diff --git a/Make.rules.in b/Make.rules.in
index 52fdf9c7425..0a5a046c0a0 100644
--- a/Make.rules.in
+++ b/Make.rules.in
@@ -16,11 +16,8 @@ ALLCFLAGS    = $(DEFS) $(DLLFLAGS) $(EXTRACFLAGS) $(CPPFLAGS) $(CFLAGS) $(MODCFL
 IDLFLAGS     = $(DEFS) $(EXTRAIDLFLAGS)
 RCFLAGS      = --nostdinc $(PORCFLAGS) $(TARGETFLAGS) $(DEFS) $(EXTRARCFLAGS)
 
-IDL_GEN_C_SRCS  = $(IDL_C_SRCS:.idl=_c.c) $(IDL_I_SRCS:.idl=_i.c) \
-                  $(IDL_P_SRCS:.idl=_p.c) $(IDL_S_SRCS:.idl=_s.c)
-
-OBJS = $(C_SRCS:.c=.o) $(BISON_SRCS:.y=.tab.o) $(LEX_SRCS:.l=.yy.o) $(IDL_GEN_C_SRCS:.c=.o) $(OBJC_SRCS:.m=.o) \
-       $(IDL_R_SRCS:.idl=_r.res) $(IDL_TLB_RES) $(RC_SRCS:.rc=.res) $(MC_SRCS:.mc=.res) $(EXTRA_OBJS)
+OBJS = $(C_SRCS:.c=.o) $(BISON_SRCS:.y=.tab.o) $(LEX_SRCS:.l=.yy.o) $(OBJC_SRCS:.m=.o) \
+       $(RC_SRCS:.rc=.res) $(MC_SRCS:.mc=.res) $(EXTRA_OBJS)
 
 ALLCROSSCFLAGS = $(DEFS) -DWINE_CROSSTEST $(CPPFLAGS) $(CFLAGS)
 
diff --git a/dlls/actxprxy/Makefile.in b/dlls/actxprxy/Makefile.in
index 6fabb3dfd87..9cd1b47bd59 100644
--- a/dlls/actxprxy/Makefile.in
+++ b/dlls/actxprxy/Makefile.in
@@ -7,21 +7,7 @@ EXTRA_OBJS = dlldata.o
 C_SRCS = \
 	usrmarshal.c
 
-IDL_P_SRCS = \
-	actxprxy_activscp.idl \
-	actxprxy_comcat.idl \
-	actxprxy_docobj.idl \
-	actxprxy_hlink.idl \
-	actxprxy_htiface.idl \
-	actxprxy_htiframe.idl \
-	actxprxy_objsafe.idl \
-	actxprxy_ocmm.idl \
-	actxprxy_servprov.idl \
-	actxprxy_shldisp.idl \
-	actxprxy_shobjidl.idl \
-	actxprxy_urlhist.idl
-
-IDL_R_SRCS = \
+IDL_SRCS = \
 	actxprxy_activscp.idl \
 	actxprxy_comcat.idl \
 	actxprxy_docobj.idl \
diff --git a/dlls/advapi32/Makefile.in b/dlls/advapi32/Makefile.in
index 0a9709c717a..2179771e423 100644
--- a/dlls/advapi32/Makefile.in
+++ b/dlls/advapi32/Makefile.in
@@ -20,7 +20,7 @@ C_SRCS = \
 	security.c \
 	service.c
 
-IDL_C_SRCS = svcctl.idl
+IDL_SRCS = svcctl.idl
 
 RC_SRCS = version.rc
 
diff --git a/dlls/amstream/Makefile.in b/dlls/amstream/Makefile.in
index 35cfae1008c..1d08850314a 100644
--- a/dlls/amstream/Makefile.in
+++ b/dlls/amstream/Makefile.in
@@ -8,7 +8,7 @@ C_SRCS = \
 	mediastream.c \
 	mediastreamfilter.c
 
-IDL_R_SRCS = amstream_classes.idl
+IDL_SRCS = amstream_classes.idl
 
 RC_SRCS = version.rc
 
diff --git a/dlls/atl/Makefile.in b/dlls/atl/Makefile.in
index fb986f998d3..a18ecf52d90 100644
--- a/dlls/atl/Makefile.in
+++ b/dlls/atl/Makefile.in
@@ -5,6 +5,6 @@ EXTRADEFS = -D_ATL_VER=_ATL_VER_30
 
 C_SRCS = atl_main.c
 
-IDL_R_SRCS = atl_classes.idl
+IDL_SRCS = atl_classes.idl
 
 @MAKE_DLL_RULES@
diff --git a/dlls/avifil32/Makefile.in b/dlls/avifil32/Makefile.in
index 6fd6df5e3db..261330c9cc8 100644
--- a/dlls/avifil32/Makefile.in
+++ b/dlls/avifil32/Makefile.in
@@ -14,7 +14,7 @@ C_SRCS = \
 	tmpfile.c \
 	wavfile.c
 
-IDL_R_SRCS = avifil32.idl
+IDL_SRCS = avifil32.idl
 
 RC_SRCS = avifil32.rc
 
diff --git a/dlls/browseui/Makefile.in b/dlls/browseui/Makefile.in
index 3150f935e8b..013b277c00b 100644
--- a/dlls/browseui/Makefile.in
+++ b/dlls/browseui/Makefile.in
@@ -8,7 +8,7 @@ C_SRCS = \
 	compcatcachedaemon.c \
 	progressdlg.c
 
-IDL_R_SRCS = browseui_classes.idl
+IDL_SRCS = browseui_classes.idl
 
 RC_SRCS = browseui.rc
 
diff --git a/dlls/comdlg32/Makefile.in b/dlls/comdlg32/Makefile.in
index b0caaab09a8..e82282e7750 100644
--- a/dlls/comdlg32/Makefile.in
+++ b/dlls/comdlg32/Makefile.in
@@ -22,6 +22,6 @@ SVG_SRCS = \
 	pd32_nocollate.svg \
 	pd32_portrait.svg
 
-IDL_R_SRCS = comdlg32_classes.idl
+IDL_SRCS = comdlg32_classes.idl
 
 @MAKE_DLL_RULES@
diff --git a/dlls/d3dxof/Makefile.in b/dlls/d3dxof/Makefile.in
index cbcd7b77b19..b0d44432a8e 100644
--- a/dlls/d3dxof/Makefile.in
+++ b/dlls/d3dxof/Makefile.in
@@ -8,7 +8,7 @@ C_SRCS = \
 	mszip.c \
 	parsing.c
 
-IDL_R_SRCS = d3dxof.idl
+IDL_SRCS = d3dxof.idl
 
 RC_SRCS = version.rc
 
diff --git a/dlls/ddraw/Makefile.in b/dlls/ddraw/Makefile.in
index bc232f0e78d..9af0e4deb36 100644
--- a/dlls/ddraw/Makefile.in
+++ b/dlls/ddraw/Makefile.in
@@ -16,7 +16,7 @@ C_SRCS = \
 	vertexbuffer.c \
 	viewport.c
 
-IDL_R_SRCS = ddraw_classes.idl
+IDL_SRCS = ddraw_classes.idl
 
 RC_SRCS = version.rc
 
diff --git a/dlls/ddrawex/Makefile.in b/dlls/ddrawex/Makefile.in
index b52b66f3293..2fabcc56400 100644
--- a/dlls/ddrawex/Makefile.in
+++ b/dlls/ddrawex/Makefile.in
@@ -6,6 +6,6 @@ C_SRCS = \
 	main.c \
 	surface.c
 
