diff --git a/cmake/GtsamBuildTypes.cmake b/cmake/GtsamBuildTypes.cmake
index 55ddf61bc..cf0dfdfc7 100644
--- a/cmake/GtsamBuildTypes.cmake
+++ b/cmake/GtsamBuildTypes.cmake
@@ -207,7 +207,8 @@ if(${CMAKE_CXX_COMPILER_ID} STREQUAL "Clang")
   endif()
 endif()
 
-if (NOT MSVC)
+if ((NOT MSVC) AND (NOT QNX))
+  option(GTSAM_BUILD_WITH_MARCH_NATIVE  "Enable/Disable building with all instructions supported by native architecture (binary may not be portable!)" ON)
   if(GTSAM_BUILD_WITH_MARCH_NATIVE)
     # Check if Apple OS and compiler is [Apple]Clang
     if(APPLE AND (${CMAKE_CXX_COMPILER_ID} MATCHES "^(Apple)?Clang$"))
diff --git a/cmake/GtsamTesting.cmake b/cmake/GtsamTesting.cmake
index 47b059213..3135ffc18 100644
--- a/cmake/GtsamTesting.cmake
+++ b/cmake/GtsamTesting.cmake
@@ -197,9 +197,11 @@ macro(gtsamAddTestsGlob_impl groupName globPatterns excludedFiles linkLibraries)
 
 				# Add TOPSRCDIR
 				set_property(SOURCE ${script_src} APPEND PROPERTY COMPILE_DEFINITIONS "TOPSRCDIR=\"${GTSAM_SOURCE_DIR}\"")
-
+				
 				# Exclude from 'make all' and 'make install'
-				set_target_properties(${script_name} PROPERTIES EXCLUDE_FROM_ALL ON)
+				if(NOT QNX OR NOT DEFINED ENV{QNX_BUILD_TESTS})
+					set_target_properties(${script_name} PROPERTIES EXCLUDE_FROM_ALL ON)
+				endif()
 
 				# Configure target folder (for MSVC and Xcode)
 				set_property(TARGET ${script_name} PROPERTY FOLDER "Unit tests/${groupName}")
@@ -240,8 +242,10 @@ macro(gtsamAddTestsGlob_impl groupName globPatterns excludedFiles linkLibraries)
 			set_property(SOURCE ${script_srcs} APPEND PROPERTY COMPILE_DEFINITIONS "TOPSRCDIR=\"${GTSAM_SOURCE_DIR}\"")
 
 			# Exclude from 'make all' and 'make install'
-			set_target_properties(${target_name} PROPERTIES EXCLUDE_FROM_ALL ON)
-
+			if(NOT QNX OR NOT DEFINED ENV{QNX_BUILD_TESTS})
+				set_target_properties(${target_name} PROPERTIES EXCLUDE_FROM_ALL ON)
+			endif()
+		
 			# Configure target folder (for MSVC and Xcode)
 			set_property(TARGET ${script_name} PROPERTY FOLDER "Unit tests")
 		endif()
diff --git a/cmake/HandlePrintConfiguration.cmake b/cmake/HandlePrintConfiguration.cmake
index ac68be20f..17693e46c 100644
--- a/cmake/HandlePrintConfiguration.cmake
+++ b/cmake/HandlePrintConfiguration.cmake
@@ -22,7 +22,7 @@ if(GTSAM_UNSTABLE_AVAILABLE)
     print_enabled_config(${GTSAM_UNSTABLE_INSTALL_MATLAB_TOOLBOX} "Build MATLAB Toolbox for unstable")
 endif()
 
