[fpc-pascal] fpcup fails on Linux

[Juha Manninen]

I tried installing FPC using fpcup on some Linux systems, now on XUbuntu.
Both "fixes" and "trunk" give an error with fpjson. On Windows I can
install both without problems. Do I need another package from Ubuntu
repos?

Here "fixes" is set to branch fixes_3_0 :

./fpcup_linux_x86 --fpcURL="fixes"
--only="FPCcleanonly,FPCgetonly,FPCbuildonly" --verbose

...
The installer encountered the following error:
External command "/home/juha/development/fpc/compiler/ppc386 -Tlinux
-FEbin/i386-linux -FUunits/i386-linux/
-Fu/home/juha/development/fpc/rtl/units/i386-linux/
-Fu/home/juha/development/fpc/units/i386-linux/fcl-base
-Fu/home/juha/development/fpc/units/i386-linux/paszlib
-Fu/home/juha/development/fpc/units/i386-linux/hash
-Fu/home/juha/development/fpc/units/i386-linux/rtl-extra -Ur -Xs -O2
-n -Fu/home/juha/development/fpc/rtl/units/i386-linux
-Fu/home/juha/development/fpc/packages/paszlib/units/i386-linux
-Fu/home/juha/development/fpc/packages/fcl-process/units/i386-linux
-Fu/home/juha/development/fpc/packages/hash/units/i386-linux
-Fu/home/juha/development/fpc/packages/libtar/units/i386-linux
-Fu/home/juha/development/fpc/packages/fpmkunit/units/i386-linux
-Fu/home/juha/development/fpc/packages/fcl-json/units/i386-linux
-di386 -dRELEASE -viq rstconv.pp" failed with exit code 256. Console
output:
Target OS: Linux for i386
Compiling rstconv.pp
Fatal: Can't find unit variants used by fpjson
Fatal: Compilation aborted