This commit aims at improving speed by using better caching.
- Makefile, cache.mk: Split .cache.mk up
To allow caching of runtime path variables which are
project-specific, split .cache.mk up in .cache-project.mk and
.cache-projects.mk
- ldlibpath.mk: Cache ldlibpath, exepath and pythonpath
Place the output of $(call proj_query ldlibpath), $(call
proj_query, exepath) and $(call proj_query pythonpath) in
JW_PKG_LD_LIBRARY_PATH, JW_PKG_EXE_PATH, and JW_PKG_PYTHON_PATH
respectively, and cache the variables in make/.project-cache.mk.
- cache.mk: Use = instead of :=
Recursively expanded variables are nearly as fast as := variables
if the assigned value is a fixed string. And sometimes it's not,
rightly so, because variables get assigned below, as with
JW_PKG_XXX for instance.
- cache.mk: Use $(TOPDIR) as variable values
Replace absolute references to project's topdir by $(TOPDIR) with
sed. As soon as the project queries produce absolute paths, they
will be transformed into relative paths which allow the code base
to be moved to a different location and still remain functional
without a rebuild.
Implement the functionality of create-pkg-config.sh in a Python module CmdCreatePkgConfig.py. This allows to remove create-pkg-config.sh and jw-build-functions.sh.
Note that the translation was done pretty literally to play it safe. More code can and should be removed by taking advantage of the fact that jw-projects.py knows more about the project than the shell scripts.
CC, LD and CXX are builtin, and they also override ?=, so ?= is pointless.
This solution disallows specifying a compiler from the environment. There should be some solution with $(origin CC), but this seems too clunky for now.
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
