Don't compile getopt*.c if the system provides getopt_long().

# Conflicts:
#	configure.ac
#	src/Makefile.am
#	src/tincd.c

configure.ac

@@ -170,7 +170,7 @@ dnl Checks for header files.
 dnl We do this in multiple stages, because unlike Linux all the other operating systems really suck and don't include their own dependencies.
 
 AC_HEADER_STDC
-AC_CHECK_HEADERS([stdbool.h syslog.h sys/file.h sys/ioctl.h sys/mman.h sys/param.h sys/resource.h sys/socket.h sys/time.h sys/uio.h sys/un.h sys/wait.h netdb.h arpa/inet.h dirent.h])
+AC_CHECK_HEADERS([stdbool.h syslog.h sys/file.h sys/ioctl.h sys/mman.h sys/param.h sys/resource.h sys/socket.h sys/time.h sys/uio.h sys/un.h sys/wait.h netdb.h arpa/inet.h dirent.h getopt.h])
 AC_CHECK_HEADERS([net/if.h net/if_types.h linux/if_tun.h net/if_tun.h net/tun/if_tun.h net/if_tap.h net/tap/if_tap.h net/ethernet.h net/if_arp.h netinet/in_systm.h netinet/in.h netinet/in6.h time.h netpacket/packet.h],
   [], [], [#include "$srcdir/src/have.h"]
 )
@@ -202,6 +202,9 @@ AC_CHECK_FUNCS([asprintf daemon fchmod flock ftime fork get_current_dir_name get
   [], [], [#include "$srcdir/src/have.h"]
 )
 
+AC_CHECK_FUNC(getopt_long, [getopt=true; AC_DEFINE(HAVE_GETOPT_LONG, 1, [getopt_long()])], [getopt=false])
+AM_CONDITIONAL(GETOPT, test "$getopt" = true)
+
 dnl Support for SunOS
 
 AC_CHECK_FUNC(socket, [], [

src/Makefile.am

@@ -53,8 +53,6 @@ tincd_SOURCES = \
 	fake-gai-errnos.h \
 	fake-getaddrinfo.c fake-getaddrinfo.h \
 	fake-getnameinfo.c fake-getnameinfo.h \
-	getopt.c getopt.h \
-	getopt1.c \
 	graph.c graph.h \
 	hash.c hash.h \
 	have.h \
@@ -149,7 +147,22 @@ sptps_speed_SOURCES = \
 	$(chacha_poly1305_SOURCES)
 
 ## Conditionally compile device drivers
-	
+
+if !GETOPT
+tincd_SOURCES += \
+	getopt.c getopt.h \
+	getopt1.c
+tinc_SOURCES += \
+	getopt.c getopt.h \
+	getopt1.cendif
+sptps_test_SOURCES += \
+	getopt.c getopt.h \
+	getopt1.c
+sptps_keypair_SOURCES += \
+	getopt.c getopt.h \
+	getopt1.c
+endif
+
 if LINUX
 tincd_SOURCES += linux/device.c
 endif

src/have.h

@@ -210,6 +210,12 @@
 #include <linux/if_tun.h>
 #endif
 
+#ifdef HAVE_GETOPT_H
+#include <getopt.h>
+#else
+#include "getopt.h"
+#endif
+
 #ifdef STATUS
 #undef STATUS
 #endif

src/tincd.c

@@ -43,8 +43,6 @@
 #include <time.h>
 #endif
 
-#include <getopt.h>
-
 #include "conf.h"
 #include "control.h"
 #include "crypto.h"