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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Looking at the source code, a check is first made for __clang__ and sets CMAKE_<LANG>_COMPILER_ID to “Clang”. If you are using CMake 2.8.12, you can even get
“AppleClang” to further differentiate it. Since you are using clang, this is correct. This is the variable you should be looking at. Since so many flavors of compilers are based on or compatible with gcc, the test for __GNUC__ comes after testing for all of
the others. CMAKE_COMPILER_IS_GNUCC is only set for this last case.<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"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> cmake-bounces@cmake.org [mailto:cmake-bounces@cmake.org]
<b>On Behalf Of </b>vv zhao<br>
<b>Sent:</b> Wednesday, October 16, 2013 2:46 AM<br>
<b>To:</b> cmake@cmake.org<br>
<b>Subject:</b> [CMake] 2.8.11: CMAKE_COMPILER_IS_GNUCC AND CMAKE_COMPILER_IS_GNUCXX Value Changed<o:p></o:p></span></p>
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<p><span style="font-size:10.5pt;font-family:"Arial","sans-serif"">Hi Guys, <o:p></o:p></span></p>
<p><span style="font-size:10.5pt;font-family:"Arial","sans-serif"">I'm v.v., a developer using cmake to generate our project, <o:p></o:p></span></p>
<p><span style="font-size:10.5pt;font-family:"Arial","sans-serif"">Recently we updated our cmake from 2.8.8 to 2.8.11 on Mac, immediately I found a difference between the latest and previous version, <o:p></o:p></span></p>
<p><span style="font-size:10.5pt;font-family:"Arial","sans-serif"">I see CMAKE_COMPILER_IS_GNUCC AND CMAKE_COMPILER_IS_GNUCXX is changed from true to false, but I didn't change my compiler at all, I am using XCode4.5 and select com.apple.compilers.llvm.clang.1_0
as CMAKE_XCODE_ATTRIBUTE_GCC_VERSION in toolchain file, <o:p></o:p></span></p>
<p><span style="font-size:10.5pt;font-family:"Arial","sans-serif"">So my question here is: Is this a correct behaviour for latest 2.8.11 that CMAKE_COMPILER_IS_GNUCC AND CMAKE_COMPILER_IS_GNUCXX is false?<o:p></o:p></span></p>
<p><span style="font-size:10.5pt;font-family:"Arial","sans-serif"">BTW, I read all of documents from 2.8.8 to 2.8.11 about this variable, but seems no explicit description about this change, <o:p></o:p></span></p>
<p><span style="font-size:10.5pt;font-family:"Arial","sans-serif"">Do you have any ideas?<o:p></o:p></span></p>
<p><span style="font-size:10.5pt;font-family:"Arial","sans-serif"">Thanks in advance!<o:p></o:p></span></p>
<p><span style="font-size:10.5pt;font-family:"Arial","sans-serif"">V.V.<o:p></o:p></span></p>
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