link-editor thinks ECL library contains non-pic code on *all* Solaris/OpenSolaris releases - causes problems on 64-bit

[sagetrac-drkirkby]

As noted at #9099, Maxima fails to build properly on OpenSolaris x64. The ticket then went onto discuss specific doctest failures on 32-bit Solaris n x86.

However, the reason Maxima was not working on OpenSolaris is totally unrelated and much wider. It has nothing to do with Maxima, but is almost certainly an issue with ECL.

Hence it seemed wise to open a ticket specific for this.

The problem is that the link-editor thinks the ecl shared library contains text relocations, which is why there was an error like

ld.so.1: ecl: fatal: relocation error: R_AMD64_PC32: file /export/home/drkirkby/sage-4.4.2/local/lib//libecl.so: symbol main: value 0x22800097de04 does not fit

There's a command given on this Sun blog

http://blogs.sun.com/rie/entry/my_relocations_don_t_fit

which will show libraries with this problem.

== OpenSolaris on x64 ==

I built the latest ECL snapshot outside of Sage, and run the suggested command on the ECL library. Note, this a different version of ECL built at a later date.

drkirkby@hawk:/tmp/ecl$ ./configure 
drkirkby@hawk:/tmp/ecl$ make

then the all important:

drkirkby@hawk:/tmp/ecl$ elfdump -d ./build/libecl.so |  fgrep TEXTREL
      [23]  TEXTREL           0
      [31]  FLAGS             0x4                 [ TEXTREL ]

which indicates a problem - there should be no output from that.

It's also suggested to compile with some debugging information:

$ export LD_OPTIONS=-Dreloc,detail 
$ unset MAKE
$ make

A full log is attached of that.

Upstream: Fixed upstream, in a later stable release.

Component: porting: Solaris

Reviewer: David Kirkby

Issue created by migration from https://trac.sagemath.org/ticket/9840

[sagetrac-drkirkby]

Attachment: complete-log-of-OpenSolaris-86-built.txt.gz

Build log on OpenSolaris, when using debugging options to show text relocations.

[sagetrac-drkirkby]

comment:2

It should be noted this problem exists on every combination of Solaris/OpenSolaris system tested

• 32-bit Solaris 10 on SPARC
• 64-bit Solaris 10 on SPARC
• 32-bit Solaris 10 on x86
• 64-bit Solaris 10 on x86
• 32-bit OpenSolaris on x86
• 64-bit OpenSolaris on x86

However, on 32-bit builds, the text relocation issues are not actually causing any problems, so we can live with that. On 64-bit builds, it completely screws things up.

Similar issues with text relocation has been observed with:

• Cliquer - solved with a change of compiler flags (Change Cliquer compiler flags on Solaris to build without text relocations. #9871)
• PolyBoRi - solved in the latest upstream release (PolyBoRi incorrectly reports a GNU linker is used with gcc and produces libraries with text relocations. #9872)
• R - unsolved (fatal relocation error installing R on OpenSolaris x64 with gcc (OK with Sun Studio). #9040)

So it's only R and ECL which have this problem outstanding.

Dave

[sagetrac-drkirkby]

comment:3

This has ben fixed upstream, and is the result of using a GCC extension (computed gotos), which don't seem to work properly on Solaris. As yet, I am unaware what the fix is, though I've been told its been fixed.

Dave

[sagetrac-drkirkby]

comment:4

This problem was fixed by #10766, so can be closed as fixed in sage-4.7.alpha1

[sagetrac-drkirkby]

Upstream: Fixed upstream, in a later stable release.

[jdemeyer]

Reviewer: David Kirkby