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support/dependencies: avoid spurious warning on print-vars

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When calling 'printvars', the 'suitable-host-package' macro is printed
(a macro is just a variable like the others, after all, just with some
parameters). Because it is printed as a variable, it is missing its
parameters, but it still tries to evaluate the $(shell) construct.

This causes spurious warning:

    make[1]: support/dependencies/check-host-.sh: Command not found

Only try and call the script if there is actually a tool to check for.

Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
(cherry picked from commit 77304e5143)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
This commit is contained in:
Yann E. MORIN 2021-11-13 14:28:14 +01:00 committed by Peter Korsgaard
parent abf7c453d8
commit 138328309d
1 changed files with 1 additions and 1 deletions
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2
support/dependencies/dependencies.mk
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@ -15,7 +15,7 @@ else
# script should use 'which' to find a candidate. The script should return
# the path to the suitable host tool, or nothing if no suitable tool was found.
define suitable-host-package
$(shell support/dependencies/check-host-$(1).sh $(2))
$(if $(1),$(shell support/dependencies/check-host-$(1).sh $(2)))
endef
endif
# host utilities needs host-tar to extract the source code tarballs, so