---------- Forwarded message ----------
From:
Daniel PerezDate: 2011/2/16
Subject: Re: Fwd: [Boost-cmake] find_package and Boost.Cmake
I've been using an ugly trick
for that purpose but I guess there might be a more beautiful way to do
so by tweaking PATHS or other CMake variables.
I disable /usr/include when I include
Boost headers since it seems that /usr/include always get first in find_package
(I insist: there might be a nicer way to tell CMake which paths to use,
but I didn't find). I do as follows:
1) Unzip a Boost distribution
somewhere in your project's sources and enable it with include_directories().
I put Boost in the root of my sources so that I don't have to enable it
with include_directories() since the root of the sources is always included
by default in my projects.
2) In your CMakeLists.txt
you add:
find_package( Boost 1.43.0 )
if(Boost_FOUND)
include_directories(${Boost_INCLUDE_DIRS})
else()
set (USE_IN_SOURCE_TREE_BOOST true)
endif()
so USE_IN_SOURCE_TREE_BOOST
is defined in the case Boost is not found in the system. If you always
want to use the in-source Boost, define that variable unconditionally.
Take into consideration that I'm assuming that if you ship your own Boost
version it means that you don't care about the version checks and the include
paths checks. To note that this assumption only holds for header-only distributions
of Boost.
3) You disable /usr/include
for the desired set of headers by clearing STANDARD_INCLUDE_DIR:
#ifdef USE_IN_SOURCE_TREE_BOOST
#define STANDARD_INCLUDE_DIR
#endif
// BOOST Gregorian
#include <boost/date_time/gregorian/gregorian.hpp>
// BOOST Spirit
#include <boost/spirit/include/qi.hpp>
// BOOST_TYPEOF
#include <boost/typeof/typeof.hpp>
// This is needed to use Fusion & maps
#include <boost/fusion/include/std_pair.hpp>
// Phoenix Bind, << operator for val() and some others,
// construct<> and at_c
#include <boost/spirit/include/phoenix.hpp>
#include <boost/spirit/include/phoenix_operator.hpp>
#include <boost/spirit/include/phoenix_object.hpp>
#include <boost/spirit/home/phoenix/bind/bind_function.hpp>
#include <boost/spirit/include/phoenix_fusion.hpp>
I clear this variable in a .cpp file
so it's not dangerous.
I hope it helps. And please, let me
know if you find a better way of doing this (by supplying PATHS or the
like).
Dani