diff mbox

[v2,3/3] perl-net-ssleay: fix build

Message ID 1404406406-9209-3-git-send-email-francois.perrad@gadz.org
State Rejected
Headers show

Commit Message

Francois Perrad July 3, 2014, 4:53 p.m. UTC
the following error occurs after the previous patch
    arm-none-linux-gnueabi-gcc: error: unrecognized command line option '-shared '

so, force LDDLFLAGS without quote

note: previously LDDLFLAGS was correct
Signed-off-by: Francois Perrad <francois.perrad@gadz.org>
---
 package/perl-net-ssleay/perl-net-ssleay.mk | 5 +++++
 1 file changed, 5 insertions(+)

Comments

Thomas Petazzoni July 3, 2014, 6:20 p.m. UTC | #1
Dear Francois Perrad,

See: this patch has exactly the same title as the previous one. That's
a good indication that the title is not sufficiently distinctive.

On Thu,  3 Jul 2014 18:53:26 +0200, Francois Perrad wrote:
> the following error occurs after the previous patch
>     arm-none-linux-gnueabi-gcc: error: unrecognized command line option '-shared '
> 
> so, force LDDLFLAGS without quote
> 
> note: previously LDDLFLAGS was correct
> Signed-off-by: Francois Perrad <francois.perrad@gadz.org>
> ---
>  package/perl-net-ssleay/perl-net-ssleay.mk | 5 +++++
>  1 file changed, 5 insertions(+)
> 
> diff --git a/package/perl-net-ssleay/perl-net-ssleay.mk b/package/perl-net-ssleay/perl-net-ssleay.mk
> index 7e4c194..48ff715 100644
> --- a/package/perl-net-ssleay/perl-net-ssleay.mk
> +++ b/package/perl-net-ssleay/perl-net-ssleay.mk
> @@ -13,4 +13,9 @@ PERL_NET_SSLEAY_LICENSE_FILES = LICENSE
>  
>  PERL_NET_SSLEAY_CONF_ENV = OPENSSL_PREFIX=$(STAGING_DIR)/usr
>  
> +define PERL_NET_SSLEAY_FIX_MAKEFILE
> +	$(SED) 's/^LDDLFLAGS =.*/LDDLFLAGS = -shared/' $(@D)/Makefile
> +endef
> +PERL_NET_SSLEAY_POST_CONFIGURE_HOOKS += PERL_NET_SSLEAY_FIX_MAKEFILE

What about BR2_PREFER_STATIC_LIB=y configurations, as Peter asked in
the review of your initial patch?

Thanks!

Thomas
Yann E. MORIN July 13, 2014, 1:35 p.m. UTC | #2
François, All,

On 2014-07-03 18:53 +0200, Francois Perrad spake thusly:
> the following error occurs after the previous patch
>     arm-none-linux-gnueabi-gcc: error: unrecognized command line option '-shared '
> 
> so, force LDDLFLAGS without quote
> 
> note: previously LDDLFLAGS was correct
> Signed-off-by: Francois Perrad <francois.perrad@gadz.org>

I've dropped this patch from my resend [0], and marked it Rejected in
the patchwork, because I submitted an alternative patch, and C extensions
to Perl can not be built static anyway.

[0] http://lists.busybox.net/pipermail/buildroot/2014-July/101699.html

Regards,
Yann E. MORIN.

> ---
>  package/perl-net-ssleay/perl-net-ssleay.mk | 5 +++++
>  1 file changed, 5 insertions(+)
> 
> diff --git a/package/perl-net-ssleay/perl-net-ssleay.mk b/package/perl-net-ssleay/perl-net-ssleay.mk
> index 7e4c194..48ff715 100644
> --- a/package/perl-net-ssleay/perl-net-ssleay.mk
> +++ b/package/perl-net-ssleay/perl-net-ssleay.mk
> @@ -13,4 +13,9 @@ PERL_NET_SSLEAY_LICENSE_FILES = LICENSE
>  
>  PERL_NET_SSLEAY_CONF_ENV = OPENSSL_PREFIX=$(STAGING_DIR)/usr
>  
> +define PERL_NET_SSLEAY_FIX_MAKEFILE
> +	$(SED) 's/^LDDLFLAGS =.*/LDDLFLAGS = -shared/' $(@D)/Makefile
> +endef
> +PERL_NET_SSLEAY_POST_CONFIGURE_HOOKS += PERL_NET_SSLEAY_FIX_MAKEFILE
> +
>  $(eval $(perl-package))
> -- 
> 1.9.1
> 
> _______________________________________________
> buildroot mailing list
> buildroot@busybox.net
> http://lists.busybox.net/mailman/listinfo/buildroot
Francois Perrad July 14, 2014, 7:52 p.m. UTC | #3
2014-07-13 15:35 GMT+02:00 Yann E. MORIN <yann.morin.1998@free.fr>:
> François, All,
>
> On 2014-07-03 18:53 +0200, Francois Perrad spake thusly:
>> the following error occurs after the previous patch
>>     arm-none-linux-gnueabi-gcc: error: unrecognized command line option '-shared '
>>
>> so, force LDDLFLAGS without quote
>>
>> note: previously LDDLFLAGS was correct
>> Signed-off-by: Francois Perrad <francois.perrad@gadz.org>
>
> I've dropped this patch from my resend [0], and marked it Rejected in
> the patchwork, because I submitted an alternative patch, and C extensions
> to Perl can not be built static anyway.
>
> [0] http://lists.busybox.net/pipermail/buildroot/2014-July/101699.html
>

On my box, with all patches already applied in the trunk, I still need
this patch.

