changes

CMakeLists.txt

@@ -301,8 +301,6 @@ endmacro()
 # the same package twice. This avoids having complex if/else trees to sort out
 # when a particular package is actually needed.
 
-add_definitions(-DALGEBRA_PLUGINS_INCLUDE_ARRAY)
-
 # plugin dependencies
 
 if(ACTS_BUILD_PLUGIN_ACTSVG)

Plugins/Traccc/CMakeLists.txt

@@ -13,7 +13,6 @@ target_link_libraries(
   PUBLIC
     ActsCore
     traccc::core
-    traccc::io
     vecmem::core
     detray::utils
     detray::io

Tests/DownstreamProject/CMakeLists.txt

@@ -12,7 +12,8 @@ find_package(
     PluginLegacy
     PluginTGeo
     PluginCovfie
-    PluginDetray)
+    PluginDetray
+    PluginTraccc)
 
 # place artifacts in GNU-like paths, e.g. binaries in `<build>/bin`
 include(GNUInstallDirs)
@@ -31,7 +32,8 @@ target_link_libraries(
     ActsPluginLegacy
     ActsPluginTGeo
     ActsPluginCovfie
-    ActsPluginDetray)
+    ActsPluginDetray
+    ActsPluginTraccc)
 
 option(DD4HEP "Build with DD4hep" ON)
 if(DD4HEP)

cmake/ActsConfig.cmake.in

@@ -81,6 +81,23 @@ if(PluginGeoModel IN_LIST Acts_COMPONENTS)
   find_dependency(GeoModelIO @GeoModel_VERSION@ CONFIG EXACT)
 endif()
 
+if (PluginCovfie IN_LIST Acts_COMPONENTS)
+  find_dependency(covfie @covfie_VERSION@ CONFIG EXACT)
+endif()
+
+if(PluginDetray IN_LIST Acts_COMPONENTS OR PluginTraccc IN_LIST Acts_COMPONENTS)
+  find_dependency(vecmem @vecmem_VERSION@ CONFIG EXACT)
+  find_dependency(algebra-plugins @algebra-plugins_VERSION@ CONFIG EXACT)
+  find_dependency(detray @detray_VERSION@ CONFIG EXACT)
+endif()
+
+if(PluginTraccc IN_LIST Acts_COMPONENTS)
+  if(NOT @ACTS_USE_SYSTEM_TRACCC@)
+    add_library(traccc_all INTERFACE IMPORTED GLOBAL)
+    target_include_directories(traccc_all INTERFACE "${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_INCLUDEDIR}")
+  endif()
+endif()
+
 # dependencies that we have built ourselves but cannot be
 # straightforwardly handed to cmake
 if(NOT @ACTS_USE_SYSTEM_BOOST@)
@@ -96,16 +113,6 @@ if(PluginPodio IN_LIST Acts_COMPONENTS)
   include(${CMAKE_CURRENT_LIST_DIR}/ActsPodioEdmTargets.cmake)
 endif()
 
-if (PluginCovfie IN_LIST Acts_COMPONENTS)
-  find_dependency(covfie @covfie_VERSION@ CONFIG EXACT)
-endif()
-
-if(PluginDetray IN_LIST Acts_COMPONENTS)
-  find_dependency(vecmem @vecmem_VERSION@ CONFIG EXACT)
-  find_dependency(algebra-plugins @algebra-plugins_VERSION@ CONFIG EXACT)
-  find_dependency(detray @detray_VERSION@ CONFIG EXACT)
-endif()
-
 # load **all** available components. we can not just include the requested
 # components since there can be interdependencies between them.
 if(NOT Acts_FIND_QUIETLY)

thirdparty/algebra-plugins/CMakeLists.txt

@@ -14,6 +14,8 @@ message( STATUS "Building algebra-plugins as part of the Acts project" )
 
 FetchContent_Declare( AlgebraPlugins ${ACTS_ALGEBRAPLUGINS_SOURCE} )
 
+add_definitions(-DALGEBRA_PLUGINS_INCLUDE_ARRAY)
+
 # Options used in the build of Algebra Plugins.
 set(ALGEBRA_PLUGINS_BUILD_TESTING FALSE CACHE BOOL
    "Turn off the build of the Algebra Plugins unit tests")

thirdparty/traccc/CMakeLists.txt

@@ -41,6 +41,8 @@ set( TRACCC_BUILD_TESTING OFF CACHE BOOL
     "Turn off the build of the Traccc unit tests" ) 
 set( TRACCC_BUILD_EXAMPLES OFF CACHE BOOL
     "Turn off the build of the Traccc examples" ) 
+set ( TRACCC_BUILD_IO OFF CACHE BOOL
+    "Turn off the build of Traccc io" )
 
 # Now set up its build.
 FetchContent_MakeAvailable( traccc )