From 1f08317f3ca30de6df73d6bd6ef83e22c9359de4 Mon Sep 17 00:00:00 2001
From: "Uwe L. Korn" <xhochy@users.noreply.github.com>
Date: Sat, 30 May 2020 07:19:57 +0200
Subject: [PATCH] Add option to install directly in CMAKE_INSTALL_PREFIX

---
 CMakeLists.txt | 18 +++++++++++++++---
 1 file changed, 15 insertions(+), 3 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index e37efcb0..707cf9b5 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -20,6 +20,7 @@ option(MI_BUILD_STATIC      "Build static library" ON)
 option(MI_BUILD_OBJECT      "Build object library" ON)
 option(MI_BUILD_TESTS       "Build test executables" ON)
 option(MI_CHECK_FULL        "Use full internal invariant checking in DEBUG mode (deprecated, use MI_DEBUG_FULL instead)" OFF)
+option(MI_INSTALL_TOPLEVEL  "Install directly into $CMAKE_INSTALL_PREFIX instead of PREFIX/lib/mimalloc-version" OFF)
 
 include("cmake/mimalloc-config-version.cmake")
 
@@ -175,7 +176,11 @@ endif()
 # Install and output names
 # -----------------------------------------------------------------------------
 
-set(mi_install_dir "${CMAKE_INSTALL_PREFIX}/lib/mimalloc-${mi_version}")
+if (MI_INSTALL_TOPLEVEL MATCHES "ON")
+  set(mi_install_dir "${CMAKE_INSTALL_PREFIX}")
+else()
+  set(mi_install_dir "${CMAKE_INSTALL_PREFIX}/lib/mimalloc-${mi_version}")
+endif()
 if(MI_SECURE MATCHES "ON")
   set(mi_basename "mimalloc-secure")
 else()
@@ -227,7 +232,14 @@ if(MI_BUILD_SHARED)
       COMMENT "Copy mimalloc-redirect.dll to output directory")
   endif()
 
-  install(TARGETS mimalloc EXPORT mimalloc DESTINATION ${mi_install_dir} LIBRARY)
+  if (MI_INSTALL_TOPLEVEL MATCHES "ON")
+    install(TARGETS mimalloc EXPORT mimalloc LIBRARY
+        RUNTIME DESTINATION bin
+        LIBRARY DESTINATION lib
+        ARCHIVE DESTINATION lib)
+  else()
+    install(TARGETS mimalloc EXPORT mimalloc DESTINATION ${mi_install_dir} LIBRARY)
+  endif()
   install(EXPORT mimalloc DESTINATION ${mi_install_dir}/cmake)
 endif()
 
@@ -261,7 +273,7 @@ install(FILES include/mimalloc-new-delete.h DESTINATION ${mi_install_dir}/includ
 install(FILES cmake/mimalloc-config.cmake DESTINATION ${mi_install_dir}/cmake)
 install(FILES cmake/mimalloc-config-version.cmake DESTINATION ${mi_install_dir}/cmake)
 
-if(NOT WIN32 AND MI_BUILD_SHARED)
+if(NOT WIN32 AND MI_BUILD_SHARED AND NOT MI_INSTALL_TOPLEVEL)
   # install a symlink in the /usr/local/lib to the versioned library
   set(mi_symlink "${CMAKE_SHARED_MODULE_PREFIX}${mi_basename}${CMAKE_SHARED_LIBRARY_SUFFIX}")
   set(mi_soname "mimalloc-${mi_version}/${mi_symlink}.${mi_version}")