[gentoo-embedded] cross compiling libperl

[gentoo-embedded] cross compiling libperl

[Corey]

Are there any patches for cross compiling libperl available?

I'm running into (so far, at least one) issue where configure goes and attempts
to test things by creating a simple c program ('try.c'), which fails to run because
it compiled it using (in my particular case) i686-pc-linux-uclibc-gcc.


Here's the output from the configure, as run through my crossdev:

"I've tried to compile and run the following simple program:

#include <stdio.h>
int main() { printf("Ok\n"); return(0); }

I used the command:

        i686-pc-linux-uclibc-gcc -o try -O2 -DOVR_DBL_DIG=14 -I/usr/local/include -L/usr/local/lib try.c -lnsl -lgdbm -ldb -ldl -lm -lcrypt -lutil -lc
         ./try

and I got the following output:

/bin/sh: ./try: No such file or directory
The program compiled OK, but exited with status 127."


Here's the relevant portion from ./configure:

: coherency check
echo " "
echo "Checking your choice of C compiler and flags for coherency..." >&4
$cat > try.c <<'EOF'
#include <stdio.h>
int main() { printf("Ok\n"); return(0); }
EOF
set X $cc -o try $optimize $ccflags $ldflags try.c $libs
shift
$cat >try.msg <<'EOM'
I've tried to compile and run the following simple program:

EOM
$cat try.c >> try.msg

$cat >> try.msg <<EOM

I used the command:

        $*
        $run ./try

and I got the following output:

EOM



I'm wondering if this is a know issue and/or what's the best way of getting around it?

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[gentoo-embedded] Cross compiling libperl

[Petric Frank]

Hello,

i've read the mail from Corey <corey@...> (dd. 2006-11-20 03:13:19 GMT).

The problem is that the build process compiles a test program for the 
destination platform and afterwards it tries to execute it.
This will never work when cross compiling.

Are there any workarounds available (patches for the ebuild, etc.) ?

regards
  Petric
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Re: [gentoo-embedded] Cross compiling libperl

[Karl Hiramoto]

Petric Frank wrote:
> Hello,
>
> i've read the mail from Corey <corey@...> (dd. 2006-11-20 03:13:19 GMT).
>
> The problem is that the build process compiles a test program for the 
> destination platform and afterwards it tries to execute it.
> This will never work when cross compiling.
>
> Are there any workarounds available (patches for the ebuild, etc.) ?
>
> regards
>   Petric
>   

There are a lot of packages like this that come this way from upstream

Options that have worked for me
1.  modify the configure script and/or makefiles to not run the test program

2. In a few cases i complied gcc for my ARM platform, then compiled
natively..  I think perl was one of these.. It took hours to compile..

--
Karl.
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Re: [gentoo-embedded] Cross compiling libperl

[Christopher Friedt]

Alternatively, what I've done in the past, was actually natively compile 
badly behaved packages using Qemu/ARM.

This is naturally slightly slower.

Chris

Karl Hiramoto wrote:
> Petric Frank wrote:
>> Hello,
>>
>> i've read the mail from Corey <corey@...> (dd. 2006-11-20 03:13:19 GMT).
>>
>> The problem is that the build process compiles a test program for the 
>> destination platform and afterwards it tries to execute it.
>> This will never work when cross compiling.
>>
>> Are there any workarounds available (patches for the ebuild, etc.) ?
>>
>> regards
>>   Petric
>>   
> 
> There are a lot of packages like this that come this way from upstream
> 
> Options that have worked for me
> 1.  modify the configure script and/or makefiles to not run the test program
> 
> 2. In a few cases i complied gcc for my ARM platform, then compiled
> natively..  I think perl was one of these.. It took hours to compile..
> 
> --
> Karl.
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Re: [gentoo-embedded] Cross compiling libperl

[Mike Frysinger]

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On Monday 12 November 2007, Karl Hiramoto wrote:
> Options that have worked for me
> 1.  modify the configure script and/or makefiles to not run the test
> program

this isnt an option for perl ... it's 100% crap that is specific to perl.  
it's a large hand written script
-mike

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Re: [gentoo-embedded] Cross compiling libperl

[Mike Frysinger]

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On Monday 12 November 2007, Petric Frank wrote:
> The problem is that the build process compiles a test program for the
> destination platform and afterwards it tries to execute it.
> This will never work when cross compiling.
>
> Are there any workarounds available (patches for the ebuild, etc.) ?

only workaround for perl is to get a binary or build it natively

i have a work-in-progress patch on wh0rd.org's svn
-mike

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Re: [gentoo-embedded] Cross compiling libperl

[Petric Frank]

Hello,

On Montag, 19. November 2007, Mike Frysinger wrote:
> > The problem is that the build process compiles a test program for the
> > destination platform and afterwards it tries to execute it.
> > This will never work when cross compiling.
> >
> > Are there any workarounds available (patches for the ebuild, etc.) ?
>
> only workaround for perl is to get a binary or build it natively
>
> i have a work-in-progress patch on wh0rd.org's svn

I've found it. Shall i do a test with it or is it currently too unstable ?

regards
  Petric
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Re: [gentoo-embedded] Cross compiling libperl

[Mike Frysinger]

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On Monday 19 November 2007, Petric Frank wrote:
> On Montag, 19. November 2007, Mike Frysinger wrote:
> > > The problem is that the build process compiles a test program for the
> > > destination platform and afterwards it tries to execute it.
> > > This will never work when cross compiling.
> > >
> > > Are there any workarounds available (patches for the ebuild, etc.) ?
> >
> > only workaround for perl is to get a binary or build it natively
> >
> > i have a work-in-progress patch on wh0rd.org's svn
>
> I've found it. Shall i do a test with it or is it currently too unstable ?

i'm pretty sure the code that is in there is fine, but it's incomplete ... so 
unless you feel like hackin on the patch to flesh it out more, dont bother
-mike

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Re: [gentoo-embedded] Cross compiling libperl

[Petric Frank]

Hello Mike,

On Dienstag, 20. November 2007, Mike Frysinger wrote:
> On Monday 19 November 2007, Petric Frank wrote:
> > On Montag, 19. November 2007, Mike Frysinger wrote:
> > > > The problem is that the build process compiles a test program for the
> > > > destination platform and afterwards it tries to execute it.
> > > > This will never work when cross compiling.
> > > >
> > > > Are there any workarounds available (patches for the ebuild, etc.) ?
> > >
> > > only workaround for perl is to get a binary or build it natively
> > >
> > > i have a work-in-progress patch on wh0rd.org's svn
> >
> > I've found it. Shall i do a test with it or is it currently too unstable
> > ?
>
> i'm pretty sure the code that is in there is fine, but it's incomplete ...
> so unless you feel like hackin on the patch to flesh it out more, dont
> bother -mike

Actually i am patching on different areas. So at the moment i haven't the time 
to begin another war ...

Could you leave me a note when you think the patch is ready to be used ?

regards
  Petric
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Re: [gentoo-embedded] Cross compiling libperl

[Mike Frysinger]

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On Tuesday 20 November 2007, Petric Frank wrote:
> Could you leave me a note when you think the patch is ready to be used ?

when it's ready, it'll go into the tree
-mike

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