hello,
I am trying to include a static library that contains the startup code
for ARM processor to my CMake project for cross compilation.
I included the linker script and added it to the executable. Flags and
include files are properly set in the CMake build output. The path to
the library is also correctly seen.
The linker fails on the startup code:
|Scanning dependencies of target testApp [ 50%] Building CXX object
CMakeFiles/testApp.dir/src/main.c.obj [100%] Linking CXX executable
testApp
/opt/gcc-arm-none-eabi-7-2017-q4-major/bin/../lib/gcc/arm-none-eabi/7.2.1/../../../../arm-none-eabi/lib/thumb/v7-ar/fpv3/hard/libc.a(lib_a-exit.o):
In function `exit': exit.c:(.text.exit+0x1c): undefined reference to
`_exit'
/opt/gcc-arm-none-eabi-7-2017-q4-major/bin/../lib/gcc/arm-none-eabi/7.2.1/../../../../arm-none-eabi/lib/thumb/v7-ar/fpv3/hard/libc.a(lib_a-fini.o):
In function `__libc_fini_array': fini.c:(.text.__libc_fini_array+0x2c):
undefined reference to `_fini'
/opt/gcc-arm-none-eabi-7-2017-q4-major/bin/../lib/gcc/arm-none-eabi/7.2.1/../../../../arm-none-eabi/lib/thumb/v7-ar/fpv3/hard/libc.a(lib_a-init.o):
In function `__libc_init_array': init.c:(.text.__libc_init_array+0x38):
undefined reference to `_init' collect2: error: ld returned 1 exit
status Here is my CMakeLists file: *cmake_minimum_required(VERSION
3.5.1)****project (hello-world)******set(SOURCE_FILES
src/main.c)******set (LINKER_SCRIPT
linker_script.ld)******add_executable(${TARGET_NAME}
${SOURCE_FILES})******set_target_properties( ${TARGET_NAME} PROPERTIES
LINK_DEPENDS ${LINKER_SCRIPT})******set(CMAKE_EXE_LINKER_FLAGS
"${CMAKE_EXE_LINKER_FLAGS} -Wl,-build-id=none -Wl,-T ${LINKER_SCRIPT} "
CACHE STRING "" FORCE )******set(COMMON_FLAGS "${COMMON_FLAGS}
-march=armv7-a")****set(COMMON_FLAGS "${COMMON_FLAGS}
-mfpu=vfpv3")****set(COMMON_FLAGS "${COMMON_FLAGS}
-mfloat-abi=hard")****set(COMMON_FLAGS "${COMMON_FLAGS}
-Wall")****set(COMMON_FLAGS "${COMMON_FLAGS} -O0")****set(COMMON_FLAGS
"${COMMON_FLAGS} -nostartfiles")****set(COMMON_FLAGS "${COMMON_FLAGS}
-fmessage-length=0")****set(COMMON_FLAGS "${COMMON_FLAGS}
-fno-exceptions")****set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS}
${COMMON_FLAGS}")****set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}
${COMMON_FLAGS}")******include_directories( inc
)******find_library(LIB_C NAMES libc PATHS "lib"
)******target_link_libraries(${TARGET_NAME} ${LIB_C})*** How can I solve
this problem? The only dependency here is the library itself... Thank
you in advance for any response. |
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