-IDL_R_SRCS = ddrawex.idl
+IDL_SRCS = ddrawex.idl
 
 @MAKE_DLL_RULES@
diff --git a/dlls/devenum/Makefile.in b/dlls/devenum/Makefile.in
index 1971d4255cc..fa045062218 100644
--- a/dlls/devenum/Makefile.in
+++ b/dlls/devenum/Makefile.in
@@ -8,7 +8,7 @@ C_SRCS = \
 	mediacatenum.c \
 	parsedisplayname.c
 
-IDL_R_SRCS = devenum_classes.idl
+IDL_SRCS = devenum_classes.idl
 
 RC_SRCS = devenum.rc
 
diff --git a/dlls/dinput/Makefile.in b/dlls/dinput/Makefile.in
index f1ad6596135..d65407e1684 100644
--- a/dlls/dinput/Makefile.in
+++ b/dlls/dinput/Makefile.in
@@ -18,7 +18,7 @@ C_SRCS = \
 
 IMPLIB_SRCS = data_formats.c
 
-IDL_R_SRCS = dinput_classes.idl
+IDL_SRCS = dinput_classes.idl
 
 RC_SRCS = dinput.rc
 
diff --git a/dlls/dinput8/Makefile.in b/dlls/dinput8/Makefile.in
index e8d2d13c63c..c6601890740 100644
--- a/dlls/dinput8/Makefile.in
+++ b/dlls/dinput8/Makefile.in
@@ -5,7 +5,7 @@ IMPORTS   = uuid dxguid dinput ole32 advapi32
 C_SRCS = \
 	dinput8_main.c
 
-IDL_R_SRCS = dinput8.idl
+IDL_SRCS = dinput8.idl
 
 RC_SRCS = version.rc
 
diff --git a/dlls/dispex/Makefile.in b/dlls/dispex/Makefile.in
index aaa8c5eea2d..19d3083d644 100644
--- a/dlls/dispex/Makefile.in
+++ b/dlls/dispex/Makefile.in
@@ -7,10 +7,7 @@ EXTRA_OBJS = dlldata.o
 C_SRCS = \
 	usrmarshal.c
 
-IDL_P_SRCS = \
-	disp_ex.idl
-
-IDL_R_SRCS = \
+IDL_SRCS = \
 	disp_ex.idl
 
 @MAKE_DLL_RULES@
diff --git a/dlls/dmband/Makefile.in b/dlls/dmband/Makefile.in
index b25c071b4b1..72d149f909e 100644
--- a/dlls/dmband/Makefile.in
+++ b/dlls/dmband/Makefile.in
@@ -7,7 +7,7 @@ C_SRCS = \
 	dmband_main.c \
 	dmutils.c
 
-IDL_R_SRCS = dmband.idl
+IDL_SRCS = dmband.idl
 
 RC_SRCS = version.rc
 
diff --git a/dlls/dmcompos/Makefile.in b/dlls/dmcompos/Makefile.in
index da9dd9a9867..7aff9b31075 100644
--- a/dlls/dmcompos/Makefile.in
+++ b/dlls/dmcompos/Makefile.in
@@ -8,7 +8,7 @@ C_SRCS = \
 	dmcompos_main.c \
 	signposttrack.c
 
-IDL_R_SRCS = dmcompos.idl
+IDL_SRCS = dmcompos.idl
 
 RC_SRCS = version.rc
 
diff --git a/dlls/dmime/Makefile.in b/dlls/dmime/Makefile.in
index e31e75143d3..7caa9a28892 100644
--- a/dlls/dmime/Makefile.in
+++ b/dlls/dmime/Makefile.in
@@ -19,7 +19,7 @@ C_SRCS = \
 	timesigtrack.c \
 	wavetrack.c
 
-IDL_R_SRCS = dmime.idl
+IDL_SRCS = dmime.idl
 
 RC_SRCS = version.rc
 
diff --git a/dlls/dmloader/Makefile.in b/dlls/dmloader/Makefile.in
index d5d7bd90628..88f54b86124 100644
--- a/dlls/dmloader/Makefile.in
+++ b/dlls/dmloader/Makefile.in
@@ -8,7 +8,7 @@ C_SRCS = \
 	loader.c \
 	loaderstream.c
 
-IDL_R_SRCS = dmloader.idl
+IDL_SRCS = dmloader.idl
 
 RC_SRCS = version.rc
 
diff --git a/dlls/dmscript/Makefile.in b/dlls/dmscript/Makefile.in
index 7d17f227e4a..614dc1dd3a7 100644
--- a/dlls/dmscript/Makefile.in
+++ b/dlls/dmscript/Makefile.in
@@ -6,7 +6,7 @@ C_SRCS = \
 	script.c \
 	scripttrack.c
 
-IDL_R_SRCS = dmscript.idl
+IDL_SRCS = dmscript.idl
 
 RC_SRCS = rsrc.rc
 
diff --git a/dlls/dmstyle/Makefile.in b/dlls/dmstyle/Makefile.in
index 76bdea1f313..b6541ede92d 100644
--- a/dlls/dmstyle/Makefile.in
+++ b/dlls/dmstyle/Makefile.in
@@ -12,7 +12,7 @@ C_SRCS = \
 	style.c \
 	styletrack.c
 
-IDL_R_SRCS = dmstyle.idl
+IDL_SRCS = dmstyle.idl
 
 RC_SRCS = version.rc
 
diff --git a/dlls/dmsynth/Makefile.in b/dlls/dmsynth/Makefile.in
index 7d46b24c89a..72e83c3fb8f 100644
--- a/dlls/dmsynth/Makefile.in
+++ b/dlls/dmsynth/Makefile.in
@@ -6,7 +6,7 @@ C_SRCS = \
 	synth.c \
 	synthsink.c
 
-IDL_R_SRCS = dmsynth.idl
+IDL_SRCS = dmsynth.idl
 
 RC_SRCS = version.rc
 
diff --git a/dlls/dmusic/Makefile.in b/dlls/dmusic/Makefile.in
index 46aed5941d0..34b51d13d1e 100644
--- a/dlls/dmusic/Makefile.in
+++ b/dlls/dmusic/Makefile.in
@@ -11,7 +11,7 @@ C_SRCS = \
 	instrument.c \
 	port.c
 
-IDL_R_SRCS = dmusic.idl
+IDL_SRCS = dmusic.idl
 
 RC_SRCS = version.rc
 
diff --git a/dlls/dplayx/Makefile.in b/dlls/dplayx/Makefile.in
index 9c626593bf5..8c58eb1c87e 100644
--- a/dlls/dplayx/Makefile.in
+++ b/dlls/dplayx/Makefile.in
@@ -13,7 +13,7 @@ C_SRCS = \
 	lobbysp.c \
 	name_server.c
 
-IDL_R_SRCS = dplayx.idl
+IDL_SRCS = dplayx.idl
 
 RC_SRCS = version.rc
 
diff --git a/dlls/dpnet/Makefile.in b/dlls/dpnet/Makefile.in
index c71648137f7..40a5cf2d8b8 100644
--- a/dlls/dpnet/Makefile.in
+++ b/dlls/dpnet/Makefile.in
@@ -11,7 +11,7 @@ C_SRCS = \
 	server.c \
 	threadpool.c
 
-IDL_R_SRCS = dpnet.idl
+IDL_SRCS = dpnet.idl
 
 RC_SRCS = version.rc
 
diff --git a/dlls/dsound/Makefile.in b/dlls/dsound/Makefile.in
index 8258637b732..ce0015f7076 100644
--- a/dlls/dsound/Makefile.in
+++ b/dlls/dsound/Makefile.in
@@ -14,7 +14,7 @@ C_SRCS = \
 	propset.c \
 	sound3d.c
 
