[Qemu-devel] [Bug 996303] [NEW] does not work with clang

[Qemu-devel] [Bug 996303] [NEW] does not work with clang

[Stevan Vucenovic]

Public bug reported:

Frozen on start.

CPU: dual-core 64-bit penryn
MacOS: 10.7.3-x86_64
Xcode: 4.3.2
CC: /usr/bin/clang
CXX: /usr/bin/clang++ => /usr/bin/clang
LD: /usr/bin/clang
CFLAGS: -Os -w -pipe -march=native -Qunused-arguments
CXXFLAGS: -Os -w -pipe -march=native -Qunused-arguments
MAKEFLAGS: -j2

** Affects: qemu
     Importance: Undecided
         Status: New

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Title:
  does not work with clang

Status in QEMU:
  New

Bug description:
  Frozen on start.

  CPU: dual-core 64-bit penryn
  MacOS: 10.7.3-x86_64
  Xcode: 4.3.2
  CC: /usr/bin/clang
  CXX: /usr/bin/clang++ => /usr/bin/clang
  LD: /usr/bin/clang
  CFLAGS: -Os -w -pipe -march=native -Qunused-arguments
  CXXFLAGS: -Os -w -pipe -march=native -Qunused-arguments
  MAKEFLAGS: -j2

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[Qemu-devel] [Bug 996303] Re: does not work with clang

[Wei-Ren Chen]

IIRC, clang doesn't support global register yet. Do you configure QEMU
to use TCI? What's the version of Clang and QEMU you're using?

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Title:
  does not work with clang

Status in QEMU:
  New

Bug description:
  Frozen on start.

  CPU: dual-core 64-bit penryn
  MacOS: 10.7.3-x86_64
  Xcode: 4.3.2
  CC: /usr/bin/clang
  CXX: /usr/bin/clang++ => /usr/bin/clang
  LD: /usr/bin/clang
  CFLAGS: -Os -w -pipe -march=native -Qunused-arguments
  CXXFLAGS: -Os -w -pipe -march=native -Qunused-arguments
  MAKEFLAGS: -j2

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[Qemu-devel] [Bug 996303] Re: does not work with clang

[Stevan Vucenovic]

This one does not compile:

./configure --prefix=/usr/local/Cellar/qemu/1.0.1 --cc=/usr/bin/clang
--host-cc=/usr/bin/clang --disable-darwin-user --enable-cocoa --disable-
bsd-user --disable-guest-agent

> In file included from /private/tmp/homebrew-qemu-1.0.1-CpcD/qemu-1.0.1/target-i386/op_helper.c:22:
/private/tmp/homebrew-qemu-1.0.1-CpcD/qemu-1.0.1/dyngen-exec.h:64:20: error: global register variables are not supported
register CPUState *env asm(AREG0);

This one compiles but freezes immediately:

./configure --prefix=/usr/local/Cellar/qemu/1.0.1 --cc=/usr/bin/llvm-gcc
--host-cc=/usr/bin/llvm-gcc --disable-darwin-user --enable-cocoa
--disable-bsd-user --disable-guest-agent

These two patches are applied:
https://trac.macports.org/export/92470/trunk/dports/emulators/qemu/files/patch-configure.diff
https://trac.macports.org/export/92470/trunk/dports/emulators/qemu/files/patch-cocoa-uint16-redefined.diff

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Title:
  does not work with clang

Status in QEMU:
  New

Bug description:
  Frozen on start.

  CPU: dual-core 64-bit penryn
  MacOS: 10.7.3-x86_64
  Xcode: 4.3.2
  CC: /usr/bin/clang
  CXX: /usr/bin/clang++ => /usr/bin/clang
  LD: /usr/bin/clang
  CFLAGS: -Os -w -pipe -march=native -Qunused-arguments
  CXXFLAGS: -Os -w -pipe -march=native -Qunused-arguments
  MAKEFLAGS: -j2

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[Qemu-devel] [Bug 996303] Re: does not work with clang

[Wei-Ren Chen]

O.K., the first thing you need to know is llvm-gcc uses GCC as it's
frontend to parse your source code, and uses LLVM as it's backend to
generate binary. In order to support global register correctly, not only
the frontend has to be able to recognize the global register syntax, but
also the LLVM backend is required to do the right thing. Since LLVM
doesn't support  global register, even llvm-gcc can  recognize the
global register syntax (uses GCC frontend), it cannot generate correct
binary. So this might be the problem you hit.

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Title:
  does not work with clang

Status in QEMU:
  New

Bug description:
  Frozen on start.

