Linking errors with Arduino IoT Cloud

[maxgerhardt]

Consider the platformio.ini

[env:portenta_c33]
platform = renesas-ra
board = portenta_c33
framework = arduino
lib_ldf_mode = deep+
lib_deps =
	arduino-libraries/ArduinoIoTCloud@^1.13.0

with src/* files from https://github.com/arduino-libraries/ArduinoIoTCloud/tree/1.13.0/examples/ArduinoIoTCloud-Basic.

Compilation will go through, but linking will fail, complaining about double-defined symbols with libnosys.a and the "Storage" library, which also wants to implement _write, _read, et cetera.

.pio/build/portenta_c33/libbf8/libStorage.a(storage_retarget.cpp.o): In function `_close':
storage_retarget.cpp:(.text._close+0x0): multiple definition of `_close'
/home/zak/.platformio/packages/toolchain-gccarmnoneeabi@1.70201.0/bin/../lib/gcc/arm-none-eabi/7.2.1/../../../../arm-none-eabi/lib/thumb/v8-m.main/fpv5-sp/hard/libnosys.a(close.o):close.c:(.text._close+0x0): first defined here
.pio/build/portenta_c33/libbf8/libStorage.a(storage_retarget.cpp.o): In function `_write':
storage_retarget.cpp:(.text._write+0x0): multiple definition of `_write'
/home/zak/.platformio/packages/toolchain-gccarmnoneeabi@1.70201.0/bin/../lib/gcc/arm-none-eabi/7.2.1/../../../../arm-none-eabi/lib/thumb/v8-m.main/fpv5-sp/hard/libnosys.a(write.o):write.c:(.text._write+0x0): first defined here
.pio/build/portenta_c33/libbf8/libStorage.a(storage_retarget.cpp.o): In function `_read':
storage_retarget.cpp:(.text._read+0x0): multiple definition of `_read'
/home/zak/.platformio/packages/toolchain-gccarmnoneeabi@1.70201.0/bin/../lib/gcc/arm-none-eabi/7.2.1/../../../../arm-none-eabi/lib/thumb/v8-m.main/fpv5-sp/hard/libnosys.a(read.o):read.c:(.text._read+0x0): first defined here
.pio/build/portenta_c33/libbf8/libStorage.a(storage_retarget.cpp.o): In function `_lseek':
storage_retarget.cpp:(.text._lseek+0x0): multiple definition of `_lseek'
/home/zak/.platformio/packages/toolchain-gccarmnoneeabi@1.70201.0/bin/../lib/gcc/arm-none-eabi/7.2.1/../../../../arm-none-eabi/lib/thumb/v8-m.main/fpv5-sp/hard/libnosys.a(lseek.o):lseek.c:(.text._lseek+0x0): first defined here

While it does compile just fine in the Arduino IDE.

I've recorded the Arduino IDE linker commands here. Noticable differences:

• no --specs=nano.specs in Arduino IDE`, but PIO has it
• missing -nostdlib in PIO during C/C++ files compilation but present during linking
• missing -Wl,--whole-archive -Wl,--start-group [..] -Wl,--no-whole-archive -Wl,--end-group missing in PIO

Trying to patch that in, especially with

env.Prepend(_LIBFLAGS="-Wl,--whole-archive  -Wl,--start-group ")
env.Append(_LIBFLAGS=" -Wl,--no-whole-archive -lfsp -lstdc++ -lsupc++ -lm -lc -lgcc -lnosys -Wl,--end-group ")

in the arduino.py scirpt results.. in diferent kind of linking errors, in lwip.

Linking .pio\build\portenta_c33\firmware.elf
C:\Users\Max\.platformio\packages\framework-arduinorenesas-portenta\libraries\lwIpWrapper\src\cortex-m33\liblwIP.a(fsdata.o):(.rodata.file__index_html+0x0): multiple definition of `file__index_html'
C:\Users\Max\.platformio\packages\framework-arduinorenesas-portenta\libraries\lwIpWrapper\src\cortex-m33\liblwIP.a(fs.o):(.rodata.file__index_html+0x0): first defined here
C:\Users\Max\.platformio\packages\framework-arduinorenesas-portenta\libraries\lwIpWrapper\src\cortex-m33\liblwIP.a(fsdata.o):(.rodata.file__404_html+0x0): multiple definition of `file__404_html'
C:\Users\Max\.platformio\packages\framework-arduinorenesas-portenta\libraries\lwIpWrapper\src\cortex-m33\liblwIP.a(fs.o):(.rodata.file__404_html+0x0): first defined here
C:\Users\Max\.platformio\packages\framework-arduinorenesas-portenta\libraries\lwIpWrapper\src\cortex-m33\liblwIP.a(fsdata.o):(.rodata.file__img_sics_gif+0x0): multiple definition 
of `file__img_sics_gif'
C:\Users\Max\.platformio\packages\framework-arduinorenesas-portenta\libraries\lwIpWrapper\src\cortex-m33\liblwIP.a(fs.o):(.rodata.file__img_sics_gif+0x0): first defined here      
c:/users/max/.platformio/packages/toolchain-gccarmnoneeabi@1.70201.0/bin/../lib/gcc/arm-none-eabi/7.2.1/../../../../arm-none-eabi/lib/thumb/v8-m.main/fpv5-sp/hard\libc.a(lib_a-fini.o): In function `__libc_fini_array':
fini.c:(.text.__libc_fini_array+0x26): undefined reference to `_fini'
collect2.exe: error: ld returned 1 exit status

whatever the case may be, something is causing this to not build correctly in PIO while it does work in the Arduino IDE.

[valeros]

Thanks for reporting, should be fixed in the dev branch.