From cb2d6757327635a86e942719fc12deccdb087e1e Mon Sep 17 00:00:00 2001
From: Pierre Muller <pierre@freepascal.org>
Date: Mon, 2 Oct 2023 22:32:29 +0200
Subject: [PATCH] Remove OS specific SYSTEMUNIT variable setting

---
 rtl/aix/Makefile.fpc        | 1 -
 rtl/amiga/Makefile.fpc      | 1 -
 rtl/android/Makefile.fpc    | 1 -
 rtl/aros/Makefile.fpc       | 1 -
 rtl/atari/Makefile.fpc      | 1 -
 rtl/beos/Makefile.fpc       | 1 -
 rtl/darwin/Makefile.fpc     | 1 -
 rtl/dragonfly/Makefile.fpc  | 1 -
 rtl/embedded/Makefile.fpc   | 1 -
 rtl/emx/Makefile.fpc        | 1 -
 rtl/freebsd/Makefile.fpc    | 1 -
 rtl/freertos/Makefile.fpc   | 1 -
 rtl/gba/Makefile.fpc        | 1 -
 rtl/go32v2/Makefile.fpc     | 1 -
 rtl/haiku/Makefile.fpc      | 1 -
 rtl/java/Makefile.fpc       | 1 -
 rtl/linux/Makefile.fpc      | 1 -
 rtl/macos/Makefile.fpc      | 1 -
 rtl/morphos/Makefile.fpc    | 1 -
 rtl/msdos/Makefile.fpc      | 1 -
 rtl/msxdos/Makefile.fpc     | 1 -
 rtl/nativent/Makefile.fpc   | 1 -
 rtl/nds/Makefile.fpc        | 1 -
 rtl/netbsd/Makefile.fpc     | 1 -
 rtl/netware/Makefile.fpc    | 1 -
 rtl/netwlibc/Makefile.fpc   | 1 -
 rtl/openbsd/Makefile.fpc    | 1 -
 rtl/os2/Makefile.fpc        | 1 -
 rtl/palmos/Makefile.fpc     | 1 -
 rtl/qnx/Makefile.fpc        | 1 -
 rtl/sinclairql/Makefile.fpc | 1 -
 rtl/solaris/Makefile.fpc    | 1 -
 rtl/symbian/Makefile.fpc    | 1 -
 rtl/wasi/Makefile.fpc       | 1 -
 rtl/watcom/Makefile.fpc     | 1 -
 rtl/wii/Makefile.fpc        | 1 -
 rtl/win16/Makefile.fpc      | 1 -
 rtl/win32/Makefile.fpc      | 1 -
 rtl/win64/Makefile.fpc      | 1 -
 rtl/wince/Makefile.fpc      | 1 -
 rtl/zxspectrum/Makefile.fpc | 1 -
 41 files changed, 41 deletions(-)

diff --git a/rtl/aix/Makefile.fpc b/rtl/aix/Makefile.fpc
index 97c82b0f3d..fe3f11f115 100644
--- a/rtl/aix/Makefile.fpc
+++ b/rtl/aix/Makefile.fpc
@@ -70,7 +70,6 @@ SYSUTILSDIR=$(UNIXINC)
 SYSUTILS_DEPS_OS = $(UNIXUNIT)$(PPUEXT) $(ERRORSUNIT)$(PPUEXT)
 
 
-SYSTEMUNIT=system
 
 
 ifeq ($(ARCH),i386)
diff --git a/rtl/amiga/Makefile.fpc b/rtl/amiga/Makefile.fpc
index 85bf210925..de6482e997 100644
--- a/rtl/amiga/Makefile.fpc
+++ b/rtl/amiga/Makefile.fpc
@@ -40,7 +40,6 @@ PROCINC=$(RTL)/$(CPU_TARGET)
 AMIINC=$(RTL)/amicommon
 UNITPREFIX=rtl
 LOADERS=prt0
-SYSTEMUNIT=system
 