  CPU: dual-core 64-bit penryn
  MacOS: 10.7.3-x86_64
  Xcode: 4.3.2
  CC: /usr/bin/clang
  CXX: /usr/bin/clang++ => /usr/bin/clang
  LD: /usr/bin/clang
  CFLAGS: -Os -w -pipe -march=native -Qunused-arguments
  CXXFLAGS: -Os -w -pipe -march=native -Qunused-arguments
  MAKEFLAGS: -j2

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[Qemu-devel] [Bug 996303] Re: does not work with clang

[Stevan Vucenovic]

& there is no configure option to avoid using global registers ?

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Title:
  does not work with clang

Status in QEMU:
  New

Bug description:
  Frozen on start.

  CPU: dual-core 64-bit penryn
  MacOS: 10.7.3-x86_64
  Xcode: 4.3.2
  CC: /usr/bin/clang
  CXX: /usr/bin/clang++ => /usr/bin/clang
  LD: /usr/bin/clang
  CFLAGS: -Os -w -pipe -march=native -Qunused-arguments
  CXXFLAGS: -Os -w -pipe -march=native -Qunused-arguments
  MAKEFLAGS: -j2

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[Qemu-devel] [Bug 996303] Re: does not work with clang

[Wei-Ren Chen]

You can try to configure QEMU to use TCI (interpreter) rather then TCG
(jitter). IIRC, TCI doesn't use global register.

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Title:
  does not work with clang

Status in QEMU:
  New

Bug description:
  Frozen on start.

  CPU: dual-core 64-bit penryn
  MacOS: 10.7.3-x86_64
  Xcode: 4.3.2
  CC: /usr/bin/clang
  CXX: /usr/bin/clang++ => /usr/bin/clang
  LD: /usr/bin/clang
  CFLAGS: -Os -w -pipe -march=native -Qunused-arguments
  CXXFLAGS: -Os -w -pipe -march=native -Qunused-arguments
  MAKEFLAGS: -j2

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[Qemu-devel] [Bug 996303] Re: does not work with clang

[Stevan Vucenovic]

Can you please show me where to find configure options or specific
options to accomplish that ?

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Title:
  does not work with clang

Status in QEMU:
  New

Bug description:
  Frozen on start.

  CPU: dual-core 64-bit penryn
  MacOS: 10.7.3-x86_64
  Xcode: 4.3.2
  CC: /usr/bin/clang
  CXX: /usr/bin/clang++ => /usr/bin/clang
  LD: /usr/bin/clang
  CFLAGS: -Os -w -pipe -march=native -Qunused-arguments
  CXXFLAGS: -Os -w -pipe -march=native -Qunused-arguments
  MAKEFLAGS: -j2

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Re: [Qemu-devel] [Bug 996303] Re: does not work with clang

[陳韋任]

On Wed, May 09, 2012 at 08:05:25AM -0000, Stevan Vucenovic wrote:
> Can you please show me where to find configure options or specific
> options to accomplish that ?

  `../qemu/configure --enable-tcg-interpreter` will use TCI not TCG.
You can use `configure --help` to see what options it provides.

-- 
Wei-Ren Chen (陳韋任)
Computer Systems Lab, Institute of Information Science,
Academia Sinica, Taiwan (R.O.C.)
Tel:886-2-2788-3799 #1667
Homepage: http://people.cs.nctu.edu.tw/~chenwj

[Qemu-devel] [Bug 996303] Re: does not work with clang

[Wei-Ren Chen]

`../qemu/configure --enable-tcg-interpreter` will use TCI not TCG. You
can use `configure --help` to see what options it provides.

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Title:
  does not work with clang

Status in QEMU:
  New

Bug description:
  Frozen on start.

  CPU: dual-core 64-bit penryn
  MacOS: 10.7.3-x86_64
  Xcode: 4.3.2
  CC: /usr/bin/clang
  CXX: /usr/bin/clang++ => /usr/bin/clang
  LD: /usr/bin/clang
  CFLAGS: -Os -w -pipe -march=native -Qunused-arguments
  CXXFLAGS: -Os -w -pipe -march=native -Qunused-arguments
  MAKEFLAGS: -j2

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[Qemu-devel] [Bug 996303] Re: does not work with clang

[Stevan Vucenovic]

I was thinking there must be something like that ;-) thanks! btw why
this site is so nazi about deleting or editing comments ? :-] makes me
feel like I am in court in murder trial

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Title:
  does not work with clang

Status in QEMU:
  New

Bug description:
  Frozen on start.

  CPU: dual-core 64-bit penryn
  MacOS: 10.7.3-x86_64
  Xcode: 4.3.2
  CC: /usr/bin/clang
  CXX: /usr/bin/clang++ => /usr/bin/clang
  LD: /usr/bin/clang
  CFLAGS: -Os -w -pipe -march=native -Qunused-arguments
  CXXFLAGS: -Os -w -pipe -march=native -Qunused-arguments
  MAKEFLAGS: -j2

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[Qemu-devel] [Bug 996303] Re: does not work with clang

[Stevan Vucenovic]

It works! with --enable-tcg-interpreter!

