On Sat, 6 Sep 2014, Barry Smith wrote: > > The first configure fails with ccache, removing it does not fail
>>>>>> stderr: clang: warning: argument unused during compilation: '-I /var/folders/c1/ldz_dt8n2r3dtwv_chp5pfr40000gq/T/petsc-a0322M/config.setCompilers' <<<<<<< https://code.google.com/p/chromium/wiki/CCacheMac says use: CC="ccache clang -Qunused-arguments" CXX="ccache clang++ -Qunused-arguments" Satish
