[ncl-install] troubl compiling NCAR graphics on new Mac OSX machine

[Mary Haley]

Hi Ron,

Rather than linking in libxxxx.a files specifically, it's better to
use "-L/path/to/library -lxxxx" on the compile line, and let your
system figure out whether to use the *.a file or the *.dylib file,
if there's one.

For example, instead of:

LIBS =  /usr/local/ncarg/lib/libncarg.a /usr/local/ncarg/lib/libncarg_gks.a \
         /usr/local/ncarg/lib/libncarg_c.a       /usr/X11R6/lib/libXpm.a /usr/X11R6/lib/libX11.a \
         /usr/X11R6/lib/libXext.a        /usr/lib/gcc/darwin/2.95.2/libcc_dynamic.a \
        /usr/lib/libSystemStubs.a       /sw/lib/libg2c.a

You can use something like:

LIBPATHS = -L/usr/local/ncarg/lib -L/usr/X11R6/lib -L/sw/lib \
            -L/usr/lib/gcc/darwin/2.95.2

LIBS =  $(LIBPATHS) -lncarg -lncarg_gks -lncarg_c -lXpm -lX11 -lXext \
         -cc_dynamic  -lSystemStubs   -lg2c

However, I think your library list needs to change slightly.  For
example, the PNG and Z libraries are now needed to compile NCAR
Graphics.  These are usually available on your system, or you can
install them with fink.

Since "ncargex cpex08" worked for you, I recommend watching the output
when you run it, and you will see what libraries and paths are needed.

For example, if it looks something like this:

   gfortran -O -o cpex08 cpexcc.f cpex08.f -L/usr/local/ncarg/lib -L/sw/lib
     -L/usr/X11R6/lib -lncarg -lncarg_gks -lncarg_c -lXpm -lX11 -lXext
     -lpng -lz

Then you could change your Makefile to something like:

LIBPATHS = -L/usr/local/ncarg/lib -L/usr/X11R6/lib -L/sw/lib

LIBS =  $(LIBPATHS) -lncarg -lncarg_gks -lncarg_c -lXpm -lX11 -lXext \
         -lpng -lz

Let me know if you need help getting the png and/or zlib libraries.

--Mary



On Tue, 17 Mar 2009, Ronald L. Gilliland wrote:

> Hello,
>
>   I installed the new 5.1 version of NCL yesterday on
> my new Intel-based MacBook Pro running 10.5.6.
>   Everything went pretty smoothly getting to the point
> of being able to run the example 'ng4ex xy01n -clean'
> producing an on screen plot, and 'ncargex cpex08'
> producing a metafile which I could display with idt,
> convert with ctrans, etc.
>
>   The only way in which I want to use NCL is for Fortran
> callable graphics, which I've most recently for 5 yrs
> done on a PowerPC-based Mac running 10.3, then 10.4.
>
>   My problem is knowing how to set up a make file properly
> that links in all the needed binaries.  An example of
> what has worked for 5 yrs on PowerPC, linking with IBM xlf
> compiled fortran is:
>
> ----------------------------
> SHELL=/bin/sh
> #
> CFT= xlf
> FFLAGS= -O2 -qextname
> .DEFAULT:	.f
> .SUFFIXES:	.f
> .f.o:	$*.f
> 	$(CFT) -c $(FFLAGS) $*.f
>
> OBJS=	plser.o
>
> #
> LDFLAGS=
> LIBS=   /usr/local/ncarg/lib/libncarg.a /usr/local/ncarg/lib/
> libncarg_gks.a \
>         /usr/local/ncarg/lib/libncarg_c.a       /usr/X11R6/lib/
> libXpm.a /usr/X11R6/lib/libX11.a \
>         /usr/X11R6/lib/libXext.a        /usr/lib/gcc/darwin/2.95.2/
> libcc_dynamic.a \
>         /usr/lib/libSystemStubs.a       /sw/lib/libg2c.a
>
> COMMAND=plser.out
>
> $(COMMAND):	$(OBJS)
> 	$(CFT) $(LDFLAGS) -o $(COMMAND) $(OBJS) $(LIBS)
>
> clean:
> 	rm $(OBJS) $(COMMAND)
> ------------------------------
>
>   I'm now, at least temporarily, attempting to replicate similar using
> gfortran on my Intel-based 10.5 machine.
>   BUT, I'm at a loss for all of the libraries that need to be linked
> in.
>   I've found the libnarg.a, libncarg_gks.a and libncarg_c.a
> under my /usr/local/lib and linked these in.  The basic NCAR graphics
> calls are recognized.  But, I only see 'libX11.a' etc files in a
> Developer directory with a 10.4 path, if I drill down in the one with
> a 10.5 path I see only similar files ending in 'dylib' instead of 'a'.
>
>   Without great confidence I'm doing the right thing I've linked
> in the corresponding 'dylib' libraries.  This led to a large number
> of previously unreferenced "X" items not being complained about.
>
>   But there are still issues.  Using the following makefile:
>
> -----------------------
> SHELL=/bin/sh
> #
> CFT= gfortran
> #FFLAGS= -O2 -qextname
> FFLAGS=
> .DEFAULT:	.f
> .SUFFIXES:	.f
> .f.o:	$*.f
> 	$(CFT) -c $(FFLAGS) $*.f
>
> OBJS=	pltest2.o
>
> #
> LDFLAGS=
> LIBS=	/usr/local/lib/libncarg.a	/usr/local/lib/libncarg_c.a \
> 	/usr/local/lib/libncarg_gks.a		/sw/lib/libg2c.a \
> 	/Developer/SDKs/MacOSX10.5.sdk/usr/lib/libSystemStubs.a \
> 	/Developer/SDKs/MacOSX10.5.sdk/usr/X11/lib/libXpm.4.dylib \
> 	/Developer/SDKs/MacOSX10.5.sdk/usr/X11/lib/libX11.6.dylib \
> 	/Developer/SDKs/MacOSX10.5.sdk/usr/X11/lib/libXext.6.dylib
>
> COMMAND=pltest2.out
>
> $(COMMAND):	$(OBJS)
> 	$(CFT) $(LDFLAGS) -o $(COMMAND) $(OBJS) $(LIBS)
>
> clean:
> 	rm $(OBJS) $(COMMAND)
> --------------------------
>
> Results in problems:
> About 60 lines of the type:
> ld: warning for symbol _vctseq_ tentative definition of size 512 from /
> usr/local/lib/libncarg.a(plotif.o) is is smaller than the real
> definition of size 508 from /usr/local/lib/libncarg.a(utilbd.o)
>
> And: some still Undefined symbols:
>   "_png_malloc", referenced from:
>       _write_png in libncarg_gks.a(pixwrite_png.o)
>   "_png_write_png", referenced from:
>       _write_png in libncarg_gks.a(pixwrite_png.o)
>
> (a total of 8 of these all looking like above).
> ld: symbol(s) not found
> collect2: ld returned 1 exit status
> make: *** [pltest2.out] Error 1
>
>   Would anyone have a makefile for compiling codes with Fortran
> on an Intel system that shows successful specification of libraries
> that are needed?  Or fairly explicit advice of what to try next,
> I've read through the install and NCL FAQs pretty extensively.
>
>   And, ultimately, if this matters I'm intending to switch to Intel
> Fortran shortly.
>
> Thanks,
> Ron Gilliland
>
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