple, check if BUILDCFG_HEADER
is set to something before printing a header.

(From OE-Core rev: d896d77c1d0fc56ff7019bfee3cf06fbc3ede8f3)

Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 2 insertions, 1 deletions

diff --git a/meta/classes/base.bbclass b/meta/classes/base.bbclass
index f856298fb5..5fc92718a4 100644
--- a/meta/classes/base.bbclass
+++ b/meta/classes/base.bbclass
@@ -230,7 +230,8 @@ python base_eventhandler() {
                     statuslines.extend(flines)
 
         statusheader = e.data.getVar('BUILDCFG_HEADER', True)
-        bb.plain('\n%s\n%s\n' % (statusheader, '\n'.join(statuslines)))
+        if statusheader:
+            bb.plain('\n%s\n%s\n' % (statusheader, '\n'.join(statuslines)))
 
     # This code is to silence warnings where the SDK variables overwrite the 
     # target ones and we'd see dulpicate key names overwriting each other