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newlib: use --specs=nano.specs to enable "nano" version of C library

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esp2020r1 toolchain includes a nano.specs file, which instructs GCC to
substitute libc.a with libc_nano.a.

In the build system, this simplifies handling of the nano formatting
option, eliminating LIBC and LIBM global variables.
This commit is contained in:
Ivan Grokhotkov 2020-01-02 15:52:13 +01:00 committed by Anton Maklakov
parent 419848549e
commit cc1d287133
3 changed files with 6 additions and 9 deletions
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2
components/app_trace/CMakeLists.txt
View file

@ -39,4 +39,4 @@ target_compile_options(${COMPONENT_LIB} PRIVATE "-fno-profile-arcs" "-fno-test-c
# Force app_trace to also appear later than gcov in link line
idf_component_get_property(app_trace app_trace COMPONENT_LIB)
target_link_libraries(${COMPONENT_LIB} INTERFACE $<TARGET_FILE:${app_trace}> gcov $<TARGET_FILE:${app_trace}> ${LIBC})
target_link_libraries(${COMPONENT_LIB} INTERFACE $<TARGET_FILE:${app_trace}> gcov $<TARGET_FILE:${app_trace}> c)

6
components/newlib/CMakeLists.txt
View file

@ -25,7 +25,7 @@ idf_component_register(SRCS "${srcs}"
# Toolchain libraries require code defined in this component
idf_component_get_property(newlib newlib COMPONENT_LIB)
target_link_libraries(${COMPONENT_LIB} INTERFACE ${LIBC} ${LIBM} gcc "$<TARGET_FILE:${newlib}>")
target_link_libraries(${COMPONENT_LIB} INTERFACE c m gcc "$<TARGET_FILE:${newlib}>")
set_source_files_properties(heap.c PROPERTIES COMPILE_FLAGS -fno-builtin)
@ -36,3 +36,7 @@ list(APPEND EXTRA_LINK_FLAGS "-u newlib_include_heap_impl")
list(APPEND EXTRA_LINK_FLAGS "-u newlib_include_syscalls_impl")
list(APPEND EXTRA_LINK_FLAGS "-u newlib_include_pthread_impl")
target_link_libraries(${COMPONENT_LIB} INTERFACE "${EXTRA_LINK_FLAGS}")
if(CONFIG_NEWLIB_NANO_FORMAT)
target_link_libraries(${COMPONENT_LIB} INTERFACE "--specs=nano.specs")
endif()

7
components/newlib/project_include.cmake
View file

@ -1,7 +0,0 @@
if(CONFIG_NEWLIB_NANO_FORMAT)
set(LIBC c_nano)
else()
set(LIBC c)
endif()
set(LIBM m)