Differences in GCC and ICC compiled objects, GCC relocations broken?

[J K]

 Posted in the Intel forums but this may be more of a GCC issue.
 Please advise if I should post elsewhere.

 Compiling a C module in with a large app (>2GB data) and getting
relocatable errors with GCC and
 not ICC.

./classification_dpr_BB.o: In function `BB_detection_dpr':
/homedata/johnk/dpr/src_
20120126/DD2_V2.20120126/src/./
classification_dpr_BB.c:118: relocation truncated to fit:
R_X86_64_PC32 against `.bss'

 Can anyone familiar with the output of readelf see why the GCC
 object is not relocatable and the ICC one is? Would another tool
 be more suitable?

icc -I../include -g -v -sox -fPIC -mcmodel=medium -DDEBUG  -c
./classification_dpr_BB.c
cc -I../include -g -v -fPIC -mcmodel=medium -DDEBUG  -c
./classification_dpr_BB.c

  This module does not use more than 2GB data itself, I just need it
to be linked with
  code that does, so -fPIC.  I left off the medium memory model switch
on both with no impact.
  Everything is static except for the -shared-intel -mcmodel=medium
on the main link (ifort is used).

  Could it have something to do with the relocation types? Are there
switches to GCC to force relocations
  like ICC?

GCC
Relocation section '.rela.text' at offset 0xd040 contains 449 entries:
 Offset          Info           Type           Sym. Value    Sym.
Name + Addend
00000000004e  001700000002 R_X86_64_PC32     0000000000000000 .rodata
+ fffffffffffffffc
00000000008e  000400000002 R_X86_64_PC32     0000000000000000 .bss +
1e5c
0000000000bc  000400000002 R_X86_64_PC32     0000000000000000 .bss +
105c


ICC
Relocation section '.rela.text' at offset 0xf222 contains 732 entries:
 Offset          Info           Type           Sym. Value    Sym.
Name + Addend
000000000030  00780000001a R_X86_64_GOTPC32  0000000000000000
_GLOBAL_OFFSET_TABLE_ + fffffffffffffffc
000000000036  000600000019 R_X86_64_GOTOFF64 0000000000000000
_2il0floatpacket.15 + 0
000000000057  000700000019 R_X86_64_GOTOFF64 0000000000000008
_2il0floatpacket.16 + 0
00000000009f  00780000001a R_X86_64_GOTPC32  0000000000000000
_GLOBAL_OFFSET_TABLE_ + fffffffffffffffc

gcc (GCC) 4.1.2 20080704 (Red Hat 4.1.2-51)
icc (ICC) 11.1 20100806

 The full output of readelf -all are at these links.

ICC
http://www.box.com/s/2iqnqydmi0mdz52xs9ac

GCC
http://www.box.com/s/jjcgq1x2s5ybpg7s9b6g

Thanks for any help.