[petsc-users] Cannot find a C preprocessor OSX

Sat Mar 19 12:15:13 CDT 2016

On Sat, 19 Mar 2016, Denis Davydov wrote:

> 
> > On 19 Mar 2016, at 17:38, Matthew Knepley <knepley at gmail.com> wrote:
> > 
> > On Sat, Mar 19, 2016 at 11:29 AM, Satish Balay <balay at mcs.anl.gov <mailto: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?
> 
> AFAIK CFLAGS are not use in PETSc config system to check working C preprocessor and settings 
> CFLAGS=-Qunused-arguments
> still leads to Cannot find a C preprocessor .
> which is the original issue.
> 

oh well. you could use --with-cc='mpicc -Qunused-arguments'

Satish

> Regards,
> Denis.
> > 
> >    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 <mailto: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
> 
> 