[petsc-users] Cannot find a C preprocessor OSX

Matthew Knepley knepley at gmail.com
Sat Mar 19 11:38:32 CDT 2016 

On Sat, Mar 19, 2016 at 11:29 AM, Satish Balay <balay at mcs.anl.gov> wrote:

> This code is a bit convoluted..
>
> There is CPP, CPPFLAGS, CXXCPP, CXXCPPFLAGS. But then no FPP or FPPFLAGS..
>

Is this really true? Is the Fortran preprocessors not the C preprocessor? I
have never encountered this.
If you want flags which are different for C, use CFLAGS. Am I missing
something?

   Matt


> And then base.py has: [which is wrong for 'Cxx', 'FC'?]
>
>   def getPreprocessorFlagsName(self, language):
>     if language in ['C', 'Cxx', 'FC']:
>       flagsArg = 'CPPFLAGS'
>     elif language == 'CUDA':
>       flagsArg = 'CUDAPPFLAGS'
>     else:
>       raise RuntimeError('Unknown language: '+language)
>     return flagsArg
>
> And config/compile/FC.py has [which reuses CPP,CPPFLAGS for FC]:
>
> class Preprocessor(config.compile.C.Preprocessor):
>   '''The Fortran preprocessor, which now is just the C preprocessor'''
>   def __init__(self, argDB):
>     config.compile.C.Preprocessor.__init__(self, argDB)
>
> Matt - should we have FPP,FPPFLAGS supported here?
>
> Perhaps using CPPFLAGS with FC is a bug? So we should atleast do:
>
> diff --git a/config/BuildSystem/config/compile/FC.py
> b/config/BuildSystem/config/compile/FC.py
> index 3d0bf74..7bae24d 100644
> --- a/config/BuildSystem/config/compile/FC.py
> +++ b/config/BuildSystem/config/compile/FC.py
> @@ -13,6 +13,7 @@ class Preprocessor(config.compile.C.Preprocessor):
>      config.compile.C.Preprocessor.__init__(self, argDB)
>      self.language        = 'FC'
>      self.targetExtension = '.F'
> +    self.flagsName       = ''
>      self.includeDirectories = sets.Set()
>      return
>
> And then [I'm not sure where this gets used..]
>
> $ git diff config/BuildSystem/config/base.py |cat
> diff --git a/config/BuildSystem/config/base.py
> b/config/BuildSystem/config/base.py
> index b18a173..8b1129d 100644
> --- a/config/BuildSystem/config/base.py
> +++ b/config/BuildSystem/config/base.py
> @@ -454,8 +454,12 @@ class Configure(script.Script):
>
>    # Should be static
>    def getPreprocessorFlagsName(self, language):
> -    if language in ['C', 'Cxx', 'FC']:
> +    if language == 'C':
>        flagsArg = 'CPPFLAGS'
> +    elif language == 'Cxx':
> +      flagsArg = 'CXXCPPFLAGS'
> +    elif language == 'FC':
> +      flagsArg = ''
>      elif language == 'CUDA':
>        flagsArg = 'CUDAPPFLAGS'
>      else:
>
>
> Satish
>
> On Sat, 19 Mar 2016, Denis Davydov wrote:
>
> > Hi Satish,
> >
> > I think you have a bug in you config system as
> "CPPFLAGS=-Qunused-arguments" propagate to fortran compiler even when I try
> to explicitly specify "FPPFLAGS=" to nothing :
> >
> > TEST checkFortranCompiler from
> config.setCompilers(/private/var/folders/5k/sqpp24tx3ylds4fgm13pfht00000gn/T/davydden/spack-stage/spack-stage-jNBTET/petsc-3.6.3/config/BuildSystem/config/setCompilers.py:919)
