i'm sure i will be embarrassed when i learn how simple the answer is
to this but here's a snippet of a makefile i'm dealing with:
===== start snippet =====
TOOL_SRC_DIR := $(LOCAL_DIR)/$(PETALINUX_VERSION)
PETA_ARCHIVE := $(LOCAL_DIR)/$(PETALINUX_VERSION).tar.gz
PETA_SRC_CFG_FILE := $(TOOL_SRC_DIR)/linux/settings.sh
# Runtime build variables
TOOL_DIR := $(REPO_ROOT)
PETA_CFG_FILE := $(TOOL_DIR)/linux/settings.sh
PETA_CFG := source $(PETA_CFG_FILE)
prep := $(PROJECT_STAGE_DIR) $(PROJECT_OUTPUT_DIR)
$(TOOL_SRC_DIR):
$(info docker building rules: $@)
mkdir -p $@
$(PETA_ARCHIVE): | $(TOOL_SRC_DIR)
$(info docker building rules: $@)
curl -v -o $@ -O
"$(BASE_URL)/generic-local/$(PETALINUX_ARCHIVE_NAME)/${PETALINUX_VERSION}.tar.gz";
$(PETA_SRC_CFG_FILE): | $(PETA_ARCHIVE)
$(info docker building rules: $@)
tar -xf $(PETA_ARCHIVE) -C $(LOCAL_DIR)/$(PETALINUX_VERSION)
===== end snippet =====
long story short, the above has a target of ${PETA_ARCHIVE), which
is the name of a sizable (7G) petalinux tarball that make expects to
find under the top-level local/ directory. if i git clone this
project, then manually create local/ and "cp" that tarball into
local/, make deems that rule satisfied, and proceeds to untar the
tarball without downloading it.
if, however, i would rather create a symlink under local/ to the
tarball to avoid all that copying, make insists on downloading it
anyway.
so, in summary, can a target be a symlink and, if so, how? thank you
kindly.
rday
--
========================================================================
Robert P. J. Day Ottawa, Ontario, CANADA
http://crashcourse.ca
Twitter: http://twitter.com/rpjday
LinkedIn: http://ca.linkedin.com/in/rpjday
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