TriBITSPub · bartlettroscoe · Feb 21, 2025 · Feb 17, 2025 · Feb 21, 2025 · Feb 21, 2025
diff --git a/test/core/ExamplesUnitTests/TribitsExampleProject_Tests.cmake b/test/core/ExamplesUnitTests/TribitsExampleProject_Tests.cmake
@@ -313,7 +313,7 @@ function(TribitsExampleProject_ALL_ST_NoFortran  sharedOrStatic  serialOrMpi)
         "WithSubpackages_MPI_EXEC_MAX_NUMPROCS = '${MPI_EXEC_MAX_NUMPROCS}'"
         "WithSubpackages_MPI_EXEC_NUMPROCS_FLAG = '${MPI_EXEC_NUMPROCS_FLAG}'"
         "WithSubpackages_FOUND = '1'"
-        "WithSubpackages::all_libs  INTERFACE_LINK_LIBRARIES: 'WithSubpackagesA::pws_a[;]WithSubpackagesB::pws_b[;]WithSubpackagesC::pws_c'"
+        "WithSubpackages::all_libs  INTERFACE_LINK_LIBRARIES: 'WithSubpackagesA::pws_a[;]WithSubpackagesA::all_libs[;]WithSubpackagesB::pws_b[;]WithSubpackagesB::all_libs[;]WithSubpackagesC::pws_c[;]WithSubpackagesC::all_libs'"
         "-- Configuring done"
         "-- Generating done"
       ALWAYS_FAIL_ON_NONZERO_RETURN
@@ -399,7 +399,7 @@ function(TribitsExampleProject_ALL_ST_NoFortran  sharedOrStatic  serialOrMpi)
         "WithSubpackages_MPI_EXEC_MAX_NUMPROCS = '${MPI_EXEC_MAX_NUMPROCS}'"
         "WithSubpackages_MPI_EXEC_NUMPROCS_FLAG = '${MPI_EXEC_NUMPROCS_FLAG}'"
         "WithSubpackages_FOUND = '1'"
-        "WithSubpackages::all_libs  INTERFACE_LINK_LIBRARIES: 'WithSubpackagesA::pws_a[;]WithSubpackagesB::pws_b[;]WithSubpackagesC::pws_c'"
+        "WithSubpackages::all_libs  INTERFACE_LINK_LIBRARIES: 'WithSubpackagesA::pws_a[;]WithSubpackagesA::all_libs[;]WithSubpackagesB::pws_b[;]WithSubpackagesB::all_libs[;]WithSubpackagesC::pws_c[;]WithSubpackagesC::all_libs'"
       ALWAYS_FAIL_ON_NONZERO_RETURN
 
     TEST_8
@@ -1303,7 +1303,7 @@ tribits_add_advanced_test( TribitsExampleProject_ALL_ST_NoFortran_Ninja
         -P ${CMAKE_CURRENT_SOURCE_DIR}/RunDummyPackageClientBulid.cmake
     PASS_REGULAR_EXPRESSION_ALL
       "WithSubpackages_INSTALL_DIR = '.*/TriBITS_TribitsExampleProject_ALL_ST_NoFortran_Ninja/install'"
-      "WithSubpackages::all_libs  INTERFACE_LINK_LIBRARIES: 'WithSubpackagesA::pws_a[;]WithSubpackagesB::pws_b[;]WithSubpackagesC::pws_c'"
+      "WithSubpackages::all_libs  INTERFACE_LINK_LIBRARIES: 'WithSubpackagesA::pws_a[;]WithSubpackagesA::all_libs[;]WithSubpackagesB::pws_b[;]WithSubpackagesB::all_libs[;]WithSubpackagesC::pws_c[;]WithSubpackagesC::all_libs'"
     ALWAYS_FAIL_ON_NONZERO_RETURN
 
