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From Andrew Stitcher <astitc...@redhat.com>
Subject Heads Up: Additional options to detect Proton and Qpid from other builds
Date Mon, 17 Mar 2014 19:02:06 GMT
[This refers to changes QPID-5632 and PROTON-536 which were commited to
trunk and should appear in Qpid 0.28 and Proton 0.7]

I've added some cmake config files to the files that qpid/proton install
so that in the usual case (for installed packages) you should be able to
just use the usual

find_package(Qpid) or find_package(Proton)

Commands to detect whether or not they are present on the system.
The usual other options for find_package should also apply - eg checking
for specific versions of the packages etc.

[I chose that capitalisation because it looks like that is how most
other packages are named in cmake.]

Cmake should automatically pick up the system installed version of the
config files and it will also pick packages already installed in to the
install prefix (as specified by CMAKE_INSTALL_PREFIX). If you are using
qpid or proton in a different place then the best way to tell cmake
where to look is to add the package install prefix to CMAKE_PREFIX_PATH.

Because cmake will automatically look in the install prefix I now
recommend that if you have your own custom proton and qpid installs you
use the same install prefix for both and just build/install proton
first, viz:

cd <bld location of proton>
cmake -DCMAKE_INSTALL_PREFIX=<install prefix> ...<other cmake options> 
<make> install

cd <bld location of qpid c++>
cmake -DCMAKE_INSTALL_PREFIX=<install prefix> ...<other cmake options>
<make> install

Note that the existing pkgconfig files are unchanged, so if you were
using pkg config to detect proton or qpid you won't be affected. However
if you were using cmake for your build system you now have another
(simpler and a preferred) way to detect/configure proton/qpid.

Questions comments to me here.
Bugs to Jira.

Andrew



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