[netcdfgroup] Fortran compiler settings - ifort

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• Subject: [netcdfgroup] Fortran compiler settings - ifort
• From: Bart Brashers <bbrashers@xxxxxxxxxxx>
• Date: Tue, 20 Nov 2018 03:00:35 +0000
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Hi all,

I have a code compiled with ifort, the intel Fortran compiler. The flags it 
uses look like this, though -traceback is probably temporary for debugging:

FCFLAGS = -c -names lowercase -O2 -fp-model strict -fpic -assume byterecl 
-mixed-str-len-arg -align sequence -traceback

I've compiled zlib-1.2.8, hdf5-1.8.11, and netcdf-4.1.2* using these FCLAGS 
(FFLAGS).

When I run my compiled code I get a Segmentation Fault immediately as the code 
calls nf_create(). That's not a particularly complicated subroutine, so I'm 
puzzled.

If instead I use extremely minimal flags for zlib, hdf5, and netcdf:

FFLAGS = -g

and these flags for the main code:

FCFLAGS = -c -g -traceback -check bounds -align dcommons -extend_source 
-static_intel

Then I can compile and run the code, and create a netCDF file using 
nf_create(), and add attributes, variables, etc. But the main code behaves 
erratically and crashes for other reasons that seem mostly related to indexing 
of arrays.

Can someone suggest either a "standard" set of FCFLAGS I should be using for 
zlib, hdf5, and netcdf; or a sub-set of the flags above for the main code that 
might work with netCDF? The main hint is the immediate SegFault after calling 
nf_create(). CFLAGS in both cases is simple, just "-g". Extra hint: using 
pgfortran for everything works just fine.

Platform: CentOS 7.4
ifort is the latest (2019) using a trial license.

* I'm very aware that I should be using a newer version of the netcdf libs, but 
this version is being used by the code authors. I suspect they like the unified 
C and Fortran compilation.

Bart

• Follow-Ups:
  • Re: [netcdfgroup] Fortran compiler settings - ifort
    • From: Elizabeth A. Fischer
  • Re: [netcdfgroup] [EXTERNAL] Fortran compiler settings - ifort
    • From: Larry Baker