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zpaq extract backup.zpaq path will only extract the specified directory (or file). Appending the -until N option selects the version, where negative numbers are allowed. -2 would extract the third most recent version of the archive.
cscope is used in two phases. First, a developer builds the cscope database of the source code. The developer can often use find or other Unix tools to get the list of filenames needed to index into a file called cscope.files. The developer then builds a database using the command cscope -b -q -k.
The compiler may start the compiled code at an arbitrary location, often location 1 as shown. Location 13 contains the machine code for the jump instruction to statement ST in location 5. (C) If SUBR is later linked with other code it may be stored at a location other than 1. In this example the linker places it at location 120.
Generating position-independent code is often the default behavior for compilers, but they may place restrictions on the use of some language features, such as disallowing use of absolute addresses (position-independent code has to use relative addressing). Instructions that refer directly to specific memory addresses sometimes execute faster ...
For these reasons, for C++ code to call a C function foo(), the C++ code must prototype foo() with extern "C". Likewise, for C code to call a C++ function bar(), the C++ code for bar() must be declared with extern "C". A common practice for header files to maintain both C and C++ compatibility is to make its declaration be extern "C" for the ...
But the preprocessor includes a file regardless of the extension. In fact, sometimes code includes .c or .cpp files. To prevent including the same file multiple times which often leads to a compiler error, a header file typically contains an include guard or if supported by the preprocessor #pragma once to prevent multiple inclusion.
Norcroft C was developed by Codemist, established in November 1987 [2] by a group of academics from the University of Cambridge and University of Bath; [3] [4] Arthur Norman, Alan Mycroft and John Fitch. Development took place from at least 1985; [5] [6] the company was dissolved in May 2016. [2] The name Norcroft is derived from the original ...
Grammar files describe a syntax of a generated compiler's target programming language and actions that should be taken against its specific constructs. Source code for a parser of the programming language is returned as the parser generator's output. This source code can then be compiled into a parser, which may be either standalone or embedded.