K 10
svn:author
V 3
dim
K 8
svn:date
V 27
2021-12-25T12:03:04.215103Z
K 7
svn:log
V 834
clang: Build with -fno-strict-aliasing when using GCC

Somewhat ironically, there are strict aliasing violations in Clang,
which can result in the following assertion failure:

  Assertion `*(NamedDecl **)&Data == ND && "PointerUnion mangles the NamedDecl pointer!"' failed.

Upstream's clang/CMakeLists.txt specifically (not LLVM as a whole)
passes -fno-strict-aliasing if the compiler is not Clang, and this fixes
the above issue.

This was seen when cross-building from Linux using a bootstrap
compiler, but likely also affects worlds built with a new enough
external GCC toolchain.

MFC after:	1 week
Reviewed by:	dim
Differential Revision:	https://reviews.freebsd.org/D31533

(cherry picked from commit c1f7d8dd23db693106fcd66e0b1766a3f3194670)

Git Hash:   c8105d1652b2def0ec05f96d39c5e3a4a6c56992
Git Author: jrtc27@FreeBSD.org
END