Hello,
It seems a few folks are running in to similar problems; hopefully I can
cover them sufficiently here to save others some grief.
> I try to compile the ncarg with HDF using the gcc/g77 compiler.
> (RH9 on a Dell inspiron 5150 notebook)
Red Hat Linux v9 is a supported platform, so that's good. It does matter
what version of the GNU development tools (gcc, g77, etc.) you're using.
You can check by running:
% gcc -v
or
% g77 -v
The results from each should match; the GNU compilers are both built from
the same code base. As an example:
% gcc -v
Reading specs from /usr/lib/gcc-lib/i386-redhat-linux/3.2.2/specs
Configured with: ../configure --prefix=/usr --mandir=/usr/share/man
--infodir=/usr/share/info --enable-shared --enable-threads=posix
--disable-checking --with-system-zlib --enable-__cxa_atexit
--host=i386-redhat-linux
Thread model: posix
gcc version 3.2.2 20030222 (Red Hat Linux 3.2.2-5)
> In my config/LINUX file I have the options -lg2c and -lm
> and I encounter a lot of "undefined reference to main"
> errors (ex on fontc and graphc files). After reading a few
> suggestions in the list I decide to comment out the above
> two options.
Indeed, the file $NCARG/config/LINUX file does include the line
#define CtoFLibraries -lg2c -lm
This gets propagated to Makefiles in all subdirectories. This system-wide
definition/propagation was necessary at one point in the past, for the GNU
development tools of version 2.9x vintage, to build the NCARG source code.
In particular, the "-lg2c" verbiage was necessary for the subdirectories
where both C and Fortran object files were linked together.
The newer GNU development tools, those found with Red Hat Linux v9, do not
need the link with the library libg2c.a when compiling Fortran-only source
code (as is the case in the source directories noted below). The
linker/loader will locate the proper object code to build an executable.
The interim solution (until the code base here is updated) is to edit the
Makefiles in these directories:
$NCARG/common/src/fontcap
$NCARG/common/src/graphcap
$NCARG/ncarg2d/src/bin/pre2ncgm
$NCARG/ncarg2d/src/db/pwritxnt
Change the line:
CTOFLIBS = -lg2c -lm
to
CTOFLIBS =
and run 'make' again, in those directories.
Regarding the HDF software:
> Errors reduces to a few (it cant find the hdf.h and says no such file) .
It's important to note that NCARG expects to find the HDF include files
in a directory path like: .../include/hdf as noted in the INSTALL file
for NCARG. If this isn't the case, you'll see errors like "can't find
file hdf.h"
If installing HDF v4.2r0, you can configure such as:
% ./configure --prefix=/local --includedir=/local/include/hdf
In this example, I've installed the HDFv4 software relative to /local,
and the header files in particular in /local/include/hdf I have also
specified /local/include as a place to look for locally installed
header files when running the Configure program for NCARG. Then, when
NCARG source code files specify something like
#include <hdf/hdf.h>
those files will be found, because NCARG was configured to look in the
directory /local/include/hdf and /local/include/hdf/hdf.h exists,
per my installation of the HDFv4 software.
> A single error for gcc on ictrans (undefinedreference to "s_copy', to
> "sqrt", to "cos", to "sin" !) !
Did you modify the Makefile for ictrans?
</path/to/ncarg/ncarview/src/lib/libictrans/Makefile>
The proper library ("-lm" or /usr/lib/libm.a) is present in the correct
spot in the Makefile, if you configured correctly. The "-lm" in this case
is from
#define CtoFLibraries -lg2c -lm
in the $NCARG/config/LINUX file.
-Rick.
-- Rick Grubin Visualization + Enabling Technologies Scientific Computing Division National Center for Atmospheric Research grubin AT unknown 303.497.1832_______________________________________________ ncarg-talk mailing list ncarg-talk AT unknown http://mailman.ucar.edu/mailman/listinfo/ncarg-talk
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