[MacPorts] #57572: arm-none-eabi-gcc: add support for --specs=<something>.specs

[MacPorts]

#57572: arm-none-eabi-gcc: add support for --specs=<something>.specs
--------------------+-------------------------------
 Reporter:  mojca   |      Owner:  (none)
     Type:  defect  |     Status:  new
 Priority:  Normal  |  Milestone:
Component:  ports   |    Version:
 Keywords:          |       Port:  arm-none-eabi-gcc
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 While following a tutorial for embeded systems development I got stuck at
 {{{
 $ arm-none-eabi-gcc --specs=nosys.specs -mcpu=cortex-m4 -mthumb -std=c99
 -Wall -march=armv7e-m helloworld.c
 arm-none-eabi-gcc: error: nosys.specs: No such file or directory
 }}}

 I found plenty of similar reports which all seem to suggest that some
 files are missing in the installation, the first random hit:
 * https://github.com/micropython/micropython/issues/1238

 And many of them point to a site like
 * https://developer.arm.com/open-source/gnu-toolchain/gnu-rm/downloads
 as the ultimate source for getting the correct files.

 What precisely do we need to add to the existing `arm-none-eabi-gcc`
 compiler to make this work correctly?

-- 
Ticket URL: <https://trac.macports.org/ticket/57572>
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