4 - You need GCC 3.4 or later to compile the s390 port.
5 - A working combination of autotools is required.
6 - To run valgrind a z900 machine or any later model is needed.
11 - 31-bit client programs are not supported.
12 - Hexadecimal floating point is not supported.
13 - Decimal floating point is not supported yet.
14 - Currently, only memcheck, massif, lackey, and none are supported
15 - helgrind and drd seem to work on SLES10,11 and RHEL5,6 on z9,z10 and z196
16 but might fail on other hardware/software combinations.
17 - Some gcc versions use mvc to copy 4/8 byte values. This will affect some
18 debug messages. Valgrind will complain about 4 or 8 one-byte reads/writes
19 instead of just 1 read/write.
20 - exp-ptrcheck and callgrind are not supported.
25 Applications should be compiled with -fno-builtin to avoid
26 false positives due to builtin string operations when running memcheck.
31 (1) Linux for zSeries ELF ABI Supplement
32 http://refspecs.linuxfoundation.org/ELF/zSeries/index.html
33 (2) z/Architecture Principles of Operation
34 http://publibfi.boulder.ibm.com/epubs/pdf/dz9zr008.pdf
35 (3) z/Architecture Reference Summary
36 http://publibfi.boulder.ibm.com/epubs/pdf/dz9zs006.pdf