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Aaron Gray

2009-Feb-25 23:51 UTC

[LLVMdev] -fPIC warning on every compile on Cygwin

On Sat, Feb 21, 2009 at 7:14 PM, Nick Lewycky <nicholas at mxc.ca> wrote:
> Aaron Gray wrote:
> > On Thu, Feb 19, 2009 at 6:55 PM, Nick Lewycky <nicholas at mxc.ca
> > <mailto:nicholas at mxc.ca>> wrote:
> >
> >     Aaron Gray wrote:
> >      > On Thu, Feb 19, 2009 at 5:52 PM, Nick Lewycky <nicholas
at mxc.ca
> >     <mailto:nicholas at mxc.ca>
> >      > <mailto:nicholas at mxc.ca <mailto:nicholas at
mxc.ca>>> wrote:
> >      >
> >      >     Aaron Gray wrote:
> >      >      > Hi,
> >      >      >
> >      >      > I partly built LLVM on Cygwin yesterday and it was
fine as
> >     far as it
> >      >      > went. But after doing a svn update today I am
getting the
> >     following
> >      >      > warning on every compile :-
> >      >      >
> >      >      >
> >      >      >     llvm[3]: Compiling LowerAllocations.cpp for
Debug build
> >      >      >
> /usr/src/llvm/lib/Transforms/Utils/LowerAllocations.cpp:1:
> >      >     warning:
> >      >      >     -fPIC ignored for target (all code is position
> >     independent)
> >      >      >
> >      >      >
> >      >      > This maybe happening on other targets too.
> >      >
> >      >     Thanks for the report. This is certainly due to my
change
> >     last night to
> >      >     make LLVM build as PIC by default.
> >      >
> >      > I was a little perplex at the warning as I could not
ascertain
> where
> >      > thery were coming from and could see no obvious commit  !:)
> >      >
> >      > Out of interest, could you point me to the patch or commit,
> please.
> >
> >     r65019 / r65020:
> >
>
http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20090216/073983.html
> >
>
http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20090216/073984.html
> >
> > Can you please email me if and when it is fixed :)
>
> Should be fixed in r65229:
> http://llvm.org/viewvc/llvm-project?view=rev&revision=65229
>Cygwin is still giving "-fPIC ignored for target (all code is position
independent)" warnings :(

I have tried from LLVM svn mainline.

Sorry that I did not get round to trying it earlier.

Aaron
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Nick Lewycky

2009-Feb-27 07:14 UTC

head link

[LLVMdev] -fPIC warning on every compile on Cygwin

Aaron Gray wrote:> On Sat, Feb 21, 2009 at 7:14 PM, Nick Lewycky <nicholas at mxc.ca 
> <mailto:nicholas at mxc.ca>> wrote:
> 
>     Aaron Gray wrote:
>      > On Thu, Feb 19, 2009 at 6:55 PM, Nick Lewycky <nicholas at
mxc.ca
>     <mailto:nicholas at mxc.ca>
>      > <mailto:nicholas at mxc.ca <mailto:nicholas at
mxc.ca>>> wrote:
>      >
>      >     Aaron Gray wrote:
>      >      > On Thu, Feb 19, 2009 at 5:52 PM, Nick Lewycky
>     <nicholas at mxc.ca <mailto:nicholas at mxc.ca>
>      >     <mailto:nicholas at mxc.ca <mailto:nicholas at
mxc.ca>>
>      >      > <mailto:nicholas at mxc.ca <mailto:nicholas at
mxc.ca>
>     <mailto:nicholas at mxc.ca <mailto:nicholas at
mxc.ca>>>> wrote:
>      >      >
>      >      >     Aaron Gray wrote:
>      >      >      > Hi,
>      >      >      >
>      >      >      > I partly built LLVM on Cygwin yesterday and
it was
>     fine as
>      >     far as it
>      >      >      > went. But after doing a svn update today I am
>     getting the
>      >     following
>      >      >      > warning on every compile :-
>      >      >      >
>      >      >      >
>      >      >      >     llvm[3]: Compiling LowerAllocations.cpp
for
>     Debug build
>      >      >      >    
>     /usr/src/llvm/lib/Transforms/Utils/LowerAllocations.cpp:1:
>      >      >     warning:
>      >      >      >     -fPIC ignored for target (all code is
position
>      >     independent)
>      >      >      >
>      >      >      >
>      >      >      > This maybe happening on other targets too.
>      >      >
>      >      >     Thanks for the report. This is certainly due to my
change
>      >     last night to
>      >      >     make LLVM build as PIC by default.
>      >      >
>      >      > I was a little perplex at the warning as I could not
>     ascertain where
>      >      > thery were coming from and could see no obvious commit 
!:)
>      >      >
>      >      > Out of interest, could you point me to the patch or
>     commit, please.
>      >
>      >     r65019 / r65020:
>      >    
>    
http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20090216/073983.html
>      >    
>    
http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20090216/073984.html
>      >
>      > Can you please email me if and when it is fixed :)
> 
>     Should be fixed in r65229:
>     http://llvm.org/viewvc/llvm-project?view=rev&revision=65229
>     <http://llvm.org/viewvc/llvm-project?view=rev&revision=65229>
> 
> Cygwin is still giving "-fPIC ignored for target (all code is position
> independent)" warnings :(
*Really!*

Could you please rig Makefile.rules or something to print out the value 
of $(LLVM_ON_WIN32) ? The only way I can think of this happening is if 
that's erroneously false.

