CSCI 4530/6530 Advanced Computer Graphics
Spring 2015

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    memory debugging
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Academic Integrity

Downloading and Installing or Upgrading Cygwin

  1. Go to and click the "Install or Update now!" link (in the middle of the page, or the side, with the Cygwin icon above it) and download the setup file to somewhere where you can find it. There are both 32 and 64 bit versions; make sure you remember which one you get because you'll need to use the same setup file each time you go to install more packages or you'll end up with 2 Cygwin installations.

  2. Double click the setup file, click next, and then select the "Install From Internet" box, then click next again (keep all the settings here the same), then click next one more time.

  3. Make sure to set the local package directory to C:\cygwin (or C:\cygwin64 for the 64-bit version), then click next, and then next again. Here pick a mirror, any mirror, and then click next again.

  4. There's a ton of info on this next page of packages to choose and such, just keep the "Curr" choice selected at the top.

  5. You will need to install a number of extra packages for your work in this course:

    • First, type "zip" in the search box near the top of the installation window. Open up the "Archive" section, then locate the "zip" package. The description should be "zip: Info-ZIP compression utility" . Click on the word "Skip" on that line to indicate we want to install zip rather than skipping it. A version number should appear, like "".

    • Next, type "g++" in the search box. Open up the "Devel" section, and click on "Skip" for "gcc-g++: GNU Compiler Connection (C++)" until the version number appears.

    • Also, type "gdb" in the search box. Open up the "Devel" section, and select "gdb: The GNU Debugger" for installation.

    • Then, type "clang" in the search box. Click "Skip" for "clang: C/C++/ObjC compiler frontend based on LLVM" until the version number appears.

    • Finally, type "mingw" in the search box, open up the "Devel" section, and install "mingw-gcc-g++". (This is needed to run the Dr. Memory memory debugger.)

  6. Then go ahead and hit next. If a "Resolving Dependencies" window shows, make sure the "Select required packages" box is checked, hit next again and take a coffee break. Your computer is going to download a plethora of packages, and then install them. It may tell you that you have to reboot after the install, if it does, do so.

  7. Click finish and pat yourself on the back, you've finished a complete Cygwin install.

Helpful edits to the Cygwin .bashrc file

  1. First, locate your .bashrc file for the current user. This is probably c:\Cygwin\home\YOUR_USERNAME\.bashrc (or just ~/.bashrc from the Cygwin shell). Make a copy of this file and put it somewhere safe before making the changes below, so you can undo in case anything goes wrong.

  2. To quickly navigate to your Data Structures files, you can add a variable that points to that directory in your .bashrc file:


    Then at the Cygwin prompt, you can use that variable:
       cd $DS
  3. To make an alias for the MinGW compiler with the options necessary for Dr. Memory, add this to your .bashrc file:

       alias memg++='i686-pc-mingw32-g++.exe -static-libgcc -static-libstdc++ -ggdb'

    Then at the Cygwin prompt, you can type:
       memg++ -o foo.exe my_source_1.cpp my_source2.cpp
  4. Finally, let's add Dr. Memory to your Cygwin path (which is different from your Windows path that the Dr. Memory installer may have already edited automatically). At the end of the .bashrc, add this line:

       PATH=$PATH:/cygdrive/c/Program\ Files \ \(x86)/Dr.\ Memory/bin

    Now to run Dr. Memory from Cygwin, you can just type:

       drmemory -brief -batch -- foo.exe arg1 arg2

Note: You'll need to close & reopen Cygwin to after editing your .bashrc file.