[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

971111: configure scripts thinks it's cross_compiling

This archive contains answers to questions sent to Unidata support through mid-2025. Note that the archive is no longer being updated. We provide the archive for reference; many of the answers presented here remain technically correct, even if somewhat outdated. For the most up-to-date information on the use of NSF Unidata software and data services, please consult the Software Documentation first.

  • Subject: 971111: configure scripts thinks it's cross_compiling
  • Date: Tue, 11 Nov 97 10:28:30 -0700
Ladean,

>Date: Mon, 10 Nov 97 19:27:15 -0700 
>From: "Ladean R. McKittrick" <ladeanm@cyclops>
>Organization: . 
>To: address@hidden
>Subject: cross_compiling 
>Keywords: 199711110230.TAA05658 

In the above message, you wrote:

> I am trying to compile a program that we received from Sandia NL.
> This program uses netCDF and when the configure script is executed, it  
> returns the following error:
> 
> > configure: error: can not run test program while cross compiling

This indicates a severe problem with the development environment: the
configure script was unable to compile-and-link a trivial program.

> and the following config.log:
> 
> > This file contains any messages produced by compilers while
> > running configure, to aid debugging if configure makes a mistake.
> >
> > configure:1156: c89 -E  -D_ALL_SOURCE conftest.c >/dev/null 2>conftest.out
> > configure:1197: c89 -E  -D_ALL_SOURCE conftest.c >/dev/null 2>conftest.out
> > configure:1663: c89 -o conftest -O  -D_ALL_SOURCE  conftest.c  1>&5

The above looks OK.  Was that *all* of "config.log"?

> 
> I am trying to compile this code on an IBM RS6000 with AIX 4.2.
> 
> As I understand it, the cross_compiling message indicates that the configure  
> script was unable to compile a simple Hello World type c program.

That's correct.

> However, if  
> I edit the configure script and put a simple printf statement in the short  
> program, e.g.
> 
> > cat > conftest.$ac_ext <<EOF
> > #line 1659 "configure"
> > #include "confdefs.h"
> > main(){printf("Hello World\n"); return(0);}
> > EOF
> and comment out the remove
> > #rm -fr conftest*
> 
> I end up with a conftest program that prints hello world after the configure  
> script has "aborted"; however, I notice this same program does not execute in 
>  
> the logical test:
> > if test -s conftest && (./conftest; exit) 2>/dev/null; then
> 
> I know enough about programming to be dangerous but beyond that I lack the  
> insight that I need to solve this problem by myself.
> 
> Is there any chance you can help me out?
> 
>          Thanks
>       
>                Ladean McKittrick

The reason that the configure script thought it was cross-compiling
should be in the file "config.log".  The one you sent was suspiciously
small.  Is there more?

--------
Steve Emmerson   <http://www.unidata.ucar.edu>