> > TESTING: checkFortranCompiler from
> config.setCompilers(/private/var/folders/5k/sqpp24tx3ylds4fgm13pfht00000gn/T/davydden/spack-stage/spack-stage-jNBTET/petsc-3.6.3/config/BuildSystem/config/setCompilers.py:919)
> >   Locate a functional Fortran compiler
> > Checking for program
> /Users/davydden/spack/opt/spack/darwin-x86_64/clang-7.0.2-apple/openmpi-1.10.2-37xieeupgsteaq6btru6wmhxfi44xqtn/bin/mpif90...found
> >                 Defined make macro "FC" to
> "/Users/davydden/spack/opt/spack/darwin-x86_64/clang-7.0.2-apple/openmpi-1.10.2-37xieeupgsteaq6btru6wmhxfi44xqtn/bin/mpif90"
> >                 Pushing language FC
> > Executing:
> /Users/davydden/spack/opt/spack/darwin-x86_64/clang-7.0.2-apple/openmpi-1.10.2-37xieeupgsteaq6btru6wmhxfi44xqtn/bin/mpif90
> -c -o
> /var/folders/5k/sqpp24tx3ylds4fgm13pfht00000gn/T/petsc-zwyqnZ/config.setCompilers/conftest.o
> -I/var/folders/5k/sqpp24tx3ylds4fgm13pfht00000gn/T/petsc-zwyqnZ/config.setCompilers
> -Qunused-arguments
> /var/folders/5k/sqpp24tx3ylds4fgm13pfht00000gn/T/petsc-zwyqnZ/config.setCompilers/conftest.F
> > Possible ERROR while running compiler: exit code 256
> > stderr:
> > gfortran: error: unrecognized command line option '-Qunused-arguments’
> >
> > Kind regards,
> > Denis
> >
> > > On 18 Mar 2016, at 19:13, Satish Balay <balay at mcs.anl.gov> wrote:
> > >
> > > Or you can workarround by using additional PETSc configure option:
> > >
> > > CPPFLAGS=-Qunused-arguments
> > > [or CFLAGS?]
> > >
> > > Satish
> > >
> > >
> > > On Fri, 18 Mar 2016, Satish Balay wrote:
> > >
> > >> your mpicc is barfing stuff on stderr - thus confusing petsc
> configure.
> > >>
> > >> I don't see this issue with the old openmpi I have access to..
> > >>
> > >> What do you have for:
> > >>
> > >>
> /Users/davydden/spack/opt/spack/darwin-x86_64/clang-7.0.2-apple/openmpi-1.10.2-37xieeupgsteaq6btru6wmhxfi44xqtn/bin/mpicc
> -show
> > >> touch foo.c
> > >>
> /Users/davydden/spack/opt/spack/darwin-x86_64/clang-7.0.2-apple/openmpi-1.10.2-37xieeupgsteaq6btru6wmhxfi44xqtn/bin/mpicc
> -c foo.c -show
> > >>
> > >> I'm not sure what to suggest.. Perhaps you can use --download-mpich
> > >> [or --download-openmpi] - but then I see you are building all these
> > >> packages using spack - so perhaps you should check with 'spack' folk..
> > >>
> > >> Satish
> > >>
> > >> ---------
> > >>
> > >> Executing:
> /Users/davydden/spack/opt/spack/darwin-x86_64/clang-7.0.2-apple/openmpi-1.10.2-37xieeupgsteaq6btru6wmhxfi44xqtn/bin/mpicc
> -c -o
> /var/folders/5k/sqpp24tx3ylds4fgm13pfht00000gn/T/petsc-8RPaEA/config.setCompilers/conftest.o
> -I/var/folders/5k/sqpp24tx3ylds4fgm13pfht00000gn/T/petsc-8RPaEA/config.setCompilers
>  /var/folders/5k/sqpp24tx3ylds4fgm13pfht00000gn/T/petsc-8RPaEA/config.setCompilers/conftest.c
> > >> Possible ERROR while running compiler:
> > >> stderr:
