[Pw_forum] newbie - installation problem

Lorenzo Paulatto paulatto at sissa.it
Tue Mar 3 15:59:47 CET 2009

On Tue, 03 Mar 2009 15:44:12 +0100, Carlo Nervi <carlo.nervi at unito.it> wrote:
> When I type make all, ifort compile all, but it exit with the following
> message:
> ipo: warning #11041: unresolved iotk_print_kinds_x_
>          Referenced in /tmp/ipo_ifort86WxDo.o

Dear carlo,
QE configure script uses the default system archiver (ar) when using ifort compiler instead of intel's own wrapper (xiar); unluckily interprocedural optimization (IPO) does not work with ar.

You have two possible solutions:
1. disable IPO (by setting the -noipo in F90FLAGS in file make.sys)
2. use xiar instead of ar (by setting the AR variable to xiar in file make.sys)

Personally I don't think IPO gives a substantial performance increase, hence I just disable it most of the time (furthermore it's disabled by default on most ifort versions).


Lorenzo Paulatto
phone: +39 040 3787 511
skype: paulatz
www:   http://people.sissa.it/~paulatto/

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