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Title:
  does not work with clang

Status in QEMU:
  New

Bug description:
  Frozen on start.

  CPU: dual-core 64-bit penryn
  MacOS: 10.7.3-x86_64
  Xcode: 4.3.2
  CC: /usr/bin/clang
  CXX: /usr/bin/clang++ => /usr/bin/clang
  LD: /usr/bin/clang
  CFLAGS: -Os -w -pipe -march=native -Qunused-arguments
  CXXFLAGS: -Os -w -pipe -march=native -Qunused-arguments
  MAKEFLAGS: -j2

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[Qemu-devel] [Bug 996303] Re: does not work with clang

[Wei-Ren Chen]

You can send launchpad a bug report talking about this. ;-)

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Title:
  does not work with clang

Status in QEMU:
  New

Bug description:
  Frozen on start.

  CPU: dual-core 64-bit penryn
  MacOS: 10.7.3-x86_64
  Xcode: 4.3.2
  CC: /usr/bin/clang
  CXX: /usr/bin/clang++ => /usr/bin/clang
  LD: /usr/bin/clang
  CFLAGS: -Os -w -pipe -march=native -Qunused-arguments
  CXXFLAGS: -Os -w -pipe -march=native -Qunused-arguments
  MAKEFLAGS: -j2

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[Qemu-devel] [Bug 996303] Re: does not work with clang

[Wei-Ren Chen]

So O.K. to close? :-)

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Title:
  does not work with clang

Status in QEMU:
  New

Bug description:
  Frozen on start.

  CPU: dual-core 64-bit penryn
  MacOS: 10.7.3-x86_64
  Xcode: 4.3.2
  CC: /usr/bin/clang
  CXX: /usr/bin/clang++ => /usr/bin/clang
  LD: /usr/bin/clang
  CFLAGS: -Os -w -pipe -march=native -Qunused-arguments
  CXXFLAGS: -Os -w -pipe -march=native -Qunused-arguments
  MAKEFLAGS: -j2

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[Qemu-devel] [Bug 996303] Re: does not work with clang

[Stevan Vucenovic]

Sure! thanks again!

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Title:
  does not work with clang

Status in QEMU:
  New

Bug description:
  Frozen on start.

  CPU: dual-core 64-bit penryn
  MacOS: 10.7.3-x86_64
  Xcode: 4.3.2
  CC: /usr/bin/clang
  CXX: /usr/bin/clang++ => /usr/bin/clang
  LD: /usr/bin/clang
  CFLAGS: -Os -w -pipe -march=native -Qunused-arguments
  CXXFLAGS: -Os -w -pipe -march=native -Qunused-arguments
  MAKEFLAGS: -j2

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[Qemu-devel] [Bug 996303] Re: does not work with clang

[Stevan Vucenovic]

** Visibility changed to: Public

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Title:
  does not work with clang

Status in QEMU:
  New

Bug description:
  Frozen on start.

  CPU: dual-core 64-bit penryn
  MacOS: 10.7.3-x86_64
  Xcode: 4.3.2
  CC: /usr/bin/clang
  CXX: /usr/bin/clang++ => /usr/bin/clang
  LD: /usr/bin/clang
  CFLAGS: -Os -w -pipe -march=native -Qunused-arguments
  CXXFLAGS: -Os -w -pipe -march=native -Qunused-arguments
  MAKEFLAGS: -j2

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[Qemu-devel] [Bug 996303] Re: does not work with clang

[Paolo Bonzini]

** Changed in: qemu
       Status: New => Fix Committed

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Title:
  does not work with clang

Status in QEMU:
  Fix Committed

Bug description:
  Frozen on start.

  CPU: dual-core 64-bit penryn
  MacOS: 10.7.3-x86_64
  Xcode: 4.3.2
  CC: /usr/bin/clang
  CXX: /usr/bin/clang++ => /usr/bin/clang
  LD: /usr/bin/clang
  CFLAGS: -Os -w -pipe -march=native -Qunused-arguments
  CXXFLAGS: -Os -w -pipe -march=native -Qunused-arguments
  MAKEFLAGS: -j2

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[Qemu-devel] [Bug 996303] Re: does not work with clang

[Karl-Michael Schindler]

I tried another approach in my patch for the package in fink on Mac OS
X. Since dyngen-exec.h seems to be the only place with a GLOBAL register
variable, I removed register from the variable declaration. So far, it
seems to work. Regarding an impact on performance, I have no
information. Has anyone an idea about it?

Regarding testing the patch from above with --enable-tcg-interpreter,
the problem is that I do not have 10.7 or 10.8 and therefore have to ask
others.

