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2. Summary

In order to compile the libraries, you need to compile and install the following packages first (if you don't already have them):

You may also need to install some of the following libraries and packages described below. Most of these packages are optional, but some are required.

`ffcall libraries (HIGHLY RECOMMENDED)'
This is a library that provides stack-frame handling for NSInvocation and NSConnection. This library is highly recommended. The previous builtin method for stack frame handling is no longer supported and may be removed in the future. ffcall is under GNU GPL. As a special exception, if used in GNUstep or in derivate works of GNUstep, the included parts of ffcall are under GNU LGPL.

`libffi library (OPTIONAL)'
This is a library that provides stack frame handling for NSInvocation and NSConnection similar to ffcall. Use this instead of ffcall. You don't need both.

`WindowMaker (Version >= 0.62) (OPTIONAL)'
GNUstep and WindowMaker work together to provide a consistant interface. Although it is not required, GNUstep will work much better if you use it with the WindowMaker window manager. In addition, WindowMaker includes some functionality that GNUstep uses that would otherwise not be available. Get WindowMaker from http://www.windowmaker.org.

`libxml2 (RECOMMENDED)'
The libxml library (Version 2) is used to translate some of the documentation for GNUstep and to provide suport for MacOS-X compatible XML-based property-lists. It is recommended but not currently required.

`The TIFF library (libtiff) (Version 3.4beta36 or greater) (REQUIRED)'
The GUI library uses this to handle loading and saving TIFF images.

`openssl (OPTIONAL)'
The openssl library is used to provide support for https connections by the NSURL and HSURLHandle classes. This functionality is compiled as a separate bundle since the OpenSSL license is not compatible with GPL, and in the hopes that if someone writes an openssl replacement, it can quickly be used by creating another bundle.

`libiconv (OPTIONAL)'
Note: Do not install this library unless you are sure you need it. You probably don't need it except perhaps on MinGW. Unicode support functions (iconv) come with glibc version 2.1 or greater. If you don't have glibc (try iconv --version), you can get the separate libiconv library from http://clisp.cons.org/~haible/packages-libiconv.html. However, neither one is required to use GNUstep.

`gnustep-objc package (for gcc version < 3.0 ONLY) (RECOMMENDED)'
Note: Do not install this library unless you are sure you need it. You probably don't need it except on MinGW. This is a special version of the Objective-C runtime that include several bug fixes and features that were not in gcc versions previous to 3.0. It is available at ftp://ftp.gnustep.org/pub/gnustep/libs which compiles using the GNUstep Makefile package (so you don't have to get the entire gcc dist). Make sure to set the THREADING variable in the GNUmakefile. It's possible to compile the library static (make shared=no) and just copy to the place where the gcc libobjc library is (type gcc -v to get this location). Note you have to install gnustep-make (below) before installing this library.

`GDB (OPTIONAL)'
GDB can be obtained from ftp://ftp.gnu.org/gnu/gdb. As of release 6.0, gdb has special support for debugging Objective-C programs.
`TeX (OPTIONAL)'
You need a TeX implementation, like tetex, to compile some of the documentation (although most of that is available on the web).


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