diff --git a/CMakeLists.txt b/CMakeLists.txt
index 05df33e6..580e38cb 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -25,6 +25,7 @@ option(MI_CHECK_FULL        "Use full internal invariant checking in DEBUG mode
 option(MI_INSTALL_TOPLEVEL  "Install directly into $CMAKE_INSTALL_PREFIX instead of PREFIX/lib/mimalloc-version" OFF)
 option(MI_USE_LIBATOMIC     "Explicitly link with -latomic (on older systems)" OFF)
 
+include(GNUInstallDirs)
 include("cmake/mimalloc-config-version.cmake")
 
 set(mi_sources
@@ -230,9 +231,9 @@ endif()
 # -----------------------------------------------------------------------------
 
 if (MI_INSTALL_TOPLEVEL)
-  set(mi_install_libdir   "lib")
-  set(mi_install_incdir   "include")
-  set(mi_install_cmakedir "cmake")
+  set(mi_install_libdir   "${CMAKE_INSTALL_LIBDIR}")
+  set(mi_install_incdir   "${CMAKE_INSTALL_INCLUDEDIR}")
+  set(mi_install_cmakedir "${CMAKE_INSTALL_LIBDIR}/cmake/mimalloc")
 else()
   set(mi_install_libdir   "lib/mimalloc-${mi_version}")
   set(mi_install_incdir   "include/mimalloc-${mi_version}")
diff --git a/cmake/mimalloc-config.cmake b/cmake/mimalloc-config.cmake
index 024c97d9..9b0a56d7 100644
--- a/cmake/mimalloc-config.cmake
+++ b/cmake/mimalloc-config.cmake
@@ -4,8 +4,8 @@ if (MIMALLOC_SHARE_DIR MATCHES "/share/")
   string(REPLACE "/share/" "/lib/"     MIMALLOC_LIBRARY_DIR ${MIMALLOC_SHARE_DIR})
   string(REPLACE "/share/" "/include/" MIMALLOC_INCLUDE_DIR ${MIMALLOC_SHARE_DIR})
 else()
-  # if MI_INSTALL_TOPLEVEL==ON
-  set(MIMALLOC_LIBRARY_DIR "${MIMALLOC_SHARE_DIR}/lib")      
-  set(MIMALLOC_INCLUDE_DIR "${MIMALLOC_SHARE_DIR}/include")  
+  # installed with -DMI_INSTALL_TOPLEVEL=ON
+  string(REPLACE "/lib/cmake" "/lib"     MIMALLOC_LIBRARY_DIR "${MIMALLOC_SHARE_DIR}")  
+  string(REPLACE "/lib/cmake" "/include" MIMALLOC_INCLUDE_DIR "${MIMALLOC_SHARE_DIR}")  
 endif()  
 set(MIMALLOC_TARGET_DIR "${MIMALLOC_LIBRARY_DIR}") # legacy
diff --git a/include/mimalloc-internal.h b/include/mimalloc-internal.h
index cfe5847b..f0692307 100644
--- a/include/mimalloc-internal.h
+++ b/include/mimalloc-internal.h
@@ -276,11 +276,11 @@ static inline bool mi_malloc_satisfies_alignment(size_t alignment, size_t size)
 #endif
 static inline bool mi_mul_overflow(size_t count, size_t size, size_t* total) {
   #if (SIZE_MAX == ULONG_MAX)
-    return __builtin_umull_overflow(count, size, total);
+    return __builtin_umull_overflow(count, size, (unsigned long *)total);
   #elif (SIZE_MAX == UINT_MAX)
-    return __builtin_umul_overflow(count, size, total);
+    return __builtin_umul_overflow(count, size, (unsigned int *)total);
   #else
-    return __builtin_umulll_overflow(count, size, total);
+    return __builtin_umulll_overflow(count, size, (unsigned long long *)total);
   #endif
 }
 #else /* __builtin_umul_overflow is unavailable */
diff --git a/include/mimalloc.h b/include/mimalloc.h
index 58c91108..71cdaa8d 100644
--- a/include/mimalloc.h
+++ b/include/mimalloc.h
@@ -8,7 +8,7 @@ terms of the MIT license. A copy of the license can be found in the file
 #ifndef MIMALLOC_H
 #define MIMALLOC_H
 
-#define MI_MALLOC_VERSION 201   // major + 2 digits minor
+#define MI_MALLOC_VERSION 203   // major + 2 digits minor
 
 // ------------------------------------------------------
 // Compiler specific attributes
@@ -391,6 +391,7 @@ mi_decl_nodiscard mi_decl_export void* mi_new_reallocn(void* p, size_t newcount,
 // ---------------------------------------------------------------------------------------------
 #ifdef __cplusplus
 
+#include <cstddef>     // std::size_t
 #include <cstdint>     // PTRDIFF_MAX
 #if (__cplusplus >= 201103L) || (_MSC_VER > 1900)  // C++11
 #include <type_traits> // std::true_type
diff --git a/src/alloc.c b/src/alloc.c
index 59b226c1..df3036f4 100644
--- a/src/alloc.c
+++ b/src/alloc.c
@@ -802,7 +802,10 @@ static bool mi_try_new_handler(bool nothrow) {
     std::set_new_handler(h);
   #endif  
   if (h==NULL) {
-    if (!nothrow) throw std::bad_alloc();
+    _mi_error_message(ENOMEM, "out of memory in 'new'");      
+    if (!nothrow) {
+      throw std::bad_alloc();
+    }
     return false;
   }
   else {
@@ -830,9 +833,9 @@ static std_new_handler_t mi_get_new_handler() {
 static bool mi_try_new_handler(bool nothrow) {
   std_new_handler_t h = mi_get_new_handler();
   if (h==NULL) {
+    _mi_error_message(ENOMEM, "out of memory in 'new'");       
     if (!nothrow) {
-      _mi_error_message(EFAULT, "out of memory in 'new' call"); // cannot throw in plain C, use EFAULT to abort
-      abort();
+      abort();  // cannot throw in plain C, use abort
     }
     return false;
   }
diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index 7d28f2bd..a454669e 100644
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -1,6 +1,9 @@
 cmake_minimum_required(VERSION 3.0)
 project(mimalloc-test C CXX)
 
+set(CMAKE_C_STANDARD 11)
+set(CMAKE_CXX_STANDARD 17)
+
 # Set default build type
 if (NOT CMAKE_BUILD_TYPE)
   if ("${CMAKE_BINARY_DIR}" MATCHES ".*(D|d)ebug$")