[OE-core] [PATCH 1/1 V2] base.bbclass: Check BuildStarted for HOSTTOOLS

[Robert Yang]

There might be no bb.event.ConfigParsed event if bitbake server is running, so
check bb.event.BuildStarted too to make sure HOSTTOOLS_DIR exists.

Fixed:
$ export BB_SERVER_TIMEOUT=-1
$ bitbake quilt-native
$ rm -fr tmp
$ bitbake quilt-native
ERROR: Error running gcc  --version: /bin/sh: gcc: command not found

This error is caused by enable_uninative(), it runs twice (ConfigParsed and
BuildStarted), the error would happen when there is no ConfigParsed event
(no hosttools is created), but BuildStarted. This patch can fix the problem.

[YOCTO #13022]

Signed-off-by: Robert Yang <liezhi.yang at windriver.com>
---
 meta/classes/base.bbclass | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/meta/classes/base.bbclass b/meta/classes/base.bbclass
index f1a3c0e..8ece51f 100644
--- a/meta/classes/base.bbclass
+++ b/meta/classes/base.bbclass
@@ -228,6 +228,12 @@ python base_eventhandler() {
         if not d.getVar("NATIVELSBSTRING", False):
             d.setVar("NATIVELSBSTRING", lsb_distro_identifier(d))
         d.setVar('BB_VERSION', bb.__version__)
+
+    # There might be no bb.event.ConfigParsed event if bitbake server is
+    # running, so check bb.event.BuildStarted too to make sure ${HOSTTOOLS_DIR}
+    # exists.
+    if isinstance(e, bb.event.ConfigParsed) or \
+            (isinstance(e, bb.event.BuildStarted) and not os.path.exists(d.getVar('HOSTTOOLS_DIR'))):
         # Works with the line in layer.conf which changes PATH to point here
         setup_hosttools_dir(d.getVar('HOSTTOOLS_DIR'), 'HOSTTOOLS', d)
         setup_hosttools_dir(d.getVar('HOSTTOOLS_DIR'), 'HOSTTOOLS_NONFATAL', d, fatal=False)
-- 
2.7.4