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build: cleanup possibly dangling Python 3 host symlink 

When switching from master branch to 19.07 or older, we need to ensure
that Python symlink in staging bin directory points to Python 2.

We can't rely completly just on SetupHostCommand as its executed only in
cases when the $(STAGING_DIR_HOST)/bin/python doesn't already exist, so
we need to remove it before running SetupHostCommand.

This is a cherry-pick of 3b68fb57c9
with python3 instead of python2

Signed-off-by: Petr Štetiar <ynezz@true.cz>
Signed-off-by: Etienne Champetier <champetier.etienne@gmail.com>
(cherry picked from commit 799de7c641)
openwrt-18.06
Etienne Champetier 2019-11-08 06:58:01 -08:00 committed by Petr Štetiar
parent dfd8c3bfdc
commit c1d19b37d5
2 changed files with 14 additions and 0 deletions
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2
include/prereq-build.mk
View File

@ -141,6 +141,8 @@ $(eval $(call SetupHostCommand,wget,Please install GNU 'wget', \
$(eval $(call SetupHostCommand,perl,Please install Perl 5.x, \
perl --version | grep "perl.*v5"))
$(eval $(call CleanupPython3))
$(eval $(call SetupHostCommand,python,Please install Python 2.x, \
python2.7 -V 2>&1 | grep 'Python 2.7', \
python2 -V 2>&1 | grep 'Python 2', \

12
include/prereq.mk
View File

@ -66,6 +66,18 @@ define RequireHeader
$$(eval $$(call Require,$(1),$(2)))
endef
define CleanupPython3
define Require/python3-cleanup
if [ -f "$(STAGING_DIR_HOST)/bin/python" ] && \
$(STAGING_DIR_HOST)/bin/python -V 2>&1 | \
grep -q 'Python 3'; then \
rm $(STAGING_DIR_HOST)/bin/python; \
fi
endef
$$(eval $$(call Require,python3-cleanup))
endef
define QuoteHostCommand
'$(subst ','"'"',$(strip $(1)))'
endef