 # Paths
 OBJPASDIR=$(RTL)/objpas
diff --git a/rtl/android/Makefile.fpc b/rtl/android/Makefile.fpc
index 414e8fb5c1..e3e474d3b7 100644
--- a/rtl/android/Makefile.fpc
+++ b/rtl/android/Makefile.fpc
@@ -81,7 +81,6 @@ ifeq ($(ARCH),i386)
 CPU_UNITS+=$(MMXUNIT)
 endif
 
-SYSTEMUNIT=system
 
 # Causes release PPU files not to be recompiled
 ifdef RELEASE
diff --git a/rtl/aros/Makefile.fpc b/rtl/aros/Makefile.fpc
index 214513afc6..afe22d7d83 100644
--- a/rtl/aros/Makefile.fpc
+++ b/rtl/aros/Makefile.fpc
@@ -42,7 +42,6 @@ PROCINC=$(RTL)/$(CPU_TARGET)
 AMIINC=$(RTL)/amicommon
 UNITPREFIX=rtl
 LOADERS=prt0
-SYSTEMUNIT=system
 SYSINITUNITS=si_prc
 
 # Paths
diff --git a/rtl/atari/Makefile.fpc b/rtl/atari/Makefile.fpc
index a6ab157790..6cacd90ade 100644
--- a/rtl/atari/Makefile.fpc
+++ b/rtl/atari/Makefile.fpc
@@ -38,7 +38,6 @@ COMMON=$(RTL)/common
 PROCINC=$(RTL)/$(CPU_TARGET)
 UNITPREFIX=rtl
 LOADERS=
-SYSTEMUNIT=system
 
 # Paths
 OBJPASDIR=$(RTL)/objpas
diff --git a/rtl/beos/Makefile.fpc b/rtl/beos/Makefile.fpc
index 68019a4a76..3c5f9c3f6f 100644
--- a/rtl/beos/Makefile.fpc
+++ b/rtl/beos/Makefile.fpc
@@ -53,7 +53,6 @@ INC=$(RTL)/inc
 PROCINC=$(RTL)/$(CPU_TARGET)
 UNIXINC=$(RTL)/unix
 UNITPREFIX=rtl
-SYSTEMUNIT=system
 BASEUNIXDIR=.
 ifndef FPC_DOTTEDUNITS
 RTLCONSTSUNIT=rtlconst
diff --git a/rtl/darwin/Makefile.fpc b/rtl/darwin/Makefile.fpc
index 5a1ca01ee9..f7e26e8e31 100644
--- a/rtl/darwin/Makefile.fpc
+++ b/rtl/darwin/Makefile.fpc
@@ -75,7 +75,6 @@ EXEINFO_DEPS_OS=$(BASEUNIXUNIT)$(PPUEXT) $(CTYPESUNIT)$(PPUEXT) $(DLUNIT)$(PPUEX
 FPEXTRES_DEPS_OS=$(BASEUNIXUNIT)$(PPUEXT)
 DOS_DEPS_OS=$(BASEUNIXUNIT)$(PPUEXT) $(UNIXUTILUNIT)$(PPUEXT) $(UNIXUNIT)$(PPUEXT)
 
-SYSTEMUNIT=system
 
 # Darwin requires libc, no syscalls
 override FPCOPT+=-dFPC_USE_LIBC
diff --git a/rtl/dragonfly/Makefile.fpc b/rtl/dragonfly/Makefile.fpc
index 4ad2da83bc..2f884ef0da 100644
--- a/rtl/dragonfly/Makefile.fpc
+++ b/rtl/dragonfly/Makefile.fpc
@@ -72,7 +72,6 @@ BASEUNIX_DEPS_OS=$(SYSCTLUNIT)$(PPUEXT)
 SYSUTILSDIR=$(UNIXINC)
 SYSUTILS_DEPS_OS = $(UNIXUNIT)$(PPUEXT) $(ERRORSUNIT)$(PPUEXT)
 
