ref: 9e708eb5fbc2138cf7e2a8468ebf6d1b209e2703
dir: /docs/BUILD/
FreeType 2 compilation how-to
=============================
Introduction
------------
Welcome to the FreeType 2 library. You'll find in this document
instructions on how to compile the library on your favorite platform.
I. QUICK COMMAND-LINE GUIDE
---------------------------
Install GNU Make, then try the following on Unix or any system with
gcc:
make // this will setup the build
make // this will build the library
On Win32 + Visual C++:
make setup visualc // setup the build for VisualC++ on Win32
make // build the library
Then, go to the `demos' directory and type
make
Note that on Unix, the first `make' invocation will run a configure
script (which is located in `freetype2/builds/unix/'. You can also
pass parameters to this script with the CFG variable, as in:
make CFG="--prefix=/usr/local"
make
If this doesn't work, read the following.
II. COMMAND-LINE COMPILATION
----------------------------
Note that if you do not want to compile FreeType 2 from a command
line shell, please skip to section III below (DETAILED COMPILATION).
FreeType 2 includes a powerful and flexible build system that allows
you to easily compile it on a great variety of platforms from the
command line. To do so, just follow these simple instructions:
a. Install GNU Make
Because GNU Make is the only Make tool supported to compile
FreeType 2, you should install it on your machine.
The FreeType 2 build system relies on many features special to GNU
Make -- trying to build the library with any other Make tool will
*fail*.
Make sure that you are invoking GNU Make from the command line, by
typing something like:
make -v
to display its version number.
b. Invoke `make'
Go to the root directory of FreeType 2, then simply invoke GNU
Make from the command line. This will launch the FreeType 2 host
platform detection routines. A summary will be displayed, for
example, on Win32:
==============================================================
FreeType build system -- automatic system detection
The following settings are used:
platform win32
compiler gcc
configuration directory ./builds/win32
configuration rules ./builds/win32/w32-gcc.mk
If this does not correspond to your system or settings please
remove the file 'config.mk' from this directory then read the
INSTALL file for help.
Otherwise, simply type 'make' again to build the library.
=============================================================
If the detected settings correspond to your platform and compiler,
skip to step e. Note that if your platform is completely alien to
the build system, the detected platform will be `ansi'.
c. Configure the build system for a different compiler
If the build system correctly detected your platform, but you want
to use a different compiler than the one specified in the summary
(for most platforms, gcc is the defaut compiler), invoke GNU Make
with
make setup <compiler>
For example:
to use Visual C++ on Win32, type: "make setup visualc"
to use LCC-Win32 on Win32, type: "make setup lcc"
The <compiler> name to use is platform-dependent. The list of
available compilers for your system is available in the file
`builds/<system>/detect.mk' (note that we hope to make the list
displayed at user demand in the final release).
If you are satisfied by the new configuration summary, skip to
step e.
d. Configure the build system for an unknown platform/compiler
The auto-detection/setup phase of the build system copies a file
to the current directory under the name `config.mk'.
For example, on OS/2+gcc, it would simply copy
`builds/os2/os2-gcc.mk' to `./config.mk'.
If for some reason your platform isn't correctly detected, copy
manually the configuration sub-makefile to `./config.mk' and go to
step e.
Note that this file is a sub-Makefile used to specify Make
variables for compiler and linker invocation during the build.
You can easily create your own version from one of the existing
configuration files, then copy it to the current directory under
the name `./config.mk'.
e. Build the library
The auto-detection/setup phase should have copied a file in the
current directory, called `./config.mk'. This file contains
definitions of various Make variables used to invoke the compiler
and linker during the build.
To launch the build, simply invoke GNU Make again: The top
Makefile will detect the configuration file and run the build with
it.
f. Build the demonstration programs
III. DETAILED COMPILATION PROCEDURE
-----------------------------------
If you don't want to compile FreeType 2 from the command-line (for
example if you use a graphical IDE on a Mac or Windows), you will
need to understand how the FreeType files are organized.
FreeType 2 has a very modular design, and it is made of several
components. Each component must be compiled as a stand-alone object
file, even if it is really made of several C source files. For
example, the `base layer' component is made of the following C
files:
src/
base/
ftcalc.c - computations
ftextend.c - extensions support
ftlist.c - simple list management
ftobjs.c - object management
ftoutln.c - simple outline processing
ftstream.c - stream input
However, you can create a single object file by compiling the file
`src/base/ftbase.c', which basically contains
#include <base/ftcalc.c>
#include <base/ftobjs.c>
#include <base/ftstream.c>
#include <base/ftlist.c>
#include <base/ftoutln.c>
#include <base/ftextend.c>
Similarly, each component has a single `englobing' C file to compile
it as a stand-alone object:
src/autohint/autohint.c - the autohinting module
src/base/ftbase.c - the base layer, high-level interface
src/cache/ftcache.c - a glyph and image caching system
(still experimental)
src/cff/cff.c - the OpenType font driver
src/cid/type1cid.c - the CID-keyed font driver
src/psaux/psaux.c - the PS support module
src/psnames/psnames.c - a support module to handle PS glyph
names
src/raster1/raster1.c - the monochrome raster module
src/sfnt/sfnt.c - the `sfnt' module
src/smooth/smooth.c - the anti-aliasing raster module
src/truetype/truetype.c - the TrueType font driver
src/type1/type1.c - the Type 1 font driver
The last module of FreeType 2, winfonts (implementing support for
Windows FNT format), is a single file.
To compile one component, do the following:
- Add the top-level `include' directory to your compilation
include path
- Add the `src' directory to your compilation include path.
- Compile the component `source' file (see list below); you don't
need to be in the component's directory.
For example, the following line can be used to compile the truetype
driver on Unix:
cd freetype2/
cc -c -Iinclude -Isrc src/truetype/truetype.c
Alternatively:
cd freetype2/src/truetype
cc -c -I../../include -I.. truetype.c
Finally, FreeType 2 contains some other components:
src/base/ftsystem.c - system-specific memory and i/o support
src/base/ftinit.c - initialization layer
src/base/ftdebug.c - debugging component (empty in release
build)
src/base/ftglyph.c - optional convenience functions
All font drivers are optional. The `sfnt', `psaux', and `psnames'
modules are mandatory for certain drivers. However, you may need to
update the list of drivers that are statically linked to the
library, which is located in the configuration file
`include/freetype/config/ftmodule.h'.
IV. Support for flat-directory compilation
------------------------------------------
It is now possible to put all FreeType 2 source files into a single
directory, with the exception of the `include' hierarchy.
Note that you still need to only compile the `wrapper' sources
described above. Define the `FT_FLAT_COMPILE' macro when
compiling. Here an example:
1. Copy all files in current directory:
cp freetype2/src/base/*.[hc] .
cp freetype2/src/raster1/*.[hc] .
cp freetype2/src/smooth/*.[hc] .
etc.
2. Compile sources:
cc -c -DFT_FLAT_COMPILE -Ifreetype2/include ftsystem.c
cc -c -DFT_FLAT_COMPILE -Ifreetype2/include ftinit.c
cc -c -DFT_FLAT_COMPILE -Ifreetype2/include ftdebug.c
cc -c -DFT_FLAT_COMPILE -Ifreetype2/include ftbase.c
etc.
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