make TBB optional

CMakeLists.txt

@@ -12,7 +12,7 @@ endif()
 option(BUILD_TESTS "Build test" OFF)
 option(BUILD_DEMO "Build demo programs" OFF)
 option(BUILD_EXAMPLE "Build example programs" OFF)
-option(BUILD_WITH_TBB "Build with TBB support" ON)
+option(BUILD_WITH_TBB "Build with TBB support" OFF)
 option(BUILD_WITH_OPENMP "Build with OpenMP support" ON)
 option(BUILD_WITH_CUDA "Build with GPU support" OFF)
 option(BUILD_WITH_CUDA_MULTIARCH "Build with CUDA multi-architecture support" OFF)

cmake/FindGTSAM.cmake

@@ -12,16 +12,25 @@ find_library(GTSAM_UNSTABLE_LIB NAMES gtsam_unstable
   HINTS /usr/local/lib /usr/lib
   DOC "GTSAM_UNSTABLE libraries")
 
-find_library(TBB_LIB NAMES tbb
-  HINTS /usr/local/lib /usr/lib
-  DOC "TBB libraries")
 
-find_library(TBB_MALLOC_LIB NAMES tbbmalloc
-  HINTS /usr/local/lib /usr/lib
-  DOC "TBB malloc libraries")
+if(GTSAM_LIB AND GTSAM_UNSTABLE_LIB)
+  set(GTSAM_LIBRARIES ${GTSAM_LIB} ${GTSAM_UNSTABLE_LIB})
+endif()
 
-if(GTSAM_LIB AND GTSAM_UNSTABLE_LIB AND TBB_LIB)
-  set(GTSAM_LIBRARIES ${GTSAM_LIB} ${GTSAM_UNSTABLE_LIB} ${TBB_LIB} ${TBB_MALLOC_LIB})
+if(GTSAM_POINTS_USE_TBB)
+  find_library(TBB_LIB NAMES tbb
+    HINTS /usr/local/lib /usr/lib
+    DOC "TBB libraries")
+
+  find_library(TBB_MALLOC_LIB NAMES tbbmalloc
+    HINTS /usr/local/lib /usr/lib
+    DOC "TBB malloc libraries")
+
+  if(TBB_LIB AND TBB_MALLOC_LIB)
+    set(GTSAM_LIBRARIES ${GTSAM_LIBRARIES} ${TBB_LIB} ${TBB_MALLOC_LIB})
+  else()
+    message(FATAL_ERROR "TBB libraries not found")
+  endif()
 endif()
 
 add_library(GTSAM::GTSAM INTERFACE IMPORTED GLOBAL)