Go to install Cygwin including bison 2.3-1, flex 2.5. 4a-3, gcc-core 3.4. 4-1, and make 3.81-1. Create a file called 'input.

Installing and Updating Cygwin for 64-bit versions of Windows

Run setup-x86_64.exe any time you want to update orinstall a Cygwin package for 64-bit windows. The signature for setup-x86_64.exe can be used to verify the validity ofthis binary.

Installing and Updating Cygwin for 32-bit versions of Windows

Run setup-x86.exe any time you want to update orinstall a Cygwin package for 32-bit windows. The signature for setup-x86.exe can be used to verify the validity ofthis binary.

Signing key transition

The key used to sign setup binaries has been updated. During the transitionperiod, signatures are made using both old (676041BA) and new (1A698DE9E2E56300)public keys here.See thismail for more details.

General installation notes

When installing packages for the first time, the setup programdoes not install every package. Only the minimal base packagesfrom the Cygwin distribution are installed by default, which takes up about 100 MB.

Clicking on categories and packages in the setup program package installationscreen allows you to select what is installed or updated.

Individual packages like bash, gcc, less, etc.are released independently of the Cygwin DLL, so the Cygwin DLL version is notuseful as a general Cygwin release number. The setup programtracks the versions of all installed components and provides the mechanismfor installing or updating everything available from this site forCygwin.

Once you've installed your desired subset of the Cygwin distribution,the setup program will remember what you selected, so re-running itwill update your system with any new package releases.

On Windows Vista and later, the setup program will check bydefault if it runs with administrative privileges and, if not, will tryto elevate the process. If you want to avoid this behaviour and installunder an unprivileged account just for your own usage, runsetup with the --no-admin option.

Q: How do I add a package to my existing Cygwin installation?

A: Run the setup program and select the package you want to add.

Tip: if you don't want to also upgrade existing packages, select 'Keep' at thetop-right of the package chooser page.

Q: Is there a command-line installer?

A: Yes and no. The setup program understandscommand-linearguments which allow you to control its behavior and chooseindividual packages to install. While this provides some functionalitysimilar to such tools as apt-get or yum it is not asfull-featured as those package managers.

Q: Why not use apt, yum, myfavourite package manager, etc.?

A: The basic reason for not using a more full-featured package manager is thatsuch a program would need full access to all of Cygwin's POSIX functionality. Thatis, however, difficult to provide in a Cygwin-free environment, such as exists onfirst installation. Additionally, Windows does not easily allow overwriting ofin-use executables so installing a new version of the Cygwin DLL while a packagemanager is using the DLL is problematic.

Q: How do I install everything?

A: You do not want to do this! This will install an enormous number of packagesthat you will never use, including debuginfo and source for every package.

If you really must do this, clicking on the 'Default' label next to the'All' category to change it to 'Install' will mark every Cygwin package forinstallation. Be advised that this will download and install tens of gigabytesof files to your computer.

Q: How do I verify the signature of setup?

A: e.g.

Q: What's the hash of setup?

A: See here

Q: How do I help improve setup?

A: See the setupproject page for more information.

Building pbrt-v2pbrt is designed to be easily ported to various platforms; the authorsregularly compile it on Mac OS X, Windows, and a variety of Linux variants.pbrt users have sent patches to ensure that it compiles cleanly on FreeBSD,OpenBSD, and other systems. We will happily incorporate patches to makethe system build on other platforms! (Please send patches or other notesabout issues with building pbrt to authors@pbrt.org.) Linux, OS X, and other Unix systemsOn Linux, OS X, and other Unix platforms, pbrt can be compiled witheither the provided Makefile or the provided SCons build files(see for information about SCons).Please see the notes below about installing OpenEXR libraries on yoursystem before building pbrt.The SCons build files build both debug and release configurations of thesystem, while the Makefile only builds a release build.

See comment at thetop of the Makefile for how to modify it to do a debug build instead.When using the Makefiles or SCons files, there are two important buildconfiguration options: whether or not the OpenEXR and TIFF image formatsare supported by the system or not, and how pbrt collects and reportsstatistics. OpenEXRIf you have theinstalled, then pbrt will read and write OpenEXR format images. A numberof the example scenes use OpenEXR image files. If you do have OpenEXRinstalled, then PBRTHASOPENEXR shouldbe #defined and the paths to the OpenEXR headers and librariesshould be set in the build rules as appropriate.On Mac OS X and Linux, OpenEXR compiles easily from the distributionfrom the.

Alternatively,most package or 'ports' systems provide an OpenEXR installation.Specifically:. On Ubuntu, run sudo apt-get install libopenexr-dev. On OS X with installed,run brew install openexr.(Please send anote if you can tell us equivalent commands on other systems so that we canadd them here!) TIFFWe provide a utility program to convert from high dynamic range EXRimages to low dynamic range TIFF images, exrtotiff. Thisprogram includes a rudimentary tone mapping pipeline and support for imagebloom and gamma correction. To build this program, modify the userconfiguration section appropriately in either Makefile or SCons file(depending on how you're building the system.) There is not currently anysupport for building this from the MSVC solution file on Windows.More comprehensive sets of programs to work with EXR images are availablefrom. Probes and Statisticspbrt no longer collects runtime rendering statistics by default.