run-time library - определение. Что такое run-time library
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Что (кто) такое run-time library - определение

SET OF ROUTINES THAT CAN BE INVOKED BY A COMPILED SOFTWARE BINARY DURING ITS EXECUTION
Run-time library

run-time library         
<operating system, programming, library> A file containing routines which are linked with a program at run time rather than at compile-time. The advantage of such {dynamic linking} is that only one copy of the library needs to be stored, rather than a copy being included with each executable that refers to it. This can greatly reduce the disk space occupied by programs. Furthermore, it means that all programs immediately benefit from changes (e.g. bug fixes) to the single copy of the library without requiring recompilation. Since the library code is normally classified as read-only to the memory management system, it is possible for a single copy of the library to be loaded into memory and shared by all active programs, thus reducing RAM and virtual memory requirements and program load time. (1997-07-16)
Runtime library         
In computer programming, a runtime library is a set of low-level routines used by a compiler to invoke some of the behaviors of a runtime environment, by inserting calls to the runtime library into compiled executable binary. The runtime environment implements the execution model, built-in functions, and other fundamental behaviors of a programming language.
Runtime (program lifecycle phase)         
PROGRAM LIFECYCLE PHASE, TIME DURING WHICH A PROGRAM IS RUNNING (EXECUTING)
Execution time; Runtime performance; Runtime error; Run-time error; Runtime errors; Run time error; At runtime; Run-time behaviour; Integer divide by zero; Runtime (computing); Run time (program lifecycle phase); Running (computing)
In computer science, runtime, run time, or execution time is the final phase of a computer programs life cycle, in which the code is being executed on the computer's central processing unit (CPU) as machine code. In other words, "runtime" is the running phase of a program.

Википедия

Runtime library

In computer programming, a runtime library is a set of low-level routines used by a compiler to invoke some of the behaviors of a runtime environment, by inserting calls to the runtime library into compiled executable binary. The runtime environment implements the execution model, built-in functions, and other fundamental behaviors of a programming language. During execution (run time) of that computer program, execution of those calls to the runtime library cause communication between the executable binary and the runtime environment. A runtime library often includes built-in functions for memory management or exception handling. Therefore, a runtime library is always specific to the platform and compiler.

The runtime library may implement a portion of the runtime environment's behavior, but if one reads the code of the calls available, they are typically only thin wrappers that simply package information, and send it to the runtime environment or operating system. However, sometimes the term runtime library is meant to include the code of the runtime environment itself, even though much of that code cannot be directly reached via a library call.

For example, some language features that can be performed only (or are more efficient or accurate) at runtime are implemented in the runtime environment and may be invoked via the runtime library API, e.g. some logic errors, array bounds checking, dynamic type checking, exception handling, and possibly debugging functionality. For this reason, some programming bugs are not discovered until the program is tested in a "live" environment with real data, despite sophisticated compile-time checking and testing performed during development.

As another example, a runtime library may contain code of built-in low-level operations too complicated for their inlining during compilation, such as implementations of arithmetic operations not directly supported by the targeted CPU, or various miscellaneous compiler-specific operations and directives.

The concept of a runtime library should not be confused with an ordinary program library like that created by an application programmer or delivered by a third party, nor with a dynamic library, meaning a program library linked at run time. For example, the C programming language requires only a minimal runtime library (commonly called crt0), but defines a large standard library (called C standard library) that has to be provided by each implementation.