-if(NOT MSVC AND NOT XCODE_VERSION)
+if(NOT MSVC AND NOT XCODE_VERSION AND NOT QNX)
     print_enabled_config(${GTSAM_BUILD_WITH_MARCH_NATIVE}     "Build for native architecture  ")
     print_config("Build type" "${CMAKE_BUILD_TYPE}")
     print_config("C compilation flags" "${CMAKE_C_FLAGS} ${CMAKE_C_FLAGS_${CMAKE_BUILD_TYPE_UPPER}}")
diff --git a/gtsam/3rdparty/ceres/CMakeLists.txt b/gtsam/3rdparty/ceres/CMakeLists.txt
index 98b2cffce..e8d39da67 100644
--- a/gtsam/3rdparty/ceres/CMakeLists.txt
+++ b/gtsam/3rdparty/ceres/CMakeLists.txt
@@ -1,2 +1,7 @@
 file(GLOB ceres_headers "${CMAKE_CURRENT_SOURCE_DIR}/*.h")
-install(FILES ${ceres_headers} DESTINATION include/gtsam/3rdparty/ceres)
\ No newline at end of file
+if(NOT QNX)
+    install(FILES ${ceres_headers} DESTINATION include/gtsam/3rdparty/ceres)
+else()
+    #Install in the install include directory rather than at the install prefix.
+    install(FILES ${ceres_headers} DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/gtsam/3rdparty/ceres)
+endif()
\ No newline at end of file
diff --git a/gtsam/3rdparty/metis/include/CMakeLists.txt b/gtsam/3rdparty/metis/include/CMakeLists.txt
index 73754eebf..0d5af2e83 100644
--- a/gtsam/3rdparty/metis/include/CMakeLists.txt
+++ b/gtsam/3rdparty/metis/include/CMakeLists.txt
@@ -1 +1,6 @@
-install(FILES metis.h DESTINATION include/gtsam/3rdparty/metis)
\ No newline at end of file
+if(NOT QNX)
+    install(FILES metis.h DESTINATION include/gtsam/3rdparty/metis)
+else()
+    #Install in the install include directory rather than at the install prefix.
+    install(FILES metis.h DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/gtsam/3rdparty/metis)
+endif()
\ No newline at end of file
diff --git a/gtsam/CMakeLists.txt b/gtsam/CMakeLists.txt
index 3c2073547..db4a982a0 100644
--- a/gtsam/CMakeLists.txt
+++ b/gtsam/CMakeLists.txt
@@ -99,6 +99,10 @@ IF(MSVC)
 ENDIF(MSVC)
 
 # Generate and install config and dllexport files
+#For config.in searches
+if(QNX)
+set(QNX_TARGET_DATASET_DIR "$ENV{QNX_TARGET_DATASET_DIR}")
+endif()
 configure_file(config.h.in config.h)
 set(library_name GTSAM) # For substitution in dllexport.h.in
 configure_file("${GTSAM_SOURCE_DIR}/cmake/dllexport.h.in" "dllexport.h")
diff --git a/gtsam/base/CMakeLists.txt b/gtsam/base/CMakeLists.txt
index 66d3ec721..2989bbaab 100644
--- a/gtsam/base/CMakeLists.txt
+++ b/gtsam/base/CMakeLists.txt
@@ -1,9 +1,17 @@
 # Install headers
+# Header groups
 file(GLOB base_headers "*.h")
-install(FILES ${base_headers} DESTINATION include/gtsam/base)
-
 file(GLOB base_headers_tree "treeTraversal/*.h")
-install(FILES ${base_headers_tree} DESTINATION include/gtsam/base/treeTraversal)
+
+# Installation
+if(NOT QNX)
+    install(FILES ${base_headers} DESTINATION include/gtsam/base)
+    install(FILES ${base_headers_tree} DESTINATION include/gtsam/base/treeTraversal)
+else()
+    # For QNX, Install in the Installation's Include Directory
+    install(FILES ${base_headers} DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/gtsam/base)
+    install(FILES ${base_headers_tree} DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/gtsam/base/treeTraversal)
+endif()
 
 # Build tests
 add_subdirectory(tests)
diff --git a/gtsam/base/std_optional_serialization.h b/gtsam/base/std_optional_serialization.h
index 93a5c8dba..e11a167ff 100644
--- a/gtsam/base/std_optional_serialization.h
+++ b/gtsam/base/std_optional_serialization.h
@@ -52,6 +52,10 @@ namespace boost { namespace serialization { struct U; } }
 namespace std { template<> struct is_trivially_default_constructible<boost::serialization::U> : std::false_type {}; }
 namespace std { template<> struct is_trivially_copy_constructible<boost::serialization::U> : std::false_type {}; }
 namespace std { template<> struct is_trivially_move_constructible<boost::serialization::U> : std::false_type {}; }
+// QCC (The QNX GCC-based Compiler) also has this issue, but it also extends to trivial destructor.
+#if defined(__QNX__)
+namespace std { template<> struct is_trivially_destructible<boost::serialization::U> : std::false_type {}; }
+#endif
 #endif
 #endif
 
diff --git a/gtsam/basis/CMakeLists.txt b/gtsam/basis/CMakeLists.txt
index 203fd96a2..98e6076e9 100644
--- a/gtsam/basis/CMakeLists.txt
+++ b/gtsam/basis/CMakeLists.txt
@@ -1,6 +1,10 @@
 # Install headers
 file(GLOB basis_headers "*.h")
-install(FILES ${basis_headers} DESTINATION include/gtsam/basis)
+if(NOT QNX)
+    install(FILES ${basis_headers} DESTINATION include/gtsam/basis) 
+else()
+    install(FILES ${basis_headers} DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/gtsam/basis)
+endif()
 
