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<section id="cmakeforcecompiler">
<span id="module:CMakeForceCompiler"></span><h1>CMakeForceCompiler<a class="headerlink" href="#cmakeforcecompiler" title="Permalink to this heading"></a></h1>
<div class="deprecated">
<p><span class="versionmodified deprecated">Deprecated since version 3.6: </span>Do not use.</p>
</div>
<p>The macros provided by this module were once intended for use by
cross-compiling toolchain files when CMake was not able to automatically
detect the compiler identification. Since the introduction of this module,
CMake's compiler identification capabilities have improved and can now be
taught to recognize any compiler. Furthermore, the suite of information
CMake detects from a compiler is now too extensive to be provided by
toolchain files using these macros.</p>
<p>One common use case for this module was to skip CMake's checks for a
working compiler when using a cross-compiler that cannot link binaries
without special flags or custom linker scripts. This case is now supported
by setting the <span class="target" id="index-0-variable:CMAKE_TRY_COMPILE_TARGET_TYPE"></span><a class="reference internal" href="../variable/CMAKE_TRY_COMPILE_TARGET_TYPE.html#variable:CMAKE_TRY_COMPILE_TARGET_TYPE" title="CMAKE_TRY_COMPILE_TARGET_TYPE"><code class="xref cmake cmake-variable docutils literal notranslate"><span class="pre">CMAKE_TRY_COMPILE_TARGET_TYPE</span></code></a> variable in the
toolchain file instead.</p>
<hr class="docutils" />
<p>Macro <code class="docutils literal notranslate"><span class="pre">CMAKE_FORCE_C_COMPILER</span></code> has the following signature:</p>
<div class="highlight-none notranslate"><div class="highlight"><pre><span></span>CMAKE_FORCE_C_COMPILER(&lt;compiler&gt; &lt;compiler-id&gt;)
</pre></div>
</div>
<p>It sets <span class="target" id="index-0-variable:CMAKE_&lt;LANG&gt;_COMPILER"></span><a class="reference internal" href="../variable/CMAKE_LANG_COMPILER.html#variable:CMAKE_&lt;LANG&gt;_COMPILER" title="CMAKE_&lt;LANG&gt;_COMPILER"><code class="xref cmake cmake-variable docutils literal notranslate"><span class="pre">CMAKE_C_COMPILER</span></code></a> to
the given compiler and the cmake internal variable
<span class="target" id="index-0-variable:CMAKE_&lt;LANG&gt;_COMPILER_ID"></span><a class="reference internal" href="../variable/CMAKE_LANG_COMPILER_ID.html#variable:CMAKE_&lt;LANG&gt;_COMPILER_ID" title="CMAKE_&lt;LANG&gt;_COMPILER_ID"><code class="xref cmake cmake-variable docutils literal notranslate"><span class="pre">CMAKE_C_COMPILER_ID</span></code></a> to the given
compiler-id. It also bypasses the check for working compiler and basic
compiler information tests.</p>
<p>Macro <code class="docutils literal notranslate"><span class="pre">CMAKE_FORCE_CXX_COMPILER</span></code> has the following signature:</p>
<div class="highlight-none notranslate"><div class="highlight"><pre><span></span>CMAKE_FORCE_CXX_COMPILER(&lt;compiler&gt; &lt;compiler-id&gt;)
</pre></div>
</div>
<p>It sets <span class="target" id="index-1-variable:CMAKE_&lt;LANG&gt;_COMPILER"></span><a class="reference internal" href="../variable/CMAKE_LANG_COMPILER.html#variable:CMAKE_&lt;LANG&gt;_COMPILER" title="CMAKE_&lt;LANG&gt;_COMPILER"><code class="xref cmake cmake-variable docutils literal notranslate"><span class="pre">CMAKE_CXX_COMPILER</span></code></a> to
the given compiler and the cmake internal variable
<span class="target" id="index-1-variable:CMAKE_&lt;LANG&gt;_COMPILER_ID"></span><a class="reference internal" href="../variable/CMAKE_LANG_COMPILER_ID.html#variable:CMAKE_&lt;LANG&gt;_COMPILER_ID" title="CMAKE_&lt;LANG&gt;_COMPILER_ID"><code class="xref cmake cmake-variable docutils literal notranslate"><span class="pre">CMAKE_CXX_COMPILER_ID</span></code></a> to the given
compiler-id. It also bypasses the check for working compiler and basic
compiler information tests.</p>
<p>Macro <code class="docutils literal notranslate"><span class="pre">CMAKE_FORCE_Fortran_COMPILER</span></code> has the following signature:</p>
<div class="highlight-none notranslate"><div class="highlight"><pre><span></span>CMAKE_FORCE_Fortran_COMPILER(&lt;compiler&gt; &lt;compiler-id&gt;)
</pre></div>
</div>
<p>It sets <span class="target" id="index-2-variable:CMAKE_&lt;LANG&gt;_COMPILER"></span><a class="reference internal" href="../variable/CMAKE_LANG_COMPILER.html#variable:CMAKE_&lt;LANG&gt;_COMPILER" title="CMAKE_&lt;LANG&gt;_COMPILER"><code class="xref cmake cmake-variable docutils literal notranslate"><span class="pre">CMAKE_Fortran_COMPILER</span></code></a> to
the given compiler and the cmake internal variable
<span class="target" id="index-2-variable:CMAKE_&lt;LANG&gt;_COMPILER_ID"></span><a class="reference internal" href="../variable/CMAKE_LANG_COMPILER_ID.html#variable:CMAKE_&lt;LANG&gt;_COMPILER_ID" title="CMAKE_&lt;LANG&gt;_COMPILER_ID"><code class="xref cmake cmake-variable docutils literal notranslate"><span class="pre">CMAKE_Fortran_COMPILER_ID</span></code></a> to the given
compiler-id. It also bypasses the check for working compiler and basic
compiler information tests.</p>
<p>So a simple toolchain file could look like this:</p>
<div class="highlight-none notranslate"><div class="highlight"><pre><span></span>include (CMakeForceCompiler)
set(CMAKE_SYSTEM_NAME Generic)
CMAKE_FORCE_C_COMPILER (chc12 MetrowerksHicross)
CMAKE_FORCE_CXX_COMPILER (chc12 MetrowerksHicross)
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