[Bug bootstrap/37308] New: bootstrap hug on libstdc++.a

[Bug bootstrap/37308] New: bootstrap hug on libstdc++.a

[cnstar9988 at gmail dot com]

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gcc 4.2.4 works well, and not support "__thead".

gcc 4.3.2 bootstrap hug on libstdc++.a.
but when I use --disable-tls, hug the same......

===============================================================
AIX 5.1 doesn't supprt TLS.
Only supported on AIX® for POWER™ version 5.3 with the 5300-05 Technology Level
and higher.
http://publib.boulder.ibm.com/infocenter/comphelp/v9v111/topic/com.ibm.xlcpp9.aix.doc/compiler_ref/opt_tls.htm#opt_tls

-----------------------------------
__thread int a,b;
int main()
{
  return a==b;
}


-- 
           Summary: bootstrap hug on libstdc++.a
           Product: gcc
           Version: 4.3.3
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: bootstrap
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: cnstar9988 at gmail dot com
 GCC build triplet: powerpc-ibm-aix5.1.0.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37308

[Bug bootstrap/37308] bootstrap hug on libstdc++.a

[paolo dot carlini at oracle dot com]

------- Comment #1 from paolo dot carlini at oracle dot com  2008-09-01 09:53 -------
Do you mean *hangs* during bootstrap?? Sorry, but it's not at all clear what is
happening exactly on your side.

David, can you follow a bit this... ?


-- 

paolo dot carlini at oracle dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |dje at watson dot ibm dot
                   |                            |com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37308

[Bug bootstrap/37308] bootstrap hug on libstdc++.a

[cnstar9988 at gmail dot com]

------- Comment #2 from cnstar9988 at gmail dot com  2008-09-01 10:15 -------
(In reply to comment #1)
> Do you mean *hangs* during bootstrap?? Sorry, but it's not at all clear what is
> happening exactly on your side.
> David, can you follow a bit this... ?
the bootrap stop at ./conftest for a long time.

I will "remove" TLS check code in libstdc++-v3/configure and test again.
==================================================================
  # For TLS support.  

enable_tls=no
gcc_cv_have_tls=no

  # For _Unwind_GetIPInfo.


======================================================
conftest.c
===============
__thread int a,b;
int main()
{
  return a==b;
}


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37308

[Bug bootstrap/37308] bootstrap hug on libstdc++.a

[cnstar9988 at gmail dot com]

------- Comment #3 from cnstar9988 at gmail dot com  2008-09-01 10:23 -------
$ oslevel -r
5100-09
with all latest AIX 5.1 patch.

=================================
I can compile gcc 4.2.4, works ok, and used for bootstrap gcc.
gcc 4.2.4 can't support TLS "__thread", "test.c:1: error: thread-local storage
not supported for this target"

=================================
when build gcc 4.3.2, both --disable-tls or not failed, *hangs* at same code.
stop at ./conftest for a long time.

Target: powerpc-ibm-aix5.1.0.0
Configured with: ../src/configure --prefix=/opt/gcc-4.3.2
--with-gmp=/opt/gcc-4.3.2 --with-mpfr=/opt/gcc-4.3.2 --with-as=/usr/bin/as
--with-ld=/usr/bin/ld --disable-nls --disable-tls --disable-shared
--disable-libgomp --enable-languages=c,c++ --enable-threads
--enable-version-specific-runtime-libs --build=powerpc-ibm-aix5.1.0.0


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37308

[Bug bootstrap/37308] bootstrap hangs in libstdc++

[paolo dot carlini at oracle dot com]

------- Comment #4 from paolo dot carlini at oracle dot com  2008-09-01 10:25 -------
Note that the TLS check code is used in libstdc++-v3, but it's actually part of
the general GCC config infrastructure: tls.m4. It's also used in libjava, for
example.


-- 

paolo dot carlini at oracle dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|bootstrap hug on libstdc++.a|bootstrap hangs in libstdc++


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37308

Re: [Bug bootstrap/37308] bootstrap hangs in libstdc++

[Andrew Thomas Pinski]

Sent from my iPhone

On Sep 1, 2008, at 3:25, "paolo dot carlini at oracle dot com" <gcc-bugzilla@gcc.gnu.org 
 > wrote:

>
>
> ------- Comment #4 from paolo dot carlini at oracle dot com   
> 2008-09-01 10:25 -------
> Note that the TLS check code is used in libstdc++-v3, but it's  
> actually part of
> the general GCC config infrastructure: tls.m4. It's also used in  
> libjava, for
> example.

The other thing is that _thread is emulated on targets that don't  
support it.

