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| <div class="section" id="cmakepushcheckstate"> |
| <span id="module:CMakePushCheckState"></span><h1>CMakePushCheckState<a class="headerlink" href="#cmakepushcheckstate" title="Permalink to this headline">ΒΆ</a></h1> |
| <p>This module defines three macros: CMAKE_PUSH_CHECK_STATE() |
| CMAKE_POP_CHECK_STATE() and CMAKE_RESET_CHECK_STATE() These macros can |
| be used to save, restore and reset (i.e., clear contents) the state of |
| the variables CMAKE_REQUIRED_FLAGS, CMAKE_REQUIRED_DEFINITIONS, |
| CMAKE_REQUIRED_LIBRARIES, CMAKE_REQUIRED_INCLUDES and CMAKE_EXTRA_INCLUDE_FILES |
| used by the various Check-files coming with CMake, like e.g. |
| check_function_exists() etc. The variable contents are pushed on a |
| stack, pushing multiple times is supported. This is useful e.g. when |
| executing such tests in a Find-module, where they have to be set, but |
| after the Find-module has been executed they should have the same |
| value as they had before.</p> |
| <p>CMAKE_PUSH_CHECK_STATE() macro receives optional argument RESET. |
| Whether it’s specified, CMAKE_PUSH_CHECK_STATE() will set all |
| CMAKE_REQUIRED_* variables to empty values, same as |
| CMAKE_RESET_CHECK_STATE() call will do.</p> |
| <p>Usage:</p> |
| <div class="highlight-default"><div class="highlight"><pre><span></span><span class="n">cmake_push_check_state</span><span class="p">(</span><span class="n">RESET</span><span class="p">)</span> |
| <span class="nb">set</span><span class="p">(</span><span class="n">CMAKE_REQUIRED_DEFINITIONS</span> <span class="o">-</span><span class="n">DSOME_MORE_DEF</span><span class="p">)</span> |
| <span class="n">check_function_exists</span><span class="p">(</span><span class="o">...</span><span class="p">)</span> |
| <span class="n">cmake_reset_check_state</span><span class="p">()</span> |
| <span class="nb">set</span><span class="p">(</span><span class="n">CMAKE_REQUIRED_DEFINITIONS</span> <span class="o">-</span><span class="n">DANOTHER_DEF</span><span class="p">)</span> |
| <span class="n">check_function_exists</span><span class="p">(</span><span class="o">...</span><span class="p">)</span> |
| <span class="n">cmake_pop_check_state</span><span class="p">()</span> |
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