Any Progress on s390x compile problem of gmp 4.2.4

Torbjorn Granlund tg at
Wed Feb 18 20:34:34 CET 2009

Rainer Dorsch <rdorsch at> writes:

  Nevertheless, the problem seems still to be there and I run last week in it. I 
  googled and found the mailthread. So let me follow-up. This is the output of 
  mclinx:firstsb /afs/bb/data/d3197/galaxy2/src/gmp-4.2.4+dfsg # ./config.guess
  mclinx:firstsb /afs/bb/data/d3197/galaxy2/src/gmp-4.2.4+dfsg #
We should try to make this work.  If somebody can respond to the
following questions, that would help.

Do these systems support a 32-bit ABI?  If they do, the compiler
should have an option controlling ABI.  Please try it, using something
trivial like hello.c.

What 64-bit multiply support do these system provide?  The 32-bit s390
systems have a signed 32x32->64 bit multiply.  GMP really needs a
64x64->128 bit multiply, preferably unsigned, to support the s390x

Which compiler predefines are defined in 64-bit mode?  If there is an
32-bit ABI, what symbols are predefined when that ABI is chosen?

In longlong.h, we test the following predefines:


I am not sure these symbols are the right ones, but they seem to work
for the 32-bit s390 systems.


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