<div dir="ltr"><span id="docs-internal-guid-67b0b7eb-ba86-f8a3-1bd5-d2e0819c32fa"><p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:15px;font-family:Arial;color:rgb(0,0,0);background-color:transparent;vertical-align:baseline;white-space:pre-wrap">Hi,</span></p>
<br><span style="font-size:15px;font-family:Arial;color:rgb(0,0,0);background-color:transparent;vertical-align:baseline;white-space:pre-wrap"></span><p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:15px;font-family:Arial;color:rgb(0,0,0);background-color:transparent;vertical-align:baseline;white-space:pre-wrap">I’m trying to run a solver code I wrote in C++ on the Kraken supercomputer. Apparently Kraken already has a pre-built version of Petsc that is optimized for their Cray architecture. So I try compiling my code, and as expected, get an error message saying that “<iostream>” not found, which I’m guessing is because Petsc wasn’t configured with “-with-c-language=cxx”. Fair enough.</span></p>
<br><span style="font-size:15px;font-family:Arial;color:rgb(0,0,0);background-color:transparent;vertical-align:baseline;white-space:pre-wrap"></span><p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:15px;font-family:Arial;color:rgb(0,0,0);background-color:transparent;vertical-align:baseline;white-space:pre-wrap">However, at the end of the error message, it gives me the list of things it *was* configured with, and I see the flags “--with-cc=cc” and “--with-cxx=CC”. Does anyone know what that second flag means?</span></p>
<br><span style="font-size:15px;font-family:Arial;color:rgb(0,0,0);background-color:transparent;vertical-align:baseline;white-space:pre-wrap"></span><p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:15px;font-family:Arial;color:rgb(0,0,0);background-color:transparent;vertical-align:baseline;white-space:pre-wrap">best,</span></p>
<span style="font-size:15px;font-family:Arial;color:rgb(0,0,0);background-color:transparent;vertical-align:baseline;white-space:pre-wrap">David</span></span><br></div>