 # Build tests
 add_subdirectory(tests)
diff --git a/gtsam/config.h.in b/gtsam/config.h.in
index 58b93ee1c..9ba562cc4 100644
--- a/gtsam/config.h.in
+++ b/gtsam/config.h.in
@@ -26,7 +26,12 @@
 
 // Paths to example datasets distributed with GTSAM
 #define GTSAM_SOURCE_TREE_DATASET_DIR "@GTSAM_SOURCE_DIR@/examples/Data"
+#if !defined(__QNX__) 
 #define GTSAM_INSTALLED_DATASET_DIR "@GTSAM_TOOLBOX_INSTALL_PATH@/gtsam_examples/Data"
+#else
+//Set toolbox path to the path on the target.
+#define GTSAM_INSTALLED_DATASET_DIR "@QNX_TARGET_DATASET_DIR@/gtsam_examples/Data"
+#endif
 
 // Whether GTSAM is compiled to use quaternions for Rot3 (otherwise uses rotation matrices)
 #cmakedefine GTSAM_USE_QUATERNIONS
diff --git a/gtsam/discrete/CMakeLists.txt b/gtsam/discrete/CMakeLists.txt
index 1c6aa9747..a4b5cc681 100644
--- a/gtsam/discrete/CMakeLists.txt
+++ b/gtsam/discrete/CMakeLists.txt
@@ -1,7 +1,12 @@
 # Install headers
 set(subdir discrete)
 file(GLOB discrete_headers "*.h")
-install(FILES ${discrete_headers} DESTINATION include/gtsam/discrete)
+# FIXME: exclude headers
+if(QNX)
+    install(FILES ${discrete_headers} DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/gtsam/discrete)
+else()
+    install(FILES ${discrete_headers} DESTINATION include/gtsam/discrete)
+endif()
 
 # Add all tests
 add_subdirectory(tests)
diff --git a/gtsam/geometry/CMakeLists.txt b/gtsam/geometry/CMakeLists.txt
index dabdde45c..fb96d23de 100644
--- a/gtsam/geometry/CMakeLists.txt
+++ b/gtsam/geometry/CMakeLists.txt
@@ -1,6 +1,10 @@
 # Install headers
 file(GLOB geometry_headers "*.h")
-install(FILES ${geometry_headers} DESTINATION include/gtsam/geometry)
+if(QNX)
+    install(FILES ${geometry_headers} DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/gtsam/geometry)
+else()
+    install(FILES ${geometry_headers} DESTINATION include/gtsam/geometry)
+endif()
 
 # Build tests
 add_subdirectory(tests)
diff --git a/gtsam/inference/CMakeLists.txt b/gtsam/inference/CMakeLists.txt
index c3df3a989..2344221bc 100644
--- a/gtsam/inference/CMakeLists.txt
+++ b/gtsam/inference/CMakeLists.txt
@@ -1,6 +1,10 @@
 # Install headers
 file(GLOB inference_headers "*.h")
-install(FILES ${inference_headers} DESTINATION include/gtsam/inference)
+if(QNX)
+    install(FILES ${inference_headers} DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/gtsam/inference)
+else()
+    install(FILES ${inference_headers} DESTINATION include/gtsam/inference)
+endif()
 
 # Build tests
 add_subdirectory(tests)
diff --git a/gtsam/inference/tests/testOrdering.cpp b/gtsam/inference/tests/testOrdering.cpp
index b6cfcb6ed..7b7628f5b 100644
--- a/gtsam/inference/tests/testOrdering.cpp
+++ b/gtsam/inference/tests/testOrdering.cpp
@@ -303,7 +303,7 @@ TEST(Ordering, MetisLoop) {
   symbolicGraph.push_factor(0, 5);
 
