boost: fix build when PARALLEL_MAKE is not set

It was passing "None" to bjam, which then parsed it as unknown build target.

(From OE-Core rev: 0a323abab1961caa334035f4f263f1787b3d7cc7)

Signed-off-by: Marko Lindqvist <cazfi74@gmail.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/meta/recipes-support/boost/boost.inc b/meta/recipes-support/boost/boost.inc
index 87bac23340..5d20b11e11 100644
--- a/meta/recipes-support/boost/boost.inc
+++ b/meta/recipes-support/boost/boost.inc
@@ -115,6 +115,8 @@ def get_boost_parallel_make(bb, d):
             bb.error("Unable to analyse format of PARALLEL_MAKE variable: %s" % pm)
         pm_nval = min(64, int(pm_val.group(0)))
         return pm_prefix.group(0) + str(pm_nval) + pm[pm_val.end():]
+    else:
+        return ""
 
 BOOST_PARALLEL_MAKE = "${@get_boost_parallel_make(bb, d)}"
 BJAM_OPTS    = '${BOOST_PARALLEL_MAKE} \