On Mon Jan 31 11, Roman Divacky wrote:
> On Mon, Jan 31, 2011 at 04:27:55PM +0000, Alexander Best wrote:
> > On Sat Jan 1 11, Alexander Best wrote:
> > > On Sat Jan 1 11, Roman Divacky wrote:
> > > > > > clang -O2 -pipe -march=native -fpic -fvisibility=hidden
> > > > > > -DVISIBILITY_HIDDEN -g -std=gnu99 -fstack-protector
> > > > > > -Wsystem-headers -Wall -Wno-format-y2k -Wno-uninitialized
> > > > > > -Wno-pointer-sign -c
> > > > > > /usr/subversion-src/lib/libcompiler_rt/../../contrib/compiler-rt/lib/mulvti3.c
> > > > > > detected CPU = core2
> > > > > > Assertion failed: (getMinSignedBits() <= 64 && "Too many bits for
> > > > > > int64_t"), function getSExtValue, file
> > > > > > /usr/subversion-src/lib/clang/libclangcodegen/../../../contrib/llvm/include/llvm/ADT/APInt.h,
> > > > > > line 1149.
> > > > > > Stack dump:
> > > > > > 0. Program arguments:
> > > > > > /usr/obj/usr/subversion-src/tmp/usr/bin/clang -cc1 -triple
> > > > > > x86_64-undermydesk-freebsd9.0 -S -disable-free -main-file-name
> > > > > > mulvti3.c -pic-level 1 -mdisable-fp-elim -mconstructor-aliases
> > > > > > -munwind-tables -target-cpu core2 -g -resource-dir
> > > > > > /usr/obj/usr/subversion-src/tmp/usr/lib/clang/2.8 -D
> > > > > > VISIBILITY_HIDDEN -O2 -Wsystem-headers -Wall -Wno-format-y2k
> > > > > > -Wno-uninitialized -Wno-pointer-sign -std=gnu99 -ferror-limit 19
> > > > > > -fmessage-length 275 -fvisibility hidden -stack-protector 1
> > > > > > -fgnu-runtime -fdiagnostics-show-option -fcolor-diagnostics -o
> > > > > > /tmp/cc-G6mPQL.s -x c
> > > > > > /usr/subversion-src/lib/libcompiler_rt/../../contrib/compiler-rt/lib/mulvti3.c
> > > > > >
> > > > > > 1. <eof> parser at end of file
> > > > > > 2. Code generation
> > > > > > clang: error: clang frontend command failed due to signal 6 (use -v
> > > > > > to see invocation)
> > > > > > *** Error code 250
> > > >
> > > >
> > > > this is a genuine llvm bug it may have been (or may have been not)
> > > > fixed in recent llvm.
> > > >
> > > > if you feel like it - install llvm/clang from subversion and check if
> > > > it compiles this
> > > > ok. if it does not I think it's worth filing a bug in llvm bugzilla..
> >
> > i just wanted to report that the latest clang version doesn't trigger the
> > assert any longer:
> >
> > clang version 2.9 (trunk 124571)
> > Target: x86_64-unknown-freebsd9.0
> > Thread model: posix
> >
> > is there a way to have the local "-fformat-extensions" clang additions
> > pushed
> > upstream? maybe that mght be sufficient to compile the freebsd source with
> > clang 2.9+.
>
> no, it makes no sense to push the printf patches upstream. it's freebsd kernel
> only.
>
> for compiling freebsd kernel you are supposed to use /usr/bin/clang (or just
> ignore the warnings from upstream clang)
you should be able to reproduce the issue on arch=amd64 and the following in
/etc by doing 'make' in lib/libcompiler_rt:
otaku% cat /etc/make.conf /etc/src.conf
cat: /etc/make.conf: No such file or directory
# CLANG options
.if !defined(CC) || ${CC} == "cc"
CC=clang
.endif
.if !defined(CXX) || ${CXX} == "c++"
CXX=clang++
.endif
# Don't die on warnings
#NO_WERROR=
#WERROR=
# Enable debugging symbols for world
DEBUG_FLAGS = -g
... removing the "-g" switch from DEBUG_FLAGS solves the issue.
using the 2.9-development branch, lib/libcompiler_rt compiles fine even with
the -g switch.
cheers.
alex
>
>
> what are you trying to do anyway? :)
--
a13x
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