pkg/42157: math/lapack versus gfortran

[dmcmahill%NetBSD.org@localhost]

>Number:         42157
>Category:       pkg
>Synopsis:       math/lapack needs gfortran fixes
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    pkg-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Tue Oct 06 17:45:00 +0000 2009
>Originator:     Dan McMahill
>Release:        NetBSD 5.0_STABLE
>Organization:
NetBSD
        
>Environment:
        
        
System: NetBSD pkghacker 5.0_STABLE NetBSD 5.0_STABLE (PKGHACKER) #1: Sat Jun 
20 20:42:58 EDT 2009 
root@pkghacker:/usr/cvs/src/sys/arch/i386/compile/PKGHACKER i386
Architecture: i386
Machine: i386
>Description:

math/lapack has 3 minor issues which need to be addressed to be compatible with 
gfortran (available in lang/gcc44).
As an aside, we need math/lapack to work with gfortran because some programs 
like scilab require gfortran for their
newer releases.

1)  we now need to use the intrinsic instead of external etime().

In patches/patch-ac we'd change EXT_ETIME to INT_ETIME.  However, this may need 
to be a switch
based on the actual fortran compiler used.  

2)  early on in the build on i386, the single precision tests hang.  Adding 
-ffloat-store
to FFLAGS in math/lapack/Makefile like:

FFLAGS+=                -ffloat-store

gets this to work again, but this is both i386 specific and gcc specific.

3) I didn't have a problem with this, but I noticed that patch-ad has:

.f.o:
       ${LIBTOOL} --mode=compile --tag=CC ${FC} ${FFLAGS} -c $<


in particular note that we are using the CC tag to libtool with *fortran*.  
Shouldn't that be
the F77 tag?  Of course that assumes we even had fortran installed properly 
before libtool which is
a bit of a chicken and egg issue.

        
>How-To-Repeat:

/etc/mk.conf:

CC=/opt/gcc44/gcc44/bin/gcc
CXX=/opt/gcc44/gcc44/bin/g++
FC=/opt/gcc44/gcc44/bin/gfortran

I built the gcc44 package into PREFIX=/opt/gcc44 and then pointed to this for 
my pkgsrc builds.

        
>Fix:

Figure out how to automatically use the old behavior versus the patched code 
here depending on the
fortran compiler in use.

        

>Unformatted:
        
        
 pkgsrc as of 2009-10-06