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<section id="fflags">
<span id="envvar:FFLAGS"></span><h1>FFLAGS<a class="headerlink" href="#fflags" title="Permalink to this heading">ΒΆ</a></h1>
<p>This is a CMake <a class="reference internal" href="../manual/cmake-language.7.html#cmake-language-environment-variables"><span class="std std-ref">Environment Variable</span></a>. Its initial value is taken from
the calling process environment.</p>
<p>Add default compilation flags to be used when compiling <code class="docutils literal notranslate"><span class="pre">Fortran</span></code> files.</p>
<p>CMake uses this environment variable value, in combination with its own
builtin default flags for the toolchain, to initialize and store the
<span class="target" id="index-1-variable:CMAKE_<LANG>_FLAGS"></span><a class="reference internal" href="../variable/CMAKE_LANG_FLAGS.html#variable:CMAKE_<LANG>_FLAGS" title="CMAKE_<LANG>_FLAGS"><code class="xref cmake cmake-variable docutils literal notranslate"><span class="pre">CMAKE_Fortran_FLAGS</span></code></a> cache entry.
This occurs the first time a build tree is configured for language <code class="docutils literal notranslate"><span class="pre">Fortran</span></code>.
For any configuration run (including the first), the environment variable
will be ignored if the <span class="target" id="index-2-variable:CMAKE_<LANG>_FLAGS"></span><a class="reference internal" href="../variable/CMAKE_LANG_FLAGS.html#variable:CMAKE_<LANG>_FLAGS" title="CMAKE_<LANG>_FLAGS"><code class="xref cmake cmake-variable docutils literal notranslate"><span class="pre">CMAKE_Fortran_FLAGS</span></code></a> variable is already defined.</p>
<p>See also <span class="target" id="index-0-variable:CMAKE_<LANG>_FLAGS_INIT"></span><a class="reference internal" href="../variable/CMAKE_LANG_FLAGS_INIT.html#variable:CMAKE_<LANG>_FLAGS_INIT" title="CMAKE_<LANG>_FLAGS_INIT"><code class="xref cmake cmake-variable docutils literal notranslate"><span class="pre">CMAKE_Fortran_FLAGS_INIT</span></code></a>.</p>
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