# Compilation and Installation

1. Unix / X11
2. Windows
3. VMS
4. Other

## 1. Unix/X11 Compilation and Installation

### 1.1 Compilation

Mesa may be compiled in several different ways:

- Stand-alone/Xlib mode - Mesa will be compiled as a software renderer using Xlib to do all rendering. The libGL.so library will be a self-contained rendering library that will allow you to run OpenGL/GLX applications on any X server (regardless of whether it supports the GLX X server extension). You will not be able to use hardware 3D acceleration.

  To compile stand-alone Mesa type make in the top-level directory. You'll see a list of supported system configurations. Choose one from the list (such as linux-x86), and type:

          make linux-x86

  This will produce libGL.so and several other libraries

- DRI/accelerated - The DRI hardware drivers for accelerated OpenGL rendering (for ATI, Intel, Matrox, etc) will be built. The libGL.so library will support the GLX extension and will load/use the DRI hardware drivers.

  Prerequisites:

  1. For Mesa 7.0.2 DRM version 2.3 is required.

     To check if you already have it, run:
     `pkg-config --modversion libdrm`

     You can download and install a tarball release or get the code from git with:
     `git clone git://anongit.freedesktop.org/git/mesa/drm`
     Then revert to the drm-2.3.0 tag with:
     `git-reset --hard drm-2.3.0`

  2. Relatively recent X.org release. Mesa depends on a number of X header and library files.

  Build Mesa and the DRI hardware drivers by running

         make linux-dri

  There are also `linux-dri-x86`, `linux-dri-x86-64`, and `linux-ppc` configurations which are optimized for those architectures.

Later, if you want to rebuild for a different configuration run `make realclean` before rebuilding.

### 1.2 The libraries

When compilation has finished, look in the top-level `lib/` (or `lib64/`) directory. You'll see a set of library files similar to this:

    lrwxrwxrwx    1 brian    users          10 Mar 26 07:53 libGL.so -> libGL.so.1*
    lrwxrwxrwx    1 brian    users          19 Mar 26 07:53 libGL.so.1 -> libGL.so.1.5.060100*
    -rwxr-xr-x    1 brian    users     3375861 Mar 26 07:53 libGL.so.1.5.060100*
    lrwxrwxrwx    1 brian    users          11 Mar 26 07:53 libGLU.so -> libGLU.so.1*
    lrwxrwxrwx    1 brian    users          20 Mar 26 07:53 libGLU.so.1 -> libGLU.so.1.3.060100*
    -rwxr-xr-x    1 brian    users      549269 Mar 26 07:53 libGLU.so.1.3.060100*
    lrwxrwxrwx    1 brian    users          12 Mar 26 07:53 libglut.so -> libglut.so.3*
    lrwxrwxrwx    1 brian    users          16 Mar 26 07:53 libglut.so.3 -> libglut.so.3.7.1*
    -rwxr-xr-x    1 brian    users      597754 Mar 26 07:53 libglut.so.3.7.1*
    lrwxrwxrwx    1 brian    users          11 Mar 26 08:04 libGLw.so -> libGLw.so.1*
    lrwxrwxrwx    1 brian    users          15 Mar 26 08:04 libGLw.so.1 -> libGLw.so.1.0.0*
    -rwxr-xr-x    1 brian    users       20750 Mar 26 08:04 libGLw.so.1.0.0*
    lrwxrwxrwx    1 brian    users          14 Mar 26 07:53 libOSMesa.so -> libOSMesa.so.6*
    lrwxrwxrwx    1 brian    users          23 Mar 26 07:53 libOSMesa.so.6 -> libOSMesa.so.6.1.060100*
    -rwxr-xr-x    1 brian    users       23871 Mar 26 07:53 libOSMesa.so.6.1.060100*

libGL is the main OpenGL library (i.e. Mesa).
libGLU is the OpenGL Utility library.
libglut is the GLUT library.
libGLw is the Xt/Motif OpenGL drawing area widget library.
libOSMesa is the OSMesa (Off-Screen) interface library.

If you built the DRI hardware drivers, you'll also see the DRI drivers:

    -rwxr-xr-x   1 brian users 15607851 Jul 21 12:11 ffb_dri.so*
    -rwxr-xr-x   1 brian users 15148747 Jul 21 12:11 i810_dri.so*
    -rwxr-xr-x   1 brian users 14497814 Jul 21 12:11 i830_dri.so*
    -rwxr-xr-x   1 brian users 16895413 Jul 21 12:11 i915_dri.so*
    -rwxr-xr-x   1 brian users 11320803 Jul 21 12:11 mach64_dri.so
    -rwxr-xr-x   1 brian users 11418014 Jul 21 12:12 mga_dri.so
    -rwxr-xr-x   1 brian users 11064426 Jul 21 12:12 r128_dri.so
    -rwxr-xr-x   1 brian users 11849858 Jul 21 12:12 r200_dri.so
    -rwxr-xr-x   1 brian users 16050488 Jul 21 12:11 r300_dri.so*
    -rwxr-xr-x   1 brian users 11757388 Jul 21 12:12 radeon_dri.so
    -rwxr-xr-x   1 brian users 11232304 Jul 21 12:13 s3v_dri.so
    -rwxr-xr-x   1 brian users 11062970 Jul 21 12:13 savage_dri.so
    -rwxr-xr-x   1 brian users 11214212 Jul 21 12:13 sis_dri.so
    -rwxr-xr-x   1 brian users 11368736 Jul 21 12:13 tdfx_dri.so
    -rwxr-xr-x   1 brian users 10598868 Jul 21 12:13 trident_dri.so
    -rwxr-xr-x   1 brian users 10997120 Jul 21 12:13 unichrome_dri.so

