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The LIB file (import library) is used to link against a DLL at compile-time; it is not necessary for run-time linking. Unless the DLL is a Component Object Model (COM) server, the DLL file must be placed in one of the directories listed in the PATH environment variable, in the default system directory, or in the same directory as the program ...
If app1 depends on libfoo 1.2, and app2 depends on libfoo 2.0, and different versions of libfoo cannot be simultaneously installed, then app1 and app2 cannot simultaneously be used (or installed, if the installer checks dependencies). When possible, this is solved by allowing simultaneous installations of the different dependencies.
The name has the potential to change at future versions, but has not done so as far as of Version 17.0. Source code for runtime libraries is included in Visual C++ [19] for reference and debugging (e.g. in C:\Program Files\Microsoft Visual Studio 11.0\VC\crt\src).
DLL hell is an umbrella term for the complications that arise when one works with dynamic-link libraries (DLLs) used with older Microsoft Windows operating systems, [1] particularly legacy 16-bit editions, which all run in a single memory space.
Much modern source code uses "conditional compilation" to control which part of the source code to be used based on C pre-processor symbols defined by the compiler. These symbols may state the compiler name or family, version number, operating system, and word size. Depending on these symbols, the included files may change.
E.g. a call to a log() function may induce a transitive dependency to a library that manages the I/O of writing a message to a log file. Dependencies and transitive dependencies can be resolved at different times, depending on how the computer program is assembled and/or executed: e.g. a compiler can have a link phase where the dependencies are ...
Historically, all library linking was static, but today dynamic linking is an alternative and entails inherent trade-offs.. An advantage of static over dynamic is that the application is guaranteed to have the library routines it requires available at run-time, as the code to those routines is embedded in the executable file.
Dependency Walker or depends.exe is a free program for Microsoft Windows used to list the imported and exported functions of a portable executable file. It also displays a recursive tree of all the dependencies of the executable file (all the files it requires to run).