# Requirements: GNU make, GNU C, and an F90 compiler
# Platforms:    IBM, SGI, Cray, DEC, Sun (both SunSoft and CraySoft F90)

# To build executable:
#
#    gmake trac_bench
#
# If on Solaris using CraySoft F90:
#
#    gmake cray=y trac_bench

# Figure out what operating system is being used.
uname = $(shell uname -a)
os = $(firstword $(uname))
ifeq (sn,$(findstring sn,$(os)))
  os = UNICOS
  CPPFLAGS = -Dunicos
endif
ifeq (IRIX, $(findstring IRIX,$(os)))
  os = IRIX
endif

# Define cray macro for cpp if appropriate.
ifdef cray
  CPPFLAGS += -Dcray
endif

# Command name and flags for F90.
ifeq ($(os),AIX)
  FC = f90
  FFLAGS = -O3 -qextname
endif

ifeq ($(os),IRIX)
  FC = f90
  FFLAGS = -O3
endif

ifeq ($(os),OSF1)
  FC = f90
  FFLAGS = -fast -O5 -tune host
endif

ifeq ($(os),SunOS)

  ifdef cray
    FC = f90
    FFLAGS = -a dalign -O scalar3
  else
    FC = f90
    FFLAGS = -fast
  endif

endif

ifeq ($(os),UNICOS)
  FC = f90
  FFLAGS = -O vector3
endif

# How to preprocess.
%.f90: %.F90
	cp $< $(basename $<).c
	gcc -traditional -E $(CPPFLAGS) $(basename $<).c | grep -v "^$$" | grep -v "^#" > $@
	rm -f $(basename $<).c

# How to build executable.
trac_bench: trac_bench.f90
	$(FC) -o $@ $(FFLAGS) $<

dist:
	tar cvf trac_bench.tar trac_bench.F90 GNUmakefile

# Cleanup.
clean:
	rm -f *~ *.f90 *.M *.mod trac_bench