fix: duplicate target names removed

tests/test_cmake_build/CMakeLists.txt

 add_custom_target(test_cmake_build)
 
 function(pybind11_add_build_test name)
-  cmake_parse_arguments(ARG "INSTALL" "" "" ${ARGN})
+  cmake_parse_arguments(PARSE_ARGV 1 ARG "INSTALL" "" "")
 
   set(build_options
       "-DCMAKE_PREFIX_PATH=${pybind11_BINARY_DIR}/mock_install"
@@ -14,10 +14,12 @@ function(pybind11_add_build_test name)
 
   if(NOT ARG_INSTALL)
     list(APPEND build_options "-DPYBIND11_PROJECT_DIR=${pybind11_SOURCE_DIR}")
+  else()
+    list(APPEND build_options "-DCMAKE_PREFIX_PATH=${pybind11_BINARY_DIR}/mock_install")
   endif()
 
   add_custom_target(
-    test_${name}
+    test_build_${name}
     ${CMAKE_CTEST_COMMAND}
     --build-and-test
     "${CMAKE_CURRENT_SOURCE_DIR}/${name}"
@@ -32,13 +34,13 @@ function(pybind11_add_build_test name)
     --build-makeprogram
     ${CMAKE_MAKE_PROGRAM}
     --build-target
-    check
+    check_${name}
     --build-options
     ${build_options})
   if(ARG_INSTALL)
-    add_dependencies(test_${name} mock_install)
+    add_dependencies(test_build_${name} mock_install)
   endif()
-  add_dependencies(test_cmake_build test_${name})
+  add_dependencies(test_cmake_build test_build_${name})
 endfunction()
 
 pybind11_add_build_test(subdirectory_function)

tests/test_cmake_build/installed_embed/CMakeLists.txt

@@ -11,15 +11,16 @@ endif()
 
 project(test_installed_embed CXX)
 
-set(CMAKE_MODULE_PATH "")
 find_package(pybind11 CONFIG REQUIRED)
 message(STATUS "Found pybind11 v${pybind11_VERSION}: ${pybind11_INCLUDE_DIRS}")
 
-add_executable(test_cmake_build ../embed.cpp)
-target_link_libraries(test_cmake_build PRIVATE pybind11::embed)
+add_executable(test_installed_embed ../embed.cpp)
+target_link_libraries(test_installed_embed PRIVATE pybind11::embed)
+set_target_properties(test_installed_embed PROPERTIES OUTPUT_NAME test_cmake_build)
 
 # Do not treat includes from IMPORTED target as SYSTEM (Python headers in pybind11::embed).
 # This may be needed to resolve header conflicts, e.g. between Python release and debug headers.
-set_target_properties(test_cmake_build PROPERTIES NO_SYSTEM_FROM_IMPORTED ON)
+set_target_properties(test_installed_embed PROPERTIES NO_SYSTEM_FROM_IMPORTED ON)
 
-add_custom_target(check $<TARGET_FILE:test_cmake_build> ${PROJECT_SOURCE_DIR}/../test.py)
+add_custom_target(check_installed_embed $<TARGET_FILE:test_installed_embed>
+                                        ${PROJECT_SOURCE_DIR}/../test.py)

tests/test_cmake_build/installed_function/CMakeLists.txt

@@ -9,22 +9,21 @@ else()
   cmake_policy(VERSION 3.18)
 endif()
 
-project(test_installed_module CXX)
-
-set(CMAKE_MODULE_PATH "")
+project(test_installed_function CXX)
 
 find_package(pybind11 CONFIG REQUIRED)
 message(
   STATUS "Found pybind11 v${pybind11_VERSION} ${pybind11_VERSION_TYPE}: ${pybind11_INCLUDE_DIRS}")
 
-pybind11_add_module(test_cmake_build SHARED NO_EXTRAS ../main.cpp)
+pybind11_add_module(test_installed_function SHARED NO_EXTRAS ../main.cpp)
+set_target_properties(test_installed_function PROPERTIES OUTPUT_NAME test_cmake_build)
 
 add_custom_target(
-  check
+  check_installed_function
   ${CMAKE_COMMAND}
   -E
   env
-  PYTHONPATH=$<TARGET_FILE_DIR:test_cmake_build>
+  PYTHONPATH=$<TARGET_FILE_DIR:test_installed_function>
   ${PYTHON_EXECUTABLE}
   ${PROJECT_SOURCE_DIR}/../test.py
   ${PROJECT_NAME})

tests/test_cmake_build/installed_target/CMakeLists.txt

@@ -11,29 +11,28 @@ endif()
 
 project(test_installed_target CXX)
 
-set(CMAKE_MODULE_PATH "")
-
 find_package(pybind11 CONFIG REQUIRED)
 message(STATUS "Found pybind11 v${pybind11_VERSION}: ${pybind11_INCLUDE_DIRS}")
 
-add_library(test_cmake_build MODULE ../main.cpp)
+add_library(test_installed_target MODULE ../main.cpp)
 
-target_link_libraries(test_cmake_build PRIVATE pybind11::module)
+target_link_libraries(test_installed_target PRIVATE pybind11::module)
+set_target_properties(test_installed_target PROPERTIES OUTPUT_NAME test_cmake_build)
 
