fix all missing instances of __cplusplus checks/extern "C" in headers

patch by Arvid Picciani (aep)

include/alloca.h

 #ifndef	_ALLOCA_H
 #define	_ALLOCA_H
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #define	__NEED_size_t
 #include <bits/alltypes.h>
 
 void *alloca(size_t);
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif

include/arpa/inet.h

 #ifndef _ARPA_INET_H
 #define	_ARPA_INET_H
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #include <netinet/in.h>
 #include <inttypes.h>
 
@@ -30,4 +34,8 @@ int inet_aton (const char *, struct in_addr *); /* nonstandard but widely used *
 #define INET_ADDRSTRLEN  16
 #define INET6_ADDRSTRLEN 46
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif

include/ctype.h

 #ifndef	_CTYPE_H
 #define	_CTYPE_H
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 int   isalnum(int);
 int   isalpha(int);
 int   isblank(int);
@@ -53,4 +57,8 @@ int   toascii(int);
 
 #endif
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif

include/ftw.h

 #ifndef _FTW_H
 #define	_FTW_H
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /* Normally we do not nest header includes. However useless bloat
  * like ftw may be treated as a special case. Otherwise we would
  * have to deal with duplicating all the stat.h mess. */
@@ -28,4 +32,8 @@ struct FTW
 int ftw(const char *, int (*)(const char *, const struct stat *, int), int);
 int nftw(const char *, int (*)(const char *, const struct stat *, int, struct FTW *), int, int);
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif

include/math.h

 #ifndef _MATH_H
 #define _MATH_H
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #define __NEED___uint16_t
 #define __NEED___uint32_t
 #define __NEED___uint64_t
@@ -317,4 +321,8 @@ extern int signgam;
 double      scalb(double, double);
 #endif
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif

include/net/ethernet.h

 #ifndef __NET_ETHERNET_H
 #define __NET_ETHERNET_H 1
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #include <stdint.h>
 #include <sys/types.h>
 #include <netinet/if_ether.h>
@@ -44,4 +48,8 @@ struct ether_header {
 #define	ETHERMTU	ETH_DATA_LEN
 #define	ETHERMIN	(ETHER_MIN_LEN - ETHER_HDR_LEN - ETHER_CRC_LEN)
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif

include/net/if.h

 #ifndef _NET_IF_H
 #define _NET_IF_H
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #define IF_NAMESIZE 16
 
 struct if_nameindex
@@ -117,6 +121,8 @@ struct ifconf {
 
 #endif
 
-
+#ifdef __cplusplus
+}
+#endif
 
 #endif

include/net/route.h

 #ifndef _NET_ROUTE_H
 #define _NET_ROUTE_H
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #include <stdint.h>
 #include <sys/socket.h>
 #include <sys/types.h>
@@ -113,4 +117,8 @@ struct in6_rtmsg {
 
 #define RTMSG_AR_FAILED		0x51
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif

include/netinet/in.h

 #ifndef	_NETINET_IN_H
 #define	_NETINET_IN_H
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #define __NEED_in_addr_t
 #define __NEED_in_port_t
 #define __NEED_sa_family_t
@@ -300,4 +304,8 @@ struct ip6_mtuinfo
 
 #define IPV6_RTHDR_TYPE_0       0
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif

include/sys/mount.h

 #ifndef _SYS_MOUNT_H
 #define _SYS_MOUNT_H
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #include <sys/ioctl.h>
 
 #define BLKROSET   _IO(0x12, 93)
@@ -43,4 +47,8 @@ int mount(const char *, const char *, const char *, unsigned long, const void *)
 int umount(const char *);
 int umount2(const char *, int);
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif

include/sys/msg.h

 #ifndef _SYS_MSG_H
 #define _SYS_MSG_H
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #include <sys/ipc.h>
 
