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Next: <a rel="next" accesskey="n" href="Fortran-Dialect-Options.html#Fortran-Dialect-Options">Fortran Dialect Options</a>,
Up: <a rel="up" accesskey="u" href="Invoking-GNU-Fortran.html#Invoking-GNU-Fortran">Invoking GNU Fortran</a>
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<h3 class="section">2.1 Option summary</h3>
<!-- man begin OPTIONS -->
<p>Here is a summary of all the options specific to GNU Fortran, grouped
by type. Explanations are in the following sections.
<dl>
<dt><em>Fortran Language Options</em><dd>See <a href="Fortran-Dialect-Options.html#Fortran-Dialect-Options">Options controlling Fortran dialect</a>.
<pre class="smallexample"> -fall-intrinsics -ffree-form -fno-fixed-form
-fdollar-ok -fimplicit-none -fmax-identifier-length
-std=<var>std</var> -fd-lines-as-code -fd-lines-as-comments
-ffixed-line-length-<var>n</var> -ffixed-line-length-none
-ffree-line-length-<var>n</var> -ffree-line-length-none
-fdefault-double-8 -fdefault-integer-8 -fdefault-real-8
-fcray-pointer -fopenmp -fno-range-check -fbackslash -fmodule-private
</pre>
<br><dt><em>Preprocessing Options</em><dd>See <a href="Preprocessing-Options.html#Preprocessing-Options">Enable and customize preprocessing</a>.
<pre class="smallexample"> -cpp -dD -dI -dM -dN -dU -fworking-directory
-imultilib <var>dir</var> -iprefix <var>file</var> -isysroot <var>dir</var>
-iquote -isystem <var>dir</var> -nocpp -nostdinc -undef
-A<var>question</var>=<var>answer</var> -A-<var>question</var><span class="roman">[</span>=<var>answer</var><span class="roman">]</span>
-C -CC -D<var>macro</var><span class="roman">[</span>=<var>defn</var><span class="roman">]</span> -U<var>macro</var> -H -P
</pre>
<br><dt><em>Error and Warning Options</em><dd>See <a href="Error-and-Warning-Options.html#Error-and-Warning-Options">Options to request or suppress errors and warnings</a>.
<pre class="smallexample"> -fmax-errors=<var>n</var>
-fsyntax-only -pedantic -pedantic-errors
-Wall -Waliasing -Wampersand -Warray-bounds -Wcharacter-truncation
-Wconversion -Wimplicit-interface -Wimplicit-procedure -Wline-truncation
-Wintrinsics-std -Wsurprising -Wno-tabs -Wunderflow -Wunused-parameter
-Wintrinsic-shadow -Wno-align-commons
</pre>
<br><dt><em>Debugging Options</em><dd>See <a href="Debugging-Options.html#Debugging-Options">Options for debugging your program or GNU Fortran</a>.
<pre class="smallexample"> -fdump-fortran-original -fdump-fortran-optimized
-ffpe-trap=<var>list</var> -fdump-core -fbacktrace -fdump-parse-tree
</pre>
<br><dt><em>Directory Options</em><dd>See <a href="Directory-Options.html#Directory-Options">Options for directory search</a>.
<pre class="smallexample"> -I<var>dir</var> -J<var>dir</var> -fintrinsic-modules-path <var>dir</var>
</pre>
<br><dt><em>Link Options</em><dd>See <a href="Link-Options.html#Link-Options">Options for influencing the linking step</a>.
<pre class="smallexample"> -static-libgfortran
</pre>
<br><dt><em>Runtime Options</em><dd>See <a href="Runtime-Options.html#Runtime-Options">Options for influencing runtime behavior</a>.
<pre class="smallexample"> -fconvert=<var>conversion</var> -fno-range-check
-frecord-marker=<var>length</var> -fmax-subrecord-length=<var>length</var>
-fsign-zero
</pre>
<br><dt><em>Code Generation Options</em><dd>See <a href="Code-Gen-Options.html#Code-Gen-Options">Options for code generation conventions</a>.
<pre class="smallexample"> -fno-automatic -ff2c -fno-underscoring
-fwhole-file -fsecond-underscore
-fbounds-check -fcheck-array-temporaries -fmax-array-constructor =<var>n</var>
-fcheck=<var><all|array-temps|bounds|do|mem|pointer|recursion></var>
-fcoarray=<var><none|single></var> -fmax-stack-var-size=<var>n</var>
-fpack-derived -frepack-arrays -fshort-enums -fexternal-blas
-fblas-matmul-limit=<var>n</var> -frecursive -finit-local-zero
-finit-integer=<var>n</var> -finit-real=<var><zero|inf|-inf|nan|snan></var>
-finit-logical=<var><true|false></var> -finit-character=<var>n</var>
-fno-align-commons -fno-protect-parens -frealloc-lhs
</pre>
</dl>
<ul class="menu">
<li><a accesskey="1" href="Fortran-Dialect-Options.html#Fortran-Dialect-Options">Fortran Dialect Options</a>: Controlling the variant of Fortran language
compiled.
<li><a accesskey="2" href="Preprocessing-Options.html#Preprocessing-Options">Preprocessing Options</a>: Enable and customize preprocessing.
<li><a accesskey="3" href="Error-and-Warning-Options.html#Error-and-Warning-Options">Error and Warning Options</a>: How picky should the compiler be?
<li><a accesskey="4" href="Debugging-Options.html#Debugging-Options">Debugging Options</a>: Symbol tables, measurements, and debugging dumps.
<li><a accesskey="5" href="Directory-Options.html#Directory-Options">Directory Options</a>: Where to find module files
<li><a accesskey="6" href="Link-Options.html#Link-Options">Link Options </a>: Influencing the linking step
<li><a accesskey="7" href="Runtime-Options.html#Runtime-Options">Runtime Options</a>: Influencing runtime behavior
<li><a accesskey="8" href="Code-Gen-Options.html#Code-Gen-Options">Code Gen Options</a>: Specifying conventions for function calls, data layout
and register usage.
</ul>
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