Installation with Cygwin using the MSCV++ compiler

This section describes how you can compile IPOPT with the Microsoft Visual C++ compiler under Cygwin. Here you have two options for compiling the Fortran code in the third party dependencies:

• Using a Windows Fortran compiler, e.g. the Intel Fortran compiler, which is also able to compile Fortran 90 code. This would allow you to compile the MUMPS linear solver if you desire to do so.
• Using the f2c Fortran to C compiler, available for free at Netlib (see http://www.netlib.org/f2c). This can only compile Fortran 77 code (i.e., you won't be able to compile MUMPS). Before doing the following installation steps, you need to follow the instructions in
  $IPOPTDIR/BuildTools/compile_f2c/INSTALL.

Once you have settled on this, do the following:

1. Follow the instructions in Section 2.4.1 until Step 10 and stop after your downloaded the third party code.

2. Now you need to make sure that Cygwin knows about the native compilers. For this you need to edit the file cygwin.bat in the Cygwin base directory (usually C: $\backslash$ cygwin). Here you need to add a line like the following:

   call "C: $\backslash$ Program Files $\backslash$ Microsoft Visual Studio 8 $\backslash$ VC $\backslash$ vcvarsall.bat"

   On my computer, this set the environment variables to that I can use the MSVC++ compiler.

   If you want to use also a native Fortran compiler, you need to include something like this

   call "C: $\backslash$ Program Files $\backslash$ Intel $\backslash$ Fortran $\backslash$ compiler80 $\backslash$ IA32 $\backslash$ BIN $\backslash$ ifortvars.bat"

   You might have to search around a bit. The important thing is that, after your change, you can type ``cl'' in a newly opened Cygwin windows, and it finds the Microsoft C++ compiler (and if you want to use it, the Fortran compiler, such as the Intel's ifort).

3. Run the configuration script, and tell it that you want to use the native compilers:

   ./configure -enable-doscompile=msvc

   Make sure the last message is

   Main Ipopt configuration successful

4. If want to compile the AMPL solver executable, you need to compile the ASL library from a script. For this you need to change into the ASL compilation directory, execute the script compile_MS_ASL, and go back to the directory where you were:

   cd ThirdParty/ASL

   ./compile_MS_ASL

   cd -

5. Now you can compile the code with

   make,

   test the installation with

   make test,

   and install everything with

   make install