Changes between Initial Version and Version 1 of AppLibraries

Timestamp:

Jun 4, 2009, 3:53:41 PM (15 years ago)

Author:

davea

Comment:

--

AppLibraries

@@ +1 @@
+Applications can use dynamic libraries;
+just include them in the [UpdateVersions#multifile multi-file application].
+
+A problem arises if you support multiple platforms,
+and the libraries for the different platforms have the same name.
+In BOINC, if files are called the same, they must be the same file.
+
+For example, suppose you support both Win32 and Win64,
+and you use a DLL "vcomp90.dll" that has 32- and 64-bit versions.
+If you install the 32-bit app first,
+it will end up trying to link the 64-bit library, and will crash.
+
+The solution is to give the libraries different physical names
+but the same logical name.
+Do this as follows:
+
+ * In the 32-bit app, call the file '''vcomp90.dll=vcomp90_v1.0_32bit.dll'''. This will be copied as "vcomp90_v1.0_32bit.dll" to the download directory, and  used as "vcomp90.dll" on the client.
+
+ * Then, add another file called '''vcomp90.dll=vcomp90_v1.0_32bit.dll.file_ref_info''' containing just:
+{{{
+<copy_file/>
+}}}
+This will ensure the file is *copied* to '''vcomp90.dll''', instead of linked, 
+since Windows obviously won't understand BOINC soft links when trying to find 
+the DLL.