c++ - Ubuntu Qt link boost log -

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i try link boost 1.55 log library qt *.pro file.

includepath += $$system(echo ${boost_include_dir})   libs += -l$$system(echo ${boost_lib_dir})  libs += -lboost_system -lboost_filesystem -lboost_thread -lboost_log

i reference error boost log , because didn't define 

-dboost_log_dyn_link

can tell me how define inside *.pro file?

in cmake file can use: add_definitions(-dboost_log_dyn_link)

what corresponding command in qmake?

use defines:

defines += boost_log_dyn_link

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