d2896df821
The property based toolchain integration allows a cleaner design by letting the toolchain define its properties and values and let CMake implementation of Zephyr provided C and C++ libraries adjust those properties when minimal C or C++ libraries are used. This commit moves handling of C++ linker library properties into the minimal C++ CMake implementation. Signed-off-by: Torsten Rasmussen <Torsten.Rasmussen@nordicsemi.no>
37 lines
1.7 KiB
CMake
37 lines
1.7 KiB
CMake
# Copyright (c) 2024 Nordic Semiconductor
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#
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# SPDX-License-Identifier: Apache-2.0
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# Do not specify default link libraries when targeting host (native build).
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if(NOT CONFIG_NATIVE_BUILD)
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set_linker_property(NO_CREATE PROPERTY c_library "-lc")
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set_linker_property(NO_CREATE PROPERTY rt_library "-lgcc")
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set_linker_property(NO_CREATE PROPERTY c++_library "-lstdc++")
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set_linker_property(NO_CREATE PROPERTY math_library "-lm")
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# Keeping default include dir empty. The linker will then select libraries
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# from its default search path. The toolchain may adjust the value to a
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# specific location, for example gcc infrastructure will set the value based
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# on output from --print-libgcc-file-name.
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set_linker_property(NO_CREATE PROPERTY lib_include_dir "")
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endif()
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if(CONFIG_CPP
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AND NOT CONFIG_NATIVE_LIBRARY
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# When new link principle is fully introduced, then the below condition can
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# be removed, and instead the external module c++ should use:
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# set_property(TARGET linker PROPERTY c++_library "<external_c++_lib>")
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AND NOT CONFIG_EXTERNAL_MODULE_LIBCPP
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)
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set_property(TARGET linker PROPERTY link_order_library "c++")
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endif()
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if(CONFIG_NEWLIB_LIBC AND CMAKE_C_COMPILER_ID STREQUAL "GNU")
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# We are using c;rt;c (expands to '-lc -lgcc -lc') in code below.
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# This is needed because when linking with newlib on aarch64, then libgcc has a
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# link dependency to libc (strchr), but libc also has dependencies to libgcc.
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# Lib C depends on libgcc. e.g. libc.a(lib_a-fvwrite.o) references __aeabi_idiv
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set_property(TARGET linker APPEND PROPERTY link_order_library "math;c;rt;c")
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else()
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set_property(TARGET linker APPEND PROPERTY link_order_library "c;rt")
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endif()
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