[mpich-discuss] installation of mpich-1.2.7p1, the suffix of f90 source files and the iostream.h header file

[Cezary Śliwa]

This is a copy of a message sent to the mpi-maint mailing list.
I am not sure whether posting this to mpich-discuss is appropriate
and apologize if it's not.


Hello,

I try to install mpich-1.2.7p1 on CentOS 4 x86_64 using GCC 4.3.4 
(compiler installed by myself). It seems that the configure code in 
src/fortran that detects the extension of Fortran 90 source files does 
not work. The code is F90_SUFFIX="$ac_f90ext", but ac_f90ext is not set. 
Indeed, the earlier code tries .f as the extension 
(ac_ext=${ac_f90ext-f}) and if this works, ac_f90ext remains unset. The 
f90 extension is tried and assigned to ac_f90ext only if this is not the 
case. To workaround this, I have set ac_f90ext=f90.

What bothers me is that one of a few configure runs worked fine (the 
example Fortran programs compiled correctly). I cannot reproduce this (I 
am not sure if I have changed some environment variables since then). My 
problem is that I am not an autoconf guru and it seems the autoconf 
input files are missing (or the configure scripts are not in sync with 
them). This all looks complicated and I don't know if ac_f90ext was not 
meant to be set by some other configure script and cached. If it was, 
something prevents this to happen (possibly non-deterministically).

Finally, the C++ code uses <iostream.h>. This header file is deprecated 
for many years, and is missing from GCC 4.3.4. I attach a patch do 
migrate to <iostream> (the relevant comments need a fix also; I edited 
the configure scripts manually, I know they are generated).

Regards,
Cezary Sliwa


GCC is installed in /opt/gcc/4.3.4

export CC='gcc'
export FC='gfortran'
export F77_GETARGDECL=" "
export F90='gfortran'
export CXX='g++'
export LDFLAGS='-Wl,-rpath,/opt/gcc/4.3.4/lib64'
export CLINKER='gcc'
export FLINKER='gfortran'
export F90LINKER='gfortran'
export CXXLINKER='g++'
export RSHCOMMAND=/usr/bin/rsh

./configure --with-device=ch_p4 --prefix=/opt/mpich/gnu_4.3.4_64/ch_p4 
--with-common-prefix=/opt/mpich/gnu_4.3.4_64 --enable-f90 
--enable-f90modules --with-romio="-with-file-system=ufs+nfs" 
--with-comm=shared --mpe_opts="--with-java2=/opt/jdk 
--x-libraries=/usr/X11R6/lib64 --x-includes=/usr/X11R6/include 
--enable-viewers"



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