-IDL_R_SRCS = dsound_classes.idl
+IDL_SRCS = dsound_classes.idl
 
 RC_SRCS = version.rc
 
diff --git a/dlls/dswave/Makefile.in b/dlls/dswave/Makefile.in
index 0f6c609adb8..5b9f7a72806 100644
--- a/dlls/dswave/Makefile.in
+++ b/dlls/dswave/Makefile.in
@@ -5,7 +5,7 @@ C_SRCS = \
 	dswave.c \
 	dswave_main.c
 
-IDL_R_SRCS = dswave.idl
+IDL_SRCS = dswave.idl
 
 RC_SRCS = version.rc
 
diff --git a/dlls/dxdiagn/Makefile.in b/dlls/dxdiagn/Makefile.in
index 65a0c3b97e4..7f2beb10d95 100644
--- a/dlls/dxdiagn/Makefile.in
+++ b/dlls/dxdiagn/Makefile.in
@@ -8,8 +8,8 @@ C_SRCS = \
 
 RC_SRCS = dxdiagn.rc
 
-IDL_H_SRCS = fil_data.idl
-
-IDL_R_SRCS = dxdiagn.idl
+IDL_SRCS = \
+	dxdiagn.idl \
+	fil_data.idl
 
 @MAKE_DLL_RULES@
diff --git a/dlls/explorerframe/Makefile.in b/dlls/explorerframe/Makefile.in
index 03f4a23205a..67037112a1f 100644
--- a/dlls/explorerframe/Makefile.in
+++ b/dlls/explorerframe/Makefile.in
@@ -6,7 +6,7 @@ C_SRCS = \
 	nstc.c \
 	taskbarlist.c
 
-IDL_R_SRCS = explorerframe.idl
+IDL_SRCS = explorerframe.idl
 
 RC_SRCS = \
 	version.rc
diff --git a/dlls/gameux/Makefile.in b/dlls/gameux/Makefile.in
index f3d4612c383..fd7a73f28cc 100644
--- a/dlls/gameux/Makefile.in
+++ b/dlls/gameux/Makefile.in
@@ -7,7 +7,7 @@ C_SRCS = \
 	gamestatistics.c \
 	main.c
 
-IDL_TLB_SRCS = gameux_tlb.idl
+IDL_SRCS = gameux_tlb.idl
 
 RC_SRCS = rsrc.rc
 
diff --git a/dlls/hhctrl.ocx/Makefile.in b/dlls/hhctrl.ocx/Makefile.in
index 326f6cc1d6b..87f12ecb677 100644
--- a/dlls/hhctrl.ocx/Makefile.in
+++ b/dlls/hhctrl.ocx/Makefile.in
@@ -12,7 +12,7 @@ C_SRCS = \
 	stream.c \
 	webbrowser.c
 
-IDL_TLB_SRCS = hhctrl_tlb.idl
+IDL_SRCS = hhctrl_tlb.idl
 
 RC_SRCS = hhctrl.rc
 
diff --git a/dlls/hlink/Makefile.in b/dlls/hlink/Makefile.in
index a387802d4b7..5cac2dfe6df 100644
--- a/dlls/hlink/Makefile.in
+++ b/dlls/hlink/Makefile.in
@@ -9,6 +9,6 @@ C_SRCS = \
 	hlink_main.c \
 	link.c
 
-IDL_R_SRCS = hlink_classes.idl
+IDL_SRCS = hlink_classes.idl
 
 @MAKE_DLL_RULES@
diff --git a/dlls/hnetcfg/Makefile.in b/dlls/hnetcfg/Makefile.in
index 165152d5596..07c781396f1 100644
--- a/dlls/hnetcfg/Makefile.in
+++ b/dlls/hnetcfg/Makefile.in
@@ -10,7 +10,8 @@ C_SRCS = \
 	profile.c \
 	service.c
 
-IDL_R_SRCS = hnetcfg.idl
-IDL_TLB_SRCS = hnetcfg_tlb.idl
+IDL_SRCS = \
+	hnetcfg.idl \
+	hnetcfg_tlb.idl
 
 @MAKE_DLL_RULES@
diff --git a/dlls/ieframe/Makefile.in b/dlls/ieframe/Makefile.in
index bddb23f20de..13a304df379 100644
--- a/dlls/ieframe/Makefile.in
+++ b/dlls/ieframe/Makefile.in
@@ -27,7 +27,6 @@ RC_SRCS = ieframe.rc
 SVG_SRCS = \
 	ietoolbar.svg
 
-IDL_TLB_SRCS = ieframe_v1.idl
-IDL_R_SRCS   = ieframe_v1.idl
+IDL_SRCS = ieframe_v1.idl
 
 @MAKE_DLL_RULES@
diff --git a/dlls/inetcomm/Makefile.in b/dlls/inetcomm/Makefile.in
index ffc8f3984c5..f1cf17a0b26 100644
--- a/dlls/inetcomm/Makefile.in
+++ b/dlls/inetcomm/Makefile.in
@@ -11,6 +11,6 @@ C_SRCS = \
 	pop3transport.c \
 	smtptransport.c
 
-IDL_R_SRCS = inetcomm.idl
+IDL_SRCS = inetcomm.idl
 
 @MAKE_DLL_RULES@
diff --git a/dlls/infosoft/Makefile.in b/dlls/infosoft/Makefile.in
index 3acc7c97017..63a693dcbff 100644
--- a/dlls/infosoft/Makefile.in
+++ b/dlls/infosoft/Makefile.in
@@ -5,6 +5,6 @@ C_SRCS = \
 	infosoft_main.c \
 	wordbreaker.c
 
-IDL_R_SRCS = infosoft.idl
+IDL_SRCS = infosoft.idl
 
 @MAKE_DLL_RULES@
diff --git a/dlls/inseng/Makefile.in b/dlls/inseng/Makefile.in
index ea053cf9ed3..c496e9ba303 100644
--- a/dlls/inseng/Makefile.in
+++ b/dlls/inseng/Makefile.in
@@ -4,6 +4,6 @@ IMPORTS   = uuid ole32 advapi32
 C_SRCS = \
 	inseng_main.c
 
-IDL_R_SRCS = inseng.idl
+IDL_SRCS = inseng.idl
 
 @MAKE_DLL_RULES@
diff --git a/dlls/itss/Makefile.in b/dlls/itss/Makefile.in
index af7aee47792..2fbeb69621f 100644
--- a/dlls/itss/Makefile.in
+++ b/dlls/itss/Makefile.in
@@ -9,7 +9,7 @@ C_SRCS = \
 	protocol.c \
 	storage.c
 
-IDL_R_SRCS = itss.idl
+IDL_SRCS = itss.idl
 
 RC_SRCS = rsrc.rc
 
diff --git a/dlls/jscript/Makefile.in b/dlls/jscript/Makefile.in
index 9078b04651b..c049ddeb9ed 100644
--- a/dlls/jscript/Makefile.in
+++ b/dlls/jscript/Makefile.in
@@ -28,8 +28,9 @@ C_SRCS = \
 
 RC_SRCS = jscript.rc
 
-IDL_TLB_SRCS = jsglobal.idl
-IDL_R_SRCS = jscript_classes.idl
+IDL_SRCS = \
+	jscript_classes.idl \
+	jsglobal.idl
 
 BISON_SRCS = \
 	parser.y
diff --git a/dlls/mlang/Makefile.in b/dlls/mlang/Makefile.in
index a066b5379dc..92b9902359a 100644
--- a/dlls/mlang/Makefile.in
+++ b/dlls/mlang/Makefile.in
@@ -6,6 +6,6 @@ DELAYIMPORTS = oleaut32
 C_SRCS = \
 	mlang.c
 
-IDL_R_SRCS = mlang_classes.idl
+IDL_SRCS = mlang_classes.idl
 
 @MAKE_DLL_RULES@
diff --git a/dlls/mmcndmgr/Makefile.in b/dlls/mmcndmgr/Makefile.in
index 91038a29966..c4d35b6a2bb 100644
--- a/dlls/mmcndmgr/Makefile.in
+++ b/dlls/mmcndmgr/Makefile.in
@@ -4,6 +4,6 @@ IMPORTS   = uuid oleaut32 ole32 user32
 C_SRCS = \
 	mmcndmgr.c
 
