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Slightly alter the CMake configuration so that TBB becomes truly optional #27

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Slightly alter the CMake configuration so that TBB becomes truly optional #27

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7 changes: 5 additions & 2 deletions Config.cmake.in
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Original file line number Diff line number Diff line change
Expand Up @@ -3,8 +3,11 @@
include("${CMAKE_CURRENT_LIST_DIR}/ctrackTargets.cmake")

if(NOT MSVC AND NOT CTRACK_DISABLE_EXECUTION_POLICY)
include(CMakeFindDependencyMacro)
find_dependency(TBB QUIET)
# Use plain find_package (not find_dependency!) so that TBB stays
# truly optional even when the consumer calls find_package(ctrack REQUIRED).
# find_dependency() would silently forward REQUIRED to this call and
# turn a missing TBB into a fatal configure error.
find_package(TBB QUIET)
if(NOT TBB_FOUND)
message(STATUS "TBB not found. Disabling parallel execution for ctrack.")
set(CTRACK_DISABLE_EXECUTION_POLICY ON)
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