Rename CFLAGS and friends to follow the conventions of the implicit rules defined by GNU Make:
- $(CPPFLAGS) is passed to both C++ and C compiler - $(CXXFLAGS) is passed to C++ compiler only - $(CFLAGS) is passed to C compiler only - C++ compiler is in $(CXX)
This commit makes it possible to successfully run "make all" against ytools' again, with TARGET_TUPLE set to i686-ms-w64-mingw. Lots of minor and major tweaks here and there.
The biggest diff is a move of the architecture-related definitions into platform.mk. The are needed pretty early on, so that seems reasonable.
Making this work again is part of the larger effort to support cross buildchains in a more concise way, i.e. without so many if ($(TARGET),mingw)) all over the place. TARGET's relevance should dwindle, until it's finally taken over by the TARGET_XXX variables extracted from TARGET_TUPLE or TARGET_TRIPLET.
This commit tries to remove the necessity to call projects.py from $(TOPDIR) to speed up recursive builds over all projects yet again. This is a major undertaking. There are two variables which are filled py projects.py in $(TOPDIR): PREREQ and PREREQ_DIRS. Sadly, the latter is a path relative to $(TOPDIR)/make, so this is kind of pointless. Unless the cache is maintained in $(TOPDIR), a thing I tried to avoid. So this commit is only able to cache $(PREREQ), not $(PREREQ_DIRS), which still is a hassle. Introduced defs-dirs.mk for that, to make it accessible to make.mk, and modified all the other parts of the machinery, too.
This commit sees several improvements to the build performance:
- Introduce cache.mk, which creates makefiles caching often used variables, per tree and per project. - Define more variables with := enclosed in condistions, instead of defining them with ?=, because the RHS of ?= is expanded deferredly. - Add more definitions for executables. - Move some more specialized definitions out into specialized makefiles, notably htdocs.mk and tmpl.mk
