[petsc-users] Compiling PETSc on Windows with Cygwin: errors with `win32fe cl`; okay to use `gcc`, `g++`, `gfortran` as compilers instead of `win32cf cl`?

[Brian Merchant]

> [however you can't build petsc with cygwin/gnu compilers - and then
link in with an application using MS compilers]

Could you tell me a little more about what you mean here? (sorry, I am a
newbie) Is it that if I make an application say in Visual Studio, and
attempt to use that application to call PETSc functions compiled with
Cygwin, then I will run into trouble?

I contacted this group: http://www2.msic.ch/Software
and got the latest build from them that is supposed to work with Visual
Studio; which addresses your MS compilers concern?

However, I also want to use petsc4py Python bindings with PETSc, so I
shouldn't be in trouble there if I use Cygwin, right?

Kind regards,
Brian

On Sat, Nov 21, 2015 at 12:55 PM, Satish Balay <balay at mcs.anl.gov> wrote:

> Hm - If you can work with cygwin/gnu compilers - then you can build
> petsc with them - and use it.
>
> [however you can't build petsc with cygwin/gnu compilers - and then
> link in with an application using MS compilers]
>
> Satish
>
> On Sat, 21 Nov 2015, Brian Merchant wrote:
>
> > Hi all,
> >
> > I'd like to try and install PETSc on Windows (even though I have been
> > forewarned that it is better to simply install it on a unix system).
> >
> > Some information about my system:
> > * Windows 10 Pro, 64 bit
> > * latest Cygwin with make, gcc, g++, gfortran installed
> >
> > The PETSc installation instructions suggest that I run the following
> > command:
> >
> >     ./configure --with-cc="win32fe cl"  --with-fc="win32fe ifort"
> > --with-cxx="win32fe\ cl" --download-fblaslapack\
> >
> > However, that results in the following error:
> >
> >     C compiler you provided with -with-cc=win32fe cl does not work.
> >     Cannot compile C with /cygdrive/a/petsc/bin/win32fe/win32fe cl.
> >
> >
> > The answer to this stackexchange question:
> >
> http://stackoverflow.com/questions/30229620/petsc-build-error-c-compiler-does-not-work
> >
> > recommends the following command instead (with escaped whitespace):
> >
> >     ./configure --with-cc="win32fe\ cl"  --with-fc="win32fe\ ifort"
> > --with-cxx="win32fe\ cl" --download-fblaslapack
> >
> > Running that command results in the following error (note no second line
> in
> > error):
> >
> >     C compiler you provided with -with-cc=win32fe\ cl does not work.
> >
> > In both cases, the configure.log output only contains (I do not use
> Chinese
> > characters, these were in the file):
> >
> > > 㰡祳汭湩㹫arch-mswin-c-debug/lib/petsc/conf/configure.log
> >
> > What should I do? Also, do `gcc`/`g++` compiled programs not work on
> > Windows? I ask because if I simply run the suggested command in the
> "Quick
> > Installation" guide, using `gcc` and `g++`; then I don't get compilation
> > errors. Would it be okay to simply use those compilers then?
> >
> > Kind regards,
> > Brian
> >
>
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