Allow vpath builds and regression tests to succeed on Mingw. Backpatch to...

Allow vpath builds and regression tests to succeed on Mingw. Backpatch to release 8.4 - earlier releases would require more changes and it's not worth the trouble.

src/bin/pgevent/Makefile

@@ -27,7 +27,7 @@ pgevent.dll: pgevent.def $(OBJS)
 	$(DLLWRAP) --def $< -o $(NAME) $(OBJS)
 
 pgmsgevent.o: pgmsgevent.rc win32ver.rc
-	$(WINDRES) $< -o $@ --include-dir=$(top_builddir)/src/include --include-dir=$(top_srcdir)/src/include --include-dir=$(srcdir)
+	$(WINDRES) $< -o $@ --include-dir=$(top_builddir)/src/include --include-dir=$(top_srcdir)/src/include --include-dir=$(srcdir) --include-dir=.
 
 all-lib: $(NAME)
 

src/interfaces/ecpg/test/Makefile

@@ -28,7 +28,7 @@ endif
 ifneq ($(build_os),mingw32)
 abs_builddir := $(shell pwd)
 else
-abs_builddir := $(shell pwd -W)
+abs_builddir := $(shell sh -c "pwd -W")
 endif
 
 all install installdirs uninstall distprep:
@@ -73,7 +73,7 @@ $(top_builddir)/src/port/pg_config_paths.h: $(top_builddir)/src/Makefile.global
 # $(srcdir) to the build directory.
 
 ifdef VPATH
-remaining_files_src := $(wildcard $(srcdir)/*/*.pgc) $(wildcard $(srcdir)/expected/*.c) $(wildcard $(srcdir)/expected/*.stdout) $(wildcard $(srcdir)/expected/*.stderr)
+remaining_files_src := $(wildcard $(srcdir)/*/*.pgc) $(wildcard $(srcdir)/expected/*.c) $(wildcard $(srcdir)/expected/*.stdout) $(wildcard $(srcdir)/expected/*.stderr) $(srcdir)/resultmap
 remaining_files_build := $(patsubst $(srcdir)/%, $(abs_builddir)/%, $(remaining_files_src))
 
 all: $(remaining_files_build)