Patch futils/mpiuni for GCC

The bundled futils_src/Makefile.ifort file works fine, but the futils_src/Makefile.gfortran needs some work.

I propose to change the Makefile.gfortran to reflect the Makefile.ifort file, but with compilers and flags changed from intel to gfortran. A diff is attached below (from !9 (merged)):

diff --git a/src-f90/futils_src/Makefile.gfortran b/src-f90/futils_src/Makefile.gfortran
index 63b4909..ae5f928 100644
--- a/src-f90/futils_src/Makefile.gfortran
+++ b/src-f90/futils_src/Makefile.gfortran
@@ -1,18 +1,20 @@
 PREFIX=$(HOME)/gcc

-F90 = mpif90
+F90 = gfortran
 OPT = -g -fbounds-check -fbacktrace  # only from 4.3.x
 OPT = -g -fbounds-check
-F90FLAGS = $(OPT) -I${HDF5}/lib -I${HDF5}/include
+F90FLAGS = $(OPT) $(INCL_HDF5)
 CC = cc
-CFLAGS = -O2
-LDFLAGS = $(OPT) -L. -L${HDF5}/lib
+CFLAGS = -O2 -Impiuni
+LDFLAGS = $(OPT) -L. $(LIBS_HDF5)

-LIBS =  -lfutils -lhdf5_fortran -lhdf5 -lz
+LIBS =  -lfutils -lhdf5_fortran -lhdf5 -lz -lmpiuni

 .SUFFIXES:
 .SUFFIXES: .o .c .f90

+.PHONY: mpiuni
+
 .f90.o:
        $(F90) $(F90FLAGS) -c $<

@@ -21,47 +23,28 @@ lib: libfutils.a getfile
 getfile: getfile.o
        $(F90) $(LDFLAGS) -o $@ $<  $(LIBS)

-libfutils.a: futils.o cutils.o buffer.o vis3d.o
+libfutils.a: futils.o cutils.o buffer.o uniproc.o
        ar r $@ $?
        ranlib $@

-futils.o: append.tpl zappend.tpl \
-          putarr.tpl cputarr.tpl putarrnd.tpl cputarrnd.tpl \
-          getarr.tpl cgetarr.tpl getarrnd.tpl cgetarrnd.tpl
-
-buffer.o: futils.o
-
-vis3d.o: futils.o
-
-test:
-       make -C ../examples test_s test_p
-
-install: debug opt
-
-debug:
-       make distclean
-       make "OPT = -g -fbounds-check" libfutils.a
-       mkdir -p $(PREFIX)/{lib,include}/g
-       cp -p libfutils.a $(PREFIX)/lib/g
-       cp -p *.mod $(PREFIX)/include/g
+mpiuni:
+       $(MAKE) -C mpiuni lib FC="$(F90)" FFLAGS="$(OPT)" CC=$(CC)

-opt:
-       make distclean
-       make "OPT = -O2" libfutils.a
-       mkdir -p $(PREFIX)/{lib,include}/O
-       cp -p libfutils.a $(PREFIX)/lib/O
-       cp -p *.mod $(PREFIX)/include/O
+futils.o: mpiuni \
+          append.tpl zappend.tpl \
+          putarr.tpl cputarr.tpl \
+          getarr.tpl cgetarr.tpl
+       $(F90) $(F90FLAGS) -Impiuni -c futils.f90

-uninstall:
-       rm -f $(PREFIX)/include{O,g}/futils.mod
-       rm -f $(PREFIX)/include{O,g}/hashtable.mod
-       rm -f $(PREFIX)/include{O,g}/vis3d.mod
-       rm -f $(PREFIX)/lib{O,g}/libfutils.a
+buffer.o: mpiuni futils.o
+       $(F90) $(F90FLAGS) -Impiuni -c buffer.f90

 getfile.o:     libfutils.a

 clean:
-       rm -f *.o *~ a.out fort.* *.h5*
+       rm -f *.o *~ a.out
+       make -C mpiuni clean

 distclean: clean
-       rm -f getfile *.a *.mod TAGS
+       rm -f $(SERIAL) ex6 getfile *.h5 *.a *.mod
+       make -C mpiuni distclean

Before accepting such a change, we should check if this file is taken as-is from upstream futils, and if yes, we should patch upstream and then re-update futils from upstream.