1 .. -*- coding: utf-8; -*-

     2 .. include:: HEADER.rst

     3 

     4 ===========================

     5  Reducing binary code size

     6 ===========================

     7 .. contents::

     8 

     9 Common receipt

    10 ==============

    11 

    12 Configure build with disabling unused features e.g.::

    13 

    14   $ ./configure --without-png

    15 

    16 Link dynamically instead statically (on your platform shared library may be

    17 already present).

    18 

    19 Avoid debug build. Make release/final build instead debug.

    20 

    21 Use packers. Packer compress binary so binary smaller. When program load

    22 decompress itself, so startup time increase.

    23 

    24 Binary packers::

    25 

    26   http://upx.sourceforge.net

    27     Home page.

    28 

    29 GCC

    30 ======

    31 

    32 Use ``-Os`` when produces ``*.o`` files.

    33 

    34 Use ``-s`` when produces executable. And ``--remove-section=.comment`` and

    35 ``--remove-section=.note"``.

    36 

    37 Use::

    38 

    39   $ strip --strip-all <executable>

    40 

    41 and::

    42 

    43   $ gcc -ffunction-sections -fdata-sections -c -o my.o my.c

    44   $ gcc -Wl,--gc-sections -o my my.o

    45 

    46 MSVC

    47 ====

    48 

    49 Use ``/Os`` when produces ``*.obj`` files.

    50