configure.in

dnl $Id: configure.in,v 1.22 2004/02/13 06:14:01 marius Exp $
AC_INIT(trickle.c)

AC_CANONICAL_SYSTEM
dnl AC_LIBTOOL_DLOPEN

AM_INIT_AUTOMAKE(trickle, 1.07)
AM_CONFIG_HEADER(config.h)

AC_PROG_CC

AM_PROG_LIBTOOL
AC_PROG_MAKE_SET

dnl intitialization
if test "x$prefix" = "xNONE"; then
    prefix="/usr/local"
fi

dnl Checks for programs.

AC_PROG_RANLIB
AC_PROG_INSTALL

dnl Platform specific stuff
case "$host" in
*-*-hpux*)
    AC_DEFINE(SPT_TYPE,SPT_PSTAT)
    LIBS="$LIBS -lxnet -lsec"
    ;;
esac

dnl Checks for standard libraries.
AC_CHECK_LIB(socket, socket)
AC_CHECK_LIB(nsl, gethostbyname)
AC_CHECK_LIB(dl, dlopen, [ LIBDL="-ldl" 
			   LIBS="$LIBS -ldl" ],,)
AC_SUBST(LIBDL)
dnl ugly ugly hack	
AC_CHECK_LIB(c, err, [ ERRO="" ], [ ERRO="err.o" ],)
AC_SUBST(ERRO)

dnl Checks for header files.
AC_HEADER_STDC
AC_HEADER_SYS_WAIT

dnl Check for __progname; from OpenSSHp
AC_CACHE_CHECK([if libc defines __progname], ac_cv_libc_defines___progname, [   
        AC_TRY_LINK([],
                [ extern char *__progname; printf("%s", __progname); ],
                [ ac_cv_libc_defines___progname="yes" ],
                [ ac_cv_libc_defines___progname="no" ]
        )
])
if test "x$ac_cv_libc_defines___progname" = "xyes" ; then
   AC_DEFINE(HAVE___PROGNAME)
fi

AC_CHECK_HEADERS(sys/ioctl.h sys/time.h err.h time.h unistd.h stdint.h netinet/in.h asm/poll.h)

dnl Checks for typedefs, structures, and compiler characteristics.
AC_C_CONST
AC_TYPE_PID_T
AC_TYPE_SIZE_T
AC_HEADER_TIME
AC_CHECK_TYPE(u_int64_t, unsigned long long)
AC_CHECK_TYPE(u_int32_t, unsigned int)
AC_CHECK_TYPE(u_int16_t, unsigned short)
AC_CHECK_TYPE(u_int8_t, unsigned char)
AC_CHECK_TYPE(in_addr_t, unsigned long)

dnl Checks for library functions.
AC_PROG_GCC_TRADITIONAL
AC_TYPE_SIGNAL
AC_CHECK_FUNCS(socket)
AC_REPLACE_FUNCS(strlcat strlcpy daemon setenv strsep)

dnl XXX
AC_CHECK_FUNCS(sendfile)

dnl Checks for libevent
AC_MSG_CHECKING(for libevent)
AC_ARG_WITH(libevent,
[  --with-libevent=DIR     use libevent in DIR],
[ case "$withval" in
  yes|no)
     AC_MSG_RESULT(no)
     ;;
  *)
     AC_MSG_RESULT($withval)
     if test -f $withval/include/event.h -a -f $withval/lib/libevent.a; then
        owd=`pwd`
        if cd $withval; then withval=`pwd`; cd $owd; fi
        EVENTINC="-I$withval/include"
        EVENTLIB="-L$withval/lib -levent"
     elif test -f $withval/event.h -a -f $withval/libevent.a; then
        owd=`pwd`
        if cd $withval; then withval=`pwd`; cd $owd; fi
        EVENTINC="-I$withval"
        EVENTLIB="-L$withval -levent"
     else
        AC_ERROR(event.h or libevent.a not found in $withval)
     fi
     ;;
  esac ],
[ if test -f ${prefix}/include/event.h -a -f ${prefix}/lib/libevent.a;
then
     EVENTINC="-I${prefix}/include"
     EVENTLIB="-L${prefix}/lib -levent"
  elif test -f /usr/include/event.h; then
     EVENTLIB="-levent"
  else
     AC_MSG_RESULT(no)
     AC_ERROR(libevent not found)
  fi
  AC_MSG_RESULT(yes) ]
)
AC_SUBST(EVENTINC)
AC_SUBST(EVENTLIB)

