AC_INIT(configure.in)RTP_CFLAGS="-O2"RTP_TARGETS=dummymsgRTP_ARFLAGS=RTP_LDFLAGS=RTP_VXWORKS="// Not VxWorks version"RTP_FILIO="// Don't have <sys/filio.h>"RTP_ENDIAN="// Little endian system"RTP_SOCKLEN="// Last argument of getsockname is 'int'"RTP_MCAST="// No multicasting support"dnl ---------------------------------------------------------------------------dnl Check if we're going to build the VxWorks versiondnl At this point, the configuration for this platform is still left to thednl user by editing the Makefilednl ---------------------------------------------------------------------------AC_MSG_CHECKING(if target platform is VxWorks)if test "$target" = "vxworks" ; then	AC_MSG_RESULT(yes)	RTP_VXWORKS="#define RTP_VXWORKS"	RTP_ENDIAN="#define RTP_BIG_ENDIAN"	RTP_MCAST="//#define RTP_MULTICAST // uncomment this define if multicasting is supported"	RTP_ARFLAGS="qc"	RTP_LDFLAGS="-shared -soname"	RTP_TARGETS="sharedlib staticlib"	CXX="c++"		cat << EOFIMPORTANT NOTE FOR VXWORKS!  The configure script has now created a basic Makefile. However, it is most  likely that this makefile will not generate the libraries. Therefore, you  should edit the Makefile somewhat, to make it work for your specific  configuration.  Also, you probably want to take a look at the file 'rtpconfig_unix.h'.  You should verify that the system you want to compile the libraries for  is indeed big endian. Also, if multicasting is supported on that system,  you can uncomment the RTP_MULTICAST define.EOFelse    	AC_MSG_RESULT(no)dnl PROCESS OTHER PLATFORMS    	dnl ---------------------------------------------------------------------------dnl Some compiler checksdnl ---------------------------------------------------------------------------AC_PROG_CCAC_PROG_CXXAC_PROG_CC_C_Oif test "$ac_cv_prog_cc_c_o" = no ; then	AC_MSG_ERROR(Compiler must be able to handle flags -c and -o simultaneously)fidnl ---------------------------------------------------------------------------dnl Check if 'ld' exists and which syntax to usednl ---------------------------------------------------------------------------USE_LD=noAC_CHECK_PROGS(RTP_LD,ld,"notfound")if test "$RTP_LD" != notfound ; then	AC_MSG_CHECKING(arguments for ld)	echo "int main(void){return 0;}" > configtest.c	if eval $CC -c -o configtest.o configtest.c 2>/dev/null; then				dnl Check format gnu ld uses		if eval $RTP_LD -shared -soname conftest -o conftest.so configtest.o 2>/dev/null; then			RTP_LDFLAGS="-shared -soname"			USE_LD=yes				dnl Check solaris format		elif eval $RTP_LD -G -h conftest -o conftest.so configtest.o 2>/dev/null; then			RTP_LDFLAGS="-G -h"			USE_LD=yes		fi	fi			if test "$USE_LD" = yes ; then		AC_MSG_RESULT($RTP_LDFLAGS)	else		AC_MSG_RESULT(unknown)	fi			rm -rf configtest.o configtest.c conftest.so 2>/dev/nullfiif test "$USE_LD" = yes ; then	RTP_TARGETS="sharedlib"else	AC_MSG_WARN(Won't be able to generate shared library)fidnl ---------------------------------------------------------------------------dnl Check if 'ar' exists and which syntax to usednl ---------------------------------------------------------------------------USE_AR=noAC_CHECK_PROGS(RTP_AR,ar,"notfound")if test "$RTP_AR" != notfound ; then	AC_MSG_CHECKING(arguments for ar)	echo "int main(void){return 0;}" > configtest.c	if eval $CC -c -o configtest.o configtest.c 2>/dev/null; then				dnl Check format gnu ar uses		if eval $RTP_AR qc conftest.a configtest.o 2>/dev/null; then			RTP_ARFLAGS="qc"			