elf_version man page on SmartOS

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       elf_version - coordinate ELF library and application versions

       cc [ flag ... ] file ... -lelf [ library ... ]
       #include <libelf.h>

       unsigned elf_version(unsigned ver);

       As  elf(3ELF)  explains,	 the  program, the library, and an object file
       have independent notions of the latest ELF version. elf_version()  lets
       a program query the ELF library's internal version. It further lets the
       program specify what memory types it uses by  giving  its  own  working
       version,	 ver,  to the library. Every program that uses the ELF library
       must coordinate versions as described below.

       The header <libelf.h> supplies the version  to  the  program  with  the
       macro  EV_CURRENT.  If the library's internal version (the highest ver‐
       sion known to the library) is lower than	 that  known  by  the  program
       itself, the library may lack semantic knowledge assumed by the program.
       Accordingly, elf_version() will not accept a working version unknown to
       the library.

       Passing	ver  equal  to	EV_NONE	 causes	 elf_version()	to  return the
       library's internal version, without altering the	 working  version.  If
       ver is a version known to the library, elf_version() returns the previ‐
       ous (or initial) working version number. Otherwise, the working version
       remains unchanged and elf_version() returns EV_NONE.

       Example 1 A sample display of using the elf_version() function.

       The  following excerpt from an application program protects itself from
       using an older library:

	 if (elf_version(EV_CURRENT) == EV_NONE) {
	      /* library out of date */
	      /* recover from error */

       See attributes(5) for descriptions of the following attributes:

       │Interface Stability │ Stable	      │
       │MT-Level	    │ MT-Safe	      │

       elf(3ELF),   elf32_xlatetof(3ELF),    elf_begin(3ELF),	 libelf(3LIB),

       The working version should be the same for all operations on a particu‐
       lar ELF descriptor.  Changing  the  version  between  operations	 on  a
       descriptor will probably not give the expected results.

				 Jul 11, 2001		     ELF_VERSION(3ELF)

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