[paparazzi-commits] [paparazzi/paparazzi] f3ca76: [build] split subdirs rules (#2674)

[Gautier Hattenberger]

  Branch: refs/heads/master
  Home:   https://github.com/paparazzi/paparazzi
  Commit: f3ca76a7502858f16913209242fb58608af5cead
      
https://github.com/paparazzi/paparazzi/commit/f3ca76a7502858f16913209242fb58608af5cead
  Author: Gautier Hattenberger <gautier.hattenberger@enac.fr>
  Date:   2021-03-23 (Tue, 23 Mar 2021)

  Changed paths:
    M Makefile
    M conf/Makefile.arm-embedded-toolchain
    M conf/Makefile.lpc21

  Log Message:
  -----------
  [build] split subdirs rules (#2674)

* [build] split subdirs rules

when compiling ground_segment target, it should not depend on misc tools
that are themselves compiling the ext libraries, including libopencm3.
this way, the command 'make ground_segment' should be enough to run a
simulation without installing a cross compiler

* [build] warning if arm-none gcc not found

and remove auto detect of old toolchain, not supported since 2013