58 lines
1.7 KiB
Makefile
58 lines
1.7 KiB
Makefile
#
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# \brief Environment for content.mk files when determining missing ports
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# \author Martin Stein
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# \date 2019-05-12
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#
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# GENODE_DIR - root directory of the Genode source tree
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# CONTRIB_DIR - directory for 3rd-party code
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# CONTENT_MK - content.mk file to process
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# REP_DIR - repository directory of the content.mk file
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# MISSING_PORTS_FILE - file to write the names of missing ports to
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# VERBOSE - verbosity
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#
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#
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# Functions for disabling and re-enabling evaluation of $(shell ...)
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#
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ORIGINAL_SHELL := $(SHELL)
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enable_shell = $(eval SHELL:=$(ORIGINAL_SHELL))
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disable_shell = $(eval SHELL:=true)
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#
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# Disable shell calls so the content.mk file will not evaluate something like
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# $(shell find $(PORT_DIR) ...) while 'PORT_DIR' is empty because we have
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# overridden the port_dir function.
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#
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$(disable_shell)
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#
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# If a port is missing, append its name to the missing ports file
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#
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_assert = $(if $1,$1,$(shell echo $2 >> $(MISSING_PORTS_FILE)))
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#
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# Utility to query the port directory for a given path to a port description.
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#
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# Example:
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#
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# $(call port_dir,$(GENODE_DIR)/repos/libports/ports/libpng)
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#
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_port_hash = $(shell cat $(call _assert,$(wildcard $1.hash),$(notdir $1)))
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_port_dir = $(wildcard $(CONTRIB_DIR)/$(notdir $1)-$(call _port_hash,$1))
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port_dir = $(call enable_shell)$(call _assert,$(call _port_dir,$1),$(notdir $1))$(call disable_shell)
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#
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# Prevent the evaluation of mirror_from_rep_dir in content.mk
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#
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mirror_from_rep_dir = $(error mirror_from_rep_dir called outside of target)
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#
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# Prevent the evaluation of the first target in the content.mk file
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#
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prevent_execution_of_content_targets:
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#
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# Include the content.mk file to evaluate all calls to the port_dir function
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#
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include $(CONTENT_MK)
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