* Jonas Smedegaard <d...@jones.dk>, 2015-07-23, 21:40:
One mistake boost makes is using ":=" instead of plain "=". Contrary
to popular belief, the former almost always causes more evaluation of
$(shell) stuff, specially when dh is involved.
Could you elaborate on that?
dpkg-buildpackage -B will run debian/rules 4 times: once to determine if
build-arch exist, and once for every target: clean, build(-arch),
binary-arch.
dh adds even more debian/rules invocations. It runs it once every target
(clean, build(-arch), binary-arch), and once for every override.
So your ":=" variable will be evaluated 4 times, or 7+N times if you use
dh.
"=" variables will be evaluated only when they are used, which is less
than 4 or 7+N in most cases.
--
Jakub Wilk
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