-SYSTEMUNIT=system
 loaders+=gprt0
 
 ifeq ($(ARCH),x86_64)
diff --git a/rtl/embedded/Makefile.fpc b/rtl/embedded/Makefile.fpc
index 51bf78760d..4572a42f89 100644
--- a/rtl/embedded/Makefile.fpc
+++ b/rtl/embedded/Makefile.fpc
@@ -43,7 +43,6 @@ INC=$(RTL)/inc
 COMMON=$(RTL)/common
 PROCINC=$(RTL)/$(CPU_TARGET)
 UNITPREFIX=rtl
-SYSTEMUNIT=system
 LOADERS=
 ifeq ($(ARCH),mipsel)
 ifeq ($(SUBARCH),pic32mx)
diff --git a/rtl/emx/Makefile.fpc b/rtl/emx/Makefile.fpc
index a9b73da6ea..0a24d1104f 100644
--- a/rtl/emx/Makefile.fpc
+++ b/rtl/emx/Makefile.fpc
@@ -49,7 +49,6 @@ DYNLIBS_DEPS_OS=$(DOSCALLSUNIT)$(PPUEXT)
 
 UNITPREFIX=rtl
 
-SYSTEMUNIT=system
 ifndef FPC_DOTTEDUNITS
 RTLCONSTSUNIT=rtlconst
 endif
diff --git a/rtl/freebsd/Makefile.fpc b/rtl/freebsd/Makefile.fpc
index af25be75cf..5b95a1af21 100644
--- a/rtl/freebsd/Makefile.fpc
+++ b/rtl/freebsd/Makefile.fpc
@@ -72,7 +72,6 @@ SYSCALL_DEPS_OS = sysnr.inc $(BSDPROCINC)/syscallh.inc
 SYSUTILSDIR=$(UNIXINC)
 SYSUTILS_DEPS_OS = $(UNIXUNIT)$(PPUEXT) $(ERRORSUNIT)$(PPUEXT)
 
-SYSTEMUNIT=system
 loaders+=gprt0
 
 ifeq ($(ARCH),i386)
diff --git a/rtl/freertos/Makefile.fpc b/rtl/freertos/Makefile.fpc
index a56629b6e0..692300de2f 100644
--- a/rtl/freertos/Makefile.fpc
+++ b/rtl/freertos/Makefile.fpc
@@ -44,7 +44,6 @@ INC=$(RTL)/inc
 COMMON=$(RTL)/common
 PROCINC=$(RTL)/$(CPU_TARGET)
 UNITPREFIX=rtl
-SYSTEMUNIT=system
 LOADERS=
 ifeq ($(ARCH),mipsel)
 ifeq ($(SUBARCH),pic32mx)
diff --git a/rtl/gba/Makefile.fpc b/rtl/gba/Makefile.fpc
index 0d5c01255b..f0bc2a0a65 100644
--- a/rtl/gba/Makefile.fpc
+++ b/rtl/gba/Makefile.fpc
@@ -37,7 +37,6 @@ INC=$(RTL)/inc
 COMMON=$(RTL)/common
 PROCINC=$(RTL)/$(CPU_TARGET)
 UNITPREFIX=rtl
-SYSTEMUNIT=system
 LOADERS=prt0 cprt0
 
 # Paths
diff --git a/rtl/go32v2/Makefile.fpc b/rtl/go32v2/Makefile.fpc
index c6127a01bb..799fc967b1 100644
--- a/rtl/go32v2/Makefile.fpc
+++ b/rtl/go32v2/Makefile.fpc
@@ -32,7 +32,6 @@ INC=../inc
 COMMON=$(RTL)/common
 PROCINC=../$(CPU_TARGET)
 UNITPREFIX=rtl
-SYSTEMUNIT=system
 ifndef FPC_DOTTEDUNITS
 RTLCONSTSUNIT=rtlconst
 endif
diff --git a/rtl/haiku/Makefile.fpc b/rtl/haiku/Makefile.fpc
index 3b262bf716..7c1f6fe3f9 100644
--- a/rtl/haiku/Makefile.fpc
+++ b/rtl/haiku/Makefile.fpc
@@ -77,7 +77,6 @@ override FPCOPT+=-dFPC_USE_LIBC
 