 # make sure result is, for example, test_installed_target.so, not libtest_installed_target.dylib
-set_target_properties(test_cmake_build PROPERTIES PREFIX "${PYTHON_MODULE_PREFIX}"
+set_target_properties(test_installed_target PROPERTIES PREFIX "${PYTHON_MODULE_PREFIX}"
                                                        SUFFIX "${PYTHON_MODULE_EXTENSION}")
 
 # Do not treat includes from IMPORTED target as SYSTEM (Python headers in pybind11::module).
 # This may be needed to resolve header conflicts, e.g. between Python release and debug headers.
-set_target_properties(test_cmake_build PROPERTIES NO_SYSTEM_FROM_IMPORTED ON)
+set_target_properties(test_installed_target PROPERTIES NO_SYSTEM_FROM_IMPORTED ON)
 
 add_custom_target(
-  check
+  check_installed_target
   ${CMAKE_COMMAND}
   -E
   env
-  PYTHONPATH=$<TARGET_FILE_DIR:test_cmake_build>
+  PYTHONPATH=$<TARGET_FILE_DIR:test_installed_target>
   ${PYTHON_EXECUTABLE}
   ${PROJECT_SOURCE_DIR}/../test.py
   ${PROJECT_NAME})

tests/test_cmake_build/subdirectory_embed/CMakeLists.txt

@@ -19,10 +19,12 @@ set(PYBIND11_EXPORT_NAME test_export)
 add_subdirectory(${PYBIND11_PROJECT_DIR} pybind11)
 
 # Test basic target functionality
-add_executable(test_cmake_build ../embed.cpp)
-target_link_libraries(test_cmake_build PRIVATE pybind11::embed)
+add_executable(test_subdirectory_embed ../embed.cpp)
+target_link_libraries(test_subdirectory_embed PRIVATE pybind11::embed)
+set_target_properties(test_subdirectory_embed PROPERTIES OUTPUT_NAME test_cmake_build)
 
-add_custom_target(check $<TARGET_FILE:test_cmake_build> ${PROJECT_SOURCE_DIR}/../test.py)
+add_custom_target(check_subdirectory_embed $<TARGET_FILE:test_subdirectory_embed>
+                                           ${PROJECT_SOURCE_DIR}/../test.py)
 
 # Test custom export group -- PYBIND11_EXPORT_NAME
 add_library(test_embed_lib ../embed.cpp)

tests/test_cmake_build/subdirectory_function/CMakeLists.txt

@@ -9,17 +9,18 @@ else()
   cmake_policy(VERSION 3.18)
 endif()
 
-project(test_subdirectory_module CXX)
+project(test_subdirectory_function CXX)
 
-add_subdirectory(${PYBIND11_PROJECT_DIR} pybind11)
-pybind11_add_module(test_cmake_build THIN_LTO ../main.cpp)
+add_subdirectory("${PYBIND11_PROJECT_DIR}" pybind11)
+pybind11_add_module(test_subdirectory_function THIN_LTO ../main.cpp)
+set_target_properties(test_subdirectory_function PROPERTIES OUTPUT_NAME test_cmake_build)
 
 add_custom_target(
-  check
+  check_subdirectory_function
   ${CMAKE_COMMAND}
   -E
   env
-  PYTHONPATH=$<TARGET_FILE_DIR:test_cmake_build>
+  PYTHONPATH=$<TARGET_FILE_DIR:test_subdirectory_function>
   ${PYTHON_EXECUTABLE}
   ${PROJECT_SOURCE_DIR}/../test.py
   ${PROJECT_NAME})

tests/test_cmake_build/subdirectory_target/CMakeLists.txt

@@ -13,20 +13,21 @@ project(test_subdirectory_target CXX)
 
 add_subdirectory(${PYBIND11_PROJECT_DIR} pybind11)
 
-add_library(test_cmake_build MODULE ../main.cpp)
+add_library(test_subdirectory_target MODULE ../main.cpp)
+set_target_properties(test_subdirectory_target PROPERTIES OUTPUT_NAME test_cmake_build)
 
-target_link_libraries(test_cmake_build PRIVATE pybind11::module)
+target_link_libraries(test_subdirectory_target PRIVATE pybind11::module)
 
 # make sure result is, for example, test_installed_target.so, not libtest_installed_target.dylib
-set_target_properties(test_cmake_build PROPERTIES PREFIX "${PYTHON_MODULE_PREFIX}"
+set_target_properties(test_subdirectory_target PROPERTIES PREFIX "${PYTHON_MODULE_PREFIX}"
                                                           SUFFIX "${PYTHON_MODULE_EXTENSION}")
 
 add_custom_target(
-  check
+  check_subdirectory_target
   ${CMAKE_COMMAND}
   -E
   env
-  PYTHONPATH=$<TARGET_FILE_DIR:test_cmake_build>
+  PYTHONPATH=$<TARGET_FILE_DIR:test_subdirectory_target>
   ${PYTHON_EXECUTABLE}
   ${PROJECT_SOURCE_DIR}/../test.py
   ${PROJECT_NAME})