PROLOG

       This  manual  page  is part of the POSIX Programmer's Manual.  The Linux implementation of this interface
       may differ (consult the corresponding Linux manual page for details of Linux behavior), or the  interface
       may not be implemented on Linux.

NAME

       dlfcn.h — dynamic linking

SYNOPSIS

       #include <dlfcn.h>

DESCRIPTION

       The  <dlfcn.h>  header shall define at least the following symbolic constants for use in the construction
       of a dlopen() mode argument:

       RTLD_LAZY     Relocations are performed at an implementation-defined time.

       RTLD_NOW      Relocations are performed when the object is loaded.

       RTLD_GLOBAL   All symbols are available for relocation processing of other modules.

       RTLD_LOCAL    All symbols are not made available for relocation processing by other modules.

       The following shall be declared as functions and may also be defined as macros. Function prototypes shall
       be provided.

           int    dlclose(void *);
           char  *dlerror(void);
           void  *dlopen(const char *, int);
           void  *dlsym(void *restrict, const char *restrict);

       The following sections are informative.

APPLICATION USAGE

       None.

RATIONALE

       None.

FUTURE DIRECTIONS

       None.

SEE ALSO

       The System Interfaces volume of POSIX.1‐2017, dlclose(), dlerror(), dlopen(), dlsym()

COPYRIGHT

       Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1-2017, Standard
       for Information  Technology  --  Portable  Operating  System  Interface  (POSIX),  The  Open  Group  Base
       Specifications  Issue  7, 2018 Edition, Copyright (C) 2018 by the Institute of Electrical and Electronics
       Engineers, Inc and The Open Group.  In the event of any discrepancy between this version and the original
       IEEE  and The Open Group Standard, the original IEEE and The Open Group Standard is the referee document.
       The original Standard can be obtained online at http://www.opengroup.org/unix/online.html .

       Any typographical or formatting errors that appear in this page are most likely to have  been  introduced
       during   the   conversion  of  the  source  files  to  man  page  format.  To  report  such  errors,  see
       https://www.kernel.org/doc/man-pages/reporting_bugs.html .