On 2012-01-01 16:56, Nathan Whitehorn wrote:
Author: nwhitehorn Date: Sun Jan 1 15:56:15 2012 New Revision: 229169 URL: http://svn.freebsd.org/changeset/base/229169Log: Instead of forcing -O1 on PowerPC for LLVM and clang, fix the actual problem by adding -fno-strict-aliasing to CFLAGS. Since this is a global issue that just happened to manifest on PowerPC, add this to CFLAGS unconditionally. MFC after: 1 week Modified: head/lib/clang/clang.build.mk Modified: head/lib/clang/clang.build.mk ============================================================================== --- head/lib/clang/clang.build.mk Sun Jan 1 09:12:21 2012 (r229168) +++ head/lib/clang/clang.build.mk Sun Jan 1 15:56:15 2012 (r229169) @@ -8,10 +8,8 @@ CFLAGS+=-I${LLVM_SRCS}/include -I${CLANG -DLLVM_ON_UNIX -DLLVM_ON_FREEBSD \ -D__STDC_LIMIT_MACROS -D__STDC_CONSTANT_MACROS #-DNDEBUG -# Correct for gcc miscompilation when compiling on PPC with -O2 -.if ${MACHINE_CPUARCH} == "powerpc" -CFLAGS+= -O1 -.endif +# LLVM is not strict aliasing safe as of 12/31/2011 +CFLAGS+= -fno-strict-aliasing
Actually, LLVM is strict-aliasing safe, but not for gcc 4.2.1. :) There is some sort of problem with gcc's optimizer that made a few LLVM tests fails mysteriously in the past. At a certain point, these problems went away for x86, but apparently not for non-x86... In any case, this option should only have to be added when the compiler is base gcc. _______________________________________________ svn-src-head@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