   TEST_6 CMND ninja ARGS -j1 install ${CTEST_BUILD_FLAGS}
@@ -1327,7 +1327,7 @@ tribits_add_advanced_test( TribitsExampleProject_ALL_ST_NoFortran_Ninja
       PASS_REGULAR_EXPRESSION_ALL
         "Calling: find_package[(]WithSubpackages REQUIRED COMPONENTS  OPTIONAL_COMPONENTS  [)]"
         "WithSubpackages_FOUND = '1'"
-        "WithSubpackages::all_libs  INTERFACE_LINK_LIBRARIES: 'WithSubpackagesA::pws_a[;]WithSubpackagesB::pws_b[;]WithSubpackagesC::pws_c'"
+        "WithSubpackages::all_libs  INTERFACE_LINK_LIBRARIES: 'WithSubpackagesA::pws_a[;]WithSubpackagesA::all_libs[;]WithSubpackagesB::pws_b[;]WithSubpackagesB::all_libs[;]WithSubpackagesC::pws_c[;]WithSubpackagesC::all_libs'"
       ALWAYS_FAIL_ON_NONZERO_RETURN
 
   TEST_8 CMND ninja ARGS -j1 package_source
@@ -1591,7 +1591,12 @@ tribits_add_advanced_test( TribitsExampleProject_ALL_ST
       "Configuring done"
       "Generating done"
       "Build files have been written to: .*ExamplesUnitTests/TriBITS_TribitsExampleProject_ALL_ST"
-  TEST_1 CMND make
+  TEST_1
+    MESSAGE "Grep MixedLangTargets.cmake to ensure INTERFACE library mixedlang_vector in all_libs"
+    CMND grep ARGS -A 1 "set_target_properties.MixedLang::all_libs PROPERTIES" cmake_packages/MixedLang/MixedLangTargets.cmake
+    PASS_REGULAR_EXPRESSION_ALL
+      "INTERFACE_LINK_LIBRARIES .MixedLang::mixedlang_vector[;]MixedLang::mixedlang."
+  TEST_2 CMND make
     MESSAGE "Build the default 'all' target using raw 'make'"
     ARGS ${CTEST_BUILD_FLAGS}
     PASS_REGULAR_EXPRESSION_ALL
@@ -1600,7 +1605,7 @@ tribits_add_advanced_test( TribitsExampleProject_ALL_ST
       "Built target pws_a"
       "Built target pws_b"
       "Built target pws_c"
-  TEST_2 CMND ${CMAKE_CTEST_COMMAND} ARGS -VV
+  TEST_3 CMND ${CMAKE_CTEST_COMMAND} ARGS -VV
     MESSAGE "Run all the tests with raw 'ctest'"
     PASS_REGULAR_EXPRESSION_ALL
       "SimpleCxx_HelloWorldTests${TEST_MPI_1_SUFFIX} .* Passed"

diff --git a/tribits/CHANGELOG.md b/tribits/CHANGELOG.md
@@ -2,6 +2,12 @@
 ChangeLog for TriBITS
 ----------------------------------------
 
+## 2025-02-17:
+
+* **Added:** Added support for header-only libraries with
+  `tribits_add_library()` with new keyword `HEADERONLY`.  See
+  updated documentation.
+
 ## 2024-10-08:
 
 * **Changed:** The TriBITS framework find operation for

diff --git a/tribits/core/package_arch/TribitsAddLibrary.cmake b/tribits/core/package_arch/TribitsAddLibrary.cmake
@@ -35,7 +35,7 @@ include(TribitsSetAndIncDirs)
 #     [HEADERS <h0> <h1> ...]
 #     [HEADERS_INSTALL_SUBDIR <headerssubdir>]
 #     [NOINSTALLHEADERS <nih0> <hih1> ...]
-#     [SOURCES <src0> <src1> ...]
+#     [SOURCES <src0> <src1> ...|HEADERONLY]
 #     [DEPLIBS <deplib0> <deplib1> ...]
 #     [IMPORTEDLIBS <ideplib0> <ideplib1> ...]
 #     [STATIC|SHARED]
@@ -150,6 +150,12 @@ include(TribitsSetAndIncDirs)
 #     if, for example, ``-fPIC`` is specified).  So be careful to use
 #     ``STATIC`` in all downstream libraries!
 #
+#   ``HEADERONLY``
+#
+#     If passed in, then the ``<libTargetName>`` library target will be
+#     declared ``INTERFACE`` and the ``SOURCES`` argument must be empty.  This
+#     is used to create a header-only library.
+#
 #   ``TESTONLY``
 #
 #     If passed in, then ``<libTargetName>`` will **not** be added to
@@ -319,7 +325,7 @@ function(tribits_add_library  LIBRARY_NAME_IN)
     #prefix
     PARSE
     #Options    
-    "STATIC;SHARED;TESTONLY;NO_INSTALL_LIB_OR_HEADERS;CUDALIBRARY"
+    "STATIC;SHARED;HEADERONLY;TESTONLY;NO_INSTALL_LIB_OR_HEADERS;CUDALIBRARY"
     #one_value_keywords
     ""
     #mulit_value_keywords
@@ -369,27 +375,39 @@ function(tribits_add_library  LIBRARY_NAME_IN)
       add_definitions(${PARSE_DEFINES})
     endif()
 
