[OE-core] [PATCH 2/2] scons.bbclass: reduce build time by adding PARALLEL_MAKEINST to scons install params

[Andreas Müller]

During install all files are recompiled. This should be investigated further
later. Currently only one file is recompiled at the same time. Reduce install
time significantly by setting PARALLEL_MAKEINST option in do_install task.

Measured with recipes inheriting scons (gpsd do_compile broken for me) by
the following sequence:

without this patch:
bitbake pingus mongodb mixxx
bitbake -ccleansstate pingus mongodb mixxx
time bitbake pingus mongodb mixxx
...
real	48m5.467s
user	138m47.763s
sys	11m9.423s

with this patch
bitbake -ccleansstate pingus mongodb mixxx
time bitbake pingus mongodb mixxx
...
real	27m28.521s
user	146m59.951s
sys	10m56.218s

Signed-off-by: Andreas Müller <schnitzeltony at googlemail.com>
---
 meta/classes/scons.bbclass | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/meta/classes/scons.bbclass b/meta/classes/scons.bbclass
index 1579b05..4f84ec0 100644
--- a/meta/classes/scons.bbclass
+++ b/meta/classes/scons.bbclass
@@ -10,7 +10,7 @@ scons_do_compile() {
 }
 
 scons_do_install() {
-        ${STAGING_BINDIR_NATIVE}/scons PREFIX=${D}${prefix} prefix=${D}${prefix} install ${EXTRA_OESCONS}|| \
+        ${STAGING_BINDIR_NATIVE}/scons ${PARALLEL_MAKEINST} PREFIX=${D}${prefix} prefix=${D}${prefix} install ${EXTRA_OESCONS}|| \
         die "scons install execution failed."
 }
 
-- 
2.5.5