sorry for the trivial question
i am new to open mpi and parallel computing

i installed openmpi-1.6.1 on my pc which has an ubuntu 12.10
also i have nas parallel benchmark , i need to edit the NPB make file "make.def"
i need to know what is the linker library file for both fortran and c compilers and where i can find them in the build folder ( i think i should find them in lib folder )
it is
F_LIB   and   C_LIB that are required
this is the NPB make file:


#---------------------------------------------------------------------------
#
#                SITE- AND/OR PLATFORM-SPECIFIC DEFINITIONS.
#
#---------------------------------------------------------------------------

#---------------------------------------------------------------------------
# Items in this file will need to be changed for each platform.
#---------------------------------------------------------------------------

#---------------------------------------------------------------------------
# Parallel Fortran:
#
# For CG, EP, FT, MG, LU, SP, BT and UA, which are in Fortran, the following
# must be defined:
#
# F77        - Fortran compiler
# FFLAGS     - Fortran compilation arguments
# F_INC      - any -I arguments required for compiling Fortran
# FLINK      - Fortran linker
# FLINKFLAGS - Fortran linker arguments
# F_LIB      - any -L and -l arguments required for linking Fortran
#
# compilations are done with $(F77) $(F_INC) $(FFLAGS) or
#                            $(F77) $(FFLAGS)
# linking is done with       $(FLINK) $(F_LIB) $(FLINKFLAGS)
#---------------------------------------------------------------------------

#---------------------------------------------------------------------------
# This is the fortran compiler used for Fortran programs
#---------------------------------------------------------------------------
F77 = f77
# This links fortran programs; usually the same as ${F77}
FLINK    = $(F77)

#---------------------------------------------------------------------------
# These macros are passed to the linker
#---------------------------------------------------------------------------
F_LIB  =

#---------------------------------------------------------------------------
# These macros are passed to the compiler
#---------------------------------------------------------------------------
F_INC =

#---------------------------------------------------------------------------
# Global *compile time* flags for Fortran programs
#---------------------------------------------------------------------------
FFLAGS    = -O

#---------------------------------------------------------------------------
# Global *link time* flags. Flags for increasing maximum executable
# size usually go here.
#---------------------------------------------------------------------------
FLINKFLAGS = -O


#---------------------------------------------------------------------------
# Parallel C:
#
# For IS and DC, which are in C, the following must be defined:
#
# CC         - C compiler
# CFLAGS     - C compilation arguments
# C_INC      - any -I arguments required for compiling C
# CLINK      - C linker
# CLINKFLAGS - C linker flags
# C_LIB      - any -L and -l arguments required for linking C
#
# compilations are done with $(CC) $(C_INC) $(CFLAGS) or
#                            $(CC) $(CFLAGS)
# linking is done with       $(CLINK) $(C_LIB) $(CLINKFLAGS)
#---------------------------------------------------------------------------

#---------------------------------------------------------------------------
# This is the C compiler used for C programs
#---------------------------------------------------------------------------
CC = cc
# This links C programs; usually the same as ${CC}
CLINK    = $(CC)

#---------------------------------------------------------------------------
# These macros are passed to the linker
#---------------------------------------------------------------------------
C_LIB  = -lm

#---------------------------------------------------------------------------
# These macros are passed to the compiler
#---------------------------------------------------------------------------
C_INC =

#---------------------------------------------------------------------------
# Global *compile time* flags for C programs
# DC inspects the following flags (preceded by "-D"):
#
# IN_CORE - computes all views and checksums in main memory (if there is
# enough memory)
#
# VIEW_FILE_OUTPUT - forces DC to write the generated views to disk
#
# OPTIMIZATION - turns on some nonstandard DC optimizations
#
# _FILE_OFFSET_BITS=64
# _LARGEFILE64_SOURCE - are standard compiler flags which allow to work with
# files larger than 2GB.
#---------------------------------------------------------------------------
CFLAGS    = -O

#---------------------------------------------------------------------------
# Global *link time* flags. Flags for increasing maximum executable
# size usually go here.
#---------------------------------------------------------------------------
CLINKFLAGS = -O


#---------------------------------------------------------------------------
# Utilities C:
#
# This is the C compiler used to compile C utilities.  Flags required by
# this compiler go here also; typically there are few flags required; hence
# there are no separate macros provided for such flags.
#---------------------------------------------------------------------------
UCC    = cc


#---------------------------------------------------------------------------
# Destination of executables, relative to subdirs of the main directory. .
#---------------------------------------------------------------------------
BINDIR    = ../bin


#---------------------------------------------------------------------------
# The variable RAND controls which random number generator
# is used. It is described in detail in README.install.
# Use "randi8" unless there is a reason to use another one.
# Other allowed values are "randi8_safe", "randdp" and "randdpvec"
#---------------------------------------------------------------------------
RAND   = randi8
# The following is highly reliable but may be slow:
# RAND   = randdp


#---------------------------------------------------------------------------
# The variable WTIME is the name of the wtime source code module in the
# common directory. 
# For most machines,       use wtime.c
# For SGI power challenge: use wtime_sgi64.c
#---------------------------------------------------------------------------
WTIME  = wtime.c


#---------------------------------------------------------------------------
# Enable if either Cray (not Cray-X1) or IBM:
# (no such flag for most machines: see common/wtime.h)
# This is used by the C compiler to pass the machine name to common/wtime.h,
# where the C/Fortran binding interface format is determined
#---------------------------------------------------------------------------
# MACHINE    =    -DCRAY
# MACHINE    =    -DIBM