problem building libffi on x86-10 (fatal link error)

[Riccardo Mottola]

Hi,

as Laurent suggested, I wanted to try to build libffi 5 with dfferent 
compilers.

The first thing I did is build the package "as is" on unstable10x

mgar fetch makesum configure build

<...>
libtool: link: /opt/SUNWspro/bin/cc -G -h libffi.so.5 -o 
.libs/libffi.so.5.0.10  src/.libs/debug.o src/.libs/prep_cif.o 
src/.libs/types.o src/.libs/raw_api.o src/.libs/java_raw_api.o 
src/.libs/closures.o src/x86/.libs/ffi64.o src/x86/.libs/unix64.o 
src/x86/.libs/ffi.o src/x86/.libs/sysv.o   -L/opt/csw/lib/64 -lc -m64 
-xarch=sse2 -m64 -xarch=sse2
ld: fatal: file src/x86/.libs/unix64.o: section [4].eh_frame: section 
type is SHT_PROGBITS: expected SHT_AMD64_UNWIND
Makefile:790: recipe for target 'libffi.la' failed

May I assume that the standard recipe is broken? What could that be? I 
suppose the package at least used to build
The build is happening with the Sun compiler, as expected.

This comment in the Makefile is not reassuring:
# Fix needed for amd64 using SOS compiler
# found at http://software.intel.com/en-us/forums/showthread.php?t=56652
# originally for icc, but at least get the stuff to compile

we are on amd64, aren't we?

further question: the library is said to be "ELF 32-bit LSB dynamic lib 
80386 Version 1 [FPU]'
which I think is fie but I think is not amd64.
In the makefile I find:
BUILD64_LIBS_ONLY = 1

can you shed some light? I am confused.

Riccardo