From 2a3e9c11353c182ed2e2205057703b91f593a8c1 Mon Sep 17 00:00:00 2001
From: YR Chen <stevapple@icloud.com>
Date: Sun, 4 Sep 2022 22:42:26 +0800
Subject: [PATCH] Introduce `SWIFT_RUNTIME_RESOURCE_INSTALL_DIR`

a new flag to control the path to Swift headers installation.
---
 CMakeLists.txt | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 2bef26395..4a0949d99 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -124,8 +124,12 @@ endif()
 option(INSTALL_PRIVATE_HEADERS "installs private headers in the same location as the public ones" OFF)
 
 option(ENABLE_SWIFT "enable libdispatch swift overlay" OFF)
+set(SWIFT_RUNTIME_RESOURCE_INSTALL_DIR "" CACHE PATH "path to install swift compiler runtime resources")
 if(ENABLE_SWIFT)
   enable_language(Swift)
+  if(NOT SWIFT_RUNTIME_RESOURCE_INSTALL_DIR)
+    set(SWIFT_RUNTIME_RESOURCE_INSTALL_DIR "${CMAKE_INSTALL_LIBDIR}/swift$<$<NOT:$<BOOL:${BUILD_SHARED_LIBS}>>:_static>")
+  endif()
 endif()
 
 option(ENABLE_THREAD_LOCAL_STORAGE "enable usage of thread local storage via _Thread_local" ON)
@@ -289,9 +293,9 @@ add_compile_definitions($<$<OR:$<COMPILE_LANGUAGE:C>,$<COMPILE_LANGUAGE:CXX>>:HA
 
 if(ENABLE_SWIFT)
   set(INSTALL_TARGET_DIR "${CMAKE_INSTALL_LIBDIR}/swift$<$<NOT:$<BOOL:${BUILD_SHARED_LIBS}>>:_static>/$<LOWER_CASE:${CMAKE_SYSTEM_NAME}>" CACHE PATH "Path where the libraries will be installed")
-  set(INSTALL_DISPATCH_HEADERS_DIR "${CMAKE_INSTALL_LIBDIR}/swift$<$<NOT:$<BOOL:${BUILD_SHARED_LIBS}>>:_static>/dispatch" CACHE PATH "Path where the headers will be installed for libdispatch")
-  set(INSTALL_BLOCK_HEADERS_DIR "${CMAKE_INSTALL_LIBDIR}/swift$<$<NOT:$<BOOL:${BUILD_SHARED_LIBS}>>:_static>/Block" CACHE PATH "Path where the headers will be installed for the blocks runtime")
-  set(INSTALL_OS_HEADERS_DIR "${CMAKE_INSTALL_LIBDIR}/swift$<$<NOT:$<BOOL:${BUILD_SHARED_LIBS}>>:_static>/os" CACHE PATH "Path where the os/ headers will be installed")
+  set(INSTALL_DISPATCH_HEADERS_DIR "${SWIFT_RUNTIME_RESOURCE_INSTALL_DIR}/dispatch" CACHE PATH "Path where the headers will be installed for libdispatch")
+  set(INSTALL_BLOCK_HEADERS_DIR "${SWIFT_RUNTIME_RESOURCE_INSTALL_DIR}/Block" CACHE PATH "Path where the headers will be installed for the blocks runtime")
+  set(INSTALL_OS_HEADERS_DIR "${SWIFT_RUNTIME_RESOURCE_INSTALL_DIR}/os" CACHE PATH "Path where the os/ headers will be installed")
 else()
   set(INSTALL_TARGET_DIR "${CMAKE_INSTALL_LIBDIR}" CACHE PATH "Path where the libraries will be installed")
   set(INSTALL_DISPATCH_HEADERS_DIR "include/dispatch" CACHE PATH "Path where the headers will be installed")