The set_target_properties() of COMPILE_FLAGS allows you to add the -DDEBUG just for the mylibd target (although you should really use the COMPILE_DEFINITIONS property for preprocessor symbols). Why do you need to mess with the <FLAGS> part of the compile command ? Can't you add extra compiler command flags like this:<br>
<br> set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -myFlag")<br><br>or even replace the default flags entirely like this:<br><br> set(CMAKE_C_FLAGS "-foo")<br><br>I'm not sure what you are trying to achieve. Can you explain in a bit more detail ?<br>
<br>--<br>Glenn<br><br><div class="gmail_quote">On 8 September 2011 04:35, David Dunkle <span dir="ltr"><<a href="mailto:ddunkle@arxan.com">ddunkle@arxan.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
<div link="blue" vlink="purple" lang="EN-US"><div><p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D">Thanks, Glenn. That almost works. However, the values of <FLAGS> is hard to construct in this case. It looks something like this:<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D"><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D">add_library(mylib, STATIC, ${files})<u></u><u></u></span></p><p class="MsoNormal">
<span style="font-size:11.0pt;color:#1F497D">set_target_properties(mylib<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D"> PROPERTIES PREFIX “”<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D"> COMPILE_FLAGS ${target_compiler_flags})<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D">add_library(mylibd, STATIC, ${files})<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D">set_target_properties(mylibd,<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D"> PROPERTIES PREFIX “”<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D"> COMPILE_FLAGS “-DDEBUG ${target_compiler_flags}”)<u></u><u></u></span></p><div class="im"><p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D">…<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D">set(CMAKE_C_COMPILE_OBJECT "${target_compiler} -c <FLAGS> -o <OBJECT>")<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D"><u></u> <u></u></span></p>
</div><p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D">I can replace <FLAGS> with ${target_compiler_flags} yielding this:<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D">set(CMAKE_C_COMPILE_OBJECT “${target_compiler} –c ${target_compiler_flags} –o <OBJECT>”)<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D">but then the –DDEBUG is missing for the build of mylibd. I guess both mylibd and mylib use CMAKE_C_COMPILE_OBJECT and I need a way to pass the –DDEBUG to the compile of one and not the other.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D"><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D">-David<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D"><u></u> <u></u></span></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt">From:</span></b><span style="font-size:10.0pt"> Glenn Coombs [mailto:<a href="mailto:glenn.coombs@gmail.com" target="_blank">glenn.coombs@gmail.com</a>] <br><b>Sent:</b> Wednesday, September 07, 2011 4:19 AM<br>
<b>To:</b> David Cole<br><b>Cc:</b> David Dunkle; <a href="mailto:cmake@cmake.org" target="_blank">cmake@cmake.org</a><br><b>Subject:</b> Re: [CMake] novice question: modification of FLAGS rule variable?<u></u><u></u></span></p>
<div><div></div><div class="h5"><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal" style="margin-bottom:12.0pt">What you can do however is set the variable which uses the <FLAGS> definition, i.e. CMAKE_C_COMPILE_OBJECT in your example. I have a CMakeLists.txt file where I override the default assembler flags:<br>
<br>set(CMAKE_ASM-ATT_COMPILE_OBJECT "<CMAKE_ASM-ATT_COMPILER> ${ASM_SYS_FLAGS} -o <OBJECT> <SOURCE>")<br><br>to use what is set in my ASM_SYS_FLAGS variable instead of the default <FLAGS> one. I'm not sure but I think you are supposed to set these sort of variables early on in a CMakeList.txt before the project() or enable_language() commands. Also, I think that later changes to the ASM_SYS_FLAGS variable are ignored.<br>
<br>--<br>Glenn<u></u><u></u></p><div><p class="MsoNormal">On 5 September 2011 19:53, David Cole <<a href="mailto:david.cole@kitware.com" target="_blank">david.cole@kitware.com</a>> wrote:<u></u><u></u></p><div><div>
<p class="MsoNormal">On Mon, Sep 5, 2011 at 1:31 PM, David Dunkle <<a href="mailto:ddunkle@arxan.com" target="_blank">ddunkle@arxan.com</a>> wrote:<br>> Is it possible to read and to set a property/rule variable like <FLAGS>?<br>
> What syntax would I use to do that? I mean <FLAGS> as it, for example,<br>> appears here:<br>><br>><br>><br>> set(CMAKE_C_COMPILE_OBJECT "${target_compiler} -c <FLAGS> -o <OBJECT>")<br>
><br>><br>><br>> For example can I do something like this (this is pseudo code)?<br>><br>><br>><br>> #read<br>><br>> set(MY_FLAGS, ${<FLAGS>} );<br>><br>><br>><br>> …<br>><br>
><br>><br>> #set<br>><br>> set(<FLAGS>, ${MY_FLAGS});<br>><br>><br>><br>> In the documentation, here:<br>><br>><br>><br>> <a href="http://cmake.org/Wiki/CMake_Useful_Variables#Expansion_Rules" target="_blank">http://cmake.org/Wiki/CMake_Useful_Variables#Expansion_Rules</a><br>
><br>><br>><br>> it hints at this being possible but doesn’t explain, at least not so that I<br>> understand.<br>><br>><br>><br>> Thanks,<br>><br>> -David<br>><br>><br>><br>><br>
><u></u><u></u></p></div></div><p class="MsoNormal">> _______________________________________________<br>> Powered by <a href="http://www.kitware.com" target="_blank">www.kitware.com</a><br>><br>> Visit other Kitware open-source projects at<br>
> <a href="http://www.kitware.com/opensource/opensource.html" target="_blank">http://www.kitware.com/opensource/opensource.html</a><br>><br>> Please keep messages on-topic and check the CMake FAQ at:<br>> <a href="http://www.cmake.org/Wiki/CMake_FAQ" target="_blank">http://www.cmake.org/Wiki/CMake_FAQ</a><br>
><br>> Follow this link to subscribe/unsubscribe:<br>> <a href="http://www.cmake.org/mailman/listinfo/cmake" target="_blank">http://www.cmake.org/mailman/listinfo/cmake</a><br>><br><br>The wiki page is simply misleading. You cannot set those from the<br>
CMake language. CMake decides on their values in internal code, and<br>then substitutes appropriately when generating make files or<br>solution/project files for the build system.<br><br>You can set things the "CMAKE_CXX_FLAGS" which eventually get<br>
translated into the substitution that CMake performs, but you cannot<br>alter "<FLAGS>" in the rules variables.<br><br><br>HTH,<br>David<br>_______________________________________________<br>Powered by <a href="http://www.kitware.com" target="_blank">www.kitware.com</a><br>
<br>Visit other Kitware open-source projects at <a href="http://www.kitware.com/opensource/opensource.html" target="_blank">http://www.kitware.com/opensource/opensource.html</a><br><br>Please keep messages on-topic and check the CMake FAQ at: <a href="http://www.cmake.org/Wiki/CMake_FAQ" target="_blank">http://www.cmake.org/Wiki/CMake_FAQ</a><br>
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</div></div></div></div></blockquote></div><br>