ARM Cortex-M Microcontroller startup files

[Iain Buclaw via Digitalmars-d]

On 27 April 2015 at 07:22, Timo Sintonen via Digitalmars-d
<digitalmars-d at puremagic.com> 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
>>
>>
>

Maybe you could instead create a new file under config/arm/t-mprofile,
for use with --with-multilib-list=mprofile  (see patch below).

See config/arm/t-aprofile for guidance, which looks to be tailored
multilib support for the Cortex-A range of CPUs.

I can ask around if someone has done something similar for Cortex-M.

Regards
Iain.

--- a/gcc/config.gcc
+++ b/gcc/config.gcc
@@ -3711,6 +3711,28 @@ case "${target}" in
                                        tmake_file="${tmake_file}
arm/t-aprofile"
                                        break
                                        ;;
+                               mprofile)
+                               # Note that arm/t-mprofile is a
+                               # stand-alone make file fragment to be
+                               # used only with itself.  We do not
+                               # specifically use the
+                               # TM_MULTILIB_OPTION framework because
+                               # this shorthand is more
+                               # pragmatic. Additionally it is only
+                               # designed to work without any
+                               # with-cpu, with-arch with-mode
+                               # with-fpu or with-float options.
+                                       if test "x$with_arch" != x \
+                                           || test "x$with_cpu" != x \
+                                           || test "x$with_float" != x \
+                                           || test "x$with_fpu" != x \
+                                           || test "x$with_mode" != x ; then
+                                           echo "Error: You cannot
use any of --with-arch/cpu/fpu/float/mode with
--with-multilib-list=mprofile" 1>&2
+                                           exit 1
+                                       fi
+                                       tmake_file="${tmake_file}
arm/t-mprofile"
+                                       break
+                                       ;;
                                default)
                                        ;;
                                *)