esp-idf/components/newlib/CMakeLists.txt
Ivan Grokhotkov cc1d287133 newlib: use --specs=nano.specs to enable "nano" version of C library
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.
2020-03-27 20:04:47 +07:00

43 lines
1.3 KiB
CMake

set(srcs
"abort.c"
"heap.c"
"locks.c"
"poll.c"
"pthread.c"
"random.c"
"reent_init.c"
"syscall_table.c"
"syscalls.c"
"termios.c"
"time.c")
set(include_dirs platform_include)
if(CONFIG_SPIRAM_CACHE_WORKAROUND)
set(ldfragments esp32-spiram-rom-functions-c.lf)
endif()
list(APPEND ldfragments newlib.lf)
idf_component_register(SRCS "${srcs}"
INCLUDE_DIRS "${include_dirs}"
PRIV_REQUIRES soc esp_timer
LDFRAGMENTS "${ldfragments}")
# Toolchain libraries require code defined in this component
idf_component_get_property(newlib newlib COMPONENT_LIB)
target_link_libraries(${COMPONENT_LIB} INTERFACE c m gcc "$<TARGET_FILE:${newlib}>")
set_source_files_properties(heap.c PROPERTIES COMPILE_FLAGS -fno-builtin)
# Forces the linker to include locks, heap, and syscalls from this component,
# instead of the implementations provided by newlib.
set(EXTRA_LINK_FLAGS "-u newlib_include_locks_impl")
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()