$ grep -ir fpc_initializeunits *
inc/compproc.inc:procedure fpc_InitializeUnits; compilerproc;
inc/system.inc:procedure fpc_InitializeUnits;[public,alias:'FPC_INITIALIZEUNITS']; compilerproc;
inc/system.inc:procedure internal_initializeunits; external name 'FPC_INITIALIZEUNITS';
java/jsystem.inc:procedure fpc_InitializeUnits;[public,alias:'FPC_INITIALIZEUNITS']; compilerproc;
java/jsystem.inc:procedure internal_initializeunits; external name 'FPC_INITIALIZEUNITS';
java/jcompproc.inc:procedure fpc_InitializeUnits; compilerproc;
$ grep -ir system.inc *
aix/system.pp:{$I system.inc}
amiga/system.pp:{$I system.inc}
aros/system.pp:{$I system.inc}
atari/system.pp: {$i system.inc}
beos/system.pp:{$I system.inc}
bsd/system.pp:{$I system.inc}
embedded/system.pp:{$I system.inc}
emx/system.pas:{$I system.inc}
fpmake.pp: AddInclude('system.inc',AllUnixOSes);
freertos/system.pp:{$I system.inc}
gba/system.pp:{$i system.inc}
go32v2/system.pp:{$I system.inc}
haiku/system.pp:{$I system.inc}
inc/readme:system.inc OS and Processor independent implementation part of system unit.
java/system.pp:{$i jsystem.inc}
linux/system.pp:{$I system.inc}
macos/system.pp:{$I system.inc}
morphos/system.pp:{$I system.inc}
msdos/system.pp:{$I system.inc}
msxdos/system.pp:{$I system.inc}
nativent/system.pp:{$I system.inc}
nds/system.pp:{$i system.inc}
netware/system.pp:{$I system.inc}
netwlibc/system.pp:{$I system.inc}
os2/system.pas:{$I system.inc}
palmos/system.pp:{$i system.inc}
qnx/system.pp:{$I system.inc}
sinclairql/system.pp: {$i system.inc}
solaris/system.pp:{$I system.inc}
symbian/system.pp:{$I system.inc}
wasi/system.pp:{$I system.inc}
watcom/system.pp:{$include system.inc}
wii/system.pp:{$i system.inc}
win16/system.pp:{$I system.inc}
win32/system.pp:{$I system.inc}
win64/system.pp:{$I system.inc}
wince/system.pp:{$I system.inc}
zxspectrum/system.pp:{$I system.inc}