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authorGravatar Yann E. MORIN <yann.morin.1998@free.fr>2015-07-22 16:58:52 +0200
committerGravatar Thomas Petazzoni <thomas.petazzoni@free-electrons.com>2015-07-22 17:25:11 +0200
commit273031ca02459efa430bf2b8ff3ca0dd9232d99a (patch)
tree061da389ec4fd8f27118afe42fc13cb379cd4cf6 /package/pkg-kconfig.mk
parent76a964be7192601f1f2b356ae322b5d0891a3ef9 (diff)
downloadbuildroot-273031ca02459efa430bf2b8ff3ca0dd9232d99a.tar.gz
buildroot-273031ca02459efa430bf2b8ff3ca0dd9232d99a.tar.bz2
core/pkg-kconfig: do not override @D
Currently, we override @D for the kconfig configurators, so the fixup commands can use $(@D); otherwise @D would be simply '.' because it is not a real file in the package build dir. However, this breaks the soon-to-be-introduced linux-backports package, which needs to have a dependency on the linux package to be configured. The underlying reason is that @D is an automatic variable that is always set by make to the directory part of the target of the rule. However, automatic variables loose their "automatic" property when they are manually set. Furthermore, a variable that is defined for a rule is inherited by all dependencies of that rule, so our manually-set @D is inherited all the way down the dependency chain of linux-backports, down to the linux' own .config rule, which is thus run with @D pointing to linux-backports' build dir, not linux'. Fix that by using a "static pattern rule", redirecting the configurators to an intermediate stamp-like file which path is in the package build dir, so we get a valid @D from the onset, without having to manually fiddle with it. Thanks to Arnout for suggesting that in the first place. Sorry I did reject it as "too complex" when it was in fact the best solution. Suggested-by: Arnout Vandecappelle <arnout@mind.be> Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr> Cc: Arnout Vandecappelle <arnout@mind.be> Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Cc: Thomas De Schampheleire <patrickdepinguin@gmail.com> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Diffstat (limited to 'package/pkg-kconfig.mk')
-rw-r--r--package/pkg-kconfig.mk16
1 files changed, 9 insertions, 7 deletions
diff --git a/package/pkg-kconfig.mk b/package/pkg-kconfig.mk
index 3e17a7003e..375607faf9 100644
--- a/package/pkg-kconfig.mk
+++ b/package/pkg-kconfig.mk
@@ -104,15 +104,16 @@ endif
# that is clean wrt. our requirements.
#
# Because commands in $(1)_FIXUP_KCONFIG are probably using $(@D), we
-# fake it for the configurators (otherwise it is set to just '.', i.e.
-# the current directory where make is run, which happens to be in
-# $(TOPDIR), because the target of the rule is not an actual file, so
-# does not have any path component).
+# need to have a valid @D set. But, because the configurators rules are
+# not real files and do not contain the path to the package build dir,
+# @D would be just '.' in this case. So, we use an intermediate rule
+# with a stamp-like file which path is in the package build dir, so we
+# end up having a valid @D.
#
-$$(addprefix $(1)-,$$($(2)_KCONFIG_EDITORS)): @D=$$($(2)_DIR)
-$$(addprefix $(1)-,$$($(2)_KCONFIG_EDITORS)): $$($(2)_DIR)/.stamp_kconfig_fixup_done
+$$(addprefix $(1)-,$$($(2)_KCONFIG_EDITORS)): $(1)-%: $$($(2)_DIR)/.kconfig_editor_%
+$$($(2)_DIR)/.kconfig_editor_%: $$($(2)_DIR)/.stamp_kconfig_fixup_done
$$($(2)_MAKE_ENV) $$(MAKE) -C $$($(2)_DIR) \
- $$($(2)_KCONFIG_OPTS) $$(subst $(1)-,,$$@)
+ $$($(2)_KCONFIG_OPTS) $$(*)
rm -f $$($(2)_DIR)/.stamp_{kconfig_fixup_done,configured,built}
rm -f $$($(2)_DIR)/.stamp_{target,staging,images}_installed
$$(call $(2)_FIXUP_DOT_CONFIG)
@@ -169,6 +170,7 @@ endif # package enabled
$(1)-update-defconfig \
$(1)-savedefconfig \
$(1)-check-configuration-done \
+ $$($(2)_DIR)/.kconfig_editor_% \
$$(addprefix $(1)-,$$($(2)_KCONFIG_EDITORS))
endef # inner-kconfig-package