janware/jw-pkg
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cache.mk: Don't overwrite defined variables

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Check with ifndef if a variable is defined before hard defining it in cache.mk. This gives more flexibility when overriding variables with local.mk.
Signed-off-by: Jan Lindemann <jan@janware.com>
This commit is contained in:
Jan Lindemann 2026-05-05 16:54:18 +02:00
commit 262be57741
Signed by: Jan Lindemann
GPG key ID: 3750640C9E25DD61
1 changed files with 3 additions and 2 deletions
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5
make/cache.mk
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@ -20,8 +20,9 @@ clean-cache:
cache: $(CACHE_PROJECT_MK)
$(CACHE_PROJECT_MK): $(CACHED_FILES) $(JWBDIR)/make/cache.mk
@echo $(foreach v,$(CACHED_VARS),$v = $(value $(v))EOL) | \
$(SED) 's/EOL */\n/g;' | \
@echo $(foreach v,$(CACHED_VARS),$v = $(value $(v)) EOL) | \
$(SED) 's/\s\+EOL/\n/g;' | \
$(SED) 's/\s*\(\S\+\)\s*=\s*\(.*\)\s*/ifndef \1\n \1 = \2\nendif\n/g;' | \
$(SED) 's|$(realpath $(TOPDIR))|$$(TOPDIR)|g' | \
$(SED) 's|$(realpath $(PROJECTS_DIR))|$$(PROJECTS_DIR)|g' | \
$(GREP) . | \