 # Paths
 OBJPASDIR=$(RTL)/objpas
-SYSTEMUNIT=system
 BASEUNIXDIR=.
 
 [rules]
diff --git a/rtl/java/Makefile.fpc b/rtl/java/Makefile.fpc
index 7371b886d7..c90b21aedc 100644
--- a/rtl/java/Makefile.fpc
+++ b/rtl/java/Makefile.fpc
@@ -28,7 +28,6 @@ INC=$(RTL)/inc
 COMMON=$(RTL)/common
 PROCINC=$(RTL)/$(CPU_TARGET)
 UNITPREFIX=rtl
-SYSTEMUNIT=system
 OBJPASDIR=../objpas
 
 ifdef RELEASE
diff --git a/rtl/linux/Makefile.fpc b/rtl/linux/Makefile.fpc
index d5488153a7..7d3f32ee45 100644
--- a/rtl/linux/Makefile.fpc
+++ b/rtl/linux/Makefile.fpc
@@ -153,7 +153,6 @@ override LOADERS=
 SYSINIT_UNITS=si_prc si_dll si_c si_g
 endif
 
-SYSTEMUNIT=system
 
 # Causes release PPU files not to be recompiled
 ifdef RELEASE
diff --git a/rtl/macos/Makefile.fpc b/rtl/macos/Makefile.fpc
index 5a563bd9d2..ec1545b0a2 100644
--- a/rtl/macos/Makefile.fpc
+++ b/rtl/macos/Makefile.fpc
@@ -44,7 +44,6 @@ DYNLIBS_DEPS_OS=$(DLUNIT)$(PPUEXT)
 DYNLIBSINCDIR=$(UNIXINC)
 
 UNITPREFIX=rtl
-SYSTEMUNIT=system
 
 # Paths
 OBJPASDIR=$(RTL)/objpas
diff --git a/rtl/morphos/Makefile.fpc b/rtl/morphos/Makefile.fpc
index 04e3920b1c..bb39d84049 100644
--- a/rtl/morphos/Makefile.fpc
+++ b/rtl/morphos/Makefile.fpc
@@ -41,7 +41,6 @@ COMMON=$(RTL)/common
 PROCINC=$(RTL)/$(CPU_TARGET)
 AMIINC=$(RTL)/amicommon
 UNITPREFIX=rtl
-SYSTEMUNIT=system
 SYSINITUNITS=si_prc
 
 # Paths
diff --git a/rtl/msdos/Makefile.fpc b/rtl/msdos/Makefile.fpc
index 38be0700ca..50a07ef949 100644
--- a/rtl/msdos/Makefile.fpc
+++ b/rtl/msdos/Makefile.fpc
@@ -32,7 +32,6 @@ INC=../inc
 COMMON=$(RTL)/common
 PROCINC=../$(CPU_TARGET)
 UNITPREFIX=rtl
-SYSTEMUNIT=system
 # OS specific dependencies
 SYSUTILS_DEPS_OS=$(DOSUNIT)$(PPUEXT)
 
diff --git a/rtl/msxdos/Makefile.fpc b/rtl/msxdos/Makefile.fpc
index e6bc94b894..b679c368ec 100644
--- a/rtl/msxdos/Makefile.fpc
+++ b/rtl/msxdos/Makefile.fpc
@@ -36,7 +36,6 @@ INC=../inc
 COMMON=$(RTL)/common
 PROCINC=../$(CPU_TARGET)
 UNITPREFIX=rtl
-SYSTEMUNIT=system
 
 DOS_DEPS_OS =  registers.inc $(INC)/dosh.inc $(INC)/dos.inc $(INC)/fexpand.inc
 
diff --git a/rtl/nativent/Makefile.fpc b/rtl/nativent/Makefile.fpc
index eedaa5e405..e3daf2abd1 100644
--- a/rtl/nativent/Makefile.fpc
+++ b/rtl/nativent/Makefile.fpc
@@ -51,7 +51,6 @@ NDKINC=ndk
 # Not used DYNLIBSINCDIR=$(WINDIR)
 
