Hello,
I'm trying to snprintf into a data buffer, but the application dies precisely on this call. I'm not using nanolib because I want exceptions. My CMake file looks like this: Notice that I added the -u printf_float to the linker flags. Is this not all that is needed?
Thanks for any help!
set(CMAKE_SYSTEM_NAME Generic)
set(CMAKE_SYSTEM_PROCESSOR arm)
set(CMAKE_C_COMPILER_FORCED TRUE)
set(CMAKE_CXX_COMPILER_FORCED TRUE)
set(CMAKE_C_COMPILER_ID GNU)
set(CMAKE_CXX_COMPILER_ID GNU)
# set standard c++ version
set(CMAKE_CXX_STANDARD 17)
# Some default GCC settings
# arm-none-eabi- must be part of path environment
# set(TOOLCHAIN_PREFIX arm-none-eabi-)
set(CMAKE_C_COMPILER ${TOOLCHAIN_PREFIX}gcc)
set(CMAKE_ASM_COMPILER ${CMAKE_C_COMPILER})
set(CMAKE_CXX_COMPILER ${TOOLCHAIN_PREFIX}g++)
set(CMAKE_LINKER ${TOOLCHAIN_PREFIX}g++)
set(CMAKE_OBJCOPY ${TOOLCHAIN_PREFIX}objcopy)
set(CMAKE_SIZE ${TOOLCHAIN_PREFIX}size)
set(CMAKE_EXECUTABLE_SUFFIX_ASM ".elf")
set(CMAKE_EXECUTABLE_SUFFIX_C ".elf")
set(CMAKE_EXECUTABLE_SUFFIX_CXX ".elf")
set(CMAKE_TRY_COMPILE_TARGET_TYPE STATIC_LIBRARY)
# MCU specific flags
set(TARGET_FLAGS "-mcpu=cortex-m4 -mfpu=fpv4-sp-d16 -mfloat-abi=hard ")
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${TARGET_FLAGS}")
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall -Wextra -Wpedantic -fdata-sections -ffunction-sections -fexceptions")
if(CMAKE_BUILD_TYPE MATCHES Debug)
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -O0 -g3")
endif()
if(CMAKE_BUILD_TYPE MATCHES Release)
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Os -g0")
endif()
set(CMAKE_ASM_FLAGS "${CMAKE_C_FLAGS} -x assembler-with-cpp -MMD -MP")
set(CMAKE_CXX_FLAGS "${CMAKE_C_FLAGS} -fno-rtti -fno-threadsafe-statics -fexceptions -funwind-tables")
# add_compile_options(-fexceptions)
# add_compile_options(-funwind-tables)
# set(CMAKE_CXX_FLAGS "${CMAKE_C_FLAGS} -fno-rtti -fno-exceptions -fno-threadsafe-statics")
set(CMAKE_C_LINK_FLAGS "${TARGET_FLAGS}")
set(CMAKE_C_LINK_FLAGS "${CMAKE_C_LINK_FLAGS} -T \"${CMAKE_SOURCE_DIR}/stm32g474retx_flash.ld\"")
# set(CMAKE_C_LINK_FLAGS "${CMAKE_C_LINK_FLAGS} --specs=nano.specs")
set(CMAKE_C_LINK_FLAGS "${CMAKE_C_LINK_FLAGS} -Wl,-Map=${CMAKE_PROJECT_NAME}.map -Wl,--gc-sections")
set(CMAKE_C_LINK_FLAGS "${CMAKE_C_LINK_FLAGS} -Wl,--start-group -lc -lm -Wl,--end-group")
set(CMAKE_C_LINK_FLAGS "${CMAKE_C_LINK_FLAGS} -Wl,--print-memory-usage")
set(CMAKE_C_LINK_FLAGS "${CMAKE_C_LINK_FLAGS} -u _printf_float")
set(CMAKE_CXX_LINK_FLAGS "${CMAKE_C_LINK_FLAGS} -Wl,--start-group -lstdc++ -lsupc++ -Wl,--end-group")