 #define __NEED_pid_t
@@ -33,4 +37,8 @@ int msgget (key_t, int);
 ssize_t msgrcv (int, void *, size_t, long, int);
 int msgsnd (int, const void *, size_t, int);
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif

include/sys/resource.h

 #ifndef	_SYS_RESOURCE_H
 #define	_SYS_RESOURCE_H
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #define __NEED_id_t
 #define __NEED_time_t
 #define __NEED_struct_timeval
@@ -76,4 +80,8 @@ int setpriority (int, id_t, int);
 #define RLIM_NLIMITS RLIMIT_NLIMITS
 
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif

include/sys/shm.h

 #ifndef _SYS_SHM_H
 #define _SYS_SHM_H
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #define __NEED_time_t
 #define __NEED_size_t
 #define __NEED_pid_t
@@ -43,4 +47,8 @@ int shmctl(int, int, struct shmid_ds *);
 int shmdt(const void *);
 int shmget(key_t, size_t, int);
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif

include/sys/statfs.h

 #ifndef	_SYS_STATFS_H
 #define	_SYS_STATFS_H
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #include <sys/statvfs.h>
 
 typedef struct {
@@ -12,4 +16,8 @@ typedef struct {
 int statfs (const char *, struct statfs *);
 int fstatfs (int, struct statfs *);
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif

include/sys/statvfs.h

 #ifndef	_SYS_STATVFS_H
 #define	_SYS_STATVFS_H
 
+#ifdef __cplusplus
+extern "C" {
+#endif
 
 #define __NEED_fsblkcnt_t
 #define __NEED_fsfilcnt_t
@@ -38,5 +41,8 @@ int fstatvfs (int, struct statvfs *);
 #define ST_NOATIME     1024
 #define ST_NODIRATIME  2048
 
+#ifdef __cplusplus
+}
+#endif
 
 #endif

include/sys/swap.h

 #ifndef _SYS_SWAP_H
 #define _SYS_SWAP_H
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
 #define	SWAP_FLAG_PREFER        0x8000
 #define	SWAP_FLAG_PRIO_MASK     0x7fff
 #define	SWAP_FLAG_PRIO_SHIFT    0
@@ -8,4 +13,8 @@
 int swapon (const char *, int);
 int swapoff (const char *);
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif

include/sys/sysctl.h

 #ifndef	_SYS_SYSCTL_H
 #define	_SYS_SYSCTL_H
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #define __NEED_size_t
 #include <bits/alltypes.h>
 
 int sysctl (int *, int, void *, size_t *, void *, size_t);
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif

include/sys/sysinfo.h

 #ifndef _SYS_SYSINFO_H
 #define _SYS_SYSINFO_H
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /* ?? */
 #define SI_LOAD_SHIFT 16
 
@@ -26,4 +30,8 @@ int get_nprocs (void);
 long long get_phys_pages (void);
 long long get_avphys_pages (void);
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif

include/sys/times.h

 #ifndef	_SYS_TIMES_H
 #define	_SYS_TIMES_H
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #define __NEED_clock_t
 #include <bits/alltypes.h>
 
@@ -14,4 +18,9 @@ struct tms
 
 clock_t times (struct tms *);
 
+#ifdef __cplusplus
+}
 #endif
+
+#endif
+

include/sys/uio.h

 #ifndef _SYS_UIO_H
 #define _SYS_UIO_H
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #define __NEED_size_t
 #define __NEED_ssize_t
 #define __NEED_struct_iovec
@@ -10,4 +14,8 @@
 ssize_t readv (int, const struct iovec *, int);
 ssize_t writev (int, const struct iovec *, int);
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif

include/sys/utsname.h

 #ifndef	_SYS_UTSNAME_H
 #define	_SYS_UTSNAME_H
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 struct utsname
 {
 	char sysname[65];
@@ -17,5 +21,8 @@ struct utsname
 
 int uname (struct utsname *);
 
+#ifdef __cplusplus
+}
+#endif
 
 #endif