 UNITPREFIX=rtl
-SYSTEMUNIT=system
 
 CPU_UNITS=
 
diff --git a/rtl/nds/Makefile.fpc b/rtl/nds/Makefile.fpc
index deda0717a0..49cdee5bc0 100644
--- a/rtl/nds/Makefile.fpc
+++ b/rtl/nds/Makefile.fpc
@@ -37,7 +37,6 @@ INC=$(RTL)/inc
 COMMON=$(RTL)/common
 PROCINC=$(RTL)/$(CPU_TARGET)
 UNITPREFIX=rtl
-SYSTEMUNIT=system
 LOADERS=prt07 prt09 cprt07 cprt09
 
 ifdef RELEASE
diff --git a/rtl/netbsd/Makefile.fpc b/rtl/netbsd/Makefile.fpc
index c614e3bf46..11e3bf9187 100644
--- a/rtl/netbsd/Makefile.fpc
+++ b/rtl/netbsd/Makefile.fpc
@@ -70,7 +70,6 @@ SYSCALL_DEPS_OS = sysnr.inc $(BSDPROCINC)/syscallh.inc
 SYSUTILSDIR=$(UNIXINC)
 SYSUTILS_DEPS_OS = $(UNIXUNIT)$(PPUEXT) $(ERRORSUNIT)$(PPUEXT)
 
-SYSTEMUNIT=system
 LINUXUNIT=
 PRT0=prt0
 
diff --git a/rtl/netware/Makefile.fpc b/rtl/netware/Makefile.fpc
index 62c00fe052..1d05633e79 100644
--- a/rtl/netware/Makefile.fpc
+++ b/rtl/netware/Makefile.fpc
@@ -41,7 +41,6 @@ COMMON=$(RTL)/common
 PROCINC=$(RTL)/$(CPU_TARGET)
 
 UNITPREFIX=rtl
-SYSTEMUNIT=system
 ifndef FPC_DOTTEDUNITS
 RTLCONSTSUNIT=rtlconst
 endif
diff --git a/rtl/netwlibc/Makefile.fpc b/rtl/netwlibc/Makefile.fpc
index 66e1ba4d55..c080e1268f 100644
--- a/rtl/netwlibc/Makefile.fpc
+++ b/rtl/netwlibc/Makefile.fpc
@@ -46,7 +46,6 @@ IMPFILES=nwsnut.imp ws2_32.imp ws2nlm.imp libc.imp netware.imp \
 libcclib.imp
 # nwplibc.o
 
-SYSTEMUNIT=system
 SYSUTILS_DEPS_OS = $(DOSUNIT)$(PPUEXT) libc.pp
 
 #debug, -a: dont delete asm, -al include lines
diff --git a/rtl/openbsd/Makefile.fpc b/rtl/openbsd/Makefile.fpc
index 2dbbcb03ad..2db74a06b1 100644
--- a/rtl/openbsd/Makefile.fpc
+++ b/rtl/openbsd/Makefile.fpc
@@ -69,7 +69,6 @@ SYSCALL_DEPS_OS = sysnr.inc setsysnr.inc $(BSDPROCINC)/syscallh.inc
 SYSUTILSDIR=$(UNIXINC)
 SYSUTILS_DEPS_OS = $(UNIXUNIT)$(PPUEXT) $(ERRORSUNIT)$(PPUEXT)
 
-SYSTEMUNIT=system
 LINUXUNIT=
 PRT0=prt0
 
diff --git a/rtl/os2/Makefile.fpc b/rtl/os2/Makefile.fpc
index 1aac83fa65..7db286c1ec 100644
--- a/rtl/os2/Makefile.fpc
+++ b/rtl/os2/Makefile.fpc
@@ -52,7 +52,6 @@ DYNLIBS_DEPS_OS=$(DOSCALLSUNIT)$(PPUEXT)
 
 
 
