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FindBoost: Honor BOOST_ROOT when finding upstream BoostConfig

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Fixes: #21200
This commit is contained in:
Brad King
2020-10-22 10:36:20 -04:00
parent b32cb33275
commit 4b2a61946f
1 changed files with 6 additions and 0 deletions
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6
Modules/FindBoost.cmake
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@@ -450,7 +450,13 @@ if (NOT Boost_NO_BOOST_CMAKE)
# Do the same find_package call but look specifically for the CMake version.
# Note that args are passed in the Boost_FIND_xxxxx variables, so there is no
# need to delegate them to this find_package call.
cmake_policy(PUSH)
if(BOOST_ROOT AND NOT Boost_ROOT)
cmake_policy(SET CMP0074 NEW)
set(Boost_ROOT "${BOOST_ROOT}")
endif()
find_package(Boost QUIET NO_MODULE ${_boost_FIND_PACKAGE_ARGS})
cmake_policy(POP)
if (DEFINED Boost_DIR)
mark_as_advanced(Boost_DIR)
endif ()