pragma ident
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| WARNING: | Non-Standard Feature | This section includes information about a non-standard language extension |
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#pragma ident is a non-standard pragma, supported by most Unix compilers, which adds an identification string to the compiled object. #pragma ident is typically used to include version information for source files (e.g. a version control identifier).
When combined with @(#), these strings can be extracted from an object or executable with the what command.
Example:
#pragma ident "%W% %E% %U%" /* typical SCCS id string; %W% expands to @(#) followed by filename */
Some operating systems (such as 4BSD-derived Unixes) support the __RCSID macro, defined in <sys/cdefs.h>, with a similar purpose (typically implemented as a static const char*).
Compilers supporting #pragma ident:
