51 lines
1.6 KiB
CMake
51 lines
1.6 KiB
CMake
# SPDX-License-Identifier: Apache-2.0
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zephyr_library()
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zephyr_library_sources(libc-hooks.c)
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# Zephyr normally uses -ffreestanding, which with current GNU toolchains
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# means that the flag macros used by newlib 3.x <inttypes.h> to signal
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# support for PRI.64 macros are not present. To make them available we
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# need to hook into the include path before the system files and
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# explicitly include the newlib header that provides those macros.
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zephyr_include_directories(include)
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# LIBC_*_DIR may or may not have been set by the toolchain. E.g. when
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# using ZEPHYR_TOOLCHAIN_VARIANT=cross-compile it will be either up to the
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# toolchain to know where it's libc implementation is, or if it is
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# unable to, it will be up to the user to specify LIBC_*_DIR vars to
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# point to a newlib implementation. Note that this does not change the
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# directory order if LIBC_INCLUDE_DIR is already a system header
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# directory.
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if(LIBC_INCLUDE_DIR)
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zephyr_include_directories(${LIBC_INCLUDE_DIR})
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endif()
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if(LIBC_LIBRARY_DIR)
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set(LIBC_LIBRARY_DIR_FLAG -L${LIBC_LIBRARY_DIR})
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endif()
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# define __LINUX_ERRNO_EXTENSIONS__ so we get errno defines like -ESHUTDOWN
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# used by the network stack
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zephyr_compile_definitions(__LINUX_ERRNO_EXTENSIONS__)
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zephyr_link_libraries(
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m
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c
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${LIBC_LIBRARY_DIR_FLAG} # NB: Optional
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$<$<BOOL:${CONFIG_NEWLIB_LIBC_FLOAT_PRINTF}>:-u_printf_float>
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$<$<BOOL:${CONFIG_NEWLIB_LIBC_FLOAT_SCANF}>:-u_scanf_float>
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gcc # Lib C depends on libgcc. e.g. libc.a(lib_a-fvwrite.o) references __aeabi_idiv
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)
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if(CONFIG_NEWLIB_LIBC_NANO)
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zephyr_link_libraries(
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-specs=nano.specs
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)
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zephyr_compile_options(
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-specs=nano.specs
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)
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endif()
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