Mercurial > sdl-ios-xcode
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Fixed bug #176
[I'm fixing this for the public headers, but I'm not going to bother for the SDL library code (yet)]
To clarify: Normaly, GCC (or, to be precise, the preprocessor) will ignore
this, and compile the code happily. However, one can specify -Wundef to get a
warning about this.
One can probably argue whether to consider this a bug or not; but I think that
(a) from a semantic point of view, using "#if FOO" when FOO is not defined is
strange, and (b) since it is possible to trigger a warning about this, and a
trivial fix exists, it should be corrected.
I can think of two alternative patches, BTW:
1) Simply use #define HAVE_FOO 0, instead of not defining HAVE_FOO at all
2) Change
#if HAVE_FOO
to
#if HAVE_FOO+0
which always does the right thing.
But I think I still prefer the attached patch :-).
author | Sam Lantinga <slouken@libsdl.org> |
---|---|
date | Thu, 13 Apr 2006 13:38:40 +0000 |
parents | 74212992fb08 |
children | 14717b52abc0 |
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<!DOCTYPE HTML PUBLIC "-//Norman Walsh//DTD DocBook HTML 1.0//EN"> <HTML ><HEAD ><TITLE >Introduction</TITLE > </HEAD ><BODY BGCOLOR="#FFF8DC" TEXT="#000000" LINK="#0000ee" VLINK="#551a8b" ALINK="#ff0000" ><DIV CLASS="NAVHEADER" > <HR ALIGN="LEFT" WIDTH="100%"></DIV ><DIV CLASS="PREFACE" ><H1 ><A NAME="AEN8" >Introduction</A ></H1 ><P >This library is designed to make it easy to write games that run on Linux, Win32 and BeOS using the various native high-performance media interfaces, (for video, audio, etc) and presenting a single source-code level API to your application. This is a fairly low level API, but using this, completely portable applications can be written with a great deal of flexibility.</P ><P >The library is loaded as a dynamically linked library on its native platform, and is currently compiled natively for Linux, compiled for Win32 using a Linux hosted GCC <A HREF="http://www.libsdl.org/Xmingw32/" TARGET="_top" >cross-compilation</A > environment, and compiled using the EGCS C++ compiler under BeOS.</P ><P >An introduction to SDL can be found online at: <A HREF="http://www.libsdl.org/intro/toc.html" TARGET="_top" >http://www.libsdl.org/intro/</A > </P ><P >There are code examples on each of the main library pages, and there are fully fleshed example C++ classes and programs in the examples archive, available on the <A HREF="http://www.libsdl.org/download.html" TARGET="_top" >SDL download page</A >.</P ><P >For an introduction to basic multi-media programming concepts, you might try some of the following links: <P ></P ><UL ><LI ><P ><A HREF="http://www.ziron.com/links/" TARGET="_top" >Game Programming Links</A ></P ></LI ><LI ><P ><A HREF="http://developer.dungeon-crawl.com/" TARGET="_top" >Game Developer Search Engine</A ></P ></LI ></UL ></P ><P >Enjoy!</P ><P > Sam Lantinga <TT CLASS="EMAIL" ><<A HREF="mailto:slouken@libsdl.org" ><A HREF="mailto:slouken@libsdl.org" TARGET="_top" >slouken@libsdl.org</A ></A >></TT ></P > <P> <br><br><HR> <H1>Table of Contents</H1> <UL> <LI><A HREF="html/index.html">Full Table of Contents</A></LI> <LI><A HREF="html/guide.html">The SDL Guide</A></LI> <LI><A HREF="html/reference.html">The SDL Reference</A></LI> <UL> <LI><A HREF="html/general.html">Initialization</A></LI> <LI><A HREF="html/video.html">Video</A></LI> <LI><A HREF="html/wm.html">Window Manager</A></LI> <LI><A HREF="html/event.html">Event Handling</A></LI> <LI><A HREF="html/joystick.html">Joystick</A></LI> <LI><A HREF="html/audio.html">Audio</A></LI> <LI><A HREF="html/cdrom.html">CDROM</A></LI> <LI><A HREF="html/thread.html">Threads</A></LI> <LI><A HREF="html/time.html">Timers</A></LI> </UL> </UL> </DIV ></BODY ></HTML >