meta-chromium: Add a conditional setting for parent of S

The WORKDIR -> UNPACKDIR transition started with styhead and
whinlatter now requires it:

| S should be set relative to UNPACKDIR, e.g. replace
| WORKDIR with UNPACKDIR in "S = ${WORKDIR}/chromium-${PV}"

Add a new setting that abstracts away the difference between
WORKDIR and UNPACKDIR.

Signed-off-by: Zoltán Böszörményi <[email protected]>

Author: zboszor

meta-chromium/conf/layer.conf

@@ -12,3 +12,14 @@ LAYERVERSION_chromium-browser-layer = "1"
 LAYERSERIES_COMPAT_chromium-browser-layer = "scarthgap styhead walnascar"
 
 LAYERDEPENDS_chromium-browser-layer = "clang-layer core openembedded-layer"
+
+# In whinlatter the UNPACKDIR location has changed, and pathes created using
+# the ${WORKDIR} variable are not valid anymore. However older versions still
+# require these. This fragment contains a list of recipes in the meta-firefox
+# layer that needs their "S" variable modified depending on the used Yocto
+# version.
+
+WHINLATTER_S_PARENT = "${UNPACKDIR}"
+NON_WHINLATTER_S_PARENT = "${WORKDIR}"
+
+CORRECT_S_PARENT = '${@bb.utils.contains_any("LAYERSERIES_CORENAMES", "whinlatter", d.getVar("WHINLATTER_S_PARENT"), d.getVar("NON_WHINLATTER_S_PARENT"), d)}'