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<p class="MsoNormal"><span style="color:#1F497D">Update. The reason I didn’t have CMAKE_CXX_COMPILER in my cache is because I was doing a<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"> set(CMAKE_CXX_COMPILER /usr/bin/g++44 )<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">at the top of my root CMakeLists.txt. That preempts the set( CACHE ) call that project() does. My bad.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Frank <o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext"> cmake-bounces@cmake.org [mailto:cmake-bounces@cmake.org]
<b>On Behalf Of </b>Miller, Frank<br>
<b>Sent:</b> Thursday, May 02, 2013 9:51 AM<br>
<b>To:</b> m.hergarden@euphoria-it.nl<br>
<b>Cc:</b> cmake@cmake.org<br>
<b>Subject:</b> Re: [CMake] How to determine the compiler used outside of cmake<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="color:#1F497D">Interesting. I am running a very recent version (2.8.10.20130415) built from git. Perhaps the handling of CMAKE_CXX_COMPILER has changed recently.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">I can’t believe I didn’t think to manually put it in the cache. That will work for me. Thanks.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">As for the bigger problem I am solving... I have a wrapper script that drives the build. This is done to emulate a legacy build system and add some nice-to-haves. For example, the user can call the script from
their source tree and it will call cmake/ninja in the proper binary tree. The default compiler to be used is hard coded into the CMakeLists.txt and I would like to have the script detect when the compiler changes and do a reconfigure automatically.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Now that I’m explaining the larger problem, I think I will have to put extra information in the cache to detect when the user manually overrides the default compiler. So I probably would have come around to your
suggestion on my own.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Thanks again,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Frank<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext"> m.hergarden [<a href="mailto:m.hergarden@euphoria-it.nl">mailto:m.hergarden@euphoria-it.nl</a>]
<br>
<b>Sent:</b> Thursday, May 02, 2013 12:16 AM<br>
<b>To:</b> Miller, Frank<br>
<b>Cc:</b> <a href="mailto:cmake@cmake.org">cmake@cmake.org</a><br>
<b>Subject:</b> Re: [CMake] How to determine the compiler used outside of cmake<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">The compiler does show up in my cache: CMAKE_CXX_COMPILER:FILEPATH=/usr/bin/c++, but that doesn't solve your issue.<br>
What is the bigger problem you are solving? If you really really need it in the cache, you can always write a variable yourself to make sure it's there.<br>
<br>
Regards,<br>
Micha<br>
<br>
On 05/01/2013 09:56 PM, Miller, Frank wrote:<o:p></o:p></p>
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<p class="MsoNormal">Greetings,<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">Given a configured build tree, I would like to determine the c++ compiler used without reconfiguring. I expected the CMAKE_CXX_COMPILER variable would be in the CMakeCache.txt but I was wrong. I tried to run a simple cmake script with ‘cmake
-P’ and print the value of CMAKE_CXX_COMPILER but that does not work. I found the value in ‘CMakeFiles/2.8.10.20130415/CMakeCXXCompiler.cmake’, so I have a workaround, but that smells like the wrong solution. Does anyone know of a better way?<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">Thanks as always,<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">Frank<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><span style="font-size:12.0pt;font-family:"Times New Roman","serif""><br>
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<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><span style="font-size:12.0pt;font-family:"Times New Roman","serif""><o:p> </o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><span style="font-size:12.0pt;font-family:"Times New Roman","serif"">--
<o:p></o:p></span></p>
<p class="MsoNormal">Met vriendelijke groet,<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Micha Hergarden<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><img border="0" width="200" height="84" id="_x0000_i1025" src="cid:image001.png@01CE4741.44A62AB0" alt="image001">
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