C++ link error undefined reference to `__cxa_end_cleanup

[wolf]

ChibiStudio_Preview14.7z

Hello,

I'm encountering a problem when using chprintf in a C++ project, i.e. modifying the RT-STM32F407-DISCOVERY-G++ example by including the appropriate src & inc and inserting in the main loop the following immediate after the sleep:

chprintf((BaseSequentialStream*)&SD2, "Hello");

The linker gives the following errors:

Linking build/ch.elf
build/obj/main.o: In function `chprintf':
C:\ChibiStudio\workspace30\RT-STM32F407-DISCOVERY-G++-Shell/../../chibios3/os/hal/lib/streams/chprintf.h:77: undefined reference to `__cxa_end_cleanup'
build/obj/main.o:(.ARM.extab.text._ZL8chprintfP20BaseSequentialStreamPKcz+0x0): undefined reference to `__gxx_personality_v0'
collect2.exe: error: ld returned 1 exit status
make: *** [build/ch.elf] Error 1

A quick GOOGLE search hints to using g++ instead of gcc for linking.
But in the make file is a hint not to do so:

Code: Select all

# Enable loading with g++ only if you need C++ runtime support.
# NOTE: You can use C++ even without C++ support if you are careful. C++
#       runtime support makes code size explode.
LD   = $(TRGT)gcc
#LD   = $(TRGT)g++

BTW: using g++ instead of gcc leads to even more error messages:

Code: Select all

Linking build/ch.elf
c:/chibistudio/tools/gnu tools arm embedded/4.7 2014q2/bin/../lib/gcc/arm-none-eabi/4.7.4/../../../../arm-none-eabi/lib/armv7e-m\libg.a(lib_a-sbrkr.o): In function `_sbrk_r':
sbrkr.c:(.text._sbrk_r+0xc): undefined reference to `_sbrk'
c:/chibistudio/tools/gnu tools arm embedded/4.7 2014q2/bin/../lib/gcc/arm-none-eabi/4.7.4/../../../../arm-none-eabi/lib/armv7e-m\libg.a(lib_a-writer.o): In function `_write_r':
writer.c:(.text._write_r+0x10): undefined reference to `_write'
c:/chibistudio/tools/gnu tools arm embedded/4.7 2014q2/bin/../lib/gcc/arm-none-eabi/4.7.4/../../../../arm-none-eabi/lib/armv7e-m\libg.a(lib_a-closer.o): In function `_close_r':
closer.c:(.text._close_r+0xc): undefined reference to `_close'
c:/chibistudio/tools/gnu tools arm embedded/4.7 2014q2/bin/../lib/gcc/arm-none-eabi/4.7.4/../../../../arm-none-eabi/lib/armv7e-m\libg.a(lib_a-fstatr.o): In function `_fstat_r':
fstatr.c:(.text._fstat_r+0xe): undefined reference to `_fstat'
c:/chibistudio/tools/gnu tools arm embedded/4.7 2014q2/bin/../lib/gcc/arm-none-eabi/4.7.4/../../../../arm-none-eabi/lib/armv7e-m\libg.a(lib_a-isattyr.o): In function `_isatty_r':
isattyr.c:(.text._isatty_r+0xc): undefined reference to `_isatty'
c:/chibistudio/tools/gnu tools arm embedded/4.7 2014q2/bin/../lib/gcc/arm-none-eabi/4.7.4/../../../../arm-none-eabi/lib/armv7e-m\libg.a(lib_a-lseekr.o): In function `_lseek_r':
lseekr.c:(.text._lseek_r+0x10): undefined reference to `_lseek'
c:/chibistudio/tools/gnu tools arm embedded/4.7 2014q2/bin/../lib/gcc/arm-none-eabi/4.7.4/../../../../arm-none-eabi/lib/armv7e-m\libg.a(lib_a-readr.o): In function `_read_r':
readr.c:(.text._read_r+0x10): undefined reference to `_read'
collect2.exe: error: ld returned 1 exit status
make: *** [build/ch.elf] Error 1

These errors look like syscalls related!?


Any idea for a workaraound, keeping gcc for linking?

Best regards
~wolf

[Giovanni]

Hi,

Correct, you must provide a syscalls module. The C++ scenario is only tested with exceptions disabled.

Giovanni

[wolf]

Hi all,

OK - it seems to work if i compile with b.m. settings and also include syscalls.c in the project.

And yes - the code is getting a lot bigger!

Many thanks for the info,

best regards

~wolf

Code: Select all

# Enable loading with g++ only if you need C++ runtime support.
# NOTE: You can use C++ even without C++ support if you are careful. C++
#       runtime support makes code size explode.
#LD   = $(TRGT)gcc
LD   = $(TRGT)g++