/usr/share/fpcsrc/2.6.2/rtl/solaris/ 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/rtl/solaris/Makefile.fpc
/usr/share/fpcsrc/2.6.2/rtl/solaris/clocale.inc
/usr/share/fpcsrc/2.6.2/rtl/solaris/errno.inc
/usr/share/fpcsrc/2.6.2/rtl/solaris/errnostr.inc
/usr/share/fpcsrc/2.6.2/rtl/solaris/i386/
/usr/share/fpcsrc/2.6.2/rtl/solaris/i386/sighnd.inc
/usr/share/fpcsrc/2.6.2/rtl/solaris/i386/sighndh.inc
/usr/share/fpcsrc/2.6.2/rtl/solaris/i386/start.inc
/usr/share/fpcsrc/2.6.2/rtl/solaris/osdefs.inc
/usr/share/fpcsrc/2.6.2/rtl/solaris/osmacro.inc
/usr/share/fpcsrc/2.6.2/rtl/solaris/ostypes.inc
/usr/share/fpcsrc/2.6.2/rtl/solaris/pthread.inc
/usr/share/fpcsrc/2.6.2/rtl/solaris/ptypes.inc
/usr/share/fpcsrc/2.6.2/rtl/solaris/signal.inc
/usr/share/fpcsrc/2.6.2/rtl/solaris/sparc/
/usr/share/fpcsrc/2.6.2/rtl/solaris/sparc/sighnd.inc
/usr/share/fpcsrc/2.6.2/rtl/solaris/sparc/sighndh.inc
/usr/share/fpcsrc/2.6.2/rtl/solaris/sparc/start.inc
/usr/share/fpcsrc/2.6.2/rtl/solaris/suuid.inc
/usr/share/fpcsrc/2.6.2/rtl/solaris/sysos.inc
/usr/share/fpcsrc/2.6.2/rtl/solaris/sysosh.inc
/usr/share/fpcsrc/2.6.2/rtl/solaris/system.pp
/usr/share/fpcsrc/2.6.2/rtl/solaris/termio.pp
/usr/share/fpcsrc/2.6.2/rtl/solaris/termios.inc
/usr/share/fpcsrc/2.6.2/rtl/solaris/termiosproc.inc
/usr/share/fpcsrc/2.6.2/rtl/solaris/unxconst.inc
/usr/share/fpcsrc/2.6.2/rtl/solaris/unxfunc.inc
/usr/share/fpcsrc/2.6.2/rtl/solaris/unxsockh.inc
/usr/share/fpcsrc/2.6.2/rtl/solaris/x86_64/
/usr/share/fpcsrc/2.6.2/rtl/solaris/x86_64/sighnd.inc
/usr/share/fpcsrc/2.6.2/rtl/solaris/x86_64/sighndh.inc
/usr/share/fpcsrc/2.6.2/rtl/solaris/x86_64/start.inc