From 61567f4c579aeb2ec1ab8f6bc285de461c7149a8 Mon Sep 17 00:00:00 2001
From: Austin McCartney <amccartney@lanl.gov>
Date: Sat, 15 Jun 2019 09:31:54 -0600
Subject: [PATCH] Fixed CMake prefix generator bug

---
 CMakeLists.txt | 19 ++++++-------------
 1 file changed, 6 insertions(+), 13 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 103ad9a..54f8768 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -10,7 +10,9 @@ cmake_minimum_required(VERSION 3.8)
 #
 if(DEFINED PROJECT_NAME)
   set(subproject ON)
-  set(INSTALL_SUBPROJECTS ON CACHE BOOL "Install subproject dependencies")
+  if(NOT DEFINED INSTALL_SUBPROJECTS)
+    set(INSTALL_SUBPROJECTS ON CACHE BOOL "Install subproject dependencies")
+  endif()
 else()
   set(subproject OFF)
   set_property(GLOBAL PROPERTY USE_FOLDERS ON)
@@ -51,7 +53,7 @@ set(CMAKE_CXX_STANDARD_REQUIRED ON)
 #
 CMAKE_DEPENDENT_OPTION(mio.tests
   "Build the mio tests and integrate with ctest"
-  ${BUILD_TESTING} "NOT subproject" OFF)
+   ON "BUILD_TESTING; NOT subproject" OFF)
 
 #
 # On Windows, so as to be a "good citizen", mio offers two mechanisms to control
@@ -104,7 +106,7 @@ add_library(mio::mio ALIAS mio)
 #
 string(CONCAT prefix
   "$<BUILD_INTERFACE:${CMAKE_CURRENT_LIST_DIR}/include>"
-  "$<INSTALL_INTERFACE:include>")
+  "$<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>")
 
 target_include_directories(mio INTERFACE ${prefix})
 
@@ -199,15 +201,6 @@ if(mio.installation)
   # RPM Package Manager files, Windows NSIS installation wizards,
   # Apple Disk Images (.dmg), etc.
   #
-  # Any system libraries required (runtimes, threading, etc) should be bundled
-  # with the project for this type of installation. The
-  # `InstallRequiredSystemLibraries` CMake module attempts to provide this
-  # functionality in an automated way. Additional libraries may be specified as
-  #
-  # ```cmake
-  # list(APPEND CMAKE_INSTALL_SYSTEM_RUNTIME_LIBS <library>)
-  # ```
-  #
   # A packaged installation can be generated by calling
   #
   # ```sh
@@ -221,7 +214,7 @@ if(mio.installation)
     set(CPACK_PACKAGE_DESCRIPTION_SUMMARY
       "Cross-platform C++11 header-only library for memory mapped file IO")
     set(CMAKE_PROJECT_HOMEPAGE_URL "https://github.com/mandreyel/mio")
-    set(CPACK_RESOURCE_FILE_LICENSE "${CMAKE_CURRENT_SOURCE_DIR}/LICENSE")
+    set(CPACK_RESOURCE_FILE_LICENSE "${PROJECT_SOURCE_DIR}/LICENSE")
     set(CPACK_PACKAGE_VERSION_MAJOR "${PROJECT_VERSION_MAJOR}")
     set(CPACK_PACKAGE_VERSION_MINOR "${PROJECT_VERSION_MINOR}")
     set(CPACK_PACKAGE_VERSION_PATCH "${PROJECT_VERSION_PATCH}")