NetBSD/doc/TODO.clang

$NetBSD: TODO.clang,v 1.19 2016/02/27 21:42:14 joerg Exp $

Hacks for the clang integration
-------------------------------

"-no-integrated-as" is used in src/sys/arch/i386/stand to compensate
for the incomplete explicit positioning support in LLVM MC.

src/external/gpl3/gcc/usr.bin/backend forces tree.c to be compiled with -O0.
g++ otherwise crashes on trivial input.

src/external/mit/xorg/lib/pixman uses -fno-integrated-as on ARM for the
macro (ab)use.

src/tests/lib/libc/sync disables tests for atomics shorter than 32bit on
SPARC64 due to missing codegen support.

src/external/bsd/llvm/lib/libLLVMSupport and src/external/bsd/libc++/lib
explicitly require -Wa,-Av8plus at the moment, because atomic ops are
always lowered to CAS.
As workaround for limitations in Clang's atomic lowering on SPARC, require v8+ for those files that need C++11 atomics. 2016-02-28 00:42:14 +03:00			$NetBSD: TODO.clang,v 1.19 2016/02/27 21:42:14 joerg Exp $
Document poinst where the LLVM/clang integration is unclean 2011-05-30 20:25:31 +04:00
			`Hacks for the clang integration`
			`-------------------------------`

Fix typo. 2014-02-15 12:25:01 +04:00			`"-no-integrated-as" is used in src/sys/arch/i386/stand to compensate`
Update hacks. 2014-02-15 00:35:20 +04:00			`for the incomplete explicit positioning support in LLVM MC.`
On ARM, force compiling some files in libc++ and LLVM's support library with -march=armv6 to get native atomics as we currently lack the fallback symbols in libgcc and libc. 2014-01-16 01:14:54 +04:00
When building GCC with Clang, disable optimizations for tree.c until I can figure out what is responsible for the miscompilation. 2014-07-06 04:21:24 +04:00			`src/external/gpl3/gcc/usr.bin/backend forces tree.c to be compiled with -O0.`
Sync list of hacks with reality. 2015-01-29 23:45:41 +03:00			`g++ otherwise crashes on trivial input.`
Add pixman. 2014-08-10 23:12:08 +04:00
			`src/external/mit/xorg/lib/pixman uses -fno-integrated-as on ARM for the`
			`macro (ab)use.`
When building the atomic op test on SPARC64 with Clang, skip the sub-32bit tests for now. Clang currently doesn't synthesize a CAS replacement nor does it create a libcall. 2016-02-27 21:50:39 +03:00
			`src/tests/lib/libc/sync disables tests for atomics shorter than 32bit on`
			`SPARC64 due to missing codegen support.`
As workaround for limitations in Clang's atomic lowering on SPARC, require v8+ for those files that need C++11 atomics. 2016-02-28 00:42:14 +03:00
			`src/external/bsd/llvm/lib/libLLVMSupport and src/external/bsd/libc++/lib`
			`explicitly require -Wa,-Av8plus at the moment, because atomic ops are`
			`always lowered to CAS.`