<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><div class="">I used to compile my Fortran 90 code using intel compilers (i.e. intel and impi). However, when I tried to compile using gcc, it gave the following error.</div><div class=""><br class=""></div><div class=""><div style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: Menlo;" class=""><span style="font-variant-ligatures: no-common-ligatures" class=""> use petscksp</span></div><div style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: Menlo;" class=""><span style="font-variant-ligatures: no-common-ligatures" class=""> 1</span></div><div style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: Menlo;" class=""><span style="font-variant-ligatures: no-common-ligatures" class="">Fatal Error: File 'petscksp.mod' opened at (1) is not a GNU Fortran module file</span></div></div><div class=""><br class=""></div><div class="">It would be appreciated if you could give any hints on this issue. Thank you so much!</div><div class=""><br class=""></div><div class="">-Han</div></body></html>