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Re: [newbie] "linker input file unused because linking not done"?

From: Tim Prince <n8tm at aol dot com>
To: fortran at gcc dot gnu dot org
Date: Fri, 25 Nov 2011 17:02:56 -0500
Subject: Re: [newbie] "linker input file unused because linking not done"?
References: <87ehwv50ja.fsf@pobox.com>
Reply-to: tprince at computer dot org

On 11/25/2011 4:56 PM, Tom Roche wrote:

I have a Makefile with

FC     = gfortran
FFLAGS = -ffixed-line-length-132 -w -c -m64 -march=native -funroll-loops --param max-unroll-times=4 -ftree-vectorize -ftree-vectorizer-verbose=0 -O2 -I$(NETCDF)/include -I$(IOAPI_ROOT)/src -I.
LIBS   = -L$(IOAPI_ROOT)/lib -lioapi \
          -L$(NETCDF)/lib -lnetcdff -lnetcdf

gfortran: warning:<object filename here/>: linker input file unused because linking not done

Yes, the -c in FFLAGS tells gfortran not to pass a command to ld. It's usual to leave -c out of FFLAGS and add it explicitly to the rules for making .o and .mod files etc.


--
Tim Prince

References:
- [newbie] "linker input file unused because linking not done"?
  - From: Tom Roche

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