dnl check if underscores are needed
AC_MSG_CHECKING(if underscores are needed for symbols)
AC_TRY_RUN(
#include <dlfcn.h>
#include <stdio.h>

int underscoreprobe(void) { return (31415); }

int
main(int argc, char **argv)
{
	void *dh;

	if ((dh = dlopen(NULL, 0)) == NULL)
		exit(1);

	if (dlsym(dh, "_underscoreprobe") != NULL)
		exit(0);

	exit(1);	
}, [AC_MSG_RESULT(yes)
   AC_DEFINE(DL_NEED_UNDERSCORE)], AC_MSG_RESULT(no), AC_MSG_RESULT(no))

HAVEMETHOD=no

AC_MSG_CHECKING(if we can access libc without dlopen)
AC_TRY_RUN(
#include <dlfcn.h>
#include <stdio.h>

int
main(int argc, char **argv)
{
	void *dh;

	dh = (void *)-1L;

	if (dlsym(dh, "printf") != NULL || dlsym(dh, "_printf") != NULL)
		exit(0);

	exit(1);
}, [AC_MSG_RESULT(yes)
    AC_DEFINE(NODLOPEN)
    HAVEMETHOD=yes], AC_MSG_RESULT(no), AC_MSG_RESULT(no))

if test "$HAVEMETHOD" = "no"; then
    dnl ugly, ugly hack		     
    LIBCGUESS=`echo /lib/libc.so.*`
    USRLIBCGUESS=`echo /usr/lib/libc.so*`
    
    if test "$USRLIBCGUESS" = "/usr/lib/libc.so.*"; then
       USRLIBCGUESS=""
    fi
    
    if test "$LIBCGUESS" = "/lib/libc.so.*"; then
       LIBCGUESS=""
    fi
    
    for TESTLIB in libc.so `echo $USRLIBCGUESS` `echo $LIBCGUESS`
    do
        AC_MSG_CHECKING(if we can access libc with $TESTLIB)
        AC_TRY_RUN(
        #include <dlfcn.h>
        #include <stdio.h>
    
        int
        main(int argc, char **argv)
        {
    	    void *dh;
    
    	    if (dlopen("$TESTLIB", RTLD_LAZY) != NULL)
    	           exit(0);
    
            exit(1);
        }, [AC_MSG_RESULT(yes)
            AC_DEFINE_UNQUOTED(DLOPENLIBC, "$TESTLIB")
	    HAVEMETHOD=yes], AC_MSG_RESULT(no), AC_MSG_RESULT(no))

	if test "$HAVEMETHOD" = "yes"; then
	   break
	fi
    done
fi

if test "$HAVEMETHOD" = "no"; then
   AC_MSG_ERROR(Couldn't figure out how to access libc)
fi

if test "x$sysconfdir" = "x$prefix/etc"; then
    csysconfdir="$prefix/etc"
else
    csysconfdir="$sysconfdir"
fi

clibdir="$prefix/lib/trickle"

AC_DEFINE_UNQUOTED(SYSCONFDIR, "$csysconfdir")
AC_DEFINE_UNQUOTED(LIBDIR, "$clibdir")

havesendfile=no
AC_CHECK_FUNCS(sendfile, [havesendfile=yes], )
if test "$havesendfile" = "yes"; then
   AC_DEFINE(HAVE_SENDFILE, 1, [Define if your system has the sendfile system call])
fi

dnl according to http://www.gnu.org/software/autoconf/manual/autoconf-2.57/html_node/autoconf_165.html
dnl this is no longer needed.

dnl This is necessary so that .o files in LIBOBJS are also built via
dnl the ANSI2KNR-filtering rules.
LL=`echo "$AC_LIBOBJ" | sed 's/\.o /\$U.o /g;s/\.o$/\$U.o/'`
LTLIBOBJS=`echo "$LL" | sed 's/\.o/\.lo/g'`
AC_SUBST(LTLIBOBJS)

AC_OUTPUT(Makefile)