I'm not sure how to silence this (demangled) warning from the nightlies:

"/export/home/petsc/petsc.clone-3/src/ksp/ksp/impls/fcg/pipefcg/pipefcg.c", 
line 112: warning: statement not reached

There are a few other warnings of the same form in the log linked below, on the 
first source line
after something like

#ifdef PETSC_USE_COMPLEX
..
#endif

or in the case of the particular warning here, the first source line (after 
some other preprocessor directives) after

#if (defined(PETSC_USE_COMPLEX) && !defined(PETSC_SKIP_COMPLEX))
  SETERRQ(PETSC_COMM_WORLD,PETSC_ERR_SUP,"PIPEFGMRES has not been implemented 
for use with complex scalars");
#endif




----- Forwarded message from PETSc checkBuilds <[email protected]> 
-----

From: PETSc checkBuilds <[email protected]>
To: Patrick Sanan <[email protected]>, PETSc checkBuilds 
<[email protected]>
Date: Wed,  2 Mar 2016 09:00:08 -0600 (CST)
Subject: PETSc blame digest (next) 2016-03-02



Dear PETSc developer,

This email contains listings of contributions attributed to you by
`git blame` that caused compiler errors or warnings in PETSc automated
testing.  Follow the links to see the full log files. Please attempt to fix
the issues promptly or let us know at [email protected] if you are unable
to resolve the issues.

Thanks,
  The PETSc development team

----

warnings attributed to commit https://bitbucket.org/petsc/petsc/commits/390d8e4
KSP: Add KSPPIPEFCG

  src/ksp/ksp/impls/fcg/pipefcg/pipefcg.c:112
    
[http://ftp.mcs.anl.gov/pub/petsc/nightlylogs/archive/2016/03/02/build_next_arch-opensolaris-cmplx-pkgs-dbg_n-gage.log]
      
"/export/home/petsc/petsc.clone-3/src/ksp/ksp/impls/fcg/pipefcg/pipefcg.c", 
line 112: warning:           CC 
arch-opensolaris-cmplx-pkgs-dbg/obj/src/ksp/ksp/impls/symmlq/symmlq.o

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