-IDL_TLB_SRCS = mmcndmgr.idl
+IDL_SRCS = mmcndmgr.idl
 
 @MAKE_DLL_RULES@
diff --git a/dlls/mmdevapi/Makefile.in b/dlls/mmdevapi/Makefile.in
index e0f8c842cdb..8b767d93502 100644
--- a/dlls/mmdevapi/Makefile.in
+++ b/dlls/mmdevapi/Makefile.in
@@ -6,6 +6,6 @@ C_SRCS = \
 	devenum.c \
 	main.c
 
-IDL_R_SRCS = mmdevapi_classes.idl
+IDL_SRCS = mmdevapi_classes.idl
 
 @MAKE_DLL_RULES@
diff --git a/dlls/mscoree/Makefile.in b/dlls/mscoree/Makefile.in
index 114b130d5fd..c67e1720dc6 100644
--- a/dlls/mscoree/Makefile.in
+++ b/dlls/mscoree/Makefile.in
@@ -10,6 +10,6 @@ C_SRCS = \
 	metahost.c \
 	mscoree_main.c
 
-IDL_R_SRCS = mscoree_classes.idl
+IDL_SRCS = mscoree_classes.idl
 
 @MAKE_DLL_RULES@
diff --git a/dlls/msctf/Makefile.in b/dlls/msctf/Makefile.in
index 6044ee8b21f..8e1aee7c9e3 100644
--- a/dlls/msctf/Makefile.in
+++ b/dlls/msctf/Makefile.in
@@ -13,7 +13,7 @@ C_SRCS = \
 	range.c \
 	threadmgr.c
 
-IDL_R_SRCS = msctf_classes.idl
+IDL_SRCS = msctf_classes.idl
 
 RC_SRCS = \
 	version.rc
diff --git a/dlls/msdaps/Makefile.in b/dlls/msdaps/Makefile.in
index 3f3d619fdf5..bcfde216f12 100644
--- a/dlls/msdaps/Makefile.in
+++ b/dlls/msdaps/Makefile.in
@@ -10,11 +10,7 @@ C_SRCS = \
 	row_server.c \
 	usrmarshal.c
 
-IDL_P_SRCS = \
-	msdaps.idl \
-	row_server.idl
-
-IDL_R_SRCS = \
+IDL_SRCS = \
 	msdaps.idl \
 	row_server.idl
 
diff --git a/dlls/mshtml.tlb/Makefile.in b/dlls/mshtml.tlb/Makefile.in
index 3215cbc0816..49d00f885e0 100644
--- a/dlls/mshtml.tlb/Makefile.in
+++ b/dlls/mshtml.tlb/Makefile.in
@@ -1,5 +1,5 @@
 MODULE    = mshtml.tlb
 
-IDL_TLB_SRCS = mshtml_tlb.idl
+IDL_SRCS = mshtml_tlb.idl
 
 @MAKE_DLL_RULES@
diff --git a/dlls/mshtml/Makefile.in b/dlls/mshtml/Makefile.in
index bae6dffd660..fe1ca569b8a 100644
--- a/dlls/mshtml/Makefile.in
+++ b/dlls/mshtml/Makefile.in
@@ -81,8 +81,8 @@ C_SRCS = \
 
 RC_SRCS = mshtml.rc
 
-IDL_H_SRCS = nsiface.idl
-
-IDL_R_SRCS = mshtml_classes.idl
+IDL_SRCS = \
+	mshtml_classes.idl \
+	nsiface.idl
 
 @MAKE_DLL_RULES@
diff --git a/dlls/mshtml/tests/Makefile.in b/dlls/mshtml/tests/Makefile.in
index 64711569ab7..43337d5f9ef 100644
--- a/dlls/mshtml/tests/Makefile.in
+++ b/dlls/mshtml/tests/Makefile.in
@@ -11,7 +11,7 @@ C_SRCS = \
 	script.c \
 	style.c
 
-IDL_TLB_SRCS = test_tlb.idl
+IDL_SRCS = test_tlb.idl
 
 RC_SRCS = rsrc.rc
 
diff --git a/dlls/msi/Makefile.in b/dlls/msi/Makefile.in
index 36cf303d528..0405d59d637 100644
--- a/dlls/msi/Makefile.in
+++ b/dlls/msi/Makefile.in
@@ -44,9 +44,7 @@ C_SRCS = \
 	upgrade.c \
 	where.c
 
-IDL_I_SRCS = msiserver.idl
-IDL_R_SRCS = msiserver.idl
-IDL_TLB_SRCS = msiserver.idl
+IDL_SRCS = msiserver.idl
 
 BISON_SRCS = \
 	cond.y \
diff --git a/dlls/msident/Makefile.in b/dlls/msident/Makefile.in
index 29ebb8ed902..d419de11625 100644
--- a/dlls/msident/Makefile.in
+++ b/dlls/msident/Makefile.in
@@ -3,6 +3,6 @@ MODULE    = msident.dll
 C_SRCS = \
 	msident.c
 
-IDL_R_SRCS = msident_classes.idl
+IDL_SRCS = msident_classes.idl
 
 @MAKE_DLL_RULES@
diff --git a/dlls/msimtf/Makefile.in b/dlls/msimtf/Makefile.in
index d781544564e..32a4a854802 100644
--- a/dlls/msimtf/Makefile.in
+++ b/dlls/msimtf/Makefile.in
@@ -5,6 +5,6 @@ C_SRCS = \
 	activeimmapp.c \
 	main.c
 
-IDL_R_SRCS = msimtf.idl
+IDL_SRCS = msimtf.idl
 
 @MAKE_DLL_RULES@
diff --git a/dlls/mstask/Makefile.in b/dlls/mstask/Makefile.in
index a4559d1b3c5..9c535bc784a 100644
--- a/dlls/mstask/Makefile.in
+++ b/dlls/mstask/Makefile.in
@@ -8,7 +8,7 @@ C_SRCS = \
 	task_scheduler.c \
 	task_trigger.c
 
-IDL_I_SRCS = mstask_local.idl
-IDL_R_SRCS = mstask_local.idl
+IDL_SRCS = \
+	mstask_local.idl
 
 @MAKE_DLL_RULES@
diff --git a/dlls/msxml/Makefile.in b/dlls/msxml/Makefile.in
index a50888d1f59..442d90c6f00 100644
--- a/dlls/msxml/Makefile.in
+++ b/dlls/msxml/Makefile.in
@@ -2,7 +2,7 @@ MODULE = msxml.dll
 
 C_SRCS = main.c
 
-IDL_TLB_SRCS = msxml_tlb.idl
+IDL_SRCS = msxml_tlb.idl
 
 RC_SRCS = rsrc.rc
 
diff --git a/dlls/msxml2/Makefile.in b/dlls/msxml2/Makefile.in
index 418de00c7ff..d064be02281 100644
--- a/dlls/msxml2/Makefile.in
+++ b/dlls/msxml2/Makefile.in
@@ -2,6 +2,6 @@ MODULE = msxml2.dll
 
 C_SRCS = main.c
 
-IDL_TLB_SRCS = msxml2_tlb.idl
+IDL_SRCS = msxml2_tlb.idl
 
 @MAKE_DLL_RULES@
diff --git a/dlls/msxml3/Makefile.in b/dlls/msxml3/Makefile.in
index ed4c039ba10..5245069672a 100644
--- a/dlls/msxml3/Makefile.in
+++ b/dlls/msxml3/Makefile.in
@@ -45,8 +45,8 @@ RC_SRCS = \
 	schemas.rc \
 	version.rc
 
