relocatable.bbclass: remove hard-coded rpaths from native binaries

The relocatable path will pre-process built binaries in SYSROOT_DESTDIR and
replace any harcoded dynamic link rpaths with relative paths.

Add an inherit of class in native.bbclass to make our native packages
relocatable and tweak the chrpath recipe so that the native package can make
itself relocatable with the just built chrpath binary.

Signed-off-by: Joshua Lock <josh@linux.intel.com>

2 files changed, 27 insertions, 0 deletions

diff --git a/meta/classes/native.bbclass b/meta/classes/native.bbclass
index 01f886294..9d678fd80 100644
--- a/meta/classes/native.bbclass
+++ b/meta/classes/native.bbclass
@@ -1,3 +1,6 @@
+# We want native packages to be relocatable
+inherit relocatable
+
 # Native packages are built indirectly via dependency,
 # no need for them to be a direct target of 'world'
 EXCLUDE_FROM_WORLD = "1"
diff --git a/meta/classes/relocatable.bbclass b/meta/classes/relocatable.bbclass
new file mode 100644
index 000000000..81fe8c518
--- /dev/null
+++ b/meta/classes/relocatable.bbclass
@@ -0,0 +1,24 @@
+SYSROOT_PREPROCESS_FUNCS += "relocatable_binaries_preprocess"
+
+CHRPATH_BIN ?= "chrpath"
+
+def rpath_replace (paths, d):
+    chrpath = bb.data.expand('${CHRPATH_BIN}', d)
+
+    for path in paths:
+        for root, dirs, files in os.walk(path):
+            for f in files:
+                if 'usr' in path:
+                    os.system("%s -r $ORIGIN/../lib:$ORIGIN/../../lib %s/%s" % (chrpath, path,f))
+                else:
+                    os.system("%s -r $ORIGIN/../lib %s/%s" % (chrpath, path, f))
+
+python relocatable_binaries_preprocess() {
+    paths = []
+    target = bb.data.expand("${SYSROOT_DESTDIR}${TMPDIR}/sysroots/${TARGET_ARCH}-${TARGET_OS}", d)
+
+    paths.append(target + "/bin")
+    paths.append(target + "/usr/bin")
+
+    rpath_replace(paths, d)
+}