[libcamera-devel] [PATCH 0/5] Support loading IPAs from the build tree

[Nicolas Dufresne]

Le mer. 5 févr. 2020 08 h 04, Kieran Bingham <
kieran.bingham at ideasonboard.com> a écrit :

> When developing and testing libcamera, the usual development model is to
> compile and run one of the test or utility applications.
>

I like it. Be aware that it won't work for me. It only work if the build
path matches run path, which isn't the case when cross compiling and
exporting over NFS. Any suggestion ?


> IPA modules are loaded by the IPAManager, from a system path, or by
> parsing an
> environment variable.
>
> Provide the build path to the library through a temporary storage in the
> runpath of the ELF library strings table.  This entry is stripped at
> install
> time, but allows us to identify the location of the recently compiled IPA
> modules without the user having to manually declare paths to the build
> system.
>
> Previously to this series the IPA tests would only be able to be run from
> the
> root of the build tree, due to the hardcoded path relative to that point.
> Now
> that the IPAs can be found from their build location, we no longer need to
> provide this hardcoded path through the LIBCAMERA_IPA_MODULE_PATH for
> tests,
> and as a further consequence they can be run directly without requiring the
> launch to be run from the top level of the build tree.
>
> Kieran Bingham (5):
>   libcamera: utils: Provide helper to get dynamic library runpath
>   libcamera: ipa_manager: Split path handling
>   libcamera: ipa_manager: Allow recursive parsing
>   libcamera: ipa_manager: Search the runpath for IPA libraries
>   tests: Remove IPA_MODULE_PATH environment variable
>
>  src/libcamera/include/ipa_manager.h |   5 +-
>  src/libcamera/include/utils.h       |   1 +
>  src/libcamera/ipa_manager.cpp       | 111 ++++++++++++++++++++++------
>  src/libcamera/meson.build           |   1 +
>  src/libcamera/utils.cpp             |  26 +++++++
>  src/meson.build                     |   7 ++
>  test/libtest/test.cpp               |   4 -
>  7 files changed, 126 insertions(+), 29 deletions(-)
>
> --
> 2.20.1
>
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>
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