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
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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>
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<h2 id="languages">New Languages and Language specific improvements</h2>
