Jan Lindemann
f05e1ee0e3
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.Signed-off-by: Jan Lindemann <jan@janware.com>
39 lines
1.1 KiB
Makefile
39 lines
1.1 KiB
Makefile
# ----- define these variables
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# CACHED_FILES = $(TOPDIR)/VERSION
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# CACHED_VARS = VERSION
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.PHONY: cache clean-cache clean-cache-projects
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CACHE_PROJECT_MK ?= .cache-project.mk
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CACHE_PROJECTS_MK ?= .cache-projects.mk
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CACHE_FILES_MK = $(CACHE_PROJECT_MK) $(CACHE_PROJECTS_MK)
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CACHED_VARS_ONLY_PROJECT ?= \
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PROJECT \
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PREREQ \
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VERSION \
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HEX_VERSION \
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FULL_NAME \
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JW_PKG_LD_LIBRARY_PATH \
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JW_PKG_EXE_PATH \
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JW_PKG_PYTHON_PATH
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all: cache
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clean: clean-cache
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clean-cache:
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rm -f $(CACHE_PROJECT_MK)
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cache: $(CACHE_PROJECT_MK)
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$(CACHE_PROJECT_MK): $(CACHED_FILES) $(JWBDIR)/make/cache.mk
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@echo $(foreach v,$(CACHED_VARS),$v = $(value $(v))EOL) | \
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$(SED) 's/EOL */\n/g;' | \
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$(SED) 's|$(realpath $(TOPDIR))|$$(TOPDIR)|g' | \
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$(SED) 's|$(realpath $(PROJECTS_DIR))|$$(PROJECTS_DIR)|g' | \
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$(GREP) . | \
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tee $@.tmp
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mv $@.tmp $@
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# -- Only used in jw-pkg
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cache-projects: $(CACHE_PROJECTS_MK)
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clean-cache-projects:
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rm -f $(CACHE_PROJECTS_MK)
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$(CACHE_PROJECTS_MK): $(CACHE_PROJECT_MK)
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sed '/\($(subst $(space),\|,$(CACHED_VARS_ONLY_PROJECT))\)\s*[:?]\?=/ d' $< > $@.tmp
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mv $@.tmp $@
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