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b34f84dce8
At the end of this function, self.overrides is cleared, which means we'll
construct a new self.overrides after this call. And a new self.overrides
will give out different expand_cache, so the old expand_cache should also
be cleared to avoid any wrong value.
Currently, there's a problem revealed by recent recipe specific virtual
provider patch. If we enable multilib and set "OVERRIDES:prepend" in local.conf,
things don't work.
Here's the error message:
ERROR: Nothing PROVIDES 'lib32-gcc-cross-x86_64'
Below are reproduce steps:
1. Add in local.conf the following lines:
MACHINE ?= "qemux86-64"
require conf/multilib.conf
MULTILIBS ?= "multilib:lib32"
DEFAULTTUNE:virtclass-multilib-lib32 ?= "core2-32"
OVERRIDES:prepend = "some-override:"
(Note that using :append and :remove also reproduces the issue.)
2. bitbake -n lib32-sysstat
(bitbake -n core-image-minimal also reproduces the issue)
The expandWithRefs calls getVar, which fills expand_cache. So when setting
OVERRIDES:prepend, this will fill the expand_cache. When overridevars are updated,
if we don't clear expand_cache, we'll retrieve wrong values.
Previously, things happened to work because there's a call to expand
PREFERRED_PROVIDER_virtual/${TARGET_PREFIX}gcc, which in turn expands
TARGET_VENDOR. Now what we expand is PREFERRED_PROVIDER_ virtual/cross-cc,
so the problem is revealed.
(Bitbake rev: 842e94234c9b9faf4e902721f516071f643e49c9)
Signed-off-by: Chen Qi <Qi.Chen@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>