-IDL_R_SRCS = xmlparser.idl
-
-IDL_TLB_SRCS = msxml3_v1.idl
+IDL_SRCS = \
+	msxml3_v1.idl \
+	xmlparser.idl
 
 @MAKE_DLL_RULES@
diff --git a/dlls/msxml3/tests/Makefile.in b/dlls/msxml3/tests/Makefile.in
index 345d4549436..2daedd5ae5c 100644
--- a/dlls/msxml3/tests/Makefile.in
+++ b/dlls/msxml3/tests/Makefile.in
@@ -10,7 +10,7 @@ C_SRCS = \
 	xmlparser.c \
 	xmlview.c
 
-IDL_H_SRCS = xmlparser.idl
+IDL_SRCS = xmlparser.idl
 
 RC_SRCS = rsrc.rc
 
diff --git a/dlls/msxml4/Makefile.in b/dlls/msxml4/Makefile.in
index eb2eca53934..0b87ef1648f 100644
--- a/dlls/msxml4/Makefile.in
+++ b/dlls/msxml4/Makefile.in
@@ -4,7 +4,7 @@ IMPORTS   = ole32 advapi32
 C_SRCS = \
 	main.c
 
-IDL_TLB_SRCS = msxml4_tlb.idl
+IDL_SRCS = msxml4_tlb.idl
 
 RC_SRCS = rsrc.rc
 
diff --git a/dlls/msxml6/Makefile.in b/dlls/msxml6/Makefile.in
index 9f4a7d2a512..bf7ed6c034d 100644
--- a/dlls/msxml6/Makefile.in
+++ b/dlls/msxml6/Makefile.in
@@ -6,6 +6,6 @@ C_SRCS = \
 
 RC_SRCS = rsrc.rc
 
-IDL_TLB_SRCS = msxml6_tlb.idl
+IDL_SRCS = msxml6_tlb.idl
 
 @MAKE_DLL_RULES@
diff --git a/dlls/objsel/Makefile.in b/dlls/objsel/Makefile.in
index 464f9088769..e4c20cad8d0 100644
--- a/dlls/objsel/Makefile.in
+++ b/dlls/objsel/Makefile.in
@@ -5,7 +5,7 @@ C_SRCS = \
 	factory.c \
 	objsel.c
 
-IDL_R_SRCS = objsel_classes.idl
+IDL_SRCS = objsel_classes.idl
 
 RC_SRCS = objsel.rc
 
diff --git a/dlls/ole32/Makefile.in b/dlls/ole32/Makefile.in
index 8174f288559..71869a008fc 100644
--- a/dlls/ole32/Makefile.in
+++ b/dlls/ole32/Makefile.in
@@ -43,17 +43,9 @@ C_SRCS = \
 
 RC_SRCS = ole32res.rc
 
-IDL_C_SRCS = \
-	irot.idl
-
-IDL_P_SRCS = \
-	dcom.idl \
-	ole32_objidl.idl \
-	ole32_oleidl.idl \
-	ole32_unknwn.idl
-
-IDL_R_SRCS = \
+IDL_SRCS = \
 	dcom.idl \
+	irot.idl \
 	ole32_objidl.idl \
 	ole32_oleidl.idl \
 	ole32_unknwn.idl
diff --git a/dlls/oleacc/Makefile.in b/dlls/oleacc/Makefile.in
index 4d5b0f2abde..a8a809c54fd 100644
--- a/dlls/oleacc/Makefile.in
+++ b/dlls/oleacc/Makefile.in
@@ -5,7 +5,7 @@ IMPORTS   = user32
 C_SRCS = \
 	main.c
 
-IDL_TLB_SRCS = oleacc_classes.idl
+IDL_SRCS = oleacc_classes.idl
 
 RC_SRCS = oleacc.rc
 
diff --git a/dlls/oleaut32/Makefile.in b/dlls/oleaut32/Makefile.in
index f14d2bf9e4e..caf4098232a 100644
--- a/dlls/oleaut32/Makefile.in
+++ b/dlls/oleaut32/Makefile.in
@@ -23,11 +23,7 @@ C_SRCS = \
 
 RC_SRCS = oleaut32.rc
 
-IDL_P_SRCS = \
-	oleaut32_oaidl.idl \
-	oleaut32_ocidl.idl
-
-IDL_R_SRCS = \
+IDL_SRCS = \
 	oleaut32_oaidl.idl \
 	oleaut32_ocidl.idl
 
diff --git a/dlls/oleaut32/tests/Makefile.in b/dlls/oleaut32/tests/Makefile.in
index e47e2fe0035..b2e2bd828fe 100644
--- a/dlls/oleaut32/tests/Makefile.in
+++ b/dlls/oleaut32/tests/Makefile.in
@@ -15,11 +15,7 @@ C_SRCS = \
 
 RC_SRCS = tmarshal.rc
 
-IDL_I_SRCS = \
-	test_reg.idl \
-	tmarshal.idl
-
-IDL_TLB_SRCS = \
+IDL_SRCS = \
 	test_reg.idl \
 	test_tlb.idl \
 	tmarshal.idl
diff --git a/dlls/oledb32/Makefile.in b/dlls/oledb32/Makefile.in
index 449913a3cab..871cb6dcea7 100644
--- a/dlls/oledb32/Makefile.in
+++ b/dlls/oledb32/Makefile.in
@@ -9,10 +9,9 @@ C_SRCS = \
 	main.c \
 	rowpos.c
 
-IDL_I_SRCS = convert.idl
-
-IDL_R_SRCS = oledb32_classes.idl
-
-IDL_TLB_SRCS = oledb32_typelib.idl
+IDL_SRCS = \
+	convert.idl \
+	oledb32_classes.idl \
+	oledb32_typelib.idl
 
 @MAKE_DLL_RULES@
diff --git a/dlls/oledb32/tests/Makefile.in b/dlls/oledb32/tests/Makefile.in
index bb1f0b3b839..051ffefced4 100644
--- a/dlls/oledb32/tests/Makefile.in
+++ b/dlls/oledb32/tests/Makefile.in
@@ -6,6 +6,6 @@ C_SRCS = \
 	database.c \
 	marshal.c
 
-IDL_I_SRCS = convert.idl
+IDL_SRCS = convert.idl
 
 @MAKE_TEST_RULES@
diff --git a/dlls/propsys/Makefile.in b/dlls/propsys/Makefile.in
index 3287a8b9c70..4a15b5de36d 100644
--- a/dlls/propsys/Makefile.in
+++ b/dlls/propsys/Makefile.in
@@ -7,6 +7,6 @@ C_SRCS = \
 	propsys_main.c \
 	propvar.c
 
-IDL_R_SRCS = propsys_classes.idl
+IDL_SRCS = propsys_classes.idl
 
 @MAKE_DLL_RULES@
diff --git a/dlls/pstorec/Makefile.in b/dlls/pstorec/Makefile.in
index 749fe8b2093..b466d63607f 100644
--- a/dlls/pstorec/Makefile.in
+++ b/dlls/pstorec/Makefile.in
@@ -4,6 +4,6 @@ IMPORTS   = uuid
 C_SRCS = \
 	pstorec.c
 
-IDL_TLB_SRCS = pstorec_tlb.idl
+IDL_SRCS = pstorec_tlb.idl
 
 @MAKE_DLL_RULES@
diff --git a/dlls/qedit/Makefile.in b/dlls/qedit/Makefile.in
index 97a4cc7a884..7de256567bf 100644
--- a/dlls/qedit/Makefile.in
+++ b/dlls/qedit/Makefile.in
@@ -6,6 +6,6 @@ C_SRCS = \
 	mediadet.c \
 	samplegrabber.c
 
