make Foo and Bar OBJECT library

Mizux · Sep 13, 2023 · e385538 · e385538
1 parent 14fca23
commit e385538
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Showing 6 changed files with 48 additions and 15 deletions.
diff --git a/Bar/CMakeLists.txt b/Bar/CMakeLists.txt
@@ -1,4 +1,4 @@
-add_library(Bar "")
+add_library(Bar OBJECT)
 
 target_sources(Bar
   PRIVATE
@@ -11,6 +11,7 @@ target_include_directories(Bar
 target_compile_features(Bar PUBLIC cxx_std_20)
 set_target_properties(Bar PROPERTIES
   VERSION ${PROJECT_VERSION}
+  POSITION_INDEPENDENT_CODE ON
   PUBLIC_HEADER include/bar/Bar.hpp)
 #target_link_libraries(Bar PUBLIC ...)
 add_library(${PROJECT_NAMESPACE}::Bar ALIAS Bar)

diff --git a/Foo/CMakeLists.txt b/Foo/CMakeLists.txt
@@ -1,4 +1,4 @@
-add_library(Foo)
+add_library(Foo OBJECT)
 target_sources(Foo
   PRIVATE
     include/foo/Foo.hpp
@@ -10,6 +10,7 @@ target_include_directories(Foo
 target_compile_features(Foo PUBLIC cxx_std_20)
 set_target_properties(Foo PROPERTIES
   VERSION ${PROJECT_VERSION}
+  POSITION_INDEPENDENT_CODE ON
   PUBLIC_HEADER include/foo/Foo.hpp)
 #target_link_libraries(Foo PUBLIC ...)
 add_library(${PROJECT_NAMESPACE}::Foo ALIAS Foo)

diff --git a/FooBar/CMakeLists.txt b/FooBar/CMakeLists.txt
@@ -1,4 +1,4 @@
-add_library(FooBar "")
+add_library(FooBar OBJECT)
 
 target_sources(FooBar
   PRIVATE
@@ -7,6 +7,8 @@ target_sources(FooBar
 target_include_directories(FooBar
   PUBLIC
     $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
+    $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/../Bar/include>
+    $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/../Foo/include>
     $<INSTALL_INTERFACE:include>)
 target_compile_features(FooBar PUBLIC cxx_std_20)
 set_target_properties(FooBar PROPERTIES
@@ -18,13 +20,9 @@ if(APPLE)
     INSTALL_RPATH "@loader_path")
 elseif(UNIX)
   set_target_properties(FooBar PROPERTIES
+    POSITION_INDEPENDENT_CODE ON
     INSTALL_RPATH "$ORIGIN")
 endif()
-target_link_libraries(FooBar
-  PRIVATE
-  ${PROJECT_NAMESPACE}::Foo
-  ${PROJECT_NAMESPACE}::Bar
-  )
 add_library(${PROJECT_NAMESPACE}::FooBar ALIAS FooBar)
 
 add_subdirectory(tests)

diff --git a/FooBarApp/CMakeLists.txt b/FooBarApp/CMakeLists.txt
@@ -2,6 +2,10 @@ add_executable(FooBarApp)
 target_sources(FooBarApp
   PRIVATE
     src/main.cpp)
+target_include_directories(FooBarApp
+  PRIVATE
+    $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/../FooBar/include>
+)
 target_compile_features(FooBarApp PRIVATE cxx_std_20)
 set_target_properties(FooBarApp PROPERTIES
   VERSION ${PROJECT_VERSION})
@@ -13,7 +17,8 @@ elseif(UNIX AND NOT APPLE)
   set_target_properties(FooBarApp PROPERTIES
     INSTALL_RPATH "$ORIGIN/../${CMAKE_INSTALL_LIBDIR}")
 endif()
-target_link_libraries(FooBarApp PRIVATE ${PROJECT_NAMESPACE}::FooBar)
+target_link_libraries(FooBarApp PRIVATE Full)
+
 add_executable(${PROJECT_NAMESPACE}::FooBarApp ALIAS FooBarApp)
 
 if(BUILD_TESTING)

diff --git a/ci/samples/CMakeLists.txt b/ci/samples/CMakeLists.txt
@@ -11,9 +11,8 @@ set_target_properties(sample PROPERTIES
   CXX_STANDARD_REQUIRED ON
   VERSION ${PROJECT_VERSION})
 target_link_libraries(sample PRIVATE
-  CMakeCpp::Foo
-  CMakeCpp::Bar
-  CMakeCpp::FooBar)
+  CMakeCpp::Full
+)
 
 if(BUILD_TESTING)
   add_test(NAME sample_UT COMMAND sample)

diff --git a/cmake/cpp.cmake b/cmake/cpp.cmake
@@ -92,6 +92,36 @@ endfunction()
 add_subdirectory(Foo)
 add_subdirectory(Bar)
 add_subdirectory(FooBar)
+
+add_library(Full)
+target_include_directories(Full
+  PUBLIC
+    $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/Foo/include>
+    $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/Bar/include>
+    $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/FooBar/include>
+    $<INSTALL_INTERFACE:include>)
+#target_link_libraries(Full INTERFACE
+# Xcode fails to build if library doesn't contains at least one source file.
+if(XCODE)
+  file(GENERATE
+    OUTPUT ${PROJECT_BINARY_DIR}/${PROJECT_NAME}/version.cpp
+    CONTENT "namespace {char* version = \"${PROJECT_VERSION}\";}")
+  target_sources(Full PRIVATE ${PROJECT_BINARY_DIR}/${PROJECT_NAME}/version.cpp)
+endif()
+target_sources(Full PRIVATE
+  $<TARGET_OBJECTS:Bar>
+  $<TARGET_OBJECTS:Foo>
+  $<TARGET_OBJECTS:FooBar>
+)
+add_library(${PROJECT_NAMESPACE}::Full ALIAS Full)
+install(TARGETS Full
+  EXPORT ${PROJECT_NAME}Targets
+  PUBLIC_HEADER DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/foobar
+  ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
+  LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
+  #RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
+  )
+
 add_subdirectory(FooBarApp)
 
 # Install
@@ -138,9 +168,8 @@ function(add_cpp_example FILE_NAME)
   target_include_directories(${EXAMPLE_NAME} PUBLIC ${CMAKE_CURRENT_SOURCE_DIR})
   target_compile_features(${EXAMPLE_NAME} PRIVATE cxx_std_20)
   target_link_libraries(${EXAMPLE_NAME} PRIVATE
-    ${PROJECT_NAMESPACE}::Foo
-    ${PROJECT_NAMESPACE}::Bar
-    ${PROJECT_NAMESPACE}::FooBar)
+    ${PROJECT_NAMESPACE}::Full
+  )
 
   include(GNUInstallDirs)
   install(TARGETS ${EXAMPLE_NAME})