add cmake exported targets

Author: aschier

CMakeLists.txt

@@ -1,6 +1,9 @@
 cmake_minimum_required(VERSION 3.14.0)
+include(CMakePackageConfigHelpers)
+include(GNUInstallDirs)
 
 project(geometry-central)
+set(PROJECT_VERSION 0.1.0)
 
 ### Policy settings
 cmake_policy(SET CMP0054 NEW)   # don't implicitly dereference inside if()
@@ -51,15 +54,16 @@ SET(GC_HAVE_SUITESPARSE ${GC_HAVE_SUITESPARSE} PARENT_SCOPE)
 add_subdirectory(src)
 
 # install
-install(
-  TARGETS geometry-central
-  ARCHIVE DESTINATION lib
-  RUNTIME DESTINATION bin
-  LIBRARY DESTINATION lib)
 
+configure_package_config_file(geometry-central-config.cmake.in ${CMAKE_CURRENT_BINARY_DIR}/geometry-central-config.cmake INSTALL_DESTINATION ${CMAKE_INSTALL_DATAROOTDIR}/geometry-central/cmake)
+write_basic_package_version_file(${CMAKE_CURRENT_BINARY_DIR}/geometry-centralConfigVersion.cmake COMPATIBILITY SameMajorVersion)
+install(TARGETS geometry-central eigen nanort nanoflann happly EXPORT geometry-central-targets ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR})
+
+install(EXPORT geometry-central-targets FILE geometry-centralTargets.cmake DESTINATION ${CMAKE_INSTALL_DATAROOTDIR}/geometry-central/cmake)
+install(FILES ${CMAKE_CURRENT_BINARY_DIR}/geometry-central-config.cmake DESTINATION ${CMAKE_INSTALL_DATAROOTDIR}/geometry-central/cmake)
 install(
   DIRECTORY ${CMAKE_SOURCE_DIR}/include/
-  DESTINATION include
+  DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}
   FILES_MATCHING
   PATTERN "*.h"
   PATTERN "*.ipp")

src/CMakeLists.txt

@@ -175,7 +175,10 @@ SET(HEADERS
 add_library(geometry-central ${SRCS} ${HEADERS})
 
 # Includes from this project
-target_include_directories(geometry-central PUBLIC "${CMAKE_CURRENT_SOURCE_DIR}/../include")
+target_include_directories(geometry-central PUBLIC
+    $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>
+    $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/../include>
+)
 
 # Add all includes and link libraries from dependencies, which were populated in deps/CMakeLists.txt
 target_link_libraries(geometry-central PUBLIC ${GC_DEP_LIBS})