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Diffstat (limited to 'Build/source/libs/libpng/libpng-src/projects/vstudio/readme.txt')
-rw-r--r-- | Build/source/libs/libpng/libpng-src/projects/vstudio/readme.txt | 44 |
1 files changed, 37 insertions, 7 deletions
diff --git a/Build/source/libs/libpng/libpng-src/projects/vstudio/readme.txt b/Build/source/libs/libpng/libpng-src/projects/vstudio/readme.txt index 38664638862..642a42b5893 100644 --- a/Build/source/libs/libpng/libpng-src/projects/vstudio/readme.txt +++ b/Build/source/libs/libpng/libpng-src/projects/vstudio/readme.txt @@ -1,9 +1,9 @@ VisualStudio instructions -libpng version 1.6.20 - December 3, 2015 +libpng version 1.6.21 - January 15, 2016 -Copyright (c) 1998-2010 Glenn Randers-Pehrson +Copyright (c) 2010,2013,2015 Glenn Randers-Pehrson This code is released under the libpng license. For conditions of distribution and use, see the disclaimer @@ -38,16 +38,17 @@ In particular the runtime library is the "MultiThreaded DLL" version. If you use Visual Studio defaults to build your application you will have no problems. -If you don't use the Visual Studio defaults your application must still be built -with the default runtime option (/MD). If, for some reason, it is not then your -application will crash inside libpng16.dll as soon as libpng tries to read -from a file handle you pass in. +If you don't use the Visual Studio defaults your application must still be +built with the default runtime option (/MD). If, for some reason, it is not +then your application will crash inside libpng16.dll as soon as libpng +tries to read from a file handle you pass in. If you do not want to use the DLL, for example for a very small application, the 'release library' configuration may be more appropriate. This is built with a non-standard runtime library - the "MultiThreaded" version. When you build your application it must be compiled with this option (/MT), otherwise -it will not build (if you are lucky) or crash (if you are not.) +it will not build (if you are lucky) or crash (if you are not.) See the +WARNING file that is distributed along with this readme.txt. Stop reading here ================= @@ -63,3 +64,32 @@ track down.) The debug build of libpng is minimally supported. Support for debug builds of zlib is also minimal. You really don't want to do this. + +WARNING +======= +Libpng 1.6.x does not use the default run-time library when building static +library builds of libpng; instead of the shared DLL runtime it uses a static +runtime. If you need to change this make sure to change the setting on all the +relevant projects: + + libpng + zlib + all the test programs + +The runtime library settings for each build are as follows: + + Release Debug + DLL /MD /MDd + Library /MT /MTd + +NOTICE that libpng 1.5.x erroneously used /MD for Debug DLL builds; if you used +the debug builds in your app and you changed your app to use /MD you will need +to change it back to /MDd for libpng 1.6.0 and later. + +The Visual Studio 2010 defaults for a Win32 DLL or Static Library project are +as follows: + + Release Debug + DLL /MD /MDd + Static Library /MD /MDd + |