ARM Cortex-M Microcontroller startup files

[Mike via Digitalmars-d]

On Monday, 27 April 2015 at 05:22:55 UTC, Timo Sintonen wrote:
> On Monday, 27 April 2015 at 05:19:52 UTC, Timo Sintonen wrote:
>
> Oops, I forget to uncomment the m4 options. The correct version 
> is
>>
>> And I replace the whole gcc/config/arm/t-arm-elf with this:
>> MULTILIB_OPTIONS  += 
>> mcpu=cortex-m0/mcpu=cortex-m3/mcpu=cortex-m4
>> mfloat-abi=hard mfpu=fpv4-sp-d16
>> MULTILIB_DIRNAMES += cortex-m0 cortex-m3 cortex-m4
>> MULTILIB_REQUIRED += mcpu=cortex-m0
>> MULTILIB_REQUIRED += mcpu=cortex-m3
>> MULTILIB_REQUIRED += mcpu=cortex-m4 /mfloat-abi=hard  
>> /mfpu=fpv4-sp-d16
>> MULTILIB_EXTRA_OPTS += mthumb

The toolchain at https://launchpad.net/gcc-arm-embedded doesn't 
require this modification, so I'm wondering if there's another 
way.  My understanding is that this is unlreated to GDC itself, 
so we should be able to follow essentially the same procedure as 
the embedded C/C++ toolchains, right?

They have their build scripts included in their source package, 
so I spent a little time analyzing their build scripts today, and 
I see they are using the following config option:

"--with-multilib-list=armv6-m,armv7-m,armv7e-m,cortex-m7,armv7-r"

I'm wondering if that alone will do it.  I guess I'll give it a 
try later and let you all know what I find.

Mike