Hi Adolfo, I think you already answered your question yourself, though maybe you didn't realize it. Fortunately you wrote the key phrase
... Now if I clear all non-internal Boost_* cache variables ... The thing is, FindBoost keeps track of the components it has already found in internal variables named Boost_<component>_FOUND. So, if you don't remove these variables from the cache, you're entering the realm of undefined behaviour. I don't know if the author(s) of FindBoost are to blame, e.g., for possible abuse of internal variables; or that you should never do what you did. I'm more of a command-line person, so I have no experience with groups in the cmake-gui. Best regards, Marcel Loose. On Mon, 2009-12-21 at 10:37 +0100, Adolfo Rodríguez Tsouroukdissian wrote: > Hi all, > > I have a use case where find_package(Boost COMPONENTS xxx) is called > more than once, and each time with a different set of components, as > in the following example: > > > cmake_minimum_required(VERSION 2.6) > project(MyBoost) > > find_package(Boost REQUIRED COMPONENTS date_time) > message(STATUS "1st call: Boost_LIBRARIES=${Boost_LIBRARIES}") > > find_package(Boost REQUIRED COMPONENTS regex) > message(STATUS "2nd call: Boost_LIBRARIES=${Boost_LIBRARIES}") > > > Upon configuring the project for the first time, everything works as > expected, and the relevant output I get is: > -- 1st call: Boost_LIBRARIES=/opt/boost/lib/libboost_date_time-mt.so > -- 2nd call: > Boost_LIBRARIES=/opt/boost/lib/libboost_date_time-mt.so;/opt/boost/lib/libboost_regex-mt.so > > > Now if I clear all non-internal Boost_* cache variables, such as by > removing the Boost group in cmake-gui and reconfigure my project, I > get > > -- 1st call: Boost_LIBRARIES=/opt/boost/lib/libboost_date_time-mt.so > -- 2nd call: Boost_LIBRARIES=/opt/boost/lib/libboost_date_time-mt.so > > > Which is unexpected. Should the above example work for the two > described scenarios, or am I entering some state that yields undefined > behavior? > > Thanks in advance, > > Adolfo > > -- > Adolfo Rodríguez Tsouroukdissian, Ph. D. > > Robotics engineer > PAL ROBOTICS S.L > http://www.pal-robotics.com > Tel. +34.93.414.53.47 > Fax.+34.93.209.11.09 > AVISO DE CONFIDENCIALIDAD: Este mensaje y sus documentos adjuntos, > pueden contener información privilegiada y/o confidencial que está > dirigida exclusivamente a su destinatario. Si usted recibe este > mensaje y no es el destinatario indicado, o el empleado encargado de > su entrega a dicha persona, por favor, notifíquelo inmediatamente y > remita el mensaje original a la dirección de correo electrónico > indicada. Cualquier copia, uso o distribución no autorizados de esta > comunicación queda estrictamente prohibida. > > CONFIDENTIALITY NOTICE: This e-mail and the accompanying document(s) > may contain confidential information which is privileged and intended > only for the individual or entity to whom they are addressed. If you > are not the intended recipient, you are hereby notified that any > disclosure, copying, distribution or use of this e-mail and/or > accompanying document(s) is strictly prohibited. If you have received > this e-mail in error, please immediately notify the sender at the > above e-mail address. > _______________________________________________ > Powered by www.kitware.com > > Visit other Kitware open-source projects at > http://www.kitware.com/opensource/opensource.html > > Please keep messages on-topic and check the CMake FAQ at: > http://www.cmake.org/Wiki/CMake_FAQ > > Follow this link to subscribe/unsubscribe: > http://www.cmake.org/mailman/listinfo/cmake _______________________________________________ Powered by www.kitware.com Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html Please keep messages on-topic and check the CMake FAQ at: http://www.cmake.org/Wiki/CMake_FAQ Follow this link to subscribe/unsubscribe: http://www.cmake.org/mailman/listinfo/cmake