New project wizard Classic C++ for STM32F0xx and GCC 14 does not compile

[jonahgraham]

Screenshots with steps to reproduce. Tested with (what will be) 2026-03 RC1

1. Create new C++ project

2. Create STM32F0xx with defaults

3. On toolchain page choose xpack version 14.xxxx:

4. Build project and get this error:

make all 
Building file: ../system/src/newlib/cxx.cpp
Invoking: GNU Arm Cross C++ Compiler
arm-none-eabi-g++ -mcpu=cortex-m0 -mthumb -Og -fmessage-length=0 -fsigned-char -ffunction-sections -fdata-sections -ffreestanding -fno-move-loop-invariants -Wall -Wextra -g3 -DDEBUG -DUSE_FULL_ASSERT -DTRACE -DOS_USE_TRACE_SEMIHOSTING_DEBUG -DSTM32F051x8 -DUSE_HAL_DRIVER -DHSE_VALUE=8000000 -I"../include" -I"../system/include" -I"../system/include/cmsis" -I"../system/include/stm32f0-hal" -std=gnu++11 -fabi-version=0 -fno-exceptions -fno-rtti -fno-use-cxa-atexit -fno-threadsafe-statics -MMD -MP -MF"system/src/newlib/cxx.d" -MT"system/src/newlib/cxx.o" -c -o "system/src/newlib/cxx.o" "../system/src/newlib/cxx.cpp"
../system/src/newlib/cxx.cpp: In function 'void __gnu_cxx::__verbose_terminate_handler()':
../system/src/newlib/cxx.cpp:51:5: error: 'abort' was not declared in this scope; did you mean 'std::abort'?
   51 |     abort();
      |     ^~~~~
      |     std::abort
In file included from ../system/src/newlib/cxx.cpp:35:
/home/jonah/.local/xPacks/@xpack-dev-tools/arm-none-eabi-gcc/14.2.1-1.1.1/.content/arm-none-eabi/include/c++/14.2.1/cstdlib:58:19: note: 'std::abort' declared here
   58 |   extern "C" void abort(void) _GLIBCXX_NOTHROW _GLIBCXX_NORETURN;
      |                   ^~~~~
../system/src/newlib/cxx.cpp: In function 'void __cxa_pure_virtual()':
../system/src/newlib/cxx.cpp:67:5: error: 'abort' was not declared in this scope; did you mean 'std::abort'?
   67 |     abort();
      |     ^~~~~
      |     std::abort
/home/jonah/.local/xPacks/@xpack-dev-tools/arm-none-eabi-gcc/14.2.1-1.1.1/.content/arm-none-eabi/include/c++/14.2.1/cstdlib:58:19: note: 'std::abort' declared here
   58 |   extern "C" void abort(void) _GLIBCXX_NOTHROW _GLIBCXX_NORETURN;
      |                   ^~~~~
../system/src/newlib/cxx.cpp: In function 'void __gnu_cxx::__verbose_terminate_handler()':
../system/src/newlib/cxx.cpp:52:3: warning: 'noreturn' function does return
   52 |   }
      |   ^
../system/src/newlib/cxx.cpp: In function 'void __cxa_pure_virtual()':
../system/src/newlib/cxx.cpp:68:3: warning: 'noreturn' function does return
   68 |   }
      |   ^
make: *** [system/src/newlib/subdir.mk:46: system/src/newlib/cxx.o] Error 1
"make all" terminated with exit code 2. Build might be incomplete.

11:32:20 Build Failed. 3 errors, 2 warnings. (took 138ms)

Using an older toolchain fixes the problem (such as 8.3.1-1.4.1). Also applying gcc's suggested change also fixes the problem.

[ilg-ul]

Thank you for testing and reporting. The STMxx templates are indeed long outdated.

For 2026-03 it is a bit too late, I'll try to fix them for the next release.