[PATCH] sstate: Allow late expansion of NATIVELSBSTRING

[Richard Purdie <richard.purdie@linuxfoundation.org>]

uninative needs to adjust NATIVELSBSTRING fairly late in the
configuration parsing process but the sstate code encodes it into
variables. Since this string doesn't vary on a per recipe basis, we
defer its expansion until usage time.

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

diff --git a/meta/classes/sstate.bbclass b/meta/classes/sstate.bbclass
index 3499d2e..6f285da 100644
--- a/meta/classes/sstate.bbclass
+++ b/meta/classes/sstate.bbclass
@@ -31,7 +31,7 @@ SSTATE_DUPWHITELIST += "${DEPLOY_DIR_SRC}"
 SSTATE_SCAN_FILES ?= "*.la *-config *_config"
 SSTATE_SCAN_CMD ?= 'find ${SSTATE_BUILDDIR} \( -name "${@"\" -o -name \"".join(d.getVar("SSTATE_SCAN_FILES", True).split())}" \) -type f'
 
-BB_HASHFILENAME = "${SSTATE_EXTRAPATH} ${SSTATE_PKGSPEC} ${SSTATE_SWSPEC}"
+BB_HASHFILENAME = "False ${SSTATE_PKGSPEC} ${SSTATE_SWSPEC}"
 
 SSTATE_ARCHS = " \
     ${BUILD_ARCH} \
@@ -79,6 +79,7 @@ python () {
 
     if bb.data.inherits_class('native', d) or bb.data.inherits_class('crosssdk', d) or bb.data.inherits_class('cross', d):
         d.setVar('SSTATE_EXTRAPATH', "${NATIVELSBSTRING}/")
+        d.setVar('BB_HASHFILENAME', "True ${SSTATE_PKGSPEC} ${SSTATE_SWSPEC}")
         d.setVar('SSTATE_EXTRAPATHWILDCARD', "*/")
 
     # These classes encode staging paths into their scripts data so can only be
@@ -721,7 +722,10 @@ def sstate_checkhashes(sq_fn, sq_task, sq_hash, sq_hashfn, d, siginfo=False):
         # Magic data from BB_HASHFILENAME
         splithashfn = sq_hashfn[task].split(" ")
         spec = splithashfn[1]
-        extrapath = splithashfn[0]
+        if splithashfn[0] == "True":
+            extrapath = d.getVar("NATIVELSBSTRING", True) + "/"
+        else:
+            extrapath = ""
 
         tname = sq_task[task][3:]