NAME
elf_version —
retrieve or set ELF library operating
version
LIBRARY
library “libelf”
SYNOPSIS
#include
<libelf.h>
unsigned int
elf_version(unsigned
int version);
DESCRIPTION
The
elf_version()
function is used to query the current operating version of the ELF library,
and to inform the ELF library about the application's desired operating
version.
If the argument version
is EV_NONE, the
elf_version()
function returns the currently configured operating version for the ELF
library.
If the argument version
is not EV_NONE, and if argument
version is supported by the ELF library, function
elf_version()
sets the library's operating version to version, and
returns the previous value of the operating version. If argument
version cannot be supported, then the
elf_version() function returns
EV_NONE.
RETURN VALUES
The elf_version() function returns the
currently configured ELF library version, or EV_NONE
if an unsupported version is requested.
EXAMPLES
An application program would inform the ELF library about its desired operating version and check for an error using the following code snippet:
if (elf_version(EV_CURRENT) == EV_NONE) err(EXIT_FAILURE, "ELF library too old");
ERRORS
Function elf_version() may fail with the
following error:
- [
ELF_E_VERSION] - An unsupported library version number was requested.