-IDL_R_SRCS = qedit_classes.idl
+IDL_SRCS = qedit_classes.idl
 
 @MAKE_DLL_RULES@
diff --git a/dlls/qmgr/Makefile.in b/dlls/qmgr/Makefile.in
index e481ac4b9a1..4985514b5c3 100644
--- a/dlls/qmgr/Makefile.in
+++ b/dlls/qmgr/Makefile.in
@@ -13,6 +13,6 @@ C_SRCS = \
 
 RC_SRCS = rsrc.rc
 
-IDL_I_SRCS = qmgr_local.idl
+IDL_SRCS = qmgr_local.idl
 
 @MAKE_DLL_RULES@
diff --git a/dlls/qmgrprxy/Makefile.in b/dlls/qmgrprxy/Makefile.in
index bba3e25ef64..d520fe78b1b 100644
--- a/dlls/qmgrprxy/Makefile.in
+++ b/dlls/qmgrprxy/Makefile.in
@@ -2,9 +2,7 @@ MODULE    = qmgrprxy.dll
 IMPORTS   = rpcrt4
 EXTRADEFS = -DWINE_REGISTER_DLL
 
-IDL_I_SRCS = qmgrprxy.idl
-IDL_P_SRCS = qmgrprxy.idl
-IDL_R_SRCS = qmgrprxy.idl
+IDL_SRCS = qmgrprxy.idl
 
 EXTRA_OBJS = dlldata.o
 
diff --git a/dlls/quartz/Makefile.in b/dlls/quartz/Makefile.in
index 24be02ec971..9a6057d15fd 100644
--- a/dlls/quartz/Makefile.in
+++ b/dlls/quartz/Makefile.in
@@ -29,10 +29,10 @@ C_SRCS = \
 
 RC_SRCS = version.rc
 
-IDL_H_SRCS = fil_data.idl
-IDL_P_SRCS = quartz_strmif.idl
-IDL_R_SRCS = quartz_strmif.idl
-IDL_TLB_SRCS = control_tlb.idl
+IDL_SRCS = \
+	control_tlb.idl \
+	fil_data.idl \
+	quartz_strmif.idl
 
 EXTRA_OBJS = dlldata.o
 
diff --git a/dlls/quartz/tests/Makefile.in b/dlls/quartz/tests/Makefile.in
index ae5fbaca57d..6a1d211ce5c 100644
--- a/dlls/quartz/tests/Makefile.in
+++ b/dlls/quartz/tests/Makefile.in
@@ -11,6 +11,6 @@ C_SRCS = \
 	referenceclock.c \
 	videorenderer.c
 
-IDL_H_SRCS = fil_data.idl
+IDL_SRCS = fil_data.idl
 
 @MAKE_TEST_RULES@
diff --git a/dlls/rpcrt4/Makefile.in b/dlls/rpcrt4/Makefile.in
index 8326cf5a1d8..fcb48b8e274 100644
--- a/dlls/rpcrt4/Makefile.in
+++ b/dlls/rpcrt4/Makefile.in
@@ -27,7 +27,6 @@ C_SRCS = \
 
 RC_SRCS = version.rc
 
-IDL_C_SRCS = \
-	epm.idl
+IDL_SRCS = epm.idl
 
 @MAKE_DLL_RULES@
diff --git a/dlls/rpcrt4/tests/Makefile.in b/dlls/rpcrt4/tests/Makefile.in
index 75a22788cd6..f7a31da9f78 100644
--- a/dlls/rpcrt4/tests/Makefile.in
+++ b/dlls/rpcrt4/tests/Makefile.in
@@ -2,9 +2,6 @@ TESTDLL   = rpcrt4.dll
 IMPORTS   = ole32 rpcrt4 advapi32
 EXTRAIDLFLAGS = --prefix-server=s_
 
-IDL_C_SRCS = server.idl
-IDL_S_SRCS = server.idl
-
 C_SRCS = \
 	cstub.c \
 	generated.c \
@@ -14,4 +11,6 @@ C_SRCS = \
 	rpc_protseq.c \
 	server.c
 
+IDL_SRCS = server.idl
+
 @MAKE_TEST_RULES@
diff --git a/dlls/scrrun/Makefile.in b/dlls/scrrun/Makefile.in
index 362cba79cb3..d684c365707 100644
--- a/dlls/scrrun/Makefile.in
+++ b/dlls/scrrun/Makefile.in
@@ -8,6 +8,6 @@ C_SRCS = \
 
 RC_SRCS = scrrun.rc
 
-IDL_TLB_SRCS = scrrun.idl
+IDL_SRCS = scrrun.idl
 
 @MAKE_DLL_RULES@
diff --git a/dlls/scrrun/tests/Makefile.in b/dlls/scrrun/tests/Makefile.in
index d9d1679ad86..27f8a997557 100644
--- a/dlls/scrrun/tests/Makefile.in
+++ b/dlls/scrrun/tests/Makefile.in
@@ -5,6 +5,6 @@ C_SRCS = \
 	dictionary.c \
 	filesystem.c
 
-IDL_H_SRCS = scrrun.idl
+IDL_SRCS = scrrun.idl
 
 @MAKE_TEST_RULES@
diff --git a/dlls/shdocvw/Makefile.in b/dlls/shdocvw/Makefile.in
index 74fad95ea64..316a1a04f6e 100644
--- a/dlls/shdocvw/Makefile.in
+++ b/dlls/shdocvw/Makefile.in
@@ -11,6 +11,6 @@ C_SRCS = \
 RC_SRCS = \
 	shdocvw.rc
 
-IDL_TLB_SRCS = shdocvw_v1.idl
+IDL_SRCS = shdocvw_v1.idl
 
 @MAKE_DLL_RULES@
diff --git a/dlls/shell32/Makefile.in b/dlls/shell32/Makefile.in
index c0b2e5a6f3e..8a4c71d487e 100644
--- a/dlls/shell32/Makefile.in
+++ b/dlls/shell32/Makefile.in
@@ -57,9 +57,9 @@ C_SRCS = \
 
 RC_SRCS = shell32.rc
 
-IDL_TLB_SRCS = shell32_tlb.idl
-
-IDL_R_SRCS = shell32_classes.idl
+IDL_SRCS = \
+	shell32_classes.idl \
+	shell32_tlb.idl
 
 SVG_SRCS = \
 	cdrom.svg \
diff --git a/dlls/stdole2.tlb/Makefile.in b/dlls/stdole2.tlb/Makefile.in
index 13076ece497..abd35829c5f 100644
--- a/dlls/stdole2.tlb/Makefile.in
+++ b/dlls/stdole2.tlb/Makefile.in
@@ -1,6 +1,6 @@
 MODULE    = stdole2.tlb
 
 RC_SRCS = rsrc.rc
-IDL_TLB_SRCS = std_ole_v2.idl
+IDL_SRCS = std_ole_v2.idl
 
 @MAKE_DLL_RULES@
diff --git a/dlls/stdole32.tlb/Makefile.in b/dlls/stdole32.tlb/Makefile.in
index 8cd448d79b1..3aad10b5e47 100644
--- a/dlls/stdole32.tlb/Makefile.in
+++ b/dlls/stdole32.tlb/Makefile.in
@@ -1,6 +1,6 @@
 MODULE    = stdole32.tlb
 
 RC_SRCS = rsrc.rc
-IDL_TLB_SRCS = std_ole_v1.idl
+IDL_SRCS = std_ole_v1.idl
 
 @MAKE_DLL_RULES@
diff --git a/dlls/sti/Makefile.in b/dlls/sti/Makefile.in
index 9149cf433c4..3decb9a0680 100644
--- a/dlls/sti/Makefile.in
+++ b/dlls/sti/Makefile.in
@@ -7,11 +7,7 @@ C_SRCS = \
 	sti.c \
 	sti_main.c
 
