Try putting the -lnetcdf /after/ the source file / object file (ditto
for LDFLAGS, FWIW).
-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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