java.bbclass: move openjdk/icedtea specific code into new class

The code moved is not relevant to anything using java, just for
compiling java itself. It doesn't make sense to have here.

Move it into openjdk-build-helper

Signed-off-by: André Draszik <andre.draszik@jci.com>
Signed-off-by: Richard Leitner <richard.leitner@skidata.com>

1 files changed, 16 insertions, 0 deletions

diff --git a/classes/openjdk-build-helper.bbclass b/classes/openjdk-build-helper.bbclass
new file mode 100644
index 0000000..785ddf0
--- /dev/null
+++ b/classes/openjdk-build-helper.bbclass
@@ -0,0 +1,16 @@
+# Icedtea's makefile is not compatible to parallelization so we cannot allow
+# passing a valid ${PARALLEL_MAKE} to it. OTOH OpenJDK's makefiles are
+# parallelizable and we need ${PARALLEL_MAKE} to derive the proper value.
+# The base for this quirk is that GNU Make only considers the last "-j" option.
+EXTRA_OEMAKE_remove_task-compile = "${PARALLEL_MAKE}"
+EXTRA_OEMAKE_remove_task-install = "${PARALLEL_MAKEINST}"
+
+# OpenJDK supports parallel compilation but uses a plain number for this.
+# In OE we have PARALLEL_MAKE which is the actual option passed to make,
+# e.g. "-j 4".
+def openjdk_build_helper_get_parallel_make(d):
+    pm = d.getVar('PARALLEL_MAKE', True);
+    if not pm or '-j' not in pm:
+        return 1
+
+    return pm.partition('-j')[2].strip().split(' ')[0]