Hi there,
I wanna make two different static libraries from the same FORTRAN source files,
one with OMP support, one without. Thus %.o file generated during compilation
will differ and must be keept for updating both the libraries when one files
has changed (to avoid making MAKE recompiling everything). Since the naming of
the %.o files is the same they will be kept in two different directories.
With the following setting I have managed to get full recompilation and
rebuilding after "make clean", and, if one source file has changed,
recompilation of that file and library update:
#makefile
SRC :=
FORTRAN = ifort
OPTS = -O3 -mkl=sequential -warn nounused -warn declarations
DRVOPTS = $(OPTS)
LOADER = ifort
ARCH = ar
ARCHFLAGS= cr
RANLIB = ranlib
kernel=$(shell uname -r)
LibName=Lib_Tools_$(FORTRAN)_$(kernel)_1.0.a
.SUFFIXES:
.SUFFIXES: .f90
include src/Moduls_MKL.mk
vpath %.o NoOMP/
vpath %.f90 src/
OBJS = $(subst .f90,.o,$(SRC))
%.o: %.f90
$(FORTRAN) $(OPTS) -c $< -o $(addprefix NoOMP/,$@)
$(LibName): $(OBJS)
$(ARCH) $(ARCHFLAGS) $@ $(addprefix NoOMP/,$?)
$(RANLIB) $@
clean:
-rm *.smod
-rm *.mod
-rm NoOMP/*.o
-rm $(LibName)
However, if I remove the library from the folder, MAKE tries to rebuilt the
target. Since none of the %.o files need to be rebuilt, their filename is
expanded by "NoOMP/". Thus "$(addprefix NoOMP/,$?)" will result in an
additional expansion and AR will complain that it could not find files named
"NoOMP/NoOMP/*.o". The same holds when removing the library and in addition
changing one source file.
The only remedy I could figure out is to execute "make clean; make". Then
filename prefixes introduced by vpath will be dropped and expansion via "$
(addprefix)" will yield the correct results. Or I change to "$(ARCH) $
(ARCHFLAGS) $@ $?", which will cause subsequent trouble for re-compiled files.
Thus, the final goal is, in addition to the already correct behaviour, to get
MAKE rebuilding the library from scratch using old %.o files only in "NoOMP/",
or using old %.o files and new %.o files in "NoOMP/".
Is there any way to achive that without an additional makefile.
Thanks a lot
Karl
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