love2d.megasource/libs/freetype/docs/INSTALL.UNIX

This  document contains  instructions  on how  to  build the  FreeType
library on Unix  systems.  This also works for  emulations like Cygwin
or MSys on Win32:


  1. Ensure that you are using GNU Make
  -------------------------------------

    The FreeType build system  _exclusively_ works with GNU Make.  You
    will  not be  able to  compile the  library with  the instructions
    below using any other alternative (including BSD Make).

    Check that you have GNU make by running the command:

       make -v

    This should dump some text that begins with:

       GNU Make  <version number>
       Copyright (C) <year> Free Software Foundation Inc.

    Note that version  3.81 or higher is *required* or the  build will
    fail.

    It is also fine to have GNU Make under another name (e.g. 'gmake')
    if you use the MAKE variable as described below.

    As  a  special exception,  'makepp'  can  also  be used  to  build
    FreeType 2.  See the file docs/MAKEPP for details.

    For builds  with `cmake' please check file `CMakeLists.txt';  this
    is a contributed file not directly supported by the FreeType team.


  2. Regenerate the configure script if needed
  --------------------------------------------

    This only applies if you  are building a git snapshot or checkout,
    *not* if you grabbed the sources of an official release.

    You  need  to invoke  the  `autogen.sh'  script  in the  top-level
    directory  in order  to  create the  `configure'  script for  your
    platform.  Normally, this simply means typing:

      sh autogen.sh

    In case of problems, you may  need to install or upgrade Automake,
    Autoconf or Libtool.  See  `README.git' in the top-level directory
    for more information.


  3. Build and install the library
  --------------------------------

    Say

      ./configure --help

    to see  the list of  possible configuration options  and important
    environment  variables.  The ./configure script  will detect  some
    prerequisite  system  libraries  (libpng, brotli, etc.)  if  their
    headers are available at the default locations.

    The following  should work  on all Unix  systems where  the `make'
    command invokes GNU Make:

      ./configure [options]
      make
      make install           (as root)

    The default installation path  is `/usr/local'.  It can be changed
    with the `--prefix=<path>' option.  Example:

      ./configure --prefix=/usr

    When using  a different command  to invoke GNU Make,  use the MAKE
    variable.  For example,  if `gmake' is the command  to use on your
    system, do something like:

       MAKE=gmake ./configure [options]
       gmake
       gmake install            (as root)

    If  this still doesn't  work, there  must be  a problem  with your
    system (e.g., you are using a very old version of GNU Make).

    For library identification, FreeType's `configure' script uses the
    `pkg-config' interface: Assuming it  needs library `foo', it calls
    the  `pkg-config' program  to find  information on  library `foo',
    which in turn  looks for a `foo.pc' file installed  at the system.
    Some platforms,  however, don't come with  `pkg-support'; you then
    have  to  use environment  variables  as  described by  `configure
    --help'.  Example:

      LIBPNG_CFLAGS="-I/path/to/libpng/include/directory" \
      LIBPNG_LIBS="-L/path/to/libpng/lib/directory" \
      configure ...

    It  is possible  to  compile FreeType  in  a different  directory.
    Assuming the FreeType source  files in directory `/src/freetype' a
    compilation in directory `foo' works as follows:

      cd foo
      /src/freetype/configure [options]
      make
      make install


  3.1 Interdependency with HarfBuzz
  .................................

    Note that there  is a chicken-and-egg problem  currently since the
    HarfBuzz library  (used by the  auto-hinter to improve  support of
    OpenType  fonts)  depends on  FreeType,  which  can be  solved  as
    follows in case HarfBuzz is not yet installed on your system.

    1. Call    FreeType's     `configure'    script     with    option
       `--without-harfbuzz', then compile and install FreeType.

    2. Compile and install HarfBuzz.

    3. Call    FreeType's    `configure'   script    without    option
       `--without-harfbuzz' (after  executing `make  distclean'), then
       compile and install FreeType again.


----------------------------------------------------------------------

Copyright (C) 2003-2023 by
David Turner, Robert Wilhelm, and Werner Lemberg.

This  file is  part of  the FreeType  project, and  may only  be used,
modified,  and distributed  under the  terms of  the  FreeType project
license,  LICENSE.TXT.  By  continuing to  use, modify,  or distribute
this file you  indicate that you have read  the license and understand
and accept it fully.


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