[MrQuincle]

How's that implemented? I'm just used to embedded. Implementing sbrk etc.

Some flags i use to disable exceptions

  # The default flags will be used in all build types
  # The C/C++ shared flags are in DEFAULT_C_AND_CXX_FLAGS, the ones particular for C or C++ in DEFAULT_X_FLAGS
  # The flags mean the following:
  #   * no-exceptions          disable exceptions support and use C++ libs without exceptions
  #   * delete-dead-exceptions throw away instructions which only purpose is to throw exceptions
  #   * no-unwind-tables       stack-walking code for backtrace generation (TODO: we might want to enable this in Debug!)
  #   * no-non-call-exceptions do not convert trapping instructions (SIGSEGV, etc) into exceptions 
  #   * thumb                  use Thumb mode (optimized instruction set)
  #   * function-sections      put every function in its own segment, now it can be garbage collected
  #   * data-sections          put every variable in its own segment
  #   * no-strict-aliasing     allow *int = *float aberrations
  #   * no-builtin             do not use abs, strcpy, and other built-in functions
  #   * short-enums            use a single byte for an enum if possible
  SET(DEFAULT_CXX_FLAGS       "-std=c++17 -fno-exceptions -fdelete-dead-exceptions -fno-unwind-tables -fno-non-call-exceptions")

[fweimer]

-fno-exceptions should be sufficient for this, especially if you link statically. People also use `-fno-rtti` to save the extra data by dynamic_cast etc.