From https://github.com/libevent/libevent/commit/7870e85ecbfa09d79c66d382301ecd0a1e441c19
From: kurtliu <kurtliu@tencent.com>
Date: Wed, 24 Jan 2024 13:19:23 +0800
Subject: [PATCH] install DESTINATION use CMAKE_INSTALL_<dir>

--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1683,12 +1683,12 @@ configure_file(${PROJECT_SOURCE_DIR}/cmake/LibeventConfigVersion.cmake.in
 
 # Install compat headers
 install(FILES ${HDR_COMPAT}
-        DESTINATION "include"
+        DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}"
         COMPONENT dev)
 
 # Install public headers
 install(FILES ${HDR_PUBLIC}
-        DESTINATION "include/event2"
+        DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}/event2"
         COMPONENT dev)
 
 # Install the configs.
@@ -1716,7 +1716,7 @@ endif()
 # Install the scripts.
 install(PROGRAMS
        ${CMAKE_CURRENT_SOURCE_DIR}/event_rpcgen.py
-       DESTINATION "bin"
+       DESTINATION "${CMAKE_INSTALL_BINDIR}"
        COMPONENT runtime)
 
 # Create documents with doxygen.
--- a/cmake/AddEventLibrary.cmake
+++ b/cmake/AddEventLibrary.cmake
@@ -36,9 +36,9 @@ endmacro()
 macro(export_install_target TYPE LIB_NAME)
     if("${LIB_NAME}" STREQUAL "event")
         install(TARGETS "${LIB_NAME}_${TYPE}"
-            LIBRARY DESTINATION "lib" COMPONENT lib
-            ARCHIVE DESTINATION "lib" COMPONENT lib
-            RUNTIME DESTINATION "lib" COMPONENT lib
+            LIBRARY DESTINATION "${CMAKE_INSTALL_LIBDIR}" COMPONENT lib
+            ARCHIVE DESTINATION "${CMAKE_INSTALL_LIBDIR}" COMPONENT lib
+            RUNTIME DESTINATION "${CMAKE_INSTALL_LIBDIR}" COMPONENT lib
             COMPONENT dev
         )
     else()
@@ -62,9 +62,9 @@ macro(export_install_target TYPE LIB_NAME)
         )
         install(TARGETS "${LIB_NAME}_${TYPE}"
             EXPORT LibeventTargets-${TYPE}
-            LIBRARY DESTINATION "lib" COMPONENT lib
-            ARCHIVE DESTINATION "lib" COMPONENT lib
-            RUNTIME DESTINATION "lib" COMPONENT lib
+            LIBRARY DESTINATION "${CMAKE_INSTALL_LIBDIR}" COMPONENT lib
+            ARCHIVE DESTINATION "${CMAKE_INSTALL_LIBDIR}" COMPONENT lib
+            RUNTIME DESTINATION "${CMAKE_INSTALL_LIBDIR}" COMPONENT lib
             COMPONENT dev
         )
     endif()
@@ -169,7 +169,7 @@ macro(add_event_library LIB_NAME)
         if (NOT WIN32)
             install(FILES
                 "$<TARGET_FILE_DIR:${LIB_NAME}_shared>/${LIB_LINK_NAME}"
-                DESTINATION "lib"
+                DESTINATION "${CMAKE_INSTALL_LIBDIR}"
                 COMPONENT lib)
         endif()
     endif()