Contrib: prefix widl tool

contrib/src/d3d11/rules.mak

@@ -20,10 +20,10 @@ $(TARBALLS)/dxgidebug.idl:
 	(cd $(TARBALLS) && patch -fp1) < $(SRC)/d3d11/dxgidebug.patch
 
 $(DST_D3D11_H): $(TARBALLS)/d3d11.idl
-	widl -DBOOL=WINBOOL -I$(IDL_INC_PATH) -h -o $@ $<
+	$(WIDL) -DBOOL=WINBOOL -I$(IDL_INC_PATH) -h -o $@ $<
 
 $(DST_DXGIDEBUG_H): $(TARBALLS)/dxgidebug.idl
-	widl -DBOOL=WINBOOL -I$(IDL_INC_PATH) -h -o $@ $<
+	$(WIDL) -DBOOL=WINBOOL -I$(IDL_INC_PATH) -h -o $@ $<
 
 .d3d11: $(DST_D3D11_H) $(DST_DXGIDEBUG_H)
 	touch $@

contrib/src/main.mak

@@ -69,6 +69,9 @@ endif
 ifneq ($(findstring $(origin STRIP),undefined default),)
 STRIP := strip
 endif
+ifneq ($(findstring $(origin WIDL),undefined default),)
+WIDL := widl
+endif
 else
 ifneq ($(findstring $(origin CC),undefined default),)
 CC := $(HOST)-gcc
@@ -88,6 +91,9 @@ endif
 ifneq ($(findstring $(origin STRIP),undefined default),)
 STRIP := $(HOST)-strip
 endif
+ifneq ($(findstring $(origin WIDL),undefined default),)
+WIDL := $(HOST)-widl
+endif
 endif
 
 ifdef HAVE_ANDROID