   // METIS
-#if defined(__APPLE__)
+#if defined(__APPLE__) || defined(__QNX__)
   {
     Ordering actual = Ordering::Create(Ordering::METIS, symbolicGraph);
     //  - P( 1 0 3)
diff --git a/gtsam/linear/CMakeLists.txt b/gtsam/linear/CMakeLists.txt
index 084c27057..e3947851c 100644
--- a/gtsam/linear/CMakeLists.txt
+++ b/gtsam/linear/CMakeLists.txt
@@ -1,6 +1,10 @@
 # Install headers
 file(GLOB linear_headers "*.h")
-install(FILES ${linear_headers} DESTINATION include/gtsam/linear)
+if(QNX)
+    install(FILES ${linear_headers} DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/gtsam/linear)
+else()
+    install(FILES ${linear_headers} DESTINATION include/gtsam/linear)
+endif()
 
 # Build tests
 add_subdirectory(tests)
diff --git a/gtsam/navigation/CMakeLists.txt b/gtsam/navigation/CMakeLists.txt
index e2b2fdce6..c266b353a 100644
--- a/gtsam/navigation/CMakeLists.txt
+++ b/gtsam/navigation/CMakeLists.txt
@@ -1,6 +1,10 @@
 # Install headers
 file(GLOB navigation_headers "*.h")
-install(FILES ${navigation_headers} DESTINATION include/gtsam/navigation)
+if(QNX)
+    install(FILES ${navigation_headers} DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/gtsam/navigation)
+else()
+    install(FILES ${navigation_headers} DESTINATION include/gtsam/navigation)
+endif()
 
 # Add all tests
 add_subdirectory(tests)
diff --git a/gtsam/nonlinear/CMakeLists.txt b/gtsam/nonlinear/CMakeLists.txt
index 29ff2efa5..98facc59e 100644
--- a/gtsam/nonlinear/CMakeLists.txt
+++ b/gtsam/nonlinear/CMakeLists.txt
@@ -1,9 +1,16 @@
 # Install headers
 file(GLOB nonlinear_headers "*.h")
-install(FILES ${nonlinear_headers} DESTINATION "include/gtsam/nonlinear")
+if(QNX)
+    install(FILES ${nonlinear_headers} DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/gtsam/nonlinear)
+else()
+    install(FILES ${nonlinear_headers} DESTINATION include/gtsam/nonlinear)
+endif()
 
 file(GLOB nonlinear_headers_internal "internal/*.h")
-install(FILES ${nonlinear_headers_internal} DESTINATION "include/gtsam/nonlinear/internal")
-
+if(QNX)
+    install(FILES ${nonlinear_headers_internal} DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/gtsam/nonlinear/internal)
+else()
+    install(FILES ${nonlinear_headers_internal} DESTINATION include/gtsam/nonlinear/internal)
+endif()
 # Build tests
 add_subdirectory(tests)
diff --git a/gtsam/nonlinear/tests/testSerializationNonlinear.cpp b/gtsam/nonlinear/tests/testSerializationNonlinear.cpp
index d6f693a23..a96ede430 100644
--- a/gtsam/nonlinear/tests/testSerializationNonlinear.cpp
+++ b/gtsam/nonlinear/tests/testSerializationNonlinear.cpp
@@ -32,7 +32,6 @@ using namespace std;
 using namespace gtsam;
 using namespace gtsam::serializationTestHelpers;
 
-
 /* ************************************************************************* */
 // Create GUIDs for Noisemodels
 BOOST_CLASS_EXPORT_GUID(gtsam::noiseModel::Diagonal, "gtsam_noiseModel_Diagonal")
@@ -153,9 +152,15 @@ TEST(Serialization, NoiseModelFactor1_backwards_compatibility) {
 
   // Deserialize XML
   PriorFactor<Pose3> factor_deserialized_xml = PriorFactor<Pose3>();
+  #if !defined(__QNX__)
   deserializeFromXMLFile(GTSAM_SOURCE_TREE_DATASET_DIR
                          "/../../gtsam/nonlinear/tests/priorFactor.xml",
                          factor_deserialized_xml);
+  #else
+  bool c = deserializeFromXMLFile(
+                        "priorFactor.xml",
+                        factor_deserialized_xml);
+  #endif
   EXPECT(assert_equal(factor, factor_deserialized_xml));
 #endif
 }
diff --git a/gtsam/sam/CMakeLists.txt b/gtsam/sam/CMakeLists.txt
index bf20b751c..0ba13f837 100644
--- a/gtsam/sam/CMakeLists.txt
+++ b/gtsam/sam/CMakeLists.txt
@@ -1,6 +1,10 @@
 # Install headers
 file(GLOB sam_headers "*.h")
-install(FILES ${sam_headers} DESTINATION include/gtsam/sam)
+if(QNX)
+    install(FILES ${sam_headers} DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/gtsam/sam)
+else()
+    install(FILES ${sam_headers} DESTINATION include/gtsam/sam)
+endif()
 
