What is the state of Microcontroller support in d?

[Dan Walmsley via Digitalmars-d]

On Tuesday, 20 June 2017 at 11:58:21 UTC, Dan Walmsley wrote:
> On Tuesday, 20 June 2017 at 11:53:07 UTC, Mike wrote:
>> On Tuesday, 20 June 2017 at 11:50:56 UTC, Dan Walmsley wrote:
>>
>>> C:\dev\repos\STM32DBlinky\Blinky\build\obj\main.o: In 
>>> function `_D4main5Point3SumMFZi':
>>> C:\dev\repos\STM32DBlinky\Blinky/main.d:26: undefined 
>>> reference to `_D9invariant12_d_invariantFC6ObjectZv'
>>> C:\dev\repos\STM32DBlinky\Blinky/main.d:26: undefined 
>>> reference to `_d_assert_msg'
>>> C:\dev\repos\STM32DBlinky\Blinky\build\obj\main.o: In 
>>> function `_D4main4MainFZv':
>>> C:\dev\repos\STM32DBlinky\Blinky/main.d:44: undefined 
>>> reference to `_d_eh_resume_unwind'
>>>
>>> Whats the invariant object thing?
>>
>> Please publish your source code and your linker script.
>
> https://github.com/vitalElement/STM32DBlinky

commands to build were:
Compile:
ldc2  -c -O0 -march=thumb -mcpu=cortex-m4 
-mtriple=thumb-none-linux-eabi  -g  -debuglib= -conf= -oftest 
-betterC -release  main.d -ofmain.o
ldc2  -c -O0 -march=thumb -mcpu=cortex-m4 
-mtriple=thumb-none-linux-eabi  -g  -debuglib= -conf= -oftest 
-betterC -release stm32f4xx_startup.d -ofstm32f4xx_startup.o

Link:
arm-none-eabi-gcc -mcpu=cortex-m4 -Wl,-Map,output.map -nostdlib  
-mfpu=fpv4-sp-d16 -mfloat-abi=hard -nostartfiles 
-Wl,--gc-sections  -O0 -Wl,-T"link.ld"  -oBlinky.elf attribute.o 
object.o main.o stm32f4xx_startup.o   -Wl,--start-group   
-Wl,--end-group

If you need windows binaries for arm-none-eabi I can give you 
some.