From 0dd83ad18b5eefebf89f39b467b6aea0bf112881 Mon Sep 17 00:00:00 2001
From: Saleem Abdulrasool <compnerd@compnerd.org>
Date: Thu, 23 Nov 2023 19:28:40 -0800
Subject: [PATCH] build: simplify the build rules (NFC)

The minimum version of CMake is set to 3.19.6.  Remove the workarounds
for the older releases of CMake allowing us to simplify the build rules.
---
 CMakeLists.txt | 39 +++++++--------------------------------
 1 file changed, 7 insertions(+), 32 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 3ab9fb9b3..578c69663 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -12,44 +12,19 @@ list(APPEND CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/cmake/modules)
 
 project(SwiftDriver LANGUAGES C Swift)
 
-set(SWIFT_VERSION 5)
-set(CMAKE_Swift_LANGUAGE_VERSION ${SWIFT_VERSION})
-if(CMAKE_VERSION VERSION_LESS 3.16)
-    add_compile_options($<$<COMPILE_LANGUAGE:Swift>:-swift-version$<SEMICOLON>${SWIFT_VERSION}>)
-    set(CMAKE_LINK_LIBRARY_FLAG "-l")
-endif()
-
-# ensure Swift compiler can find _CSwiftScan
-add_compile_options($<$<COMPILE_LANGUAGE:Swift>:-I$<SEMICOLON>${CMAKE_CURRENT_SOURCE_DIR}/Sources/CSwiftScan/include>)
-
+set(CMAKE_Swift_LANGUAGE_VERSION 5)
 set(CMAKE_Swift_MODULE_DIRECTORY ${CMAKE_BINARY_DIR}/swift)
 
-if(CMAKE_VERSION VERSION_LESS 3.16 AND CMAKE_SYSTEM_NAME STREQUAL Windows)
-  set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin)
-  set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin)
-else()
-  set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib)
-  set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib)
-endif()
+set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib)
+set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib)
 set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin)
 
-option(BUILD_SHARED_LIBS "Build shared libraries by default" YES)
-
 set(CMAKE_MACOSX_RPATH YES)
-if(CMAKE_VERSION VERSION_LESS 3.17)
-  if(NOT CMAKE_SYSTEM_NAME STREQUAL Windows)
-    set(CMAKE_EXECUTABLE_RUNTIME_Swift_FLAG "-Xlinker -rpath -Xlinker ")
-    set(CMAKE_SHARED_LIBRARY_RUNTIME_Swift_FLAG "-Xlinker -rpath -Xlinker ")
 
-    if(CMAKE_SYSTEM_NAME STREQUAL Darwin)
-      set(CMAKE_EXECUTABLE_RUNTIME_Swift_FLAG_SEP "")
-      set(CMAKE_SHARED_LIBRARY_RUNTIME_Swift_FLAG_SEP "")
-    else()
-      set(CMAKE_EXECUTABLE_RUNTIME_Swift_FLAG_SEP ":")
-      set(CMAKE_SHARED_LIBRARY_RUNTIME_Swift_FLAG_SEP ":")
-    endif()
-  endif()
-endif()
+# ensure Swift compiler can find _CSwiftScan
+add_compile_options($<$<COMPILE_LANGUAGE:Swift>:-I$<SEMICOLON>${CMAKE_CURRENT_SOURCE_DIR}/Sources/CSwiftScan/include>)
+
+option(BUILD_SHARED_LIBS "Build shared libraries by default" YES)
 
 find_package(TSC CONFIG REQUIRED)