From: Mika Lindqvist <postmaster@raasu.org>
Date: Tue, 15 Mar 2022 15:19:58 +0000 (+0200)
Subject: Don't use -mtune with ClangCl.
X-Git-Tag: 2.1.0-beta1~333
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5db8d3cf13c9294a41cb68b0a6becb899f54e562;p=thirdparty%2Fzlib-ng.git

Don't use -mtune with ClangCl.
---

diff --git a/cmake/detect-intrinsics.cmake b/cmake/detect-intrinsics.cmake
index c4231c26..9a4e54c3 100644
--- a/cmake/detect-intrinsics.cmake
+++ b/cmake/detect-intrinsics.cmake
@@ -34,7 +34,10 @@ macro(check_avx512_intrinsics)
         if(NOT NATIVEFLAG)
             # For CPUs that can benefit from AVX512, it seems GCC generates suboptimal
             # instruction scheduling unless you specify a reasonable -mtune= target
-            set(AVX512FLAG "-mavx512f -mavx512dq -mavx512bw -mavx512vl -mtune=cascadelake")
+            set(AVX512FLAG "-mavx512f -mavx512dq -mavx512bw -mavx512vl")
+            if(NOT CMAKE_GENERATOR_TOOLSET MATCHES "ClangCl")
+                set(AVX512FLAG "${AVX512FLAG} -mtune=cascadelake")
+            endif()
         endif()
     elseif(MSVC)
         set(AVX512FLAG "/ARCH:AVX512")
@@ -79,7 +82,10 @@ macro(check_avx512vnni_intrinsics)
         endif()
     elseif(CMAKE_C_COMPILER_ID MATCHES "GNU" OR CMAKE_C_COMPILER_ID MATCHES "Clang")
         if(NOT NATIVEFLAG)
-            set(AVX512VNNIFLAG "-mavx512f -mavx512dq -mavx512bw -mavx512vl -mavx512vnni -mtune=cascadelake")
+            set(AVX512VNNIFLAG "-mavx512f -mavx512dq -mavx512bw -mavx512vl -mavx512vnni")
+            if(NOT CMAKE_GENERATOR_TOOLSET MATCHES "ClangCl")
+                set(AVX512VNNIFLAG "${AVX512VNNIFLAG} -mtune=cascadelake")
+            endif()
         endif()
     elseif(MSVC)
         set(AVX512VNNIFLAG "/ARCH:AVX512")