Enable -preview=dtorfields for druntime

Author: MoonlightSentinel

posix.mak

@@ -79,7 +79,7 @@ ifeq (solaris,$(OS))
 endif
 
 # Set DFLAGS
-UDFLAGS:=-conf= -Isrc -Iimport -w -de -dip1000 -preview=fieldwise $(MODEL_FLAG) $(PIC) $(OPTIONAL_COVERAGE)
+UDFLAGS:=-conf= -Isrc -Iimport -w -de -dip1000 -preview=fieldwise $(MODEL_FLAG) $(PIC) $(OPTIONAL_COVERAGE) -preview=dtorfields
 ifeq ($(BUILD),debug)
 	UDFLAGS += -g -debug
 	DFLAGS:=$(UDFLAGS)

win32.mak

@@ -14,7 +14,7 @@ HOST_DMD=dmd
 DOCDIR=doc
 IMPDIR=import
 
-DFLAGS=-m$(MODEL) -conf= -O -release -dip1000 -preview=fieldwise -inline -w -Isrc -Iimport
+DFLAGS=-m$(MODEL) -conf= -O -release -dip1000 -preview=fieldwise -preview=dtorfields -inline -w -Isrc -Iimport
 UDFLAGS=-m$(MODEL) -conf= -O -release -dip1000 -preview=fieldwise -w -Isrc -Iimport
 DDOCFLAGS=-conf= -c -w -o- -Isrc -Iimport -version=CoreDdoc
 

win64.mak

@@ -21,7 +21,7 @@ IMPDIR=import
 MAKE=make
 HOST_DMD=dmd
 
-DFLAGS=-m$(MODEL) -conf= -O -release -dip1000 -preview=fieldwise -inline -w -Isrc -Iimport
+DFLAGS=-m$(MODEL) -conf= -O -release -dip1000 -preview=fieldwise -preview=dtorfields -inline -w -Isrc -Iimport
 UDFLAGS=-m$(MODEL) -conf= -O -release -dip1000 -preview=fieldwise -w -version=_MSC_VER_$(_MSC_VER) -Isrc -Iimport
 DDOCFLAGS=-conf= -c -w -o- -Isrc -Iimport -version=CoreDdoc