toolchain/share/doc/gdb/Fortran-Defaults.html

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<h5 class="subsubsection">15.4.6.2 Fortran Defaults</h5>
<p><a name="index-Fortran-Defaults-1037"></a>
Fortran symbols are usually case-insensitive, so <span class="sc">gdb</span> by
default uses case-insensitive matches for Fortran symbols. You can
change that with the &lsquo;<samp><span class="samp">set case-insensitive</span></samp>&rsquo; command, see
<a href="Symbols.html#Symbols">Symbols</a>, for the details.
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