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<p class="MsoNormal">How would one set a variable containing multiple definitions to be passed to target_compile_definitions() ?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><b><span style="font-size:12.0pt;color:black">From: </span></b><span style="font-size:12.0pt;color:black">Chuck Atkins <chuck.atkins@kitware.com><br>
<b>Date: </b>Friday, October 12, 2018 at 1:45 PM<br>
<b>To: </b>Rob Boehne <robb@datalogics.com><br>
<b>Cc: </b>CMake Mail List <cmake@cmake.org><br>
<b>Subject: </b>Re: [CMake] Building arguments to target_comple_definitions()<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"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">So in CMake parlance, what type is the last argument to target_compile_definitions? Is it a list, string or something else?<o:p></o:p></p>
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<p class="MsoNormal">It's a series of VISIBILITY_SPECIFIER DEF1 DEF2 ... DEFN, so the visibility specifier followed by a list of definitions, optionally followed by another visibility specifier and list of definitions, etc.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="font-family:"Courier New"">add_library(Foo OBJECT Foo.cxx)</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"Courier New"">target_compile_definitions(Foo</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"Courier New""> PUBLIC</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"Courier New""> <span style="background:yellow;mso-highlight:yellow">
COMMON_DEF_1 COMMON_DEF_2</span></span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"Courier New""> PRIVATE</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"Courier New""> FOO_SPECIFIC_DEF=42</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"Courier New"">)</span><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">will translate to something like:<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="font-family:"Courier New"">c++ -DCOMMON_DEF_1 -DCOMMON_DEF_2 -DFOO_SPECIFIC_DEF=4 -o Foo.cxx.o -c Foo.cxx</span><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">- Chuck<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span style="font-size:12.0pt;color:black">From:
</span></b><span style="font-size:12.0pt;color:black">Chuck Atkins <<a href="mailto:chuck.atkins@kitware.com" target="_blank">chuck.atkins@kitware.com</a>><br>
<b>Date: </b>Thursday, October 11, 2018 at 2:55 PM<br>
<b>To: </b>Rob Boehne <<a href="mailto:robb@datalogics.com" target="_blank">robb@datalogics.com</a>><br>
<b>Cc: </b>CMake Mail List <<a href="mailto:cmake@cmake.org" target="_blank">cmake@cmake.org</a>><br>
<b>Subject: </b>Re: [CMake] Building arguments to target_comple_definitions()</span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">So, are you suggesting that I make a “dummy” target and fill it with the common options in compile_definitions() and include_directories() (et. al.)<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Then make my OBJECT libraries (and the shared library) depend on the “dummy” target?
<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">If that’s not the suggestion, I’m afraid I don’t see how I can use this to set the common flags<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">That's certainly one way you can solve the problem, i.e. making an interface library with the common defs, and a good idea at that, but that's not what I was referring to. I was
simply tying to explain that the error your getting trying to pass arguments to target_compile_options is because you're missing the visibility argument.<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">- Chuck<o:p></o:p></p>
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