[reactos] 04/06: [CMAKE] Use -fcommon when using CLang

[Jérôme Gardou]

https://git.reactos.org/?p=reactos.git;a=commitdiff;h=56e56f8eccc4e6d4678ab…

commit 56e56f8eccc4e6d4678ab2723ece2981001715ca
Author:     Jérôme Gardou <jerome.gardou(a)reactos.org>
AuthorDate: Tue Dec 22 12:32:45 2020 +0100
Commit:     Jérôme Gardou <zefklop(a)users.noreply.github.com>
CommitDate: Mon Dec 28 12:13:30 2020 +0100

    [CMAKE] Use -fcommon when using CLang
---
 sdk/cmake/msvc.cmake | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/sdk/cmake/msvc.cmake b/sdk/cmake/msvc.cmake
index a3048c34e1d..10beb82f704 100644
--- a/sdk/cmake/msvc.cmake
+++ b/sdk/cmake/msvc.cmake
@@ -55,6 +55,11 @@ if(ARCH STREQUAL "i386")
     endif()
 endif()
 
+# CLang default to -fno-common from version 11 onward. We are not rady for this now
+if (USE_CLANG_CL)
+    add_compile_options(-fcommon)
+endif()
+
 # VS 12+ requires /FS when used in parallel compilations
 if(NOT MSVC_IDE)
     add_compile_options(/FS)