François

> Regards,
> Yann E. MORIN.
>
>> ---
>>  package/perl-net-ssleay/perl-net-ssleay.mk | 5 +++++
>>  1 file changed, 5 insertions(+)
>>
>> diff --git a/package/perl-net-ssleay/perl-net-ssleay.mk b/package/perl-net-ssleay/perl-net-ssleay.mk
>> index 7e4c194..48ff715 100644
>> --- a/package/perl-net-ssleay/perl-net-ssleay.mk
>> +++ b/package/perl-net-ssleay/perl-net-ssleay.mk
>> @@ -13,4 +13,9 @@ PERL_NET_SSLEAY_LICENSE_FILES = LICENSE
>>
>>  PERL_NET_SSLEAY_CONF_ENV = OPENSSL_PREFIX=$(STAGING_DIR)/usr
>>
>> +define PERL_NET_SSLEAY_FIX_MAKEFILE
>> +     $(SED) 's/^LDDLFLAGS =.*/LDDLFLAGS = -shared/' $(@D)/Makefile
>> +endef
>> +PERL_NET_SSLEAY_POST_CONFIGURE_HOOKS += PERL_NET_SSLEAY_FIX_MAKEFILE
>> +
>>  $(eval $(perl-package))
>> --
>> 1.9.1
>>
>> _______________________________________________
>> buildroot mailing list
>> buildroot@busybox.net
>> http://lists.busybox.net/mailman/listinfo/buildroot
>
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Yann E. MORIN July 14, 2014, 10:43 p.m. UTC | #4
François, All,

On 2014-07-14 21:52 +0200, François Perrad spake thusly:
> 2014-07-13 15:35 GMT+02:00 Yann E. MORIN <yann.morin.1998@free.fr>:
> > On 2014-07-03 18:53 +0200, Francois Perrad spake thusly:
> >> the following error occurs after the previous patch
> >>     arm-none-linux-gnueabi-gcc: error: unrecognized command line option '-shared '
> >>
> >> so, force LDDLFLAGS without quote
> >>
> >> note: previously LDDLFLAGS was correct
> >> Signed-off-by: Francois Perrad <francois.perrad@gadz.org>
> >
> > I've dropped this patch from my resend [0], and marked it Rejected in
> > the patchwork, because I submitted an alternative patch, and C extensions
> > to Perl can not be built static anyway.
> 
> On my box, with all patches already applied in the trunk, I still need
> this patch.

Ah, I see. I re-tested here, and indeed, it does perl-net-ssleay does
not build anymore.

I swear I was able to build it before I removed that patch... :-(

However, I have investigated a bit, and here are my findings:

  - our pkg-perl simply calls 'perl' to run the configure steps
  - this calls to the host system's perl
  - it also passes (among many other flags)::
        --config lddlflags="-shared $$(TARGET_LDFLAGS)"
  - this gets shoehorned into the generated Makefile as:
        LDDLFLAGS = '-shared '
  - which, when calling gcc for the link step, is then passed as:
        ...-gcc  '-shared ' ...
  - which is interpreted by gcc as the option '-shared ', so with a
    trailing space.

Removing the -shared from the configure steps yields a Makefile with:
        LDDLFLAGS = -shared -L/usr/local/lib -fstack-protector

Notice how there is no longer any single-quote around the value. And
now, it builds!

However, there is an unwanted -L/usr/local/lib option, which is properly
wrong, since we're doing cross-compilation. So, where does it come from?

Well, remember we're calling the host system's perl. On my system, I was
able to track the definition of LDDLFALGS to this file:
    /usr/lib/perl/5.18.2/Config_heavy.pl

which aptly contains:
    lddlflags='-shared -L/usr/local/lib -fstack-protector'

Changing the 'local' in there by 'YEM' would yield a Makefile for
perl-net-ssleay with, guess what? The following:
    LDDLFLAGS = -shared -L/usr/YEM/lib -fstack-protector

Bingo!

But why doesn't it take the value we pass on the configure line? Ah, for
my config, $(TARGET_LDFLAGS) is empty. So, it seems that if we pass an
empty value to --lddlflags, then it uses the default value specified in
the installation's files. That's not good...

