cmake: enable -mcall-prologues

[gudnimg]

An idea to save some flash memory.

[github-actions]

All values in bytes. Δ Delta to base

ΔFlash	ΔSRAM	Used Flash	Used SRAM	Free Flash	Free SRAM
-306	0	28064	1669	608	891

[gudnimg]

For reference, here is a copy of the ASM file at HEAD 49a82cd

firmware_asm_file.zip

[gudnimg]

Affected functions:

• void Motion::AbortPlannedMoves(Axis axis, bool halt)
• void TMC2130::WriteRegister(const MotorParams &params, Registers reg, uint32_t data)
• uint32_t TMC2130::ReadRegister(const MotorParams &params, Registers reg)
• void __attribute__((noinline)) MovableBase::SetCurrents(uint8_t iRun, uint8_t iHold)
• bool __attribute__((noinline)) TMC2130::Init(const MotorParams &params, const MotorCurrents &currents, MotorMode mode)
• uint8_t Protocol::EncodeResponseRead(const RequestMsg &msg, bool accepted, uint16_t value2, uint8_t *txbuff)
• void Application::ReportCommandAccepted(const mp::RequestMsg &rq, mp::ResponseMsgParamCodes status)
• bool Motion::InitAxis(config::Axis axis, MotorCurrents mc)
• void Motion::PlanMoveTo(Axis axis, pos_t pos, steps_t feed_rate, steps_t end_rate)
• void Idler::PlanHomingMoveBack()
• void Selector::PlanHomingMoveBack()
• void Selector::PrepareMoveToPlannedSlot()
• void Idler::PlanHomingMoveForward()
• void Idler::PrepareMoveToPlannedSlot()
• bool FilamentLoaded::set(uint8_t filament)
• bool FeedToFinda::Step()
• bool UnloadFilament::StepInner()
• bool ToolChange::StepInner()
• 0000470e <global constructors keyed to 65535_0_application.cpp.obj.10452>: (Some constructor?)
• int main()
• 0000622e <USB_Device_ProcessControlRequest>: (I guess this is the constructor of the class?)