+    if (PARSE_HEADERONLY)
+      set(tribitsAddLibraryIncludeDirsMode "INTERFACE")
+    else()
+      set(tribitsAddLibraryIncludeDirsMode "PUBLIC")
+    endif()
+
+    set(STATIC_KEYWORD "")
+    set(SHARED_KEYWORD "")
+
     if (PARSE_STATIC)
       set(STATIC_KEYWORD "STATIC")
-    else()
-      set(STATIC_KEYWORD "")
     endif()
 
     if (PARSE_SHARED)
       set(SHARED_KEYWORD "SHARED")
-    else()
-      set(SHARED_KEYWORD "")
     endif()
 
     if (NOT PARSE_CUDALIBRARY)
-      add_library(
-        ${LIBRARY_NAME}
-        ${STATIC_KEYWORD}
-        ${SHARED_KEYWORD}
-        ${PARSE_HEADERS}
-        ${PARSE_NOINSTALLHEADERS}
-        ${PARSE_SOURCES}
-        )
+      if (PARSE_HEADERONLY)
+        add_library(
+          ${LIBRARY_NAME}
+	  INTERFACE
+          )
+      else()
+        add_library(
+          ${LIBRARY_NAME}
+          ${STATIC_KEYWORD}
+          ${SHARED_KEYWORD}
+          ${PARSE_HEADERS}
+          ${PARSE_NOINSTALLHEADERS}
+          ${PARSE_SOURCES}
+          )
+      endif()
     else()
       cuda_add_library(
         ${LIBRARY_NAME}
@@ -433,30 +451,35 @@ function(tribits_add_library  LIBRARY_NAME_IN)
 
     # DEPLIBS
     foreach(depLib ${PARSE_DEPLIBS})
-      target_link_libraries(${LIBRARY_NAME} PUBLIC "${LIBRARY_NAME_PREFIX}${depLib}")
+      target_link_libraries(${LIBRARY_NAME}
+	${tribitsAddLibraryIncludeDirsMode} "${LIBRARY_NAME_PREFIX}${depLib}")
     endforeach()
     # ${PACKAGE_NAME}_LIBRARIES
-    target_link_libraries(${LIBRARY_NAME} PUBLIC ${${PACKAGE_NAME}_LIBRARIES})
+    target_link_libraries(${LIBRARY_NAME}
+      ${tribitsAddLibraryIncludeDirsMode} ${${PACKAGE_NAME}_LIBRARIES})
     # ${PACKAGE_NAME}_LIB_ENABLED_DEPENDENCIES
     foreach(depPkg IN LISTS ${PACKAGE_NAME}_LIB_ENABLED_DEPENDENCIES)
-      target_link_libraries(${LIBRARY_NAME} PUBLIC ${depPkg}::all_libs)
+      target_link_libraries(${LIBRARY_NAME}
+	${tribitsAddLibraryIncludeDirsMode} ${depPkg}::all_libs)
     endforeach()
     # ${PACKAGE_NAME}_TEST_ENABLED_DEPENDENCIES (TESTONLY lib)
     if (PARSE_TESTONLY)
       foreach(depPkg IN LISTS ${PACKAGE_NAME}_TEST_ENABLED_DEPENDENCIES)
-        target_link_libraries(${LIBRARY_NAME} PUBLIC ${depPkg}::all_libs)
+        target_link_libraries(${LIBRARY_NAME}
+	  ${tribitsAddLibraryIncludeDirsMode} ${depPkg}::all_libs)
       endforeach()
     endif()
     # IMPORTEDLIBS
     foreach(importedLib ${PARSE_IMPORTEDLIBS})
-      target_link_libraries(${LIBRARY_NAME} PUBLIC "${importedLib}")
+      target_link_libraries(${LIBRARY_NAME}
+	${tribitsAddLibraryIncludeDirsMode} "${importedLib}")
     endforeach()
 
