I looked in the Include stdlib.h and I saw there such code:
I'm interested in; __wur.Code:extern int system (const char *__command) __wur;
I searched on the Internet and on includes but did not find anything, what is it?
I looked in the Include stdlib.h and I saw there such code:
I'm interested in; __wur.Code:extern int system (const char *__command) __wur;
I searched on the Internet and on includes but did not find anything, what is it?
Something internal to the compiler or library implementation.
If you really wish to know find a site that supports your compiler and ask there.
Or, at least post your compiler information in this thread and maybe someone will be able to answer the question.
Tim S.
"...a computer is a stupid machine with the ability to do incredibly smart things, while computer programmers are smart people with the ability to do incredibly stupid things. They are,in short, a perfect match.." Bill Bryson
My gcc: 4.9.2-10 gnueabihf
It tells the compiler to warn about an unused result.
__wur
re: __wur
From a Bug Report:
From the GNU Website:Unfortunately glibc marks fwrite --- but oddly not the other stdio
output functions --- with __wur (which expands to
__attribute__((__warn_unused_result__)) when optimization is enabled
and the _FORTIFY_SOURCE feature is in use).
The warn_unused_result attribute causes a warning to be emitted if a caller of the function with this attribute does not use its return value. This is useful for functions where not checking the result is either a security problem or always a bug, such as realloc.
