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build: De-duplicate _DIRS before calling mkdir

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If the build path is long, the contents of the _DIRS variable can be
very long, since it repeats the same directories very often. In some
cases, this has triggered an "Argument list too long" build error.

Reported-by: Robert Marko <robimarko@gmail.com>
Suggested-by: Eneas U de Queiroz <cotequeiroz@gmail.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
This commit is contained in:
Felix Fietkau 2024-04-04 15:03:27 +02:00 committed by Jouni Malinen
parent 9a44236452
commit 4b755c9672
1 changed files with 1 additions and 1 deletions
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2
src/build.rules
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@ -80,7 +80,7 @@ endif
_DIRS := $(BUILDDIR)/$(PROJ) _DIRS := $(BUILDDIR)/$(PROJ)
.PHONY: _make_dirs .PHONY: _make_dirs
_make_dirs: _make_dirs:
@mkdir -p $(_DIRS) @mkdir -p $(sort $(_DIRS))
$(BUILDDIR)/$(PROJ)/src/%.o: $(ROOTDIR)src/%.c $(CONFIG_FILE) | _make_dirs $(BUILDDIR)/$(PROJ)/src/%.o: $(ROOTDIR)src/%.c $(CONFIG_FILE) | _make_dirs
$(Q)$(CC) -c -o $@ $(CFLAGS) $< $(Q)$(CC) -c -o $@ $(CFLAGS) $<