$OpenBSD: patch-CMakeLists_txt,v 1.3 2021/06/29 03:48:22 thfr Exp $

Index: CMakeLists.txt
--- CMakeLists.txt.orig
+++ CMakeLists.txt
@@ -100,6 +100,7 @@ if(UNIX AND NOT APPLE) # i.e. Linux
 
     if(BUILD_WSI_XCB_SUPPORT)
         find_package(XCB REQUIRED)
+        include_directories(${XCB_INCLUDE_DIR})
     endif()
 
     if(BUILD_WSI_XLIB_SUPPORT)