>
>
>
> -- 
>
> paolo dot carlini at oracle dot com changed:
>
>           What    |Removed                     |Added
> --- 
> --- 
> ----------------------------------------------------------------------
>            Summary|bootstrap hug on libstdc++.a|bootstrap hangs in  
> libstdc++
>
>
> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37308
>

[Bug bootstrap/37308] bootstrap hangs in libstdc++

[cnstar9988 at gmail dot com]

------- Comment #5 from cnstar9988 at gmail dot com  2008-09-01 10:34 -------
gcc 4.2.4 doesn't support tls on AIX 5.1.
Does gcc 4.3.2 support tls on AIX 5.1? Maybe stage3 gcc can compile "__thread",
but can't run well?
why I configure with --disable-tls, gcc 4.3.2 always use and check tls?

IBM XLC 9.0 says "Only supported on AIX for POWER version 5.3 with the 5300-05
Technology Level and higher."

Thanks.

I will "remove" TLS check code in libstdc++-v3/configure and test again.
======================================================================
  # For TLS support.  

enable_tls=no
gcc_cv_have_tls=no

  # For _Unwind_GetIPInfo.


-- 

cnstar9988 at gmail dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
 GCC target triplet|powerpc-ibm-aix5.1.0.0      |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37308

[Bug bootstrap/37308] bootstrap hangs in libstdc++

[pinskia at gmail dot com]

------- Comment #6 from pinskia at gmail dot com  2008-09-01 10:43 -------
Subject: Re:  bootstrap hangs in libstdc++



Sent from my iPhone

On Sep 1, 2008, at 3:25, "paolo dot carlini at oracle dot com"
<gcc-bugzilla@gcc.gnu.org 
 > wrote:

>
>
> ------- Comment #4 from paolo dot carlini at oracle dot com   
> 2008-09-01 10:25 -------
> Note that the TLS check code is used in libstdc++-v3, but it's  
> actually part of
> the general GCC config infrastructure: tls.m4. It's also used in  
> libjava, for
> example.

The other thing is that _thread is emulated on targets that don't  
support it.

>
>
>
> -- 
>
> paolo dot carlini at oracle dot com changed:
>
>           What    |Removed                     |Added
> --- 
> --- 
> ----------------------------------------------------------------------
>            Summary|bootstrap hug on libstdc++.a|bootstrap hangs in  
> libstdc++
>
>
> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37308
>


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37308

[Bug bootstrap/37308] bootstrap hangs in libstdc++

[paolo dot carlini at oracle dot com]

------- Comment #7 from paolo dot carlini at oracle dot com  2008-09-01 11:09 -------
(In reply to comment #6)
> The other thing is that __thread is emulated on targets that don't  
> support it.

That's interesting, I didn't notice we are actually doing that, right now (I
remember some discussions...). Then, however, I'm missing more... Why we are
running the check in libstdc++-v3 and libjava two times instead of just running
it once and, if necessary, instantiating the emulation and, in case, passing
down the info to the libraries?!?


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37308

[Bug bootstrap/37308] bootstrap hangs in libstdc++

[cnstar9988 at gmail dot com]

------- Comment #8 from cnstar9988 at gmail dot com  2008-09-01 11:24 -------
When I remove TLS check code in libstdc++-v3/configure, bootstrap OK!!!

Does there have anything harm when remove the TLS check code? affect only C++?
Thanks!
==================================================================
  # For TLS support.  

enable_tls=no
gcc_cv_have_tls=no

  # For _Unwind_GetIPInfo.


======================================================
conftest.c
===============
__thread int a,b;
int main()
{
  return a==b;
}


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37308

[Bug bootstrap/37308] bootstrap hangs in libstdc++

[dje at gcc dot gnu dot org]

------- Comment #9 from dje at gcc dot gnu dot org  2008-09-02 20:16 -------
GNU Java does not work on AIX, so TLS is irrelevant there.

AIX 5.1 no longer is supported in general.  I no longer have access to AIX 5.1
systems.  GCC currently does not explicitly support AIX TLS -- __thread calls
are not converted to AIX TLS.

If libstdc++ can accomodate AIX 5.1, that is great.  I am not sure what else to
pursue.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37308

[Bug bootstrap/37308] bootstrap hangs in libstdc++

[pinskia at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37308

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |WAITING
   Last reconfirmed|                            |2012-01-28
      Known to work|                            |
     Ever Confirmed|0                           |1

--- Comment #10 from Andrew Pinski <pinskia at gcc dot gnu.org> 2012-01-28 04:41:32 UTC ---
Does happen with a newer version of the compiler like say 4.6.3?

[Bug bootstrap/37308] bootstrap hangs in libstdc++

[pinskia at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37308

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|WAITING                     |RESOLVED
         Resolution|                            |INVALID

--- Comment #11 from Andrew Pinski <pinskia at gcc dot gnu.org> 2012-05-22 06:11:58 UTC ---
No feedback in over 4 months so closing.