-SYSTEMUNIT=system
 ifndef FPC_DOTTEDUNITS
 RTLCONSTSUNIT=rtlconst
 endif
diff --git a/rtl/palmos/Makefile.fpc b/rtl/palmos/Makefile.fpc
index 8a5d04e404..ebc0ef6e37 100644
--- a/rtl/palmos/Makefile.fpc
+++ b/rtl/palmos/Makefile.fpc
@@ -51,7 +51,6 @@ PROCINC=$(RTL)/$(CPU_TARGET)
 
 UNITPREFIX=rtl
 
-SYSTEMUNIT=system
 PRT0=prt0
 
 # Paths
diff --git a/rtl/qnx/Makefile.fpc b/rtl/qnx/Makefile.fpc
index e3ebeb4ab5..a318c53ada 100644
--- a/rtl/qnx/Makefile.fpc
+++ b/rtl/qnx/Makefile.fpc
@@ -35,7 +35,6 @@ POSIXINC=$(RTL)/qnx
 SYSCALLINC=$(RTL)/qnx/$(CPU_TARGET)
 
 UNITPREFIX=rtl
-SYSTEMUNIT=system
 SYSUTILSDIR=$(POSIXINC)
 SYSUTILS_DEPS_OS = $(DOSUNIT)$(PPUEXT)
 
diff --git a/rtl/sinclairql/Makefile.fpc b/rtl/sinclairql/Makefile.fpc
index 256d41a737..14709c19b5 100644
--- a/rtl/sinclairql/Makefile.fpc
+++ b/rtl/sinclairql/Makefile.fpc
@@ -37,7 +37,6 @@ COMMON=$(RTL)/common
 PROCINC=$(RTL)/$(CPU_TARGET)
 UNITPREFIX=rtl
 LOADERS=
-SYSTEMUNIT=system
 
 # Paths
 OBJPASDIR=$(RTL)/objpas
diff --git a/rtl/solaris/Makefile.fpc b/rtl/solaris/Makefile.fpc
index 369cb1163b..0c041404f8 100644
--- a/rtl/solaris/Makefile.fpc
+++ b/rtl/solaris/Makefile.fpc
@@ -66,7 +66,6 @@ TERMIO_DEPS_OS=$(UNIXTYPEUNIT)$(PPUEXT)
 SYSUTILSDIR=$(UNIXINC)
 SYSUTILS_DEPS_OS = $(UNIXUNIT)$(PPUEXT) $(ERRORSUNIT)$(PPUEXT)
 
-SYSTEMUNIT=system
 
 
 ifeq ($(ARCH),i386)
diff --git a/rtl/symbian/Makefile.fpc b/rtl/symbian/Makefile.fpc
index 1646f951a2..0373494a41 100644
--- a/rtl/symbian/Makefile.fpc
+++ b/rtl/symbian/Makefile.fpc
@@ -37,7 +37,6 @@ SYMBIANINC=./symbianinc
 UIQINC=./uiqinc
 
 UNITPREFIX=rtl
-SYSTEMUNIT=system
 ifndef FPC_DOTTEDUNITS
 RTLCONSTSUNIT=rtlconst
 endif
diff --git a/rtl/wasi/Makefile.fpc b/rtl/wasi/Makefile.fpc
index 59a5780479..6a30cce059 100644
--- a/rtl/wasi/Makefile.fpc
+++ b/rtl/wasi/Makefile.fpc
@@ -34,7 +34,6 @@ NSOSDIR=$(NSDIR)/wasi
 COMMON=$(RTL)/common
 PROCINC=../$(CPU_TARGET)
 UNITPREFIX=rtl
-SYSTEMUNIT=system
 SYSINIT_UNITS=si_prc si_dll
 RESUNIT=$(FPINTRESUNIT)
 # Paths
diff --git a/rtl/watcom/Makefile.fpc b/rtl/watcom/Makefile.fpc
index a3af5ecebe..1388e3c3b6 100644
--- a/rtl/watcom/Makefile.fpc
+++ b/rtl/watcom/Makefile.fpc
@@ -43,7 +43,6 @@ INC=../inc
 PROCINC=../$(CPU_TARGET)
 
