| Title: | C++ |
| Notice: | Read 1.* and use keywords (e.g. SHOW KEY/FULL KIT_CXX_VAX_VMS) |
| Moderator: | DECCXX::AMARTIN |
| Created: | Fri Nov 06 1987 |
| Last Modified: | Thu Jun 05 1997 |
| Last Successful Update: | Fri Jun 06 1997 |
| Number of topics: | 3604 |
| Total number of notes: | 18242 |
Hi people:
I have a problem with a customer compiling a progran with the function usleep.
If the customer compiles with C no problem,but this file is compiled with
cxx gives the following error:
usleep is not declared.
Operating System is 3.2F.
File contains the following:
#include <unistd.h>
main()
{
usleep(1000);
}
command compiler is :cxx -o output file input file.c
I have tested with Digital UNix 4.0b .Ok
Any idea?
Francesc
| T.R | Title | User | Personal Name | Date | Lines |
|---|---|---|---|---|---|
| 3454.1 | Workaround (-D_XOPEN_SOURCE_EXTENDED) ? | DECC::SULLIVAN | Jeff Sullivan | Tue Feb 18 1997 15:17 | 19 |
I took a look at /usr/include/unistd.h. Your program will work with C++ if you define _XOPEN_SOURCE_EXTENDED (or _XOPEN_SOURCE for a slightly different interface). The following is a test on Digital UNIX V4.0 with DEC C++ V5.5: % cxx t.cxx cxx: Error: t.cxx, line 5: In this statement, "usleep" is not declared. usleep(1000); ^ % cxx -D_XOPEN_SOURCE_EXTENDED t.cxx The fact that it doesn't work "out of the box" makes me think that it's a problem in the unistd.h header file. You might consider filing an OSF_QAR to get this resolved in the header file. If you're not sure how to do that, feel free to contact me offline (well, "online" technically...). -Jeff | |||||
| 3454.2 | works | BARNA::DSMAIL | Thu Feb 27 1997 14:26 | 7 | |
Hi jeff:
Thanks.It works
Francesc
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