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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 -fbackslash -fcray-pointer -fd-lines-as-code |
| -fd-lines-as-comments -fdefault-double-8 -fdefault-integer-8 |
| -fdefault-real-8 -fdollar-ok -ffixed-line-length-<var>n</var> |
| -ffixed-line-length-none -ffree-form -ffree-line-length-<var>n</var> |
| -ffree-line-length-none -fimplicit-none -finteger-4-integer-8 |
| -fmax-identifier-length -fmodule-private -fno-fixed-form -fno-range-check |
| -fopenmp -freal-4-real-10 -freal-4-real-16 -freal-4-real-8 |
| -freal-8-real-10 -freal-8-real-16 -freal-8-real-4 -std=<var>std</var> |
| |
| </pre> |
| <br><dt><em>Preprocessing Options</em><dd>See <a href="Preprocessing-Options.html#Preprocessing-Options">Enable and customize preprocessing</a>. |
| <pre class="smallexample"> -A-<var>question</var><span class="roman">[</span>=<var>answer</var><span class="roman">]</span> |
| -A<var>question</var>=<var>answer</var> -C -CC -D<var>macro</var><span class="roman">[</span>=<var>defn</var><span class="roman">]</span> |
| -H -P |
| -U<var>macro</var> -cpp -dD -dI -dM -dN -dU -fworking-directory |
| -imultilib <var>dir</var> |
| -iprefix <var>file</var> -iquote -isysroot <var>dir</var> -isystem <var>dir</var> -nocpp |
| -nostdinc |
| -undef |
| |
| </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"> -Waliasing -Wall -Wampersand -Warray-bounds |
| -Wc-binding-type -Wcharacter-truncation |
| -Wconversion -Wfunction-elimination -Wimplicit-interface |
| -Wimplicit-procedure -Wintrinsic-shadow -Wintrinsics-std |
| -Wline-truncation -Wno-align-commons -Wno-tabs -Wreal-q-constant |
| -Wsurprising -Wunderflow -Wunused-parameter -Wrealloc-lhs Wrealloc-lhs-all |
| -Wtarget-lifetime -fmax-errors=<var>n</var> -fsyntax-only -pedantic -pedantic-errors |
| |
| </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"> -fbacktrace -fdump-fortran-optimized -fdump-fortran-original |
| -fdump-parse-tree -ffpe-trap=<var>list</var> |
| |
| </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> -fmax-subrecord-length=<var>length</var> |
| -frecord-marker=<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"> -faggressive-function-elimination -fblas-matmul-limit=<var>n</var> |
| -fbounds-check -fcheck-array-temporaries |
| -fcheck=<var><all|array-temps|bounds|do|mem|pointer|recursion></var> |
| -fcoarray=<var><none|single|lib></var> -fexternal-blas -ff2c |
| -ffrontend-optimize |
| -finit-character=<var>n</var> -finit-integer=<var>n</var> -finit-local-zero |
| -finit-logical=<var><true|false></var> |
| -finit-real=<var><zero|inf|-inf|nan|snan></var> |
| -fmax-array-constructor=<var>n</var> -fmax-stack-var-size=<var>n</var> |
| -fno-align-commons |
| -fno-automatic -fno-protect-parens -fno-underscoring -fno-whole-file |
| -fsecond-underscore -fpack-derived -frealloc-lhs -frecursive |
| -frepack-arrays -fshort-enums -fstack-arrays |
| |
| </pre> |
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