Nick
> I have tried from LLVM svn mainline.
>  
> Sorry that I did not get round to trying it earlier.
>  
> Aaron
>  
> 
> 
> ------------------------------------------------------------------------
> 
> _______________________________________________
> LLVM Developers mailing list
> LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev

Aaron Gray

2009-Feb-27 15:06 UTC

head link

[LLVMdev] -fPIC warning on every compile on Cygwin

On Fri, Feb 27, 2009 at 7:14 AM, Nick Lewycky <nicholas at mxc.ca> wrote:
> Aaron Gray wrote:
> > On Sat, Feb 21, 2009 at 7:14 PM, Nick Lewycky <nicholas at mxc.ca
> > <mailto:nicholas at mxc.ca>> wrote:
> >
> >     Aaron Gray wrote:
> >      > On Thu, Feb 19, 2009 at 6:55 PM, Nick Lewycky <nicholas
at mxc.ca
> >     <mailto:nicholas at mxc.ca>
>  >      > <mailto:nicholas at mxc.ca <mailto:nicholas at
mxc.ca>>> wrote:
> >      >
> >      >     Aaron Gray wrote:
> >      >      > On Thu, Feb 19, 2009 at 5:52 PM, Nick Lewycky
> >     <nicholas at mxc.ca <mailto:nicholas at mxc.ca>
> >      >     <mailto:nicholas at mxc.ca <mailto:nicholas at
mxc.ca>>
> >      >      > <mailto:nicholas at mxc.ca <mailto:nicholas
at mxc.ca>
> >     <mailto:nicholas at mxc.ca <mailto:nicholas at
mxc.ca>>>> wrote:
> >      >      >
> >      >      >     Aaron Gray wrote:
> >      >      >      > Hi,
> >      >      >      >
> >      >      >      > I partly built LLVM on Cygwin yesterday
and it was
> >     fine as
> >      >     far as it
> >      >      >      > went. But after doing a svn update today
I am
> >     getting the
> >      >     following
> >      >      >      > warning on every compile :-
> >      >      >      >
> >      >      >      >
> >      >      >      >     llvm[3]: Compiling
LowerAllocations.cpp for
> >     Debug build
> >      >      >      >
> >     /usr/src/llvm/lib/Transforms/Utils/LowerAllocations.cpp:1:
> >      >      >     warning:
> >      >      >      >     -fPIC ignored for target (all code
is position
> >      >     independent)
> >      >      >      >
> >      >      >      >
> >      >      >      > This maybe happening on other targets
too.
> >      >      >
> >      >      >     Thanks for the report. This is certainly due
to my
> change
> >      >     last night to
> >      >      >     make LLVM build as PIC by default.
> >      >      >
> >      >      > I was a little perplex at the warning as I could
not
> >     ascertain where
> >      >      > thery were coming from and could see no obvious
commit  !:)
> >      >      >
> >      >      > Out of interest, could you point me to the patch
or
> >     commit, please.
> >      >
> >      >     r65019 / r65020:
> >      >
> >
>
http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20090216/073983.html
> >      >
> >
>
http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20090216/073984.html
> >      >
> >      > Can you please email me if and when it is fixed :)
> >
> >     Should be fixed in r65229:
> >     http://llvm.org/viewvc/llvm-project?view=rev&revision=65229
> >    
<http://llvm.org/viewvc/llvm-project?view=rev&revision=65229>
> >
> > Cygwin is still giving "-fPIC ignored for target (all code is
position
> > independent)" warnings :(
>
> *Really!*
>
> Could you please rig Makefile.rules or something to print out the value
> of $(LLVM_ON_WIN32) ? The only way I can think of this happening is if
> that's erroneously false.
>
>Hi Nick,

I am not famuliar enought with the build system to do this.

Can you give me a resision number to check out before your changes so I can
get my code tested.

Then once I have done that I can tackel giving you some valid feedback.

Thanks,

Aaron
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Jay Foad

2009-Feb-27 16:24 UTC

head link

[LLVMdev] -fPIC warning on every compile on Cygwin

> Could you please rig Makefile.rules or something to print out the value
> of $(LLVM_ON_WIN32) ? The only way I can think of this happening is if
> that's erroneously false.
The configure script sets LLVM_ON_UNIX, not LLVM_ON_WIN32, for Cygwin:

  case $host in
  ...
  *-*-cygwin*)
    llvm_cv_link_all_option="-Wl,--whole-archive"
    llvm_cv_no_link_all_option="-Wl,--no-whole-archive"
    llvm_cv_os_type="Cygwin"
    llvm_cv_platform_type="Unix" ;;


case $llvm_cv_platform_type in
  Unix)

cat >>confdefs.h <<\_ACEOF
#define LLVM_ON_UNIX 1
_ACEOF

    LLVM_ON_UNIX=1

    LLVM_ON_WIN32=0

    ;;


Jay.

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