1dlfcn.h(0P)                POSIX Programmer's Manual               dlfcn.h(0P)
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PROLOG

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

12       dlfcn.h — dynamic linking
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SYNOPSIS

15       #include <dlfcn.h>
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DESCRIPTION

18       The <dlfcn.h> header shall define at least the following symbolic  con‐
19       stants for use in the construction of a dlopen() mode argument:
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21       RTLD_LAZY     Relocations  are  performed  at an implementation-defined
22                     time.
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24       RTLD_NOW      Relocations are performed when the object is loaded.
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26       RTLD_GLOBAL   All symbols are available for  relocation  processing  of
27                     other modules.
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29       RTLD_LOCAL    All  symbols  are  not made available for relocation pro‐
30                     cessing by other modules.
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32       The following shall be declared as functions and may also be defined as
33       macros. Function prototypes shall be provided.
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36           int    dlclose(void *);
37           char  *dlerror(void);
38           void  *dlopen(const char *, int);
39           void  *dlsym(void *restrict, const char *restrict);
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41       The following sections are informative.
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APPLICATION USAGE

44       None.
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RATIONALE

47       None.
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FUTURE DIRECTIONS

50       None.
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SEE ALSO

53       The  System  Interfaces  volume  of POSIX.1‐2017, dlclose(), dlerror(),
54       dlopen(), dlsym()
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57       Portions of this text are reprinted and reproduced in  electronic  form
58       from  IEEE Std 1003.1-2017, Standard for Information Technology -- Por‐
59       table Operating System Interface (POSIX), The Open Group Base  Specifi‐
60       cations  Issue  7, 2018 Edition, Copyright (C) 2018 by the Institute of
61       Electrical and Electronics Engineers, Inc and The Open Group.   In  the
62       event of any discrepancy between this version and the original IEEE and
63       The Open Group Standard, the original IEEE and The Open Group  Standard
64       is  the  referee document. The original Standard can be obtained online
65       at http://www.opengroup.org/unix/online.html .
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67       Any typographical or formatting errors that appear  in  this  page  are
68       most likely to have been introduced during the conversion of the source
69       files to man page format. To report such errors,  see  https://www.ker‐
70       nel.org/doc/man-pages/reporting_bugs.html .
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74IEEE/The Open Group                  2017                          dlfcn.h(0P)
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