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debian: enable build hardening features
Debian's build hardening toolchain options produce binary artifacts that are more resistant to compromise. The most visible change for notmuch today is likely to be the addition of the "bindnow" linker flag, which contributes to making the "Global Offset Table" fully read-only. See https://wiki.debian.org/Hardening for more details. Signed-off-by: Daniel Kahn Gillmor <dkg@fifthhorseman.net>
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debian/rules
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debian/rules
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@ -2,6 +2,8 @@
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python3_all = py3versions -s | xargs -n1 | xargs -t -I {} env {}
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export DEB_BUILD_MAINT_OPTIONS = hardening=+all
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%:
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dh $@ --with python2,python3,elpa
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