Revert "build: Calculate dependencies at same time as compiling."

This reverts commit 0931067dc5549c443e144d599683b53220021f44.

The dep files should be in the build dir, which is not necc. the src dir.

Easy to fix, but reverting for now until I have time to revisit.

make.tmpl.in

@@ -442,14 +442,12 @@ endif
 
 .LIBPATTERNS = lib%.so lib%.a
 
-DEPFLAGS=-MT $@ -MMD -MP -MF $*.d
-
 # still needed in 2018 for 32bit builds
 DEFS+=-D_FILE_OFFSET_BITS=64
 
 %.o: %.c
 	@echo "    [CC] $<"
-	$(Q) $(CC) $(DEPFLAGS) -c $(INCLUDES) $(VALGRIND_CFLAGS) $(PROGS_CFLAGS) $(DEFS) $(DEFS_$@) $(WFLAGS) $(WCFLAGS) $(CFLAGS) $(CFLAGS_$@) $< -o $@
+	$(Q) $(CC) -c $(INCLUDES) $(VALGRIND_CFLAGS) $(PROGS_CFLAGS) $(DEFS) $(DEFS_$@) $(WFLAGS) $(WCFLAGS) $(CFLAGS) $(CFLAGS_$@) $< -o $@
 
 %.o: %.cpp
 	@echo "    [CXX] $<"
@@ -509,8 +507,17 @@ $(LIB_STATIC): $(OBJECTS)
 	$(Q) $(RM) $@
 	$(Q) $(AR) rsv $@ $(OBJECTS) > /dev/null
 
-%.d: $(INC_LNS)
-.PRECIOUS: %.d
+%.d: %.c $(INC_LNS)
+	@echo "    [DEP] $<"
+	$(Q) $(MKDIR_P) $(dir $@); \
+	set -e; \
+	FILE=`echo $@ | sed 's/\\//\\\\\\//g;s/\\.d//g'`; \
+	DEPS=`echo $(DEPS) | sed -e 's/\\//\\\\\\//g'`; \
+	$(CC) -MM $(INCLUDES) $(VALGRIND_CFLAGS) $(PROGS_CFLAGS) $(DEFS) -o $@ $<; \
+	sed -i "s/\(.*\)\.o[ :]*/$$FILE.o $$FILE.d $$FILE.pot: $$DEPS /g" $@; \
+	DEPLIST=`sed 's/ \\\\//;s/.*://;' < $@`; \
+	echo $$DEPLIST | fmt -1 | sed 's/ //g;s/\(.*\)/\1:/' >> $@; \
+	[ -s $@ ] || $(RM) $@
 
 %.mo: %.po
 	@echo "    [MSGFMT] $<"