 UNITPREFIX=rtl
-SYSTEMUNIT=system
 ifndef FPC_DOTTEDUNITS
 RTLCONSTSUNIT=rtlconst
 endif
diff --git a/rtl/wii/Makefile.fpc b/rtl/wii/Makefile.fpc
index ec080896e8..c4d9f0fcff 100644
--- a/rtl/wii/Makefile.fpc
+++ b/rtl/wii/Makefile.fpc
@@ -37,7 +37,6 @@ INC=$(RTL)/inc
 COMMON=$(RTL)/common
 PROCINC=$(RTL)/$(CPU_TARGET)
 UNITPREFIX=rtl
-SYSTEMUNIT=system
 override FPC_SYSTEM_OPT += @rtl.cfg
 
 ifdef RELEASE
diff --git a/rtl/win16/Makefile.fpc b/rtl/win16/Makefile.fpc
index f2c8c11839..eaa9c5c12f 100644
--- a/rtl/win16/Makefile.fpc
+++ b/rtl/win16/Makefile.fpc
@@ -28,7 +28,6 @@ INC=../inc
 COMMON=$(RTL)/common
 PROCINC=../$(CPU_TARGET)
 UNITPREFIX=rtl
-SYSTEMUNIT=system
 
 TYPES_DEPS_OS=$(WINTYPESUNIT)$(PPUEXT)
 DOS_DEPS_OS = registers.inc $(INC)/dosh.inc $(INC)/dos.inc $(INC)/fexpand.inc $(WINTYPESUNIT)$(PPUEXT) $(WINPROCSUNIT)$(PPUEXT)
diff --git a/rtl/win32/Makefile.fpc b/rtl/win32/Makefile.fpc
index 18b0bb2bec..6caad0200e 100644
--- a/rtl/win32/Makefile.fpc
+++ b/rtl/win32/Makefile.fpc
@@ -49,7 +49,6 @@ WINDIR=../win
 NSOSDIR=$(NSDIR)/windows
 
 UNITPREFIX=rtl
-SYSTEMUNIT=system
 DLLS=fpcmemdll
 CPU_UNITS=$(CPUUNIT) $(SIGNALSUNIT) $(MMXUNIT)
 # Paths
diff --git a/rtl/win64/Makefile.fpc b/rtl/win64/Makefile.fpc
index c294576c39..089ac48e0c 100644
--- a/rtl/win64/Makefile.fpc
+++ b/rtl/win64/Makefile.fpc
@@ -57,7 +57,6 @@ DYNLIBSINCDIR=$(WINDIR)
 TTHREADINCDIR=$(WINDIR)
 
 UNITPREFIX=rtl
-SYSTEMUNIT=system
 EXEINFO_DEPS_OS=$(WINDOWSUNIT)$(PPUEXT)
 # buildrtl contains charset
 # so let's state that $(CPALLUNIT) depends on buildrtl
diff --git a/rtl/wince/Makefile.fpc b/rtl/wince/Makefile.fpc
index 9fe043b153..be3e7d8693 100644
--- a/rtl/wince/Makefile.fpc
+++ b/rtl/wince/Makefile.fpc
@@ -52,7 +52,6 @@ WININC=$(WINDIR)/wininc
 
 UNITPREFIX=rtl
 
-SYSTEMUNIT=system
 PRT0=wprt0
 
 ifeq ($(ARCH),i386)
diff --git a/rtl/zxspectrum/Makefile.fpc b/rtl/zxspectrum/Makefile.fpc
index 257a08c1ed..8f1d1cb52c 100644
--- a/rtl/zxspectrum/Makefile.fpc
+++ b/rtl/zxspectrum/Makefile.fpc
@@ -23,7 +23,6 @@ INC=../inc
 COMMON=$(RTL)/common
 PROCINC=../$(CPU_TARGET)
 UNITPREFIX=rtl
-SYSTEMUNIT=system
 
 # Paths
 OBJPASDIR=$(RTL)/objpas