openjdk-8-native: fix improper do_install and PROVIDES

We had:
virtual/jar-native provided by fastjar-native
virtual/java-native provided by cacao-native and jamvm-native
virtual/javac-native provided by ecj-bootstrap-native

Then openjdk-8-native added and also provides:
virtual/java-native and virtual/javac-native
(it also installs ${STAGING_BINDIR_NATIVE}/jar but
doesn't add virtual/jar-native in the PROVIDES)

which introduces circular dependencies,
java-bootstrap-components.bbclass is to avoid the
circular dependencies but it's not a correct way
since it make two conflicted packages build into
the same sysroot:

DEPENDS_prepend_class-native = " ecj-bootstrap-native "
DEPENDS_prepend_class-target = " virtual/javac-native "

virtual/javac-native is provided by openjdk-8-native,
and it assumed that ecj-bootstrap-native, fastjar-native and
cacao-native/jamvm-native are always built before openjdk-8-native,
then in the do_install of penjdk-8-native, it removes them from
staging dirs first, then install (create symlinks for) these files
in staging dirs directly, which results with empty sstate and
builds from sstate cache or builds not in this assumption
will fail.

The fixes here includes:
- Revert "meta-java: rely on well known bootstrap-path" in
  previous commit to remove the improper
  java-bootstrap-components.bbclass

- Do not let openjdk-8-native provides jar, java and javac,
  just like what we do in icedtea7-native, which can provides
  but not to avoid circular dependencies and conflicts.

- make cacao-native back to provide virtual/java-native,
  and ecj-bootstrap-native back to provide virtual/javac-native

- Add back provider settings in README.

- Remove the update-alternatives in openjdk-8-native,
  it doesn't work for native package.

Signed-off-by: Jackie Huang <jackie.huang@windriver.com>

1 files changed, 10 insertions, 2 deletions

diff --git a/README b/README
index 7658c23..259fa75 100644
--- a/README
+++ b/README
@@ -52,8 +52,16 @@ Main layer maintainers:
 Usage instructions
 ------------------
 
-Since there is a clear bootstrap of the individual java-recipes, there is
-nothing to configure in conf/local.conf nor your individual distro/$name.conf.
+You should define at least the following variables in a distro include file or local.conf
+
+# Possible provider: cacao-initial-native and jamvm-initial-native
+PREFERRED_PROVIDER_virtual/java-initial-native = "cacao-initial-native"
+
+# Possible provider: cacao-native and jamvm-native
+PREFERRED_PROVIDER_virtual/java-native = "jamvm-native"
+
+# Optional since there is only one provider for now
+PREFERRED_PROVIDER_virtual/javac-native = "ecj-bootstrap-native"
 
 Simply rely on openjdk-7-jre, openjdk-7, openjdk-8 or openjre-8.