Re: c++/3287: usleep() undeclared

Re: c++/3287: usleep() undeclared

[aoliva]

Synopsis: usleep() undeclared

State-Changed-From-To: open->closed
State-Changed-By: aoliva
State-Changed-When: Wed Jun 20 15:05:36 2001
State-Changed-Why:
    The problem is that unistd.h doesn't always declare usleep(), and C++ requires every called function to have been previously declared.  It seems to me that to get the appropriate declaration, you have to use -D_POSIX_SOURCE or -D_XOPEN_SOURCE_EXTENDED.  g++ won't reject the code because of the lack of a declaration if you use -fpermissive.

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view&pr=3287&database=gcc

c++/3287: usleep() undeclared

[f.bettoni]

>Number:         3287
>Category:       c++
>Synopsis:       usleep() undeclared
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Wed Jun 20 04:16:01 PDT 2001
>Closed-Date:
>Last-Modified:
>Originator:     f.bettoni@saritel.it
>Release:        gcc3.0
>Organization:
>Environment:
Digital UNIX 4.0d
>Description:
The following code doesn't compile with g++ usleep.cc

#include <unistd.h>
int main (int ac, char **av)
{ usleep (10); }

usleep.cc: In function `int main(int, char**)':
usleep.cc:3: `usleep' undeclared (first use this function)
usleep.cc:5: (Each undeclared identifier is reported only once for each 

/usr/local/lib/gcc-lib/alpha-dec-osf4.0d/3.0/include/unistd.h  is used preprocessing and usleep() is not defined inside
>How-To-Repeat:

>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted: