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cmake: Clarify comment around exported cmake script

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The `export()` command purely exports a cmake script into the build
directory; it is not related to find_package at all. It is technically
not necessary. The main use case would be a user copying it into their
internal cmake/ dir in their project, and then using `include()`'ing
that file in their cmake.

The `install(EXPORT...` command is what actually generates a cmake
module that is put on the filesystem in a location that can be found by
`find_package` when in config mode.
This commit is contained in:
Mark Mossberg
2019-12-03 22:27:03 +00:00
parent 57cd52b046
commit 588c6577dd
1 changed files with 3 additions and 1 deletions
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4
CMakeLists.txt
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@@ -75,7 +75,8 @@ endif()
set(TARGETS_EXPORT_NAME "${CMAKE_PROJECT_NAME}Targets") set(TARGETS_EXPORT_NAME "${CMAKE_PROJECT_NAME}Targets")
# export targets for find_package config mode # Export cmake script that can be used by downstream project
# via `include()`
export(TARGETS tinyxml2 export(TARGETS tinyxml2
FILE ${CMAKE_BINARY_DIR}/${TARGETS_EXPORT_NAME}.cmake) FILE ${CMAKE_BINARY_DIR}/${TARGETS_EXPORT_NAME}.cmake)
@@ -139,6 +140,7 @@ install(FILES
DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/${CMAKE_PROJECT_NAME} DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/${CMAKE_PROJECT_NAME}
COMPONENT tinyxml2_config) COMPONENT tinyxml2_config)
# Export targets for find_package config mode
install(EXPORT ${TARGETS_EXPORT_NAME} NAMESPACE tinyxml2:: install(EXPORT ${TARGETS_EXPORT_NAME} NAMESPACE tinyxml2::
DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/${CMAKE_PROJECT_NAME} DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/${CMAKE_PROJECT_NAME}
COMPONENT tinyxml2_config) COMPONENT tinyxml2_config)