W dniu 05.04.2013 11:20, Marcin Juszkiewicz pisze:
> ERROR: Multiple .bb files are due to be built which each provide virtual/libc
> (/home/hrw/HDD/devel/canonical/aarch64/openembedded/repos/openembedded-core/meta/recipes-core/eglibc/eglibc_2.17.bb
>
> /home/hrw/HDD/devel/canonical/aarch64/openembedded/repos/meta-linaro/meta-linaro-toolchain/recipes-devtools/external-linaro-toolchain/external-linaro-toolchain.bb).
> This usually means one provides something the other doesn't and should.
Let's enable debug:
DEBUG: providers for virtual/libc are: ['eglibc', 'external-linaro-toolchain']
NOTE: selecting external-linaro-toolchain to satisfy virtual/libc due to
PREFERRED_PROVIDERS
DEBUG: sorted providers for virtual/libc are:
['/home/hrw/HDD/devel/canonical/aarch64/openembedded/repos/meta-linaro/meta-linaro-toolchain/recipes-devtools/external-linaro-toolchain/external-linaro-toolchain.bb',
'/home/hrw/HDD/devel/canonical/aarch64/openembedded/repos/openembedded-core/meta/recipes-core/eglibc/eglibc_2.17.bb']
DEBUG: adding
/home/hrw/HDD/devel/canonical/aarch64/openembedded/repos/meta-linaro/meta-linaro-toolchain/recipes-devtools/external-linaro-toolchain/external-linaro-toolchain.bb
to satisfy virtual/libc
DEBUG: adding
/home/hrw/HDD/devel/canonical/aarch64/openembedded/repos/openembedded-core/meta/recipes-core/eglibc/eglibc_2.17.bb
to satisfy virtual/libc
And now - let's dig deep into BitBake code. We want two files:
- lib/bb/providers.py
- lib/bb/taskdata.py
1. Bitbake jumps into taskdata/add_provider_internal().
2. Then asks bb.providers.filterProviders()
"is there any provider for 'virtual/libc'"?
3. In providers/_filterProviders this output is printed:
"DEBUG: providers for virtual/libc are: ['eglibc',
'external-linaro-toolchain']"
4. providers/filterProviders() (note lack of "_") checks for
PREFERRED_PROVIDER_virtual/libc and outputs:
NOTE: selecting external-linaro-toolchain to satisfy virtual/libc due to
PREFERRED_PROVIDERS
sets foundUnique to True, outputs:
DEBUG: sorted providers for virtual/libc are:
['/home/hrw/HDD/devel/canonical/aarch64/openembedded/repos/meta-linaro/meta-linaro-toolchain/recipes-devtools/external-linaro-toolchain/external-linaro-toolchain.bb',
'/home/hrw/HDD/devel/canonical/aarch64/openembedded/repos/openembedded-core/meta/recipes-core/eglibc/eglibc_2.17.bb']
and returns all providers + foundUnique
5. We are back at taskdata/add_provider_internal() and we
have more then one entry in "eligible" array plus
foundUnique set to True.
6. Here we are happy of results and skips two "if" checks.
7. Then we add each entry as good one with this output:
DEBUG: adding
/home/hrw/HDD/devel/canonical/aarch64/openembedded/repos/meta-linaro/meta-linaro-toolchain/recipes-devtools/external-linaro-toolchain/external-linaro-toolchain.bb
to satisfy virtual/libc
DEBUG: adding
/home/hrw/HDD/devel/canonical/aarch64/openembedded/repos/openembedded-core/meta/recipes-core/eglibc/eglibc_2.17.bb
to satisfy virtual/libc
The question is - why providers/filterProviders() returns more
then one entry when it founds that one of them is preferred?
So I got with this change:
diff --git a/lib/bb/providers.py b/lib/bb/providers.py
index fcee6dc..0b37c44 100644
--- a/lib/bb/providers.py
+++ b/lib/bb/providers.py
@@ -296,8 +296,7 @@ def filterProviders(providers, item, cfgData, dataCache):
pn = dataCache.pkg_fn[p]
if dataCache.preferred[item] == pn:
logger.verbose("selecting %s to satisfy %s due to
PREFERRED_PROVIDERS", pn, item)
- eligible.remove(p)
- eligible = [p] + eligible
+ eligible = [p]
foundUnique = True
break
And when I added "eglibc" into PROVIDES in
external-linaro-toolchain.bb I got bitbake pass!!!
NO MULTIPLE RECIPES!!! :D
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