Iwmmxt Cross-compiler Setup

[spartan]

I have a working GCC 3.2.3 / GLIBC 2.2.5 toolchain for statically-linked binaries. That is pretty much useless, as it does not emit iWMMXT instructions.

However, what do I have to do to force the make command to use the arm toolchain?

[spartan]

I also have a working GCC 3.4.4 / GLIBC 2.2.5 iWMMXt toolchain, build without patches through crosstool.

Testing the hello and hello2 applications, both linked and static, yielded the following results:

$ ./hello1
Hello, world!  LONG_MIN is -2147483648, PATH_MAX is 4096
$ ./hello1static
Illegal instruction
$ ./hello2
./hello2: error while loading shared libraries: libstdc++.so.6: cannot load shared object file: No such file or directory
$ ./hello2static
Illegal instruction

What does this mean?

[Da_Blitz]

did you issue your ./configure with a --build="your tool chain name here" and added CC="-mcpu=iwmmxt -march=iwmmxt" to tell it to use the iwmmx instruction,

just a side note but a program has to be written to use the iwmmxt instructions as they dont make up part  of the default instruction set (its actually a co processor hanging off the coprocessor bus and interfaced using the coprocessor minipulation instructions for arm processor) all the march and mcpu will do is take into acount the instructions avalible and cache sizes as well as perfromace info for the iwmmxt platform to get more perfromance out ot it, ie you dont want you compiler assuming you have 64KB of cache when you CPU has only 32KB for Instructions