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epcim/Makefile-vars.md

Created March 30, 2023 11:08
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makefile vars from env
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Makefile-vars.md

scenarios: TMPDIR=new/path make and make TMPDIR=new/path

SHELL  := env TMPDIR=$(TMPDIR) $(SHELL)
TMPDIR ?= "/tmp"

all:
  @echo $(TMPDIR)

TMPDIR := "/tmp"

ifdef $$TMPDIR
TMPDIR := $$TMPDIR
endif

test:
    echo $(TMPDIR)
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