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cmake: use ENV variable BOOST_SOURCE_DIR if present
if BOOST_SOURCE_DIR is defined in ENV variable, and is not overruled by -DBOOST_SOURCE_DIR at cmake invocation then we use it. If BOOST_SOURCE_DIR is not defined in ENV variable, and not defined by -DBOOST_SOURCE_DIR, then we look for the system compiled boost. -> allows to set up BOOST_SOURCE_DIR in your bashrc on machine where boost compilation is needed, once for all
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@ -146,6 +146,14 @@ message(STATUS "MPI_CXX_INCLUDE_PATH : ${MPI_CXX_INCLUDE_PATH}")
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message( STATUS "-------- Boost detection -------------")
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# Check user input for BOOST_SOURCE_DIR
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# If user has defined BOOST_SOURCE_DIR in environment variable,
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# and not overruled in on the command line -DBOOST_SOURCE_DIR, we take it
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# If -DBOOST_SOURCE_DIR is not set, nor is the env variable BOOST_SOURCE_DIR,
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# we take the installed one.
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set (BOOST_SOURCE_DIR_ENV $ENV{BOOST_SOURCE_DIR})
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if (NOT BOOST_SOURCE_DIR AND BOOST_SOURCE_DIR_ENV)
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set (BOOST_SOURCE_DIR ${BOOST_SOURCE_DIR_ENV})
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endif()
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if(BOOST_SOURCE_DIR)
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if(NOT IS_ABSOLUTE ${BOOST_SOURCE_DIR})
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Message(FATAL_ERROR "You must specify an absolute path for BOOST_SOURCE_DIR.")
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