[OE-core] [PATCH 2/3] cmake: prefer CMAKE_BUILD_PARALLEL_LEVEL

[Dan McGregor]

From: Daniel McGregor <daniel.mcgregor at vecima.com>

cmake 3.12 introduced this environment variable. Prefer it to passing
PARALLEL_MAKE and PARALLEL_MAKEINST on the cmake command line, because
it gets passed to second stage cmake invocations while command-line
arguments do not (for example, multi-stage clang builds)

Signed-off-by: Daniel McGregor <daniel.mcgregor at vecima.com>
---
 meta/classes/cmake.bbclass |  5 +++--
 meta/lib/oe/utils.py       | 11 +++++++----
 2 files changed, 10 insertions(+), 6 deletions(-)

diff --git a/meta/classes/cmake.bbclass b/meta/classes/cmake.bbclass
index a046daa6ea..d91cf20130 100644
--- a/meta/classes/cmake.bbclass
+++ b/meta/classes/cmake.bbclass
@@ -63,8 +63,9 @@ OECMAKE_FIND_ROOT_PATH_MODE_PROGRAM_class-native = "BOTH"
 
 EXTRA_OECMAKE_append = " ${PACKAGECONFIG_CONFARGS}"
 
-EXTRA_OECMAKE_BUILD_prepend_task-compile = "${PARALLEL_MAKE} "
-EXTRA_OECMAKE_BUILD_prepend_task-install = "${PARALLEL_MAKEINST} "
+export CMAKE_BUILD_PARALLEL_LEVEL
+CMAKE_BUILD_PARALLEL_LEVEL_task-compile = "${@oe.utils.parallel_make(d, False)}"
+CMAKE_BUILD_PARALLEL_LEVEL_task-install = "${@oe.utils.parallel_make(d, True)}"
 
 OECMAKE_TARGET_COMPILE ?= "all"
 OECMAKE_TARGET_INSTALL ?= "install"
diff --git a/meta/lib/oe/utils.py b/meta/lib/oe/utils.py
index 652b2be145..e350b05ddf 100644
--- a/meta/lib/oe/utils.py
+++ b/meta/lib/oe/utils.py
@@ -169,7 +169,7 @@ def any_distro_features(d, features, truevalue="1", falsevalue=""):
     """
     return bb.utils.contains_any("DISTRO_FEATURES", features, truevalue, falsevalue, d)
 
-def parallel_make(d):
+def parallel_make(d, makeinst=False):
     """
     Return the integer value for the number of parallel threads to use when
     building, scraped out of PARALLEL_MAKE. If no parallelization option is
@@ -177,7 +177,10 @@ def parallel_make(d):
 
     e.g. if PARALLEL_MAKE = "-j 10", this will return 10 as an integer.
     """
-    pm = (d.getVar('PARALLEL_MAKE') or '').split()
+    if makeinst:
+        pm = (d.getVar('PARALLEL_MAKEINST') or '').split()
+    else:
+        pm = (d.getVar('PARALLEL_MAKE') or '').split()
     # look for '-j' and throw other options (e.g. '-l') away
     while pm:
         opt = pm.pop(0)
@@ -192,7 +195,7 @@ def parallel_make(d):
 
     return None
 
-def parallel_make_argument(d, fmt, limit=None):
+def parallel_make_argument(d, fmt, limit=None, makeinst=False):
     """
     Helper utility to construct a parallel make argument from the number of
     parallel threads specified in PARALLEL_MAKE.
@@ -205,7 +208,7 @@ def parallel_make_argument(d, fmt, limit=None):
     e.g. if PARALLEL_MAKE = "-j 10", parallel_make_argument(d, "-n %d") will return
     "-n 10"
     """
-    v = parallel_make(d)
+    v = parallel_make(d, makeinst)
     if v:
         if limit:
             v = min(limit, v)
-- 
2.24.1