Avoid parse time errors due to dependency on x11, for distros without x11

BitBake raises some errors when processing recipes that depend on x11
for distros that don't have x11 in DISTRO_FEATURES. To work around
that issue, REQUIRED_DISTRO_FEATURES = "x11" (from
distro_features_check.bbclass) has been set for the following recipes:

* cacao (_class-target)
* classpath (_class-target)
* jamvm (_class-target)
* openjdk-7-release

That makes BitBake skip those recipes during the cache generation
(they'd still be parsed, but ignored).

This patch improves the idea from Mario Domenech Goulart <mario@ossystems.com.br>

Signed-off-by: Jens Rehsack <sno@netbsd.org>
Acked-by: Richard Leitner <richard.leitner@skidata.com>
Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>

1 files changed, 4 insertions, 0 deletions

diff --git a/recipes-core/classpath/classpath_0.99.bb b/recipes-core/classpath/classpath_0.99.bb
index 8b3a6e3..6aa3baa 100644
--- a/recipes-core/classpath/classpath_0.99.bb
+++ b/recipes-core/classpath/classpath_0.99.bb
@@ -1,5 +1,9 @@
 require classpath.inc
 
+inherit distro_features_check
+
+REQUIRED_DISTRO_FEATURES = "x11"
+
 LIC_FILES_CHKSUM = "file://LICENSE;md5=92acc79f1f429143f4624d07b253702a"
 
 SRC_URI += " \