-IDL_P_SRCS = \
-	sti_wia.idl
-
-IDL_R_SRCS = \
-	sti_wia.idl
+IDL_SRCS = sti_wia.idl
 
 EXTRA_OBJS = dlldata.o
 
diff --git a/dlls/taskschd/Makefile.in b/dlls/taskschd/Makefile.in
index e9a19e62860..200ee0d8f9c 100644
--- a/dlls/taskschd/Makefile.in
+++ b/dlls/taskschd/Makefile.in
@@ -4,6 +4,6 @@ C_SRCS = \
 	task.c \
 	taskschd.c
 
-IDL_TLB_SRCS = taskschd_tlb.idl
+IDL_SRCS = taskschd_tlb.idl
 
 @MAKE_DLL_RULES@
diff --git a/dlls/urlmon/Makefile.in b/dlls/urlmon/Makefile.in
index dd6138f8546..ec2cd5cfc34 100644
--- a/dlls/urlmon/Makefile.in
+++ b/dlls/urlmon/Makefile.in
@@ -30,8 +30,7 @@ C_SRCS = \
 
 RC_SRCS = urlmon.rc
 
-IDL_P_SRCS = urlmon_urlmon.idl
-IDL_R_SRCS = urlmon_urlmon.idl
+IDL_SRCS = urlmon_urlmon.idl
 
 EXTRA_OBJS = dlldata.o
 
diff --git a/dlls/vbscript/Makefile.in b/dlls/vbscript/Makefile.in
index 381dfd13277..bbcb7787f6d 100644
--- a/dlls/vbscript/Makefile.in
+++ b/dlls/vbscript/Makefile.in
@@ -18,11 +18,10 @@ BISON_SRCS = \
 
 RC_SRCS = vbscript.rc
 
-IDL_TLB_SRCS = \
+IDL_SRCS = \
+	vbscript_classes.idl \
 	vbsglobal.idl \
 	vbsregexp10.idl \
 	vbsregexp55.idl
 
-IDL_R_SRCS = vbscript_classes.idl
-
 @MAKE_DLL_RULES@
diff --git a/dlls/vbscript/tests/Makefile.in b/dlls/vbscript/tests/Makefile.in
index 88a57f7f9d8..c42f3293c0e 100644
--- a/dlls/vbscript/tests/Makefile.in
+++ b/dlls/vbscript/tests/Makefile.in
@@ -6,8 +6,8 @@ C_SRCS = \
 	run.c \
 	vbscript.c
 
-IDL_H_SRCS = vbsregexp55.idl
-
 RC_SRCS = rsrc.rc
 
+IDL_SRCS = vbsregexp55.idl
+
 @MAKE_TEST_RULES@
diff --git a/dlls/wbemdisp/Makefile.in b/dlls/wbemdisp/Makefile.in
index dbd76d9b2f3..f9cb84934c6 100644
--- a/dlls/wbemdisp/Makefile.in
+++ b/dlls/wbemdisp/Makefile.in
@@ -5,8 +5,8 @@ C_SRCS = \
 	locator.c \
 	main.c
 
-IDL_R_SRCS = wbemdisp_classes.idl
-
-IDL_TLB_SRCS = wbemdisp_tlb.idl
+IDL_SRCS = \
+	wbemdisp_classes.idl \
+	wbemdisp_tlb.idl
 
 @MAKE_DLL_RULES@
diff --git a/dlls/wbemprox/Makefile.in b/dlls/wbemprox/Makefile.in
index 1e42d3fd0e2..003a1b61b26 100644
--- a/dlls/wbemprox/Makefile.in
+++ b/dlls/wbemprox/Makefile.in
@@ -14,7 +14,7 @@ C_SRCS = \
 	table.c \
 	wbemlocator.c
 
-IDL_R_SRCS = wbemprox.idl
+IDL_SRCS = wbemprox.idl
 
 BISON_SRCS = wql.y
 
diff --git a/dlls/wiaservc/Makefile.in b/dlls/wiaservc/Makefile.in
index 920507062c5..9f089c9ec57 100644
--- a/dlls/wiaservc/Makefile.in
+++ b/dlls/wiaservc/Makefile.in
@@ -7,7 +7,7 @@ C_SRCS = \
 	wiadevmgr.c \
 	wiaservc_main.c
 
-IDL_R_SRCS = wiaservc.idl
+IDL_SRCS = wiaservc.idl
 
 RC_SRCS = rsrc.rc
 
diff --git a/dlls/windowscodecs/Makefile.in b/dlls/windowscodecs/Makefile.in
index 78caf00653b..2456ae49b38 100644
--- a/dlls/windowscodecs/Makefile.in
+++ b/dlls/windowscodecs/Makefile.in
@@ -36,8 +36,7 @@ C_SRCS = \
 
 RC_SRCS = version.rc
 
-IDL_P_SRCS = windowscodecs_wincodec.idl
-IDL_R_SRCS = windowscodecs_wincodec.idl
+IDL_SRCS = windowscodecs_wincodec.idl
 
 EXTRA_OBJS = dlldata.o
 
diff --git a/dlls/winhttp/Makefile.in b/dlls/winhttp/Makefile.in
index 07c0484fcea..1135c96bcb7 100644
--- a/dlls/winhttp/Makefile.in
+++ b/dlls/winhttp/Makefile.in
@@ -13,7 +13,7 @@ C_SRCS = \
 	session.c \
 	url.c
 
-IDL_TLB_SRCS = winhttp_tlb.idl
+IDL_SRCS = winhttp_tlb.idl
 
 RC_SRCS = rsrc.rc
 
diff --git a/dlls/wmiutils/Makefile.in b/dlls/wmiutils/Makefile.in
index 39e21b0edfa..f3eba9bab0e 100644
--- a/dlls/wmiutils/Makefile.in
+++ b/dlls/wmiutils/Makefile.in
@@ -6,6 +6,6 @@ C_SRCS = \
 	path.c \
 	statuscode.c
 
-IDL_R_SRCS = wmiutils_classes.idl
+IDL_SRCS = wmiutils_classes.idl
 
 @MAKE_DLL_RULES@
diff --git a/dlls/wshom.ocx/Makefile.in b/dlls/wshom.ocx/Makefile.in
index 9d49bde28ea..376eba5e5f2 100644
--- a/dlls/wshom.ocx/Makefile.in
+++ b/dlls/wshom.ocx/Makefile.in
@@ -7,6 +7,6 @@ C_SRCS = \
 
 RC_SRCS = wshom.rc
 
-IDL_TLB_SRCS = wshom.idl
+IDL_SRCS = wshom.idl
 
 @MAKE_DLL_RULES@
diff --git a/dlls/wshom.ocx/tests/Makefile.in b/dlls/wshom.ocx/tests/Makefile.in
index 15800508fac..edd5d2a10a0 100644
--- a/dlls/wshom.ocx/tests/Makefile.in
+++ b/dlls/wshom.ocx/tests/Makefile.in
@@ -4,6 +4,6 @@ IMPORTS   = oleaut32 ole32
 C_SRCS = \
 	wshom.c
 
-IDL_H_SRCS = wshom.idl
+IDL_SRCS = wshom.idl
 
 @MAKE_TEST_RULES@
diff --git a/dlls/wuapi/Makefile.in b/dlls/wuapi/Makefile.in
index ca0418508b6..53f07fcc5fe 100644
--- a/dlls/wuapi/Makefile.in
+++ b/dlls/wuapi/Makefile.in
@@ -10,6 +10,6 @@ C_SRCS = \
 	systeminfo.c \
 	updates.c
 
