NetCube-Systems-Austria/kumquat-buildroot
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legal info: fix saving of host package licenses

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Due to some tricky make behavior, the license texts of host packages that
did not provide an explicit HOST_FOO_LICENSE_FILES definition was not saved.
The problem is that it is not straightforward to use a variable
defined/updated inside an evaluated block as input to a foreach statement.
If you try to use $(FOO) then only the original value of FOO is used for
foreach, any update inside the block is ignored. However, if you use
$$(FOO), the entire contents of FOO (typically a list of items) is passed
as one item to foreach, thus causing just one iteration instead of several.

>From Arnout Vandecapelle's explanation:
Any variable referenced with a single $ inside the inner-generic-package
macro is expanded before the resulting contents are eval'ed. Therefore, it
is not possible to refer to variables defined by the inner-generic-package
macro from within a single-$ function call.

To fix the problem, one should defer the evaluation of the entire block
using double dollar signs.

Additionally, a few empty lines have been added to the legal-info-foo block
for clarity.

Signed-off-by: Thomas De Schampheleire <thomas.de.schampheleire@gmail.com>
Acked-by: Luca Ceresoli <luca@lucaceresoli.net>
Tested-by: Luca Ceresoli <luca@lucaceresoli.net>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
This commit is contained in:
Thomas De Schampheleire 2013-11-12 09:47:56 +01:00 committed by Peter Korsgaard
parent 7a7ec2dd37
commit 003d38da3a
1 changed files with 13 additions and 4 deletions
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17
package/pkg-generic.mk
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@ -502,26 +502,35 @@ $(2)_MANIFEST_TARBALL ?= not saved
$(1)-legal-info:
# Packages without a source are assumed to be part of Buildroot, skip them.
ifneq ($(call qstrip,$$($(2)_SOURCE)),)
ifeq ($$($(2)_SITE_METHOD),local)
# Packages without a tarball: don't save and warn
@$(call legal-warning-pkg-savednothing,$$($(2)_RAWNAME),local)
else ifneq ($$($(2)_OVERRIDE_SRCDIR),)
@$(call legal-warning-pkg-savednothing,$$($(2)_RAWNAME),override)
else
# Other packages
# Save license files if defined
ifeq ($(call qstrip,$$($(2)_LICENSE_FILES)),)
@$(call legal-license-nofiles,$$($(2)_RAWNAME))
@$(call legal-warning-pkg,$$($(2)_RAWNAME),cannot save license ($(2)_LICENSE_FILES not defined))
else
@$(foreach F,$($(2)_LICENSE_FILES),$(call legal-license-file,$$($(2)_RAWNAME),$(F),$$($(2)_DIR)/$(F))$$(sep))
endif
# Double dollar signs are really needed here, to catch host packages
# without explicit HOST_FOO_LICENSE_FILES assignment, also in case they
# have multiple license files.
@$$(foreach F,$$($(2)_LICENSE_FILES),$$(call legal-license-file,$$($(2)_RAWNAME),$$(F),$$($(2)_DIR)/$$(F))$$(sep))
endif # license files
ifeq ($$($(2)_REDISTRIBUTE),YES)
# Copy the source tarball (just hardlink if possible)
@cp -l $(DL_DIR)/$$($(2)_SOURCE) $(REDIST_SOURCES_DIR) 2>/dev/null || \
cp $(DL_DIR)/$$($(2)_SOURCE) $(REDIST_SOURCES_DIR)
endif
endif
endif # redistribute
endif # other packages
@$(call legal-manifest,$$($(2)_RAWNAME),$$($(2)_VERSION),$$($(2)_LICENSE),$$($(2)_MANIFEST_LICENSE_FILES),$$($(2)_MANIFEST_TARBALL))
endif # ifneq ($(call qstrip,$$($(2)_SOURCE)),)
$(foreach hook,$($(2)_POST_LEGAL_INFO_HOOKS),$(call $(hook))$(sep))