 # Build tests
 add_subdirectory(tests)
diff --git a/gtsam/sfm/CMakeLists.txt b/gtsam/sfm/CMakeLists.txt
index fde997840..c3286d81a 100644
--- a/gtsam/sfm/CMakeLists.txt
+++ b/gtsam/sfm/CMakeLists.txt
@@ -1,6 +1,10 @@
 # Install headers
 file(GLOB sfm_headers "*.h")
-install(FILES ${sfm_headers} DESTINATION include/gtsam/sfm)
+if(QNX)
+    install(FILES ${sfm_headers} DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/gtsam/sfm)
+else()
+    install(FILES ${sfm_headers} DESTINATION include/gtsam/sfm)
+endif()
 
 # Build tests
 add_subdirectory(tests)
diff --git a/gtsam/slam/CMakeLists.txt b/gtsam/slam/CMakeLists.txt
index 22645973d..b35293912 100644
--- a/gtsam/slam/CMakeLists.txt
+++ b/gtsam/slam/CMakeLists.txt
@@ -4,7 +4,11 @@ set (slam_excluded_headers #"")
 )
 
 file(GLOB slam_headers "*.h")
-install(FILES ${slam_headers} DESTINATION include/gtsam/slam)
+if(QNX)
+    install(FILES ${slam_headers} DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/gtsam/slam)
+else()
+    install(FILES ${slam_headers} DESTINATION include/gtsam/slam)
+endif()
 
 # Build tests
 add_subdirectory(tests)
diff --git a/gtsam/symbolic/CMakeLists.txt b/gtsam/symbolic/CMakeLists.txt
index feb073f69..2c25a0970 100644
--- a/gtsam/symbolic/CMakeLists.txt
+++ b/gtsam/symbolic/CMakeLists.txt
@@ -1,6 +1,10 @@
 # Install headers
 file(GLOB symbolic_headers "*.h")
-install(FILES ${symbolic_headers} DESTINATION include/gtsam/symbolic)
+if(QNX)
+    install(FILES ${symbolic_headers} DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/gtsam/symbolic)
+else()
+    install(FILES ${symbolic_headers} DESTINATION include/gtsam/symbolic)
+endif()
 
 # Build tests
 add_subdirectory(tests)
diff --git a/gtsam/symbolic/tests/testSymbolicBayesTree.cpp b/gtsam/symbolic/tests/testSymbolicBayesTree.cpp
index e4a47bdfb..04fe0434b 100644
--- a/gtsam/symbolic/tests/testSymbolicBayesTree.cpp
+++ b/gtsam/symbolic/tests/testSymbolicBayesTree.cpp
@@ -687,7 +687,7 @@ TEST(SymbolicBayesTree, COLAMDvsMETIS) {
   {
     Ordering ordering = Ordering::Create(Ordering::METIS, sfg);
 // Linux and Mac split differently when using Metis
-#if defined(__APPLE__)
+#if defined(__APPLE__) || defined(__QNX__)
     EXPECT(assert_equal(Ordering{5, 4, 2, 1, 0, 3}, ordering));
 #elif defined(_WIN32)
     EXPECT(assert_equal(Ordering{4, 3, 1, 0, 5, 2}, ordering));
@@ -700,7 +700,7 @@ TEST(SymbolicBayesTree, COLAMDvsMETIS) {
     //  | | - P( 5 | 0 4)
     //  | - P( 2 | 1 3)
     SymbolicBayesTree expected;
-#if defined(__APPLE__)
+#if defined(__APPLE__) || defined(__QNX__)
     expected.insertRoot(
         NodeClique(Keys(1)(0)(3), 3,
                    Children(                         //
diff --git a/gtsam_unstable/base/CMakeLists.txt b/gtsam_unstable/base/CMakeLists.txt
index 2cb96be36..b638302d8 100644
--- a/gtsam_unstable/base/CMakeLists.txt
+++ b/gtsam_unstable/base/CMakeLists.txt
@@ -1,6 +1,10 @@
 # Install headers
 file(GLOB base_headers "*.h")
-install(FILES ${base_headers} DESTINATION include/gtsam_unstable/base)
+if(QNX)
+    install(FILES ${base_headers} DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/gtsam_unstable/base)
+else()
+    install(FILES ${base_headers} DESTINATION include/gtsam_unstable/base)
+endif()
 