### 1.3 Running the demos

If you downloaded/unpacked the MesaDemos-x.y.z.tar.gz archive or obtained Mesa from CVS, the progs/ directory will contain a bunch of demonstration programs.

Before running a demo, you may have to set an environment variable (such as LD_LIBRARY_PATH on Linux) to indicate where the libraries are located. For example:

> cd into the Mesa lib/ directory.
> setenv LD_LIBRARY_PATH ${cwd} (if using csh or tcsh shell)
> or,
> export LD_LIBRARY_PATH=${PWD} (if using bash or sh shell)

Next, change to the Mesa/demos/ directory:

> cd ../progs/demos

Run a demo such as gears:

> ./gears

If this doesn't work, try the Mesa/progs/xdemos/glxinfo program and see that it prints the expected Mesa version number.

If you're using Linux or a similar OS, verify that the demo program is being linked with the proper library files:

> ldd gears

You should see something like this:

            libglut.so.3 => /home/brian/Mesa/lib/libglut.so.3 (0x40013000)
            libGLU.so.1 => /home/brian/Mesa/lib/libGLU.so.1 (0x40051000)
            libGL.so.1 => /home/brian/Mesa/lib/libGL.so.1 (0x400e0000)
            libc.so.6 => /lib/i686/libc.so.6 (0x42000000)
            libm.so.6 => /lib/i686/libm.so.6 (0x403da000)
            libX11.so.6 => /usr/X11R6/lib/libX11.so.6 (0x403fc000)
            libXmu.so.6 => /usr/X11R6/lib/libXmu.so.6 (0x404da000)
            libXt.so.6 => /usr/X11R6/lib/libXt.so.6 (0x404f1000)
            libXi.so.6 => /usr/X11R6/lib/libXi.so.6 (0x40543000)
            libstdc++.so.5 => /usr/lib/libstdc++.so.5 (0x4054b000)
            libgcc_s.so.1 => /lib/libgcc_s.so.1 (0x405fd000)
            libXext.so.6 => /usr/X11R6/lib/libXext.so.6 (0x40605000)
            libpthread.so.0 => /lib/i686/libpthread.so.0 (0x40613000)
            /lib/ld-linux.so.2 => /lib/ld-linux.so.2 (0x40000000)
            libdl.so.2 => /lib/libdl.so.2 (0x40644000)
            libSM.so.6 => /usr/X11R6/lib/libSM.so.6 (0x40647000)
            libICE.so.6 => /usr/X11R6/lib/libICE.so.6 (0x40650000)

Retrace your steps if this doesn't look right.

### 1.4 Installing the header and library files

The standard location for the OpenGL header files on Unix-type systems is in `/usr/include/GL/`. The standard location for the libraries is `/usr/lib/`. For more information see, the Linux/OpenGL ABI specification.

If you'd like Mesa to co-exist with another implementation of OpenGL that's already installed, you'll have to choose different directories, like `/usr/local/include/GL/` and `/usr/local/lib/`.

To install Mesa's headers and libraries, run `make install`. But first, check the Mesa/configs/default file and examine the values of the INSTALL_DIR and DRI_DRIVER_INSTALL_DIR variables. Change them if needed, then run `make install`.

The variable DESTDIR may also be used to install the contents to a temporary staging directory. This can be useful for package management. For example: `make install DESTDIR=/somepath/`

Note: at runtime you can use the LD_LIBRARY_PATH environment variable (on Linux at least) to switch between the Mesa libraries and other vendor's libraries whenever you want. This is a handy way to compare multiple OpenGL implementations.

### 1.5 pkg-config support

Running `make install` will install package configuration files for the pkg-config utility.

When compiling your OpenGL application you can use pkg-config to determine the proper compiler and linker flags.

For example, compiling and linking a GLUT application can be done with:

       gcc `pkg-config --cflags --libs glut` mydemo.c -o mydemo

## 2. Windows Compilation and Installation

Please see the README.WIN32 file.

## 3. VMS Compilation and Installation

Please see the README.VMS file.

## 4. Other systems

Documentation for other environments (some may be very out of date):

- README.GGI - GGI
- README.3DFX - 3Dfx/Glide driver
- README.AMIWIN - Amiga Amiwin
- README.BEOS - BeOS
- README.D3D - Direct3D driver
- README.DJ - DJGPP
- README.LYNXOS - LynxOS
- README.MINGW32 - Mingw32
- README.NeXT - NeXT
- README.OpenStep - OpenStep
- README.OS2 - OS/2
- README.WINDML - WindML