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cmake: conditionally enable shared library support

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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>
This commit is contained in:
Luca Burelli 2024-03-18 16:01:51 +01:00 • committed by Carles Cufí
commit f61b003b07
2 changed files with 20 additions and 3 deletions
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10
cmake/modules/FindTargetTools.cmake
View file

@ -31,7 +31,8 @@ endif()
set(CMAKE_C_COMPILER_FORCED 1) set(CMAKE_C_COMPILER_FORCED 1)
set(CMAKE_CXX_COMPILER_FORCED 1) set(CMAKE_CXX_COMPILER_FORCED 1)
# No official documentation exists for the "Generic" value, except their wiki. # https://cmake.org/cmake/help/latest/variable/CMAKE_SYSTEM_NAME.html:
# The name of the operating system for which CMake is to build.
# #
# https://gitlab.kitware.com/cmake/community/wikis/doc/cmake/CrossCompiling: # https://gitlab.kitware.com/cmake/community/wikis/doc/cmake/CrossCompiling:
# CMAKE_SYSTEM_NAME : this one is mandatory, it is the name of the target # CMAKE_SYSTEM_NAME : this one is mandatory, it is the name of the target
@ -40,7 +41,10 @@ set(CMAKE_CXX_COMPILER_FORCED 1)
# variable is used for constructing the file names of the platform files # variable is used for constructing the file names of the platform files
# like Linux.cmake or Windows-gcc.cmake. If your target is an embedded # like Linux.cmake or Windows-gcc.cmake. If your target is an embedded
# system without OS set CMAKE_SYSTEM_NAME to "Generic". # system without OS set CMAKE_SYSTEM_NAME to "Generic".
set(CMAKE_SYSTEM_NAME Generic) #
# This will force CMake to load cmake/modules/Platform/Zephyr.cmake,
# allowing Zephyr-specific embedded system features to be enabled.
set(CMAKE_SYSTEM_NAME Zephyr)
# https://cmake.org/cmake/help/latest/variable/CMAKE_SYSTEM_PROCESSOR.html: # https://cmake.org/cmake/help/latest/variable/CMAKE_SYSTEM_PROCESSOR.html:
# The name of the CPU CMake is building for. # The name of the CPU CMake is building for.
@ -74,7 +78,7 @@ else()
set(CMAKE_CXX_BYTE_ORDER LITTLE_ENDIAN) set(CMAKE_CXX_BYTE_ORDER LITTLE_ENDIAN)
endif() endif()
# We are not building dynamically loadable libraries # Do not build dynamically loadable libraries by default
set(BUILD_SHARED_LIBS OFF) set(BUILD_SHARED_LIBS OFF)
# Custom targets for compiler and linker flags. # Custom targets for compiler and linker flags.

13
cmake/modules/Platform/Zephyr.cmake Normal file
View file

@ -0,0 +1,13 @@
# SPDX-License-Identifier: Apache-2.0
#
# Copyright (c) 2024, Arduino SA
# Perform the same initialization as the Generic platform, then enable
# dynamic library support if CONFIG_LLEXT is enabled.
include(Platform/Generic)
# Enable dynamic library support when CONFIG_LLEXT is enabled.
if(CONFIG_LLEXT)
set_property(GLOBAL PROPERTY TARGET_SUPPORTS_SHARED_LIBS true)
endif()