 # Add all tests
 add_subdirectory(tests)
diff --git a/gtsam_unstable/discrete/CMakeLists.txt b/gtsam_unstable/discrete/CMakeLists.txt
index 18346a45a..45e073fab 100644
--- a/gtsam_unstable/discrete/CMakeLists.txt
+++ b/gtsam_unstable/discrete/CMakeLists.txt
@@ -1,6 +1,10 @@
 # Install headers
 file(GLOB discrete_headers "*.h")
-install(FILES ${discrete_headers} DESTINATION include/gtsam_unstable/discrete)
+if(QNX)
+    install(FILES ${discrete_headers} DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/gtsam_unstable/discrete)
+else()
+    install(FILES ${discrete_headers} DESTINATION include/gtsam_unstable/discrete)
+endif()
 
 # Add all tests
 add_subdirectory(tests)
diff --git a/gtsam_unstable/discrete/tests/testScheduler.cpp b/gtsam_unstable/discrete/tests/testScheduler.cpp
index 5f9b7f287..ab3a0df05 100644
--- a/gtsam_unstable/discrete/tests/testScheduler.cpp
+++ b/gtsam_unstable/discrete/tests/testScheduler.cpp
@@ -140,7 +140,11 @@ TEST(schedulingExample, test) {
 
 /* ************************************************************************* */
 TEST(schedulingExample, smallFromFile) {
+  #if !defined(__QNX__)
   string path(TOPSRCDIR "/gtsam_unstable/discrete/examples/");
+  #else
+  string path(""); //Same Directory
+  #endif
   Scheduler s(2, path + "small.csv");
 
   // add areas
diff --git a/gtsam_unstable/dynamics/CMakeLists.txt b/gtsam_unstable/dynamics/CMakeLists.txt
index 66aef9455..bd5469f72 100644
--- a/gtsam_unstable/dynamics/CMakeLists.txt
+++ b/gtsam_unstable/dynamics/CMakeLists.txt
@@ -1,6 +1,10 @@
 # Install headers
 file(GLOB dynamics_headers "*.h")
-install(FILES ${dynamics_headers} DESTINATION include/gtsam_unstable/dynamics)
+if(QNX)
+    install(FILES ${dynamics_headers} DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/gtsam_unstable/dynamics)
+else()
+    install(FILES ${dynamics_headers} DESTINATION include/gtsam_unstable/dynamics)
+endif()
 
 # Add all tests
 add_subdirectory(tests)
diff --git a/gtsam_unstable/geometry/CMakeLists.txt b/gtsam_unstable/geometry/CMakeLists.txt
index c8b7e250f..3432bab19 100644
--- a/gtsam_unstable/geometry/CMakeLists.txt
+++ b/gtsam_unstable/geometry/CMakeLists.txt
@@ -1,6 +1,10 @@
 # Install headers
 file(GLOB geometry_headers "*.h")
-install(FILES ${geometry_headers} DESTINATION include/gtsam_unstable/geometry)
+if(QNX)
+    install(FILES ${geometry_headers} DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/gtsam_unstable/geometry)
+else()
+    install(FILES ${geometry_headers} DESTINATION include/gtsam_unstable/geometry)
+endif()
 
 # Add all tests
 add_subdirectory(tests)
diff --git a/gtsam_unstable/linear/CMakeLists.txt b/gtsam_unstable/linear/CMakeLists.txt
index 99a4b814e..50f7fb5fd 100644
--- a/gtsam_unstable/linear/CMakeLists.txt
+++ b/gtsam_unstable/linear/CMakeLists.txt
@@ -1,6 +1,10 @@
 # Install headers
 file(GLOB linear_headers "*.h")
-install(FILES ${linear_headers} DESTINATION include/gtsam_unstable/linear)
+if(QNX)
+    install(FILES ${linear_headers} DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/gtsam_unstable/linear)
+else()
+    install(FILES ${linear_headers} DESTINATION include/gtsam_unstable/linear)
+endif()
 
