UNIX FD passing is supported by Solaris, but additional compile flags are required

[Pavel Strashkin]

Hello,

I'm trying to compile dbus 1.4.0 under Solaris and it fails with an
error like this: "struct msghdr has no msg_controll member...".
The answer on this question is there:
http://stackoverflow.com/questions/1034587/how-does-xpg4-2-and-other-defines-work-on-solaris

Passing UNIX FD was introduced in X/Open CAE Specification, Issue 4,
Version 2 (XPG4v2) so you need to enable it at compile time.
I've added "-D_XOPEN_SOURCE=500" and everything compiles without any error.

Below the copy/paste from /usr/include/sys/socket.h:
==BEG==
328 #if defined(_XPG4_2) || defined(_KERNEL)
329         void            *msg_control;           /* ancillary data */
330         socklen_t       msg_controllen;         /* ancillary data
buffer len */
331         int             msg_flags;              /* flags on
received message */
332 #else
==END

Below the copy/paste of notes from /usr/include/sys/feature_tests.h
about _XOPEN_SOURCE:
==BEG==
216 /*
217  * Use of _XOPEN_SOURCE
218  *
219  * The following X/Open specifications are supported:
220  *
221  * X/Open Portability Guide, Issue 3 (XPG3)
222  * X/Open CAE Specification, Issue 4 (XPG4)
223  * X/Open CAE Specification, Issue 4, Version 2 (XPG4v2)
224  * X/Open CAE Specification, Issue 5 (XPG5)
225  * Open Group Technical Standard, Issue 6 (XPG6), also referred to as
226  *    IEEE Std. 1003.1-2001 and ISO/IEC 9945:2002.
227  *
228  * XPG4v2 is also referred to as UNIX 95 (SUS or SUSv1).
229  * XPG5 is also referred to as UNIX 98 or the Single Unix Specification,
230  *     Version 2 (SUSv2)
231  * XPG6 is the result of a merge of the X/Open and POSIX specifications
232  *     and as such is also referred to as IEEE Std. 1003.1-2001 in
233  *     addition to UNIX 03 and SUSv3.
234  *
235  * When writing a conforming X/Open application, as per the specification
236  * requirements, the appropriate feature test macros must be defined at
237  * compile time. These are as follows. For more info, see standards(5).
238  *
239  * Feature Test Macro                                Specification
240  * ------------------------------------------------  -------------
241  * _XOPEN_SOURCE                                         XPG3
242  * _XOPEN_SOURCE && _XOPEN_VERSION = 4                   XPG4
243  * _XOPEN_SOURCE && _XOPEN_SOURCE_EXTENDED = 1           XPG4v2
244  * _XOPEN_SOURCE = 500                                   XPG5
245  * _XOPEN_SOURCE = 600  (or POSIX_C_SOURCE=200112L)      XPG6
246  *
247  * In order to simplify the guards within the headers, the following
248  * implementation private test macros have been created. Applications
249  * must NOT use these private test macros as unexpected results will
250  * occur.
251  *
252  * Note that in general, the use of these private macros is cumulative.
253  * For example, the use of _XPG3 with no other restrictions on the X/Open
254  * namespace will make the symbols visible for XPG3 through XPG6
255  * compilation environments. The use of _XPG4_2 with no other X/Open
256  * namespace restrictions indicates that the symbols were introduced in
257  * XPG4v2 and are therefore visible for XPG4v2 through XPG6 compilation
258  * environments, but not for XPG3 or XPG4 compilation environments.
259  *
260  * _XPG3    X/Open Portability Guide, Issue 3 (XPG3)
261  * _XPG4    X/Open CAE Specification, Issue 4 (XPG4)
262  * _XPG4_2  X/Open CAE Specification, Issue 4, Version 2
(XPG4v2/UNIX 95/SUS)
263  * _XPG5    X/Open CAE Specification, Issue 5 (XPG5/UNIX 98/SUSv2)
264  * _XPG6    Open Group Technical Standard, Issue 6 (XPG6/UNIX 03/SUSv3)
265  */
266
267 /* X/Open Portability Guide, Issue 3 */
268 #if defined(_XOPEN_SOURCE) && (_XOPEN_SOURCE - 0 < 500) && \
269         (_XOPEN_VERSION - 0 < 4) && !defined(_XOPEN_SOURCE_EXTENDED)
270 #define _XPG3
271 /* X/Open CAE Specification, Issue 4 */
272 #elif   (defined(_XOPEN_SOURCE) && _XOPEN_VERSION - 0 == 4)
273 #define _XPG4
274 #define _XPG3
275 /* X/Open CAE Specification, Issue 4, Version 2 */
276 #elif (defined(_XOPEN_SOURCE) && _XOPEN_SOURCE_EXTENDED - 0 == 1)
277 #define _XPG4_2
278 #define _XPG4
279 #define _XPG3
280 /* X/Open CAE Specification, Issue 5 */
281 #elif   (_XOPEN_SOURCE - 0 == 500)
282 #define _XPG5
283 #define _XPG4_2
284 #define _XPG4
285 #define _XPG3
286 #undef  _POSIX_C_SOURCE
287 #define _POSIX_C_SOURCE                 199506L
288 /* Open Group Technical Standard , Issue 6 */
289 #elif   (_XOPEN_SOURCE - 0 == 600) || (_POSIX_C_SOURCE - 0 == 200112L)
290 #define _XPG6
291 #define _XPG5
292 #define _XPG4_2
293 #define _XPG4
294 #define _XPG3
295 #undef  _POSIX_C_SOURCE
296 #define _POSIX_C_SOURCE                 200112L
297 #undef  _XOPEN_SOURCE
298 #define _XOPEN_SOURCE                   600
299 #endif
==END==