Regards

Michael Schindler, maintainer of the fink package of qemu.

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Title:
  does not work with clang

Status in QEMU:
  Fix Committed

Bug description:
  Frozen on start.

  CPU: dual-core 64-bit penryn
  MacOS: 10.7.3-x86_64
  Xcode: 4.3.2
  CC: /usr/bin/clang
  CXX: /usr/bin/clang++ => /usr/bin/clang
  LD: /usr/bin/clang
  CFLAGS: -Os -w -pipe -march=native -Qunused-arguments
  CXXFLAGS: -Os -w -pipe -march=native -Qunused-arguments
  MAKEFLAGS: -j2

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[Qemu-devel] [Bug 996303] Re: does not work with clang

[Peter Maydell]

>  I removed register from the variable declaration

That is going to be badly broken somewhere along the line for at least
some CPU targets: don't try to ship that!

This is all fixed properly in git master (because Blue Swirl committed a lot of patches that let us finally drop the need for that global register variable), so either:
 (1) compile with a real gcc (not llvm-gcc or clang)
 (2) use git master
 (3) wait for 1.3.

For fink it should be entirely possible to use option (1) I would have
thought.

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Title:
  does not work with clang

Status in QEMU:
  Fix Committed

Bug description:
  Frozen on start.

  CPU: dual-core 64-bit penryn
  MacOS: 10.7.3-x86_64
  Xcode: 4.3.2
  CC: /usr/bin/clang
  CXX: /usr/bin/clang++ => /usr/bin/clang
  LD: /usr/bin/clang
  CFLAGS: -Os -w -pipe -march=native -Qunused-arguments
  CXXFLAGS: -Os -w -pipe -march=native -Qunused-arguments
  MAKEFLAGS: -j2

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[Qemu-devel] [Bug 996303] Re: does not work with clang

[Karl-Michael Schindler]

> That is going to be badly broken somewhere along the line for at least some
> CPU targets: don't try to ship that!

oops. already done. oh well.

>This is all fixed properly in git master (because Blue Swirl committed a lot
> of patches that let us finally drop the need for that global register
> variable), so either:
> (1) compile with a real gcc (not llvm-gcc or clang)
> (2) use git master
> (3) wait for 1.3.

Thanks for the explanation.

option (1) is a pain for 10.7/8 because it means dependence on fink's gcc. 
option (2) is not straight forward, because a fink package needs a fixed base of source code. Although it means some extra works, this seems the way to go, though. A brief check of the git commits revealed that the number of commits is rather large and it is probably best to base the fink package on a distinct commit. I will try that in the next days.

Michael

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Title:
  does not work with clang

Status in QEMU:
  Fix Committed

Bug description:
  Frozen on start.

  CPU: dual-core 64-bit penryn
  MacOS: 10.7.3-x86_64
  Xcode: 4.3.2
  CC: /usr/bin/clang
  CXX: /usr/bin/clang++ => /usr/bin/clang
  LD: /usr/bin/clang
  CFLAGS: -Os -w -pipe -march=native -Qunused-arguments
  CXXFLAGS: -Os -w -pipe -march=native -Qunused-arguments
  MAKEFLAGS: -j2

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[Qemu-devel] [Bug 996303] Re: does not work with clang

[Karl-Michael Schindler]

Hi

Faster than promised: Fink package qemu for 10.7/8 is now based on the
git commit ac05f3492421caeb05809ffa02c6198ede179e43.

Michael.

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Title:
  does not work with clang

Status in QEMU:
  Fix Committed

Bug description:
  Frozen on start.

  CPU: dual-core 64-bit penryn
  MacOS: 10.7.3-x86_64
  Xcode: 4.3.2
  CC: /usr/bin/clang
  CXX: /usr/bin/clang++ => /usr/bin/clang
  LD: /usr/bin/clang
  CFLAGS: -Os -w -pipe -march=native -Qunused-arguments
  CXXFLAGS: -Os -w -pipe -march=native -Qunused-arguments
  MAKEFLAGS: -j2

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[Qemu-devel] [Bug 996303] Re: does not work with clang

[Peter Maydell]

This was released in QEMU 1.3.


** Changed in: qemu
       Status: Fix Committed => Fix Released

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Title:
  does not work with clang

Status in QEMU:
  Fix Released

Bug description:
  Frozen on start.

  CPU: dual-core 64-bit penryn
  MacOS: 10.7.3-x86_64
  Xcode: 4.3.2
  CC: /usr/bin/clang
  CXX: /usr/bin/clang++ => /usr/bin/clang
  LD: /usr/bin/clang
  CFLAGS: -Os -w -pipe -march=native -Qunused-arguments
  CXXFLAGS: -Os -w -pipe -march=native -Qunused-arguments
  MAKEFLAGS: -j2

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