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Clarify the DLL hell problem

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DRC
2010-02-25 06:21:12 +00:00
parent 5c8514046b
commit bb4cee56c8
1 changed files with 12 additions and 6 deletions
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18
README-turbo.txt
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@@ -65,7 +65,7 @@ links to the libjpeg dynamic library located in /opt/libjpeg-turbo/{lib}. This
will effectively accelerate every dynamically linked libjpeg application on the
system.
The Windows version of libjpeg-turbo installs jpeg62.dll into
The Windows distribution of the libjpeg-turbo SDK installs jpeg62.dll into
c:\libjpeg-turbo\bin, and the PATH environment variable can be modified such
that this directory is searched before any others that might contain
jpeg62.dll. However, if jpeg62.dll also exists in an application's install
@@ -74,11 +74,17 @@ if an application ships with jpeg62.dll, then back up the application's version
of jpeg62.dll and copy c:\libjpeg-turbo\bin\jpeg62.dll into the application's
install directory to accelerate it.
libjpeg-turbo's version of jpeg62.dll requires the Visual C++ 2008 C run time
DLL (msvcr90.dll). This library ships with more recent versions of Windows,
but users of older versions can obtain it from the Visual C++ 2008
Redistributable Package, which is available as a free download from Microsoft's
web site.
The version of jpeg62.dll distributed in the libjpeg-turbo SDK requires the
Visual C++ 2008 C run time DLL (msvcr90.dll). This library ships with more
recent versions of Windows, but users of older versions can obtain it from the
Visual C++ 2008 Redistributable Package, which is available as a free download
from Microsoft's web site.
NOTE: Features of libjpeg which require passing a C run time structure, such
as a file handle, from an application to libjpeg will probably not work with
the distributed version of jpeg62.dll unless the application is also built to
use the Visual C++ 2008 C run time DLL. In particular, this affects
jpeg_stdio_dest() and jpeg_stdio_src().
Mac applications typically embed their own copies of libjpeg.62.dylib inside
the (hidden) application bundle, so it is not possible to globally replace