From e00922a0fe09687bbd7518aa95a9142e457d82d3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?J=C3=A9r=C3=B4me=20Gardou?= <jerome.gardou@reactos.org>
Date: Mon, 9 Nov 2020 09:41:48 +0100
Subject: [PATCH] [NTOSKRNL] Link memcmp to the import lib when using CLang

CLang performs some optimisations on e.g. strcmp, but memcmp is not exported by ntoskrnl
---
 ntoskrnl/CMakeLists.txt | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/ntoskrnl/CMakeLists.txt b/ntoskrnl/CMakeLists.txt
index 13ca75e351a..84125c75c9b 100644
--- a/ntoskrnl/CMakeLists.txt
+++ b/ntoskrnl/CMakeLists.txt
@@ -12,6 +12,11 @@ set(NTKRNLMP_ASM_SOURCE ${ASM_SOURCE})
 spec2def(ntoskrnl.exe ntoskrnl.spec ADD_IMPORTLIB)
 add_asm_files(ntoskrnl_asm ${NTOSKRNL_ASM_SOURCE})
 
+if (GCC AND CLANG)
+    # Clang optimises strcmp calls to memcmp.
+    target_link_libraries(libntoskrnl INTERFACE memcmp)
+endif()
+
 list(APPEND PCH_SKIP_SOURCE
     guid.c)