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[PATCH 3a/6] Installed-header hygiene (BZ#20366): struct ifreq.


net/if_ppp.h declares a couple of structures that require struct
ifreq, which is only declared by net/if.h under __USE_MISC, so they
too should be conditionally declared.

Comments in net/if_ppp.h say that it's imported from an external
source, but that last happened in 1996 so I think it's probably a dead
letter.

The Linux and Hurd versions of this file are identical, perhaps
they should be un-sysdep-ified.  (And there is no generic version!)

	* sysdeps/mach/hurd/net/if_ppp.h
	* sysdeps/unix/sysv/linux/net/if_ppp.h:
        Only define struct ifpppstatsreq and struct ifpppcstatsreq
        if __USE_MISC is defined.
---
 sysdeps/mach/hurd/net/if_ppp.h       | 3 +++
 sysdeps/unix/sysv/linux/net/if_ppp.h | 3 +++
 2 files changed, 6 insertions(+)

diff --git a/sysdeps/mach/hurd/net/if_ppp.h b/sysdeps/mach/hurd/net/if_ppp.h
index b210d7f..8ee620b 100644
--- a/sysdeps/mach/hurd/net/if_ppp.h
+++ b/sysdeps/mach/hurd/net/if_ppp.h
@@ -119,6 +119,8 @@ struct ppp_option_data {
 	int	  transmit;
 };
 
+/* 'struct ifreq' is only available from net/if.h under __USE_MISC.  */
+#ifdef __USE_MISC
 struct ifpppstatsreq {
   struct ifreq	   b;
   struct ppp_stats stats;			/* statistic information */
@@ -131,6 +133,7 @@ struct ifpppcstatsreq {
 
 #define ifr__name       b.ifr_ifrn.ifrn_name
 #define stats_ptr       b.ifr_ifru.ifru_data
+#endif
 
 /*
  * Ioctl definitions.
diff --git a/sysdeps/unix/sysv/linux/net/if_ppp.h b/sysdeps/unix/sysv/linux/net/if_ppp.h
index 9994982..31a20766 100644
--- a/sysdeps/unix/sysv/linux/net/if_ppp.h
+++ b/sysdeps/unix/sysv/linux/net/if_ppp.h
@@ -118,6 +118,8 @@ struct ppp_option_data {
 	int	 transmit;
 };
 
+/* 'struct ifreq' is only available from net/if.h under __USE_MISC.  */
+#ifdef __USE_MISC
 struct ifpppstatsreq {
   struct ifreq	   b;
   struct ppp_stats stats;			/* statistic information */
@@ -130,6 +132,7 @@ struct ifpppcstatsreq {
 
 #define ifr__name       b.ifr_ifrn.ifrn_name
 #define stats_ptr       b.ifr_ifru.ifru_data
+#endif
 
 /*
  * Ioctl definitions.
-- 
2.9.3


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