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Makefiles

Makefiles

• make command allows the programmer to maintain, update, and regenerate groups of computer programs

• aimk - portable make wrapper script - architecture independent

• used to portably select options to build PVM and PVM applications on various machines

• each port of PVM is assigned an architecture name - the name is used both during compilation (to conditionally switch in code) and at runtime (to select an executable or host)

• aimk determines the machine architecture and execs make, passing it the architecture and a configuration file

• aimk runs make in a subdirectory to prevent executables from becoming intermixed and to permit overlapping compiles ie different makefile can be placed in each subdirectory or a single makefile, Makefile.aimk, can be shared between architectures

• aimk uses the value of environment variable $PVM_ARCH if it is set, otherwise it calls $PVM_ROOT/pvmgetarch to determine the architecture name
  • $PVM_ROOT - Root path of PVM installation.

  • $PVM_ARCH - PVM architecture name for machine.

EXAMPLE Makefile.aimk

SDIR = ..

BDIR = $(HOME)/pvm3/bin

XDIR = $(BDIR)/$(PVM_ARCH)

F77 = f77

FFLAGS = -g

FLIBS = $(PVM_ROOT)/lib/$(PVM_ARCH)/libfpvm3.a

default: fmaster fslave

$(XDIR):

- mkdir $(BDIR)

- mkdir $(XDIR)

clean:

rm -f *.o fmaster fslave testall

fmaster: $(SDIR)/master1.f $(XDIR)

$(F77) $(FFLAGS) -o master1 $(SDIR)/master1.f $(FLIBS) $(LIBS)

mv master1 $(XDIR)

fslave: $(SDIR)/slave1.f $(XDIR)

$(F77) $(FFLAGS) -o slave1 $(SDIR)/slave1.f $(FLIBS) $(LIBS)

mv slave1 $(XDIR)

testall: $(SDIR)/testall.f $(XDIR)

$(F77) $(FFLAGS) -o testall $(SDIR)/testall.f $(FLIBS) $(LIBS)

mv testall $(XDIR)

Practical

• Modify supplied Makefile.aimk and recompile and test previous practicals