[lttng-dev] Odd dependency for lttng-ust

[Thibault, Daniel]

I'm starting from a clean Ubuntu 12.04 installation after adding the various prerequisites of the git.lttng.org LTTng 2 packages:

LTTng 2 Packages (in the proper dependency order):

lttng-modules (2.1.0+-c6403de)
userspace-rcu (0.7.6-da9bed2)
lttng-ust (2.1.0+-340f776)
lttng-tools (2.1.1+-281047b)

Prerequisites installed:

automake
binutils-gold
bison
flex
libpopt-dev
libtool
libuuid1
python-dev
swig2.0
kernel's headers (i.e. linux-headers-generic)
texinfo
g++

After making and installing lttng-modules and userspace-rcu successfully, lttng-ust's configure fails with:

checking for _cds_lfht_new in -lurcu-cds... no
configure: error: Cannot find
liburcu-cds lib, part of Userspace RCU 0.7 or better.

This occurs even though userspace-rcu installed /usr/local/lib/liburcu-cds.  It seems I must install liburcu-dev from the LTTng PPA (because the current Ubuntu liburcu-dev is 0.6.7 while lttng-ust requires 0.7 or better) before I can configure lttng-ust properly.  This is a weird bootstrapping problem: could the userspace-rcu package's install be incomplete?

Daniel U. Thibault
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