[OE-core] [PATCH V4 3/4] toolchain-scripts.bbclass: do not extend dependency if extended already

[Robert Yang]

From: Kai Kang <kai.kang at windriver.com>

When set MULTILIBS with two or more items, such as for mips64:

MULTILIBS ?= "multilib:lib32 multilib:libn32"

It expands dependency once in mutlib.bbclass, and expand again in
toolchain-scripts.bbclass which causes error:

| ERROR: Nothing PROVIDES 'virtual/lib32-libn32-libc'. Close matches:
|   virtual/libn32-libc
|   virtual/lib32-libc
|   virtual/libn32-librpc
| ERROR: Required build target 'libn32-meta-ide-support' has no buildable providers.
| Missing or unbuildable dependency chain was: ['libn32-meta-ide-support', 'virtual/lib32-libn32-libc']

Signed-off-by: Kai Kang <kai.kang at windriver.com>
Signed-off-by: Robert Yang <liezhi.yang at windriver.com>
---
 meta/classes/toolchain-scripts.bbclass | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/meta/classes/toolchain-scripts.bbclass b/meta/classes/toolchain-scripts.bbclass
index 0ff5301..926be8b 100644
--- a/meta/classes/toolchain-scripts.bbclass
+++ b/meta/classes/toolchain-scripts.bbclass
@@ -190,7 +190,18 @@ python __anonymous () {
     deps = ""
     for dep in (d.getVar('TOOLCHAIN_NEED_CONFIGSITE_CACHE') or "").split():
         deps += " %s:do_populate_sysroot" % dep
-        for variant in (d.getVar('MULTILIB_VARIANTS') or "").split():
+        ml_variants = (d.getVar('MULTILIB_VARIANTS') or "").split()
+
+        # don't extend if dep has been extended already
+        extended = False
+        for variant in ml_variants:
+            if dep.startswith(variant) or dep.startswith('virtual/' + variant):
+                extended = True
+                break
+        if extended:
+            continue
+
+        for variant in ml_variants:
             clsextend = oe.classextend.ClassExtender(variant, d)
             newdep = clsextend.extend_name(dep)
             deps += " %s:do_populate_sysroot" % newdep
-- 
2.7.4