     # ToDo: #63: Above, allow for other link visibilities other than 'PUBLIC'!
 
     if (${PROJECT_NAME}_CXX_STANDARD_FEATURE)
-      target_compile_features(${LIBRARY_NAME} PUBLIC
-        "${${PROJECT_NAME}_CXX_STANDARD_FEATURE}")
+      target_compile_features(${LIBRARY_NAME}
+	${tribitsAddLibraryIncludeDirsMode} "${${PROJECT_NAME}_CXX_STANDARD_FEATURE}")
     endif()
 
     # Add to the install target
@@ -510,7 +533,8 @@ function(tribits_add_library  LIBRARY_NAME_IN)
     foreach (includeDir IN LISTS INCLUDE_DIRS_CURRENT)
       list(APPEND buildInterfaceIncludeDirs "$<BUILD_INTERFACE:${includeDir}>")
     endforeach()
-    target_include_directories( ${LIBRARY_NAME} PUBLIC ${buildInterfaceIncludeDirs} )
+    target_include_directories( ${LIBRARY_NAME}
+      ${tribitsAddLibraryIncludeDirsMode} ${buildInterfaceIncludeDirs} )
 
     # Add ALIAS library <PackageName>::<libname>
     add_library(${PACKAGE_NAME}::${LIBRARY_NAME} ALIAS ${LIBRARY_NAME})

diff --git a/tribits/core/package_arch/TribitsPackageMacros.cmake b/tribits/core/package_arch/TribitsPackageMacros.cmake
@@ -669,9 +669,9 @@ macro(tribits_package_postprocess_common)
 
   tribits_package_create_all_libs_interface_library()
 
-  if (${PROJECT_NAME}_ENABLE_INSTALL_CMAKE_CONFIG_FILES)
-    # Create the configure file so external projects can find packages with a
-    # call to find_package(<package_name>).
+  if (${PROJECT_NAME}_ENABLE_INSTALL_CMAKE_CONFIG_FILES
+      AND (NOT ${PROJECT_NAME}_ENABLE_INSTALLATION_TESTING)
+    )
     tribits_write_package_client_export_files(${PACKAGE_NAME})
   endif()
 
@@ -689,7 +689,7 @@ macro(tribits_package_create_all_libs_interface_library)
 
     # Find all of the non-TESTONLY library targets
     tribits_get_all_build_targets_including_in_subdirs("${CMAKE_CURRENT_SOURCE_DIR}"
-      "STATIC_LIBRARY;SHARED_LIBRARY"
+      "STATIC_LIBRARY;SHARED_LIBRARY;INTERFACE_LIBRARY"
       allPackageBuildableLibTargetsList )
     #print_var(allPackageBuildableLibTargetsList)
     set(packageLibsInAllLibsList)

diff --git a/tribits/examples/TribitsExampleProject/packages/mixed_lang/src/CMakeLists.txt b/tribits/examples/TribitsExampleProject/packages/mixed_lang/src/CMakeLists.txt
@@ -1,5 +1,6 @@
 tribits_configure_file(${PACKAGE_NAME}_config.h)
 
+add_subdirectory(vector)
 
 set(HEADERS "")
 set(SOURCES "")
@@ -26,4 +27,5 @@ tribits_add_library(
   mixedlang
   HEADERS ${HEADERS}
   SOURCES ${SOURCES}
+  DEPLIBS mixedlang_vector
   )
diff --git a/tribits/examples/TribitsExampleProject/packages/mixed_lang/src/vector/CMakeLists.txt b/tribits/examples/TribitsExampleProject/packages/mixed_lang/src/vector/CMakeLists.txt
@@ -0,0 +1,8 @@
+tribits_include_directories(${CMAKE_CURRENT_SOURCE_DIR})
+
+tribits_add_library(
+  mixedlang_vector
+  HEADERONLY
+  HEADERS Vector_Lite.hh
+  HEADERS_INSTALL_SUBDIR vector
+  )
diff --git a/...ct/packages/mixed_lang/src/Vector_Lite.hh → ...ages/mixed_lang/src/vector/Vector_Lite.hh b/...ct/packages/mixed_lang/src/Vector_Lite.hh → ...ages/mixed_lang/src/vector/Vector_Lite.hh