-IDL_TLB_SRCS = wuapi_tlb.idl
+IDL_SRCS = wuapi_tlb.idl
 
 @MAKE_DLL_RULES@
diff --git a/include/Makefile.in b/include/Makefile.in
index 404c5ce5e5f..264622d571c 100644
--- a/include/Makefile.in
+++ b/include/Makefile.in
@@ -630,6 +630,7 @@ SRCDIR_INCLUDES = \
 	zmouse.h
 
 IDL_H_SRCS = $(PUBLIC_IDL_H_SRCS) $(PRIVATE_IDL_H_SRCS)
+IDL_SRCS = $(IDL_H_SRCS) $(IDL_TLB_SRCS)
 
 @MAKE_RULES@
 
diff --git a/programs/rpcss/Makefile.in b/programs/rpcss/Makefile.in
index b1d0c3f9813..371b9d2a553 100644
--- a/programs/rpcss/Makefile.in
+++ b/programs/rpcss/Makefile.in
@@ -7,7 +7,7 @@ C_SRCS = \
 	irotp.c \
 	rpcss_main.c
 
-IDL_S_SRCS = \
+IDL_SRCS = \
 	epm.idl \
 	irot.idl
 
diff --git a/programs/services/Makefile.in b/programs/services/Makefile.in
index 645f26d82b3..8f294dfe73f 100644
--- a/programs/services/Makefile.in
+++ b/programs/services/Makefile.in
@@ -7,6 +7,6 @@ C_SRCS = \
 	services.c \
 	utils.c
 
-IDL_S_SRCS = svcctl.idl
+IDL_SRCS = svcctl.idl
 
 @MAKE_PROG_RULES@
diff --git a/programs/wscript/Makefile.in b/programs/wscript/Makefile.in
index 2e85e3526e7..c12bd448774 100644
--- a/programs/wscript/Makefile.in
+++ b/programs/wscript/Makefile.in
@@ -10,6 +10,6 @@ C_SRCS = \
 	host.c \
 	main.c
 
-IDL_TLB_SRCS = ihost.idl
+IDL_SRCS = ihost.idl
 
 @MAKE_PROG_RULES@
diff --git a/tools/make_makefiles b/tools/make_makefiles
index ef26aafb98b..22d66b59a89 100755
--- a/tools/make_makefiles
+++ b/tools/make_makefiles
@@ -276,7 +276,7 @@ sub parse_makefile($)
             ${$make{"=flags"}}{"implib"} = 1 if $var eq "IMPORTLIB";
             next;
         }
-        if (/^\s*(BISON_SRCS|LEX_SRCS|IDL_[CHIPRS]_SRCS|IDL_TLB_SRCS|IMPLIB_SRCS|C_SRCS|OBJC_SRCS|MC_SRCS|RC_SRCS|SVG_SRCS|FONT_SRCS|IN_SRCS|PROGRAMS|MANPAGES)\s*=\s*(.*)/)
+        if (/^\s*(BISON_SRCS|LEX_SRCS|IDL_SRCS|IMPLIB_SRCS|C_SRCS|OBJC_SRCS|MC_SRCS|RC_SRCS|SVG_SRCS|FONT_SRCS|IN_SRCS|PROGRAMS|MANPAGES)\s*=\s*(.*)/)
         {
             my $var = $1;
             my @list = split(/\s+/, $2);
@@ -432,14 +432,7 @@ sub assign_sources_to_makefiles(@)
             }
             elsif ($name =~ /\.idl$/)
             {
-                my %flags = get_makedep_flags( $file );
-                push @{${$make}{"=IDL_C_SRCS"}}, $name if defined $flags{"client"};
-                push @{${$make}{"=IDL_H_SRCS"}}, $name if defined $flags{"header"} || !(keys %flags);
-                push @{${$make}{"=IDL_I_SRCS"}}, $name if defined $flags{"ident"};
-                push @{${$make}{"=IDL_P_SRCS"}}, $name if defined $flags{"proxy"};
-                push @{${$make}{"=IDL_R_SRCS"}}, $name if defined $flags{"register"};
-                push @{${$make}{"=IDL_S_SRCS"}}, $name if defined $flags{"server"};
-                push @{${$make}{"=IDL_TLB_SRCS"}}, $name if defined $flags{"typelib"};
+                push @{${$make}{"=IDL_SRCS"}}, $name;
                 ${${$make}{"=flags"}}{"clean"} = 1;
             }
             elsif ($name =~ /\.man\.in$/)
@@ -459,7 +452,7 @@ sub assign_sources_to_makefiles(@)
     unshift @{${$make}{"=SRCDIR_INCLUDES"}}, "\$(XTEMPLATE_SRCS)";
     unshift @{${$make}{"=SRCDIR_INCLUDES"}}, "\$(PUBLIC_IDL_H_SRCS)";
     unshift @{${$make}{"=SRCDIR_INCLUDES"}}, "\$(IDL_TLB_SRCS)";
-    unshift @{${$make}{"=IDL_H_SRCS"}}, "\$(PUBLIC_IDL_H_SRCS) \$(PRIVATE_IDL_H_SRCS)";
+    unshift @{${$make}{"=IDL_SRCS"}}, "\$(IDL_H_SRCS) \$(IDL_TLB_SRCS)";
 
     # preserve shared source files from the parent makefile
     foreach my $file (@makefiles)
@@ -568,20 +561,16 @@ sub update_makefiles(@)
         replace_makefile_variable( $file, "C_SRCS" );
         replace_makefile_variable( $file, "OBJC_SRCS" );
         replace_makefile_variable( $file, "RC_SRCS" );
-        replace_makefile_variable( $file, "PRIVATE_IDL_H_SRCS" );
-        replace_makefile_variable( $file, "PUBLIC_IDL_H_SRCS" );
-        replace_makefile_variable( $file, "IDL_C_SRCS" );
-        replace_makefile_variable( $file, "IDL_H_SRCS" );
-        replace_makefile_variable( $file, "IDL_I_SRCS" );
-        replace_makefile_variable( $file, "IDL_P_SRCS" );
-        replace_makefile_variable( $file, "IDL_R_SRCS" );
-        replace_makefile_variable( $file, "IDL_S_SRCS" );
-        replace_makefile_variable( $file, "IDL_TLB_SRCS" );
+        replace_makefile_variable( $file, "IDL_SRCS" );
         replace_makefile_variable( $file, "XTEMPLATE_SRCS" );
         replace_makefile_variable( $file, "IN_SRCS" );
         replace_makefile_variable( $file, "IMPLIB_SRCS" );
-        replace_makefile_variable( $file, "SRCDIR_INCLUDES" );
         replace_makefile_variable( $file, "MANPAGES" );
+        next unless $file eq "include/Makefile";
+        replace_makefile_variable( $file, "PRIVATE_IDL_H_SRCS" );
+        replace_makefile_variable( $file, "PUBLIC_IDL_H_SRCS" );
+        replace_makefile_variable( $file, "IDL_TLB_SRCS" );
+        replace_makefile_variable( $file, "SRCDIR_INCLUDES" );
     }
 
     push @lines, "dnl End of auto-generated output commands\n";
diff --git a/tools/makedep.c b/tools/makedep.c
index 136b5cef9ed..e113cf92cd2 100644
--- a/tools/makedep.c
+++ b/tools/makedep.c
@@ -2050,13 +2050,7 @@ static void update_makefile( const char *path )
         "OBJC_SRCS",
         "RC_SRCS",
         "MC_SRCS",
-        "IDL_H_SRCS",
-        "IDL_C_SRCS",
-        "IDL_I_SRCS",
-        "IDL_P_SRCS",
-        "IDL_S_SRCS",
-        "IDL_R_SRCS",
-        "IDL_TLB_SRCS",
+        "IDL_SRCS",
         "BISON_SRCS",
         "LEX_SRCS",
         "XTEMPLATE_SRCS",