[MacPorts] #46943: py27-gobject3 fails to build on MacOS 10.5.8 PPC; can fix problem with -fPIC

[MacPorts]

#46943: py27-gobject3 fails to build on MacOS 10.5.8 PPC; can fix problem with
-fPIC
--------------------------+-----------------------------
  Reporter:  paulccobb@…  |      Owner:  cal@…
      Type:  defect       |     Status:  new
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:  2.3.3
Resolution:               |   Keywords:  leopard powerpc
      Port:  py-gobject3  |
--------------------------+-----------------------------
Description changed by mf2k@…:

Old description:

> I found a few days ago that in trying to upgrade py27-gobject3 from
> 3.12.1_0 to 3.14.0_0, the build failed with the following error in
> main.log:
>
> ld: absolute addressing (perhaps -mdynamic-no-pic) used in
> _pygobject_constructv from .libs/_gi_la-gobjectmodule.o not allowed in
> slidable image. Use '-read_only_relocs suppress' to enable text relocs
> collect2: ld returned 1 exit status
>
> I can't claim to be an expert on MacPorts or on PowerPC build issues, but
> I've tried to understand what's going wrong, and offer the following info
> in case it helps.
>
> I found by experiment in the work/pygobject-3.14.0 directory (under
> macports/build) that if I insert the switch '-fPIC' in the CFLAGS for
> each Makefile, that makes the problem go away. As far as I understand the
> issue, PowerPC compilation has historically assumed -mdynamic_no_pic as
> the default; so if the rest of the build process wants pic, it has to be
> enabled explicitly.
>
> In case they're useful, I've attached two files that each capture the
> output of a 'make' run, invoked in the work/pygobject-3.14.0 directory
> without args: the first one ends with the build error, while the second
> has the -fPIC switch present in all Makefiles and appears to run to
> completion.

New description:

 I found a few days ago that in trying to upgrade py27-gobject3 from
 3.12.1_0 to 3.14.0_0, the build failed with the following error in
 main.log:

 {{{
 ld: absolute addressing (perhaps -mdynamic-no-pic) used in
 _pygobject_constructv from .libs/_gi_la-gobjectmodule.o not allowed in
 slidable image. Use '-read_only_relocs suppress' to enable text relocs
 collect2: ld returned 1 exit status
 }}}

 I can't claim to be an expert on MacPorts or on PowerPC build issues, but
 I've tried to understand what's going wrong, and offer the following info
 in case it helps.

 I found by experiment in the work/pygobject-3.14.0 directory (under
 macports/build) that if I insert the switch '-fPIC' in the CFLAGS for each
 Makefile, that makes the problem go away. As far as I understand the
 issue, PowerPC compilation has historically assumed -mdynamic_no_pic as
 the default; so if the rest of the build process wants pic, it has to be
 enabled explicitly.

 In case they're useful, I've attached two files that each capture the
 output of a 'make' run, invoked in the work/pygobject-3.14.0 directory
 without args: the first one ends with the build error, while the second
 has the -fPIC switch present in all Makefiles and appears to run to
 completion.

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Ticket URL: <https://trac.macports.org/ticket/46943#comment:2>
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