So, it seems we would need to do one of the following:

  - find a way to pass a no-op, non-empty value to lddlflags, or
  - munge all generated Makefile so they no longer have paths to the
    host system libs/includes, or
  - tell the host perl not to use system paths, but I guess perl is not
    well equipped to be gentle to cross-compiletion, or
  - build our own host-perl and munge its installed files so they point
    to $(STAGING_DIR) (instead of $(HOST_DIR), probably)

Heck, I think the first option is the quickest as a workaround, but that
the latest is the safest, although the most complex. I doubt the third
would be that easy, while with the second option, we may miss
something... :-(

In any case, the -shared value in the configure steps is absolutely not
needed (and it breaks the build!) I'm testing the other extensions now
to see if we can really remove it...

BTW, all the above is also valid for LDFLAGS, sicne mine also contain an
option -L/usr/local/lib .

Regards,
Yann E. MORIN.
Yann E. MORIN July 14, 2014, 11:22 p.m. UTC | #5
François, All,

On 2014-07-15 00:43 +0200, Yann E. MORIN spake thusly:
> On 2014-07-14 21:52 +0200, François Perrad spake thusly:
> > 2014-07-13 15:35 GMT+02:00 Yann E. MORIN <yann.morin.1998@free.fr>:
> > > On 2014-07-03 18:53 +0200, Francois Perrad spake thusly:
> > >> the following error occurs after the previous patch
> > >>     arm-none-linux-gnueabi-gcc: error: unrecognized command line option '-shared '
> > >>
> > >> so, force LDDLFLAGS without quote
> > >>
> > >> note: previously LDDLFLAGS was correct
> > >> Signed-off-by: Francois Perrad <francois.perrad@gadz.org>
> > >
> > > I've dropped this patch from my resend [0], and marked it Rejected in
> > > the patchwork, because I submitted an alternative patch, and C extensions
> > > to Perl can not be built static anyway.
> > 
> > On my box, with all patches already applied in the trunk, I still need
> > this patch.
> 
> Ah, I see. I re-tested here, and indeed, it does perl-net-ssleay does
> not build anymore.
> 
> I swear I was able to build it before I removed that patch... :-(

OK, that's probably because I had removed -shared fron pkg-perl.mk and
forgot about it.

> However, I have investigated a bit, and here are my findings:
> 
>   - our pkg-perl simply calls 'perl' to run the configure steps
>   - this calls to the host system's perl
>   - it also passes (among many other flags)::
>         --config lddlflags="-shared $$(TARGET_LDFLAGS)"

I tried to set TARGET_LDFLAGS="-g" since -g is simply ignored by ld, and
I left the -shared in lddlflags on the configure line, but then, here's
what I got:
    arm-linux-gnueabihf-gcc: error: unrecognized command line option ‘-shared -g’

Bummer! So, if we pass more than one option to --lddlflags, the perl
infra completely derails, and sets LDDLFLAGS in the Makefile, to:
    LDDLFLAGS = '-shared -g'

Bad, real bad... :-(

OK, let's see what happens to other extensions. What about
perl-mojolicious? Here's what LDDLFLAGS looks like with -shared on the
configure line, and TARGET_LDFLAGS=-g:
    LDDLFLAGS = -shared -g

Oooookay... And other extensions are OK, too.

So, that's not the perl infra that is brain-dead, that's really
perl-net-ssleay which is completely f*cked up... :-(

OK, I'll revive your patch, with a few quirks...

Regards,
Yann E. MORIN.
Yann E. MORIN July 14, 2014, 11:49 p.m. UTC | #6
François, All,

On 2014-07-15 01:22 +0200, Yann E. MORIN spake thusly:
> On 2014-07-15 00:43 +0200, Yann E. MORIN spake thusly:
> > On 2014-07-14 21:52 +0200, François Perrad spake thusly:
> > > 2014-07-13 15:35 GMT+02:00 Yann E. MORIN <yann.morin.1998@free.fr>:
> > > > I've dropped this patch from my resend [0], and marked it Rejected in
> > > > the patchwork, because I submitted an alternative patch, and C extensions
> > > > to Perl can not be built static anyway.
> > > On my box, with all patches already applied in the trunk, I still need
> > > this patch.
> OK, I'll revive your patch, with a few quirks...

And the new patch has been posted, now:
    http://patchwork.ozlabs.org/patch/369784/

Regards,
Yann E. MORIN.
diff mbox

Patch

diff --git a/package/perl-net-ssleay/perl-net-ssleay.mk b/package/perl-net-ssleay/perl-net-ssleay.mk
index 7e4c194..48ff715 100644
--- a/package/perl-net-ssleay/perl-net-ssleay.mk
+++ b/package/perl-net-ssleay/perl-net-ssleay.mk
@@ -13,4 +13,9 @@  PERL_NET_SSLEAY_LICENSE_FILES = LICENSE
 
 PERL_NET_SSLEAY_CONF_ENV = OPENSSL_PREFIX=$(STAGING_DIR)/usr
 
+define PERL_NET_SSLEAY_FIX_MAKEFILE
+	$(SED) 's/^LDDLFLAGS =.*/LDDLFLAGS = -shared/' $(@D)/Makefile
+endef
+PERL_NET_SSLEAY_POST_CONFIGURE_HOOKS += PERL_NET_SSLEAY_FIX_MAKEFILE
+
 $(eval $(perl-package))