[reactos] 15/19: [NTOSKRNL] DO not disable optimisations when compiling with CLang

[Jérôme Gardou]

https://git.reactos.org/?p=reactos.git;a=commitdiff;h=9e7071e8fbb3e321579d1…

commit 9e7071e8fbb3e321579d12d4390f41ad110e8427
Author:     Jérôme Gardou <jerome.gardou(a)reactos.org>
AuthorDate: Mon Nov 9 17:01:07 2020 +0100
Commit:     Jérôme Gardou <zefklop(a)users.noreply.github.com>
CommitDate: Mon Nov 16 16:58:10 2020 +0100

    [NTOSKRNL] DO not disable optimisations when compiling with CLang
---
 ntoskrnl/CMakeLists.txt | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/ntoskrnl/CMakeLists.txt b/ntoskrnl/CMakeLists.txt
index 84125c75c9b..fd093c6ca06 100644
--- a/ntoskrnl/CMakeLists.txt
+++ b/ntoskrnl/CMakeLists.txt
@@ -43,8 +43,10 @@ if(MSVC)
     add_target_link_flags(ntoskrnl "/SECTION:.rsrc,!DP") #Accessed from
bugcheck code
     add_target_link_flags(ntoskrnl "/SECTION:INIT,ERWD")
 else()
-    if(GDB)
+    if(GDB AND NOT CLANG)
         # Completely disable optimizations when debugging the kernel
+        # Not for CLang, which fails as following in _SEH2_EXCEPT macro:
+        # error: inline assembly requires more registers than available
         target_compile_options(ntoskrnl PRIVATE -O0)
         set_image_base(ntoskrnl 0x00800000)
     else()