build: Improve win32 build system

Handle cross-directory dependencies using PHONY targets and clean up
some redundancies.

Makefile.win32

@@ -3,23 +3,23 @@ default: all
 top_srcdir = .
 include $(top_srcdir)/Makefile.win32.common
 
-# Recursive targets
-pixman_r:
+all: pixman test
+
+pixman:
 	@$(MAKE) -C pixman -f Makefile.win32
 
-test_r:
+test:
 	@$(MAKE) -C test -f Makefile.win32
 
 clean_r:
 	@$(MAKE) -C pixman -f Makefile.win32 clean
 	@$(MAKE) -C test   -f Makefile.win32 clean
 
-check_r:
+check:
 	@$(MAKE) -C test -f Makefile.win32 check
 
-# Base targets
-all: test_r
 
 clean: clean_r
 
-check: check_r
+
+.PHONY: all pixman test clean check

Makefile.win32.common

@@ -46,9 +46,11 @@ endif
 endif
 
 
-$(CFG_VAR)/%.obj: %.c $(BUILT_SOURCES)
+$(CFG_VAR)/%.obj: %.c $(libpixman_headers)
 	@mkdir -p $(CFG_VAR)
 	@$(CC) -c $(PIXMAN_CFLAGS) -Fo"$@" $<
 
 clean: inform
 	@$(RM) $(CFG_VAR)/*.{exe,ilk,lib,obj,pdb} $(BUILT_SOURCES) || exit 0
+
+.PHONY: inform clean

pixman/Makefile.win32

@@ -64,3 +64,5 @@ endif
 # pixman linking
 $(CFG_VAR)/$(LIBRARY).lib: $(OBJECTS)
 	@$(AR) $(PIXMAN_ARFLAGS) -OUT:$@ $^
+
+.PHONY: all informMMX informSSE2

test/Makefile.win32

@@ -16,9 +16,9 @@ OBJECTS = $(patsubst %.c, $(CFG_VAR)/%.obj, $(SOURCES))
 TESTS   = $(patsubst %,   $(CFG_VAR)/%.exe, $(TESTPROGRAMS))
 BENCHS  = $(patsubst %,   $(CFG_VAR)/%.exe, $(BENCHMARKS))
 
-all: inform $(TESTS) $(BENCHS)
+all: pixman inform $(TESTS) $(BENCHS)
 
-check: inform $(TESTS)
+check: pixman inform $(TESTS)
 	@failures=0 ; \
 	total=0 ; \
 	for test in $(TESTS) ; \
@@ -46,5 +46,9 @@ $(CFG_VAR)/libutils.lib: $(libutils_OBJECTS)
 $(CFG_VAR)/%.exe: $(CFG_VAR)/%.obj $(TEST_LDADD)
 	@$(LD) $(PIXMAN_LDFLAGS) -OUT:$@ $^
 
-$(top_builddir)/pixman/$(CFG_VAR)/$(LIBRARY).lib:
+$(top_builddir)/pixman/$(CFG_VAR)/$(LIBRARY).lib: pixman
+
+pixman:
 	@$(MAKE) -C $(top_builddir)/pixman -f Makefile.win32
+
+.PHONY: all check pixman