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951220: netcdf-2.4-beta5.tar.Z

David,

>Date: Wed, 20 Dec 1995 11:36:04 +1100 (EST) 
>From: address@hidden (David Micklethwaite)
>Organization: Cray Research Australia
>Subject: Re: 951219: netcdf-2.4-beta5.tar.Z 
>Keywords: 199512190336.AA09346

In the above message you wrote:

> Thnaks for the prompt reply. Here is what happened when I followed your
> step by step directions - it didn't work but maybe there is a further
> clue about what is going wrong. 
> 
> I guess all I need out of this build is the library and wonder hwether I
> can manually go to the libsrc directory and say "make" there?

You won't be able to go into the libsrc/ subdirectory and execute a
`make' there because the makefile will not have been built by the
configure script.

> 
> > We have to determine why the configure script thinks you're
> > cross-compiling.  Try the following:
> > 
> >     1.  Go to the top-level source directory.
...

Looks OK.

> >     2.  Execute the command `make clean' (this might not work because
> >     the makefiles might not exist -- don't worry about it).
...
> 
> >     3.  Remove the file `config.cache'
...
> >     4.  Echo the the variable $cross_compiling.  If it's set to `yes',
> >     then that's the problem.  Unset the variable.
> 
> % echo $cross_compiling
> cross_compiling: Undefined variable.

I didn't think it was set.  So much for the longshot.
...
> >     5.  Edit the file `configure'.  Find the line that contains the string
> >     `checking whether cross-compiling'.  Insert the command `set -x' 
> >     before that line and the command `set +x' before the later line that
> >     contains the string `checking size of int'.
> 
> # If we cannot run a trivial program, we must be cross compiling.
> set -x
> echo $ac_n "checking whether cross-compiling""... $ac_c" 1>&6
> if eval "test \"`echo '$''{'ac_cv_c_cross'+set}'`\" = set"; then
> 
I assume the code gap at this point is because you didn't want to include
all the code.

> set +x
>     echo $ac_n "checking size of int""... $ac_c" 1>&6
> if eval "test \"`echo '$''{'ac_cv_sizeof_int'+set}'`\" = set"; then
> 
> >     6.  Execute the configure script.  Trap the output and send it to
> >     me.
> % configure
...
> + echo checking whether cross-compiling... \c
> + 1>& 6
> checking whether cross-compiling... + echo ${ac_cv_c_cross+set}
> + eval test "${ac_cv_c_cross+set}" = set
> + test  = set
> + test  = yes
> + cat
> + 1> conftest.c 0< /tmp/jtmp.011287a/sh79446.9
> + eval ${CC-cc} -o conftest $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext
> $LIBS 1>&5 2>&5
> + c89 -o conftest -O conftest.c
> + 1>& 5 2>& 5
> + test -s conftest
> + ac_cv_c_cross=yes
> + rm -fr conftest.c
> + cross_compiling=yes
> + echo yes
> + 1>& 6
> yes
> checking size of int... configure: error: can not run test program while
> cross compiling
> % 

It appears that the following command:

    c89 -o conftest -O conftest.c
    
which was executed by the configure script in the above, was unable to
create the file `conftest' and that's the reason the configure script
decided that you must be cross-compiling.  I infer this from the `test
-s conftest' above being immediately followed by the `ac_cv_c_cross=yes'
and from the fact that the `rm -fr conftest*' was expanded by the shell
to just `rm -fr conftest.c' (the executable wasn't listed).

If the above, simple compile doesn't work, then you haven't a prayer of
building the netCDF package.  We need to discover why the compile didn't
work.  I suggest the following:

    1.  Edit the configure script:
    
        a.  Comment-out the `rm -fr conftest*' command in the section
            of code we've been dealing with.

        b.  Change the `set -x' to `exit'.
        
        These changes will allow the `conftest.c' file to exist after the
        script has terminated.

    2.  Remove config.cache and *.log

    3.  Execute the configure script.

    4.  Look at the file `config.log'.  The last lines in it might
        indicate why the compile failed.

    5.  Try manually compiling the `conftest.c' file:

            c89 -o conftest -O conftest.c

        Trap the output and send it to me (it should be the same as the
        last lines in the `config.log' file.

    6.  Try using other C compilers to manually compile the `conftest.c'
        file.  If no C compiler will compile the file, they try simple
        chages to the file.

    7.  If another C compiler will compile the `conftest.c' file,
        then try the configure script with that compiler:

        a.  Back out of all changes to the configure script.

        b.  Remove the files config.cache and *.log

        c.  Set the environment variable CC to the new compiler, e.g.

            % setenv CC "gcc -ansi"     # just an example

        d.  Execute the configure script.  Trap the output in case
            something goes wrong.

> > I think there's something in your environment that's causing the
> > configure script to think that you're cross-compiling.  
> 
> Here's what my environment looks like (all the modules stuff is new to
> me and I don't understand it - it's needed by the latest version of
> cf90):

I meant `environment' in the broadest sense, not just your environment
variables (they look OK to me, however).

--------
Steve Emmerson   <address@hidden>