Thomas recently improved the offload experience by avoiding to use, e.g.
gfortran -O3 -fopenmp qcd.f90 -lblas -foffload-options="-lgfortran -lm" as libm and libgfortran now automatically get linked as 'gfortran' links -lgfortran and -lm on the host (only those libraries, not others). Thus, the commandline now looks much more natural: gfortran -O3 -fopenmp qcd.f90 -lblas → https.//gcc.gnu.org/r14-1807-g4bcb46b3ade179 for the code change. Attached patch documents it in the release notes. I loved to hear comments, suggestions, improvements (or even appraisals). If not, I just will commit it eventually as is - and it has to be improved later on ... Tobias ----------------- Siemens Electronic Design Automation GmbH; Anschrift: Arnulfstraße 201, 80634 München; Gesellschaft mit beschränkter Haftung; Geschäftsführer: Thomas Heurung, Frank Thürauf; Sitz der Gesellschaft: München; Registergericht München, HRB 106955
gcc-14/changes.htm - Offloading: -lm/-lgfortran is autolinked diff --git a/htdocs/gcc-14/changes.html b/htdocs/gcc-14/changes.html index c403c94f..96653f05 100644 --- a/htdocs/gcc-14/changes.html +++ b/htdocs/gcc-14/changes.html @@ -51,6 +51,15 @@ a work-in-progress.</p> was extended. </li> </ul> + </li> + <li>For offload-device code generated via OpenMP and OpenACC, the math + library and the Fortran runtime library will now automatically be linked, + when the user or compiler links them on the host side. Thus, it is no + longer required to explicitly pass <code>-lm</code> and/or + <code>-lgfortran</code> to the offload-device linker using the <a + href="https://gcc.gnu.org/onlinedocs/gcc/C-Dialect-Options.html#index-foffload-options" + ><code>-foffload-options=</code></a> flag. + </li> </ul> <!-- .................................................................. --> <h2 id="languages">New Languages and Language specific improvements</h2>