dlfcn.h(3)                 POSIX Programmer's Manual                dlfcn.h(3)



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

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 .



IEEE/The Open Group                  2017                           dlfcn.h(3)