 # Add all tests
 add_subdirectory(tests)
diff --git a/gtsam_unstable/nonlinear/CMakeLists.txt b/gtsam_unstable/nonlinear/CMakeLists.txt
index 9e0cb68e1..b8483ecab 100644
--- a/gtsam_unstable/nonlinear/CMakeLists.txt
+++ b/gtsam_unstable/nonlinear/CMakeLists.txt
@@ -1,6 +1,10 @@
 # Install headers
 file(GLOB nonlinear_headers "*.h")
-install(FILES ${nonlinear_headers} DESTINATION include/gtsam_unstable/nonlinear)
+if(QNX)
+    install(FILES ${nonlinear_headers} DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/gtsam_unstable/nonlinear)
+else()
+    install(FILES ${nonlinear_headers} DESTINATION include/gtsam_unstable/nonlinear)
+endif()
 
 # Add all tests
 add_subdirectory(tests)
diff --git a/gtsam_unstable/partition/CMakeLists.txt b/gtsam_unstable/partition/CMakeLists.txt
index 74951bf93..f9e36a768 100644
--- a/gtsam_unstable/partition/CMakeLists.txt
+++ b/gtsam_unstable/partition/CMakeLists.txt
@@ -1,5 +1,9 @@
 # Install headers
 file(GLOB partition_headers "*.h")
-install(FILES ${partition_headers} DESTINATION include/gtsam_unstable/partition)
+if(QNX)
+    install(FILES ${partition_headers} DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/gtsam_unstable/partition)
+else()
+    install(FILES ${partition_headers} DESTINATION include/gtsam_unstable/partition)
+endif()
 
 add_subdirectory(tests)
diff --git a/gtsam_unstable/partition/tests/testFindSeparator.cpp b/gtsam_unstable/partition/tests/testFindSeparator.cpp
index a659c3c22..f425be8c7 100644
--- a/gtsam_unstable/partition/tests/testFindSeparator.cpp
+++ b/gtsam_unstable/partition/tests/testFindSeparator.cpp
@@ -104,7 +104,13 @@ TEST ( Partition, edgePartitionByMetis2 )
   graph.push_back(std::make_shared<GenericFactor3D>(1, 2, 1, NODE_POSE_3D, NODE_POSE_3D, 1));
   graph.push_back(std::make_shared<GenericFactor3D>(2, 3, 2, NODE_POSE_3D, NODE_POSE_3D, 20));
   graph.push_back(std::make_shared<GenericFactor3D>(3, 4, 3, NODE_POSE_3D, NODE_POSE_3D, 1));
+  //QNX Testing: fix tiebreaker to match 
+  #if !defined(__QNX__)
   std::vector<size_t> keys{0, 1, 2, 3, 4};
+  #else
+  //Anything where 2 is before 0 will work.
+  std::vector<size_t> keys{2, 0, 3, 1, 4};
+  #endif
 
   WorkSpace workspace(6);
   std::optional<MetisResult> actual = edgePartitionByMetis<GenericGraph3D>(graph, keys,
diff --git a/gtsam_unstable/slam/CMakeLists.txt b/gtsam_unstable/slam/CMakeLists.txt
index a86beac63..780de9051 100644
--- a/gtsam_unstable/slam/CMakeLists.txt
+++ b/gtsam_unstable/slam/CMakeLists.txt
@@ -5,7 +5,11 @@ set (slam_excluded_headers #"")
 
 file(GLOB slam_headers "*.h")
 list(REMOVE_ITEM slam_headers ${slam_excluded_headers})
-install(FILES ${slam_headers} DESTINATION include/gtsam_unstable/slam)
+if(QNX)
+    install(FILES ${slam_headers} DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/gtsam_unstable/slam)
+else()
+    install(FILES ${slam_headers} DESTINATION include/gtsam_unstable/slam)
+endif()
 
 # Add all tests
 add_subdirectory(tests)
diff --git a/tests/testSerializationSlam.cpp b/tests/testSerializationSlam.cpp
index c4170b108..a29485720 100644
--- a/tests/testSerializationSlam.cpp
+++ b/tests/testSerializationSlam.cpp
@@ -634,7 +634,6 @@ TEST(SubgraphSolver, Solves) {
     KeyInfo keyInfo(Ab);
     std::map<Key, Vector> lambda;
     system.build(Ab, keyInfo, lambda);
-
     // Create a perturbed (non-zero) RHS
     const auto xbar = system.Rc1().optimize();  // merely for use in zero below
     auto values_y = VectorValues::Zero(xbar);