USE_AR=yes				dnl Check solaris format		elif eval $RTP_AR -r -u -c conftest.a configtest.o 2>/dev/null; then			RTP_ARFLAGS="-r -u -c"			USE_AR=yes		fi	fi			if test "$USE_AR" = yes ; then		AC_MSG_RESULT($RTP_ARFLAGS)	else		AC_MSG_RESULT(unknown)	fi			rm -rf configtest.o configtest.c conftest.a 2>/dev/nullfiif test "$USE_AR" = yes ; then	if test "$RTP_TARGETS" != dummymsg ; then		RTP_TARGETS="$RTP_TARGETS staticlib"	else		RTP_TARGETS=staticlib	fielse	AC_MSG_WARN(Won't be able to generate static library)fidnl ---------------------------------------------------------------------------dnl Check if sys/filio.h exists (used on solaris)dnl ---------------------------------------------------------------------------AC_CHECK_HEADER(sys/filio.h,[RTP_FILIO="#define RTP_HAVE_SYS_FILIO"])dnl ---------------------------------------------------------------------------dnl Check if it's a big endian or little endian systemdnl Note that we must be careful when a cross-compiler is being used...dnl ---------------------------------------------------------------------------if test "$cross_compiling" = yes ; then	cat << EOFASSUMING TARGET IS BIG ENDIAN:  The script detected a cross-compiler on your system. This can mean that  there really is a cross-compiler installed, or that for some other reason,  a simple program could not be run. You should check the config.log file  to verify this.  Since we are assuming a cross-compiler, we won't be able to actually test  any program. More important, we cannot test if the system is big or little  endian.  For now, big endian is assumed. If this assumption should be wrong, you will  have to comment the appropriate line in 'rtpconfig_unix.h'EOF	RTP_ENDIAN="#define RTP_BIG_ENDIAN // comment this if the target is a little endian system"else	AC_C_BIGENDIAN	if test "$ac_cv_c_bigendian" = yes; then		RTP_ENDIAN="#define RTP_BIG_ENDIAN"	fifidnl ---------------------------------------------------------------------------dnl Check what the last argument for getsockname isdnl ---------------------------------------------------------------------------AC_MSG_CHECKING(last argument of getsockname)AC_TRY_COMPILE([	#include <sys/types.h>	#include <sys/socket.h>	int getsockname(int s, struct sockaddr *name,unsigned int *namelen);],[	],[	AC_MSG_RESULT(unsigned int)	RTP_SOCKLEN="#define RTP_SOCKLENTYPE_UINT"],	AC_MSG_RESULT("int"))dnl ---------------------------------------------------------------------------dnl Check if multicast options are knowndnl ---------------------------------------------------------------------------AC_MSG_CHECKING(if necessary options for multicasting are available)AC_TRY_COMPILE([	#include <sys/types.h>	#include <sys/socket.h>	#include <netinet/in.h>],[	int testval;	struct ip_mreq mreq;	testval = IP_MULTICAST_TTL;	testval = IP_ADD_MEMBERSHIP;	testval = IP_DROP_MEMBERSHIP;],[	AC_MSG_RESULT(yes)	RTP_MCAST="#define RTP_MULTICAST"],	AC_MSG_RESULT("no"))dnl END PROCESSING OTHER PLATFORMSfiAC_ARG_ENABLE(fpic,[  --enable-fpic           enable -fpic compiler switch],	      [	      RTP_CFLAGS="$RTP_CFLAGS -fpic"	      ])AC_ARG_ENABLE(fPIC,[  --enable-fPIC           enable -fPIC compiler switch],	      [	      RTP_CFLAGS="$RTP_CFLAGS -fPIC"	      ])		AC_SUBST(RTP_CFLAGS)AC_SUBST(RTP_ARFLAGS)AC_SUBST(RTP_LDFLAGS)AC_SUBST(RTP_TARGETS)AC_SUBST(RTP_VXWORKS)AC_SUBST(RTP_FILIO)AC_SUBST(RTP_ENDIAN)AC_SUBST(RTP_SOCKLEN)AC_SUBST(RTP_MCAST)AC_OUTPUT(Makefile rtpconfig_unix.h)