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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple style='word-wrap: break-word;-webkit-nbsp-mode: space;-webkit-line-break: after-white-space'><div class=WordSection1><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D'>Jack,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D'><span style='mso-list:Ignore'>1.<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D'>As Michael mentioned – ensure that you are linking to the BLAS library:<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal style='margin-left:.25in'><span style='font-size:10.0pt;font-family:"Courier New";color:#1D1B11'>find_package(BLAS REQUIRED)<o:p></o:p></span></p><p class=MsoNormal style='margin-left:.25in'><span style='font-size:10.0pt;font-family:"Courier New";color:#1D1B11'>add_executable( foo ${sources} )<o:p></o:p></span></p><p class=MsoNormal style='margin-left:.25in'><span style='font-size:10.0pt;font-family:"Courier New";color:#1D1B11'>target_link_library( foo ${BLAS_LIBRARIES} )<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D'><span style='mso-list:Ignore'>2.<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D'>FYI – For the Makefile Generator, the object files are usually stored in a subdirectory named ‘CMakeFiles/<target_name>.dir’ You can run nm on these *.o files to examine the name mangling. When calling BLAS routines, I normally need to append an underscore to the call from C++.<o:p></o:p></span></p><p class=MsoListParagraph><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D'><span style='mso-list:Ignore'>3.<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D'>Eventually, you may want to consider using the FortranCInterface.cmake module to determine the current name mangling system. You can use this information along with CPP macros to ensure that your code ports to other compilers/platforms.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D'>-kt<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D'><o:p> </o:p></span></p><div style='border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in 4.0pt'><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><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>Jack Chessa<br><b>Sent:</b> Sunday, October 23, 2011 9:25 PM<br><b>To:</b> cmake@cmake.org<br><b>Subject:</b> [CMake] underscore mangling with blas and cmake<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I am new to cmake and have a question that I hope has a simple answer. I am building a simple C++ program that uses blas scopy. I am using<o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>find_package(BLAS REQUIRED)<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>to find blas on the system (OSX in this case), and the cmake step seems to find it, but when I go to the make step I get the <o:p></o:p></p></div><div><div><p class=MsoNormal>Undefined symbols:<o:p></o:p></p></div><div><p class=MsoNormal> "_scopy_", referenced from:<o:p></o:p></p></div><div><p class=MsoNormal> _main in blas_ex.cpp.o<o:p></o:p></p></div></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>I usually can fix this with the -fleading-underscore or -fnoleading-underscore or -Dadd_... but I am not really sure what is going on in the cmake build or the Makefile that cmake creates. I don't see any .o files to nm on either. So my question is what is the best way to deal with underscore issues in cmake? Does anyone have a simple example for using cmake to build a c++ program with blas or lapack.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Thanks<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p><div><div><div><div><p class=MsoNormal><span class=apple-style-span><span style='font-size:9.0pt;font-family:"Helvetica","sans-serif"'>Jack Chessa</span></span><o:p></o:p></p></div><div><div><div><div><div><div><div><div><div><div><p class=MsoNormal><span style='font-size:9.0pt;font-family:"Helvetica","sans-serif";color:black'>Associate Professor</span><o:p></o:p></p></div></div><div><div><p class=MsoNormal><span style='font-size:9.0pt;font-family:"Helvetica","sans-serif";color:black'>Department of Mechanical Engineering</span><o:p></o:p></p></div></div><div><div><p class=MsoNormal><span style='font-size:9.0pt;font-family:"Helvetica","sans-serif";color:black'>University of Texas at El Paso</span><o:p></o:p></p></div></div><div><div><p class=MsoNormal><span style='font-size:9.0pt;font-family:"Helvetica","sans-serif";color:black'>Email:<span class=apple-tab-span> </span><a href="mailto:jfchessa@utep.edu">jfchessa@utep.edu</a></span><o:p></o:p></p></div></div><div><div><p class=MsoNormal><span style='font-size:9.0pt;font-family:"Helvetica","sans-serif";color:black'>Office:<span class=apple-tab-span> </span>A309</span><o:p></o:p></p></div></div><div><div><p class=MsoNormal><span style='font-size:9.0pt;font-family:"Helvetica","sans-serif";color:black'>Voice:<span class=apple-tab-span> </span>(915) 747-6900</span><o:p></o:p></p></div></div><div><div><p class=MsoNormal><span style='font-size:9.0pt;font-family:"Helvetica","sans-serif";color:black'>Fax:<span class=apple-tab-span> </span>(915) 747-5019</span><o:p></o:p></p></div></div><div><div><p class=MsoNormal><span style='font-size:9.0pt;font-family:"Helvetica","sans-serif";color:black'>Web:<span class=apple-tab-span> </span><a href="http://utminers.utep.edu/jfchessa/index.html">http://utminers.utep.edu/jfchessa/index.html</a></span><o:p></o:p></p></div></div></div></div></div></div></div></div></div><div><p class=MsoNormal> <o:p></o:p></p></div></div></div><div><p class=MsoNormal><o:p> </o:p></p></div></div><p class=MsoNormal><o:p> </o:p></p></div><p class=MsoNormal><o:p> </o:p></p></div></div></div></body></html>