[Lazarus] Error when building Lazarus 1.6.2 from sources on RPi3

[Bo Berglund]

I am trying to build an FPC 3.0.0 + Lazarus 1.6.2 environment on a new
Rpi3 with the latest Raspbian PIXEL.
I have come so far as to having compiled fpc 3.0.0 successfully and
run its make install command to put the binaries in the expected
places (all under /home/pi):

Now when I try to build Lazarus 1.6.2 from SVN sources I get this:

pi at rpi3-jessiepixel:~/dev/lazarus/1.6.2 $ time make bigide
OPT=-dFPC_ARMHF  FPC=/home/pi/bin/ppcarm
make -C packager/registration
make[1]: Entering directory
'/home/pi/dev/lazarus/1.6.2/packager/registration'
/bin/rm -f ../units/arm-linux/fcllaz.ppu
/home/pi/bin/ppcarm -MObjFPC -Scghi -O1 -g -gl -l -vewnhibq -Fu. -FE.
-FU../units/arm-linux -dFPC_ARMHF -darm fcllaz.pas
Free Pascal Compiler version 3.0.0 [2017/01/09] for arm
Copyright (c) 1993-2015 by Florian Klaempfl and others
(1002) Target OS: Linux for ARMHF
(3104) Compiling fcllaz.pas
Fatal: (10022) Can't find unit system used by fcllaz
Fatal: (1018) Compilation aborted
Makefile:2702: recipe for target 'fcllaz.ppu' failed
make[1]: *** [fcllaz.ppu] Error 1
make[1]: Leaving directory
'/home/pi/dev/lazarus/1.6.2/packager/registration'
Makefile:3050: recipe for target 'registration' failed
make: *** [registration] Error 2

real    0m0.171s

Why does it not find "unit system"?

I have searched for all files with a name system.* from ~/ and all
that are found (rather many) are located inside the fpc source tree.

What could have happened here? Is there some extra option to add to
the make command to tell it where the fpc sources are located?


-- 
Bo Berglund
Developer in Sweden