Re: [netcdfgroup] netcdf-4.3.3.1 link problem with openmpi on Ubuntu (using mpicc)

• To: netcdfgroup@xxxxxxxxxxxxxxxx
• Subject: Re: [netcdfgroup] netcdf-4.3.3.1 link problem with openmpi on Ubuntu (using mpicc)
• From: tom fogal <tfogal@xxxxxxxxxxxx>
• Date: Sun, 16 Aug 2015 18:14:33 -0700

-tom

On 08/16/2015 05:28 PM, John Helly wrote:

Hi.
I'm trying to compile one of the ucar mpi example files for a class and
am having some elementary difficulty pointing to the netcdf libraries. I
haven't used the openmpi compiler (wrapper) before so I'm flailing a
bit. Any pointers would be most welcome.

hellyj@mae2:/data2/mpi-geospatial/src/c/ucar-examples$ make
mpicc -O1 -w  -I/usr/local/netcdf/include -L/usr/local/netcdf/lib
-lnetcdf  simple_xy_wr.c -o simple_xy_wr
/tmp/cc0uYG2N.o: In function `main':
simple_xy_wr.c:(.text+0x44): undefined reference to `nc_create'
simple_xy_wr.c:(.text+0x4f): undefined reference to `nc_strerror'
simple_xy_wr.c:(.text+0x87): undefined reference to `nc_def_dim'
simple_xy_wr.c:(.text+0x92): undefined reference to `nc_strerror'
simple_xy_wr.c:(.text+0xca): undefined reference to `nc_def_dim'
simple_xy_wr.c:(.text+0xd5): undefined reference to `nc_strerror'
simple_xy_wr.c:(.text+0x127): undefined reference to `nc_def_var'
simple_xy_wr.c:(.text+0x132): undefined reference to `nc_strerror'
simple_xy_wr.c:(.text+0x15b): undefined reference to `nc_enddef'
simple_xy_wr.c:(.text+0x166): undefined reference to `nc_strerror'
simple_xy_wr.c:(.text+0x198): undefined reference to `nc_put_var_int'
simple_xy_wr.c:(.text+0x1a3): undefined reference to `nc_strerror'
simple_xy_wr.c:(.text+0x1cc): undefined reference to `nc_close'
simple_xy_wr.c:(.text+0x1d7): undefined reference to `nc_strerror'
collect2: error: ld returned 1 exit status
make: *** [simple_xy_wr] Error 1

Here's the makefile:

##############################################################################

# FILE:
Makefile.MPI.c

#
DESCRIPTION:

#   Makefile for all MPI C Language example
codes

# AUTHOR: J.
Helly

# LAST REVISED:
08/16/15

###############################################################################

LD_LIBRARY_PATH="/usr/local/netcdf/lib:$LD_LIBRARY_PATH"
export LD_LIBRARY_PATH
#

#Uncomment your choice of
compiler

CC         = mpicc
CFLAGS     = -I/usr/local/netcdf/include
LIB_NETCDF = -L/usr/local/netcdf/lib
LDFLAGS    = ${LIB_NETCDF}

#Add your choice of
flags

FLAGS   =   -O1 -w

all:    simple_xy_wr
clean:
         /bin/rm -rf     \
         *.o

simple_xy_wr:  simple_xy_wr.c
         $(CC) $(FLAGS) ${CFLAGS} ${LDFLAGS} -lnetcdf  simple_xy_wr.c -o
simple_xy_wr


Thanks.
J.



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• References:
  • [netcdfgroup] NetCDF-C 4.4.0-rc2 now available
    • From: Ward Fisher
  • Re: [netcdfgroup] NetCDF-C 4.4.0-rc2 now available
    • From: Orion Poplawski
  • [netcdfgroup] netcdf-4.3.3.1 link problem with openmpi on Ubuntu (using mpicc)
    • From: John Helly