From d414928a5a9770346aea7f4138a5b9bb45a3c082 Mon Sep 17 00:00:00 2001
From: wqking <wqking@outlook.com>
Date: Wed, 8 Jun 2022 08:53:45 +0800
Subject: [PATCH] If CMAKE_INSTALL_INCLUDEDIR is not set, set it to "include"

---
 CMakeLists.txt | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index acdb79d..62116c1 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -4,10 +4,14 @@ project(eventpp VERSION 0.1.2)
 add_library(eventpp INTERFACE)
 set(CMAKE_CXX_STANDARD 11)
 
+if("${CMAKE_INSTALL_INCLUDEDIR}" STREQUAL "")
+	set(CMAKE_INSTALL_INCLUDEDIR include)
+endif()
+
 target_include_directories(
 	eventpp INTERFACE
 	$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
-	$<INSTALL_INTERFACE:include>
+	$<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>
 )
 
 add_library(eventpp::eventpp ALIAS eventpp)