# Generic Makefile for compiling a program that uses MPI
#
# Do NOT copy and paste this file, but rather save it, as make(1) depends on
# tabs -- copy and paste would turn those into normal whitespace.
#
# Example code is in the file "integral.c".

# Replace "trapezoid" with the name of the executable to create
TARGET=		trapezoid

# Number of Processors to run this program on
NP=		30

# List the object-files needed;  usually, these are the names of the
# source-files with the ending substituted with ".o"
OFILES=		integral.o

# Libraries to link with.
# In addition to the MPI library, this examples needs libm.so for the use of
# the sin(3) function.
LDFLAGS=	-lmpich -lm

# Common prefixes on our machines.
PREFIX= 	/usr/pkg
X11PREFIX=	/usr/X11R6

# Common flags passed to the compiler while compiling
CFLAGS=		-Wall

# Where to find the header files.
INCLUDES=	-I${PREFIX}/include -I${X11PREFIX}/include

# Where to find the libraries
LIBDIRS=	-L${PREFIX}/lib -L${X11PREFIX}/include

# the famous 'all' target, invoked if you type 'make' or 'make all'
all: ${TARGET}

# TARGET depends on the object files, created through the
# .c.o: rule.  It then calls the compiler to link the object-files into the
# executable.  Note that library parameters are position sensitive.
${TARGET}: ${OFILES}
	${CC} ${LIBDIRS} ${OFILES} -o ${TARGET} ${LDFLAGS}

# automatically compile each .c-file or .cpp-file into a .o-object file
.cpp.o .c.o:
	${CC} ${INCLUDES} ${CFLAGS} -c $< -o $@

# run the executable on the specified number of machines using mpirun(1)
# Note: if you just invoke the executable, it will only run on the local
# machine!  You need to use mpirun(1).
run:
	${PREFIX}/bin/mpirun -np ${NP} ./${TARGET}

# rm object files and executable before compiling everything from scratch
clean:
	rm -f ${TARGET} ${OFILES}