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</o:shapelayout></xml><![endif]--></head><body lang=DE link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>Dear all,<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span lang=EN-US>i am trying to compile a Windows .DLL of IPOPT to use in my own modeling environment. Right now, I am using the precompiled binary but it seems to me that the included MUMPS Solver is not ideal for the problems I need to get solved.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>I decided to compile the IPOPT sourcecode in order to get access to the HSL Solvers MA27 and MA57. I followed the steps in the manuscript “Compiling IPopt and the Ipopt MATLAB interace under Windows”.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>I run a Windows 7 single-core 32-bit system. <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>I have installed MinGW </span><span lang=EN-US style='font-size:7.0pt;font-family:Courier'>20111118</span><span lang=EN-US><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>I downloaded the most recent IPOPT sourcecode and tried several other versions<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>I obtained all required third-party code<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>When in run the configure script with “—enable-shared” I get the error message “Error: Shared libraries are not avaiblable on MSYS. I am disabling your option”<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>After running the make scripts I obtain the file “ipopt.exe” (which, as I assume, contains the AMPL interface) but no DLL.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>So my question is: Is it possible to compile a Windows DLL of IPOPT on MINGW in order to get access to the HSL solvers, or am I restricted to using MUMPS forever?<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>I have also tried installing CYGWIN, but here I am not able to get all compilers and subprograms running. Is there a tutorial for setting up Cygwin for the compilation of IPOPT?<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Regards<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>Jochen Steimel<o:p></o:p></span></p></div></body></html>