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llext: additional CMake harmonizations #67997

Merged
merged 4 commits into from
Apr 8, 2024
Merged

llext: additional CMake harmonizations #67997

merged 4 commits into from
Apr 8, 2024

Commits on Mar 20, 2024

  1. cmake: conditionally enable shared library support 

    When CONFIG_LLEXT is enabled, the Zephyr platform needs to enable dynamic
library support. This is done by setting the `TARGET_SUPPORTS_SHARED_LIBS`
property to `TRUE` in the global property scope.

Signed-off-by: Luca Burelli <l.burelli@arduino.cc>
    @pillo79
    pillo79 committed Mar 20, 2024
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  2. llext: use CMake shared library support on Xtensa 

    This change reworks the Xtensa support in llext to use CMake's native
shared library support, instead of manually running "gcc -shared".

This change minimizes the differences in llext handling by defining
appropriate CMake targets for the different architectures.

Signed-off-by: Luca Burelli <l.burelli@arduino.cc>
    @pillo79
    pillo79 committed Mar 20, 2024
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  3. llext: add llext_* configuration functions 

    Remove the C_FLAGS argument from add_llext_target() and add a set of
functions to configure the compilation and linking of an llext using
the same API of the target_* functions.

Signed-off-by: Luca Burelli <l.burelli@arduino.cc>
    @pillo79
    pillo79 committed Mar 20, 2024
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  4. llext: add support for build time custom commands 

    This patch adds support for custom commands to be executed during the
build of an llext target. The commands can be executed at different
points in the build process:

 - PRE_BUILD:  Before the llext code is linked.
 - POST_BUILD: After the llext code is built, but before packaging
	       it in an .llext file.
 - POST_PKG:   After the llext file has been created.

Note that PRE_BUILD is not supported for ARM targets, as in that case
object files are used directly and there is no actual linking step.

The commands can be added using the new add_llext_command() function.
An example usage of it, along with some target properties, is added to
the hello_world test case.

Signed-off-by: Luca Burelli <l.burelli@arduino.cc>
    @pillo79
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