> > >> clang: warning: argument unused during compilation:
> '-L/Users/davydden/spack/opt/spack/darwin-x86_64/clang-7.0.2-apple/boost-1.60.0-eo7nn3v27nxa7lxqv5tttjzikshwt56i/lib'
> > >> clang: warning: argument unused during compilation:
> '-L/Users/davydden/spack/opt/spack/darwin-x86_64/clang-7.0.2-apple/bzip2-1.0.6-leelnsg3humpngfeofkrdpgtsofrm5ya/lib'
> > >> clang: warning: argument unused during compilation:
> '-L/Users/davydden/spack/opt/spack/darwin-x86_64/clang-7.0.2-apple/openmpi-1.10.2-37xieeupgsteaq6btru6wmhxfi44xqtn/lib'
> > >> clang: warning: argument unused during compilation:
> '-L/Users/davydden/spack/opt/spack/darwin-x86_64/clang-7.0.2-apple/hwloc-1.11.2-pxsmp4nhfdjc3jb7odj5lhppu7wqna5b/lib'
> > >> clang: warning: argument unused during compilation:
> '-L/Users/davydden/spack/opt/spack/darwin-x86_64/clang-7.0.2-apple/libpciaccess-0.13.4-erc6tr3ghndi5ed3gbj6wtvw6zl4vobf/lib'
> > >> clang: warning: argument unused during compilation:
> '-L/Users/davydden/spack/opt/spack/darwin-x86_64/clang-7.0.2-apple/zlib-1.2.8-cyvcqvrzlgurne424y55hxvfucvz2354/lib'
> > >> clang: warning: argument unused during compilation:
> '-L/Users/davydden/spack/opt/spack/darwin-x86_64/clang-7.0.2-apple/hdf5-1.8.16-diujq2w7ew4qviquh67b3lkcqsxtf77y/lib'
> > >> clang: warning: argument unused during compilation:
> '-L/Users/davydden/spack/opt/spack/darwin-x86_64/clang-7.0.2-apple/hypre-2.10.1-4kql32qmjpp7ict2qczkyyv6a4mbrgbl/lib'
> > >> clang: warning: argument unused during compilation:
> '-L/Users/davydden/spack/opt/spack/darwin-x86_64/clang-7.0.2-apple/openblas-0.2.16-qplsxnxlbaqnz2iltdo7fdhlayvuaxel/lib'
> > >> clang: warning: argument unused during compilation:
> '-L/Users/davydden/spack/opt/spack/darwin-x86_64/clang-7.0.2-apple/metis-5.1.0-i5y5b6r5ca4f77u5tketagpkn6joxasp/lib'
> > >> clang: warning: argument unused during compilation:
> '-L/Users/davydden/spack/opt/spack/darwin-x86_64/clang-7.0.2-apple/ncurses-6.0-sabhdwxbdbbapfo6wodglfmyo6u3c3hj/lib'
> > >> clang: warning: argument unused during compilation:
> '-L/Users/davydden/spack/opt/spack/darwin-x86_64/clang-7.0.2-apple/openssl-1.0.2g-answvmhu3lodpmgulgzryygkkimmsn34/lib'
> > >> clang: warning: argument unused during compilation:
> '-L/Users/davydden/spack/opt/spack/darwin-x86_64/clang-7.0.2-apple/parmetis-4.0.3-auubrjcwhqmqnpoqjwgwgz4bcjnxzunx/lib'
> > >>
> > >> On Fri, 18 Mar 2016, Denis Davydov wrote:
> > >>
> > >>> Dear all,
> > >>>
> > >>> Although I saw this issue on the mailing list, that was related to
> broken compilers, i don’t think it’s the case here as `mpicc -E` seems to
> be ok.
> > >>> Log is attached.
> > >>>
> > >>> Kind regards,
> > >>> Denis
> > >>>
> > >>>
> > >>
> >
> >
>



-- 
What most experimenters take for granted before they begin their
experiments is infinitely more interesting than any results to which their
experiments lead.
-- Norbert Wiener
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