/usr/share/fpcsrc/2.6.2/compiler/arm/ is in fpc-source-2.6.2 2.6.2-8.
This file is owned by root:root, with mode 0o755.
..
/usr/share/fpcsrc/2.6.2/compiler/arm/aasmcpu.pas
/usr/share/fpcsrc/2.6.2/compiler/arm/agarmgas.pas
/usr/share/fpcsrc/2.6.2/compiler/arm/aoptcpu.pas
/usr/share/fpcsrc/2.6.2/compiler/arm/aoptcpub.pas
/usr/share/fpcsrc/2.6.2/compiler/arm/aoptcpuc.pas
/usr/share/fpcsrc/2.6.2/compiler/arm/aoptcpud.pas
/usr/share/fpcsrc/2.6.2/compiler/arm/armatt.inc
/usr/share/fpcsrc/2.6.2/compiler/arm/armatts.inc
/usr/share/fpcsrc/2.6.2/compiler/arm/armnop.inc
/usr/share/fpcsrc/2.6.2/compiler/arm/armop.inc
/usr/share/fpcsrc/2.6.2/compiler/arm/armtab.inc
/usr/share/fpcsrc/2.6.2/compiler/arm/cgcpu.pas
/usr/share/fpcsrc/2.6.2/compiler/arm/cpubase.pas
/usr/share/fpcsrc/2.6.2/compiler/arm/cpuinfo.pas
/usr/share/fpcsrc/2.6.2/compiler/arm/cpunode.pas
/usr/share/fpcsrc/2.6.2/compiler/arm/cpupara.pas
/usr/share/fpcsrc/2.6.2/compiler/arm/cpupi.pas
/usr/share/fpcsrc/2.6.2/compiler/arm/cputarg.pas
/usr/share/fpcsrc/2.6.2/compiler/arm/itcpugas.pas
/usr/share/fpcsrc/2.6.2/compiler/arm/narmadd.pas
/usr/share/fpcsrc/2.6.2/compiler/arm/narmcal.pas
/usr/share/fpcsrc/2.6.2/compiler/arm/narmcnv.pas
/usr/share/fpcsrc/2.6.2/compiler/arm/narmcon.pas
/usr/share/fpcsrc/2.6.2/compiler/arm/narminl.pas
/usr/share/fpcsrc/2.6.2/compiler/arm/narmmat.pas
/usr/share/fpcsrc/2.6.2/compiler/arm/narmset.pas
/usr/share/fpcsrc/2.6.2/compiler/arm/raarm.pas
/usr/share/fpcsrc/2.6.2/compiler/arm/raarmgas.pas
/usr/share/fpcsrc/2.6.2/compiler/arm/rarmcon.inc
/usr/share/fpcsrc/2.6.2/compiler/arm/rarmdwa.inc
/usr/share/fpcsrc/2.6.2/compiler/arm/rarmnor.inc
/usr/share/fpcsrc/2.6.2/compiler/arm/rarmnum.inc
/usr/share/fpcsrc/2.6.2/compiler/arm/rarmrni.inc
/usr/share/fpcsrc/2.6.2/compiler/arm/rarmsri.inc
/usr/share/fpcsrc/2.6.2/compiler/arm/rarmsta.inc
/usr/share/fpcsrc/2.6.2/compiler/arm/rarmstd.inc
/usr/share/fpcsrc/2.6.2/compiler/arm/rarmsup.inc
/usr/share/fpcsrc/2.6.2/compiler/arm/rgcpu.pas