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AC_INIT()
AM_INIT_AUTOMAKE(tinyproxy,1.3.1e)
AM_CONFIG_HEADER(src/defines.h)

dnl Grab any initial CFLAGS and LIBS so we can pick better defaults
iCFLAGS="$CFLAGS"
iLIBS="$LIBS"

dnl Checks for programs.
AC_PROG_CC
AC_PROG_INSTALL

dnl Checks for header files.
AC_HEADER_STDC
AC_CHECK_HEADERS(fcntl.h sys/time.h syslog.h unistd.h)

dnl Checks for typedefs, structures, and compiler characteristics.
AC_C_CONST
AC_TYPE_SIZE_T
AC_HEADER_TIME
AC_C_INLINE

dnl chris - allow user to choose log file location, port and username
AC_ARG_WITH(log-file, \
  [--with-log-file=FILE    Default logfile name], \
	[AC_DEFINE_UNQUOTED(DEFAULT_LOG, "$withval" )])

AC_ARG_WITH(port, \
  [--with-port=PORT        Default server port], \
	[AC_DEFINE_UNQUOTED(DEFAULT_PORT, $withval)])       

AC_ARG_WITH(user, \
  [--with-user=USER        Default user to switch to on startup], \
	[AC_DEFINE_UNQUOTED(DEFAULT_USER, "$withval")])

dnl enable arguments for adns lib/include
dnl there must be a nicer way to do this, but I sure don't know what it is
AC_ARG_WITH(adns-include, \
  [--with-adns-include=DIR Directory containing adns.h], \
	[ADNS_INCLUDE=$withval ; CFLAGS="$CFLAGS -I$withval"])
AC_ARG_WITH(adns-lib, \
  [--with-adns-lib=DIR     Directory containing libadns.so], \
	[CFLAGS="$CFLAGS -L$withval"])

dnl check that adns is installed
AC_CHECK_HEADER(adns.h, [], \
	AC_CHECK_HEADER($ADNS_INCLUDE/adns.h, [], \
		[AC_MSG_ERROR(You must have ADNS installed)]))
AC_CHECK_LIB(adns, adns_init, [LIBS="$LIBS -ladns"],\
	[AC_MSG_ERROR(You must have ADNS installed)])

dnl Checks for library functions.
AC_TYPE_SIGNAL
AC_FUNC_STRFTIME
AC_FUNC_VPRINTF
AC_CHECK_FUNCS(socket select strerror strdup vsyslog vsnprintf)

dnl Add the warnings if we have the GCC compiler
rm -f conftest*

case "$GCC" in
 yes)
   CFLAGS="$CFLAGS -Wall"
   CFLAGS="$CFLAGS -Wshadow"
   CFLAGS="$CFLAGS -Wcast-qual"
   CFLAGS="$CFLAGS -Wcast-align"
   CFLAGS="$CFLAGS -Wstrict-prototypes"
   CFLAGS="$CFLAGS -Wmissing-prototypes"
   CFLAGS="$CFLAGS -Wmissing-declarations"
   CFLAGS="$CFLAGS -Wredundant-decls"
dnl   CFLAGS="$CFLAGS -Wpointer-arith"
   CFLAGS="$CFLAGS -Waggregate-return"
   CFLAGS="$CFLAGS -Wnested-externs"

   AC_CACHE_CHECK(whether ${CC-cc} -pipe works, ac_cv_prog_cc_pipe,
   [echo 'void f(){}' > conftest.c
   if test -z "`${CC-cc} -pipe -c conftest.c 2>&1`" -a -s conftest.o; then
     ac_cv_prog_cc_pipe=yes
   else
     ac_cv_prog_cc_pipe=no
   fi
   rm -f conftest*
   ])

   case "$ac_cv_prog_cc_pipe" in
    yes)
      CFLAGS="$CFLAGS -pipe"
      ;;
   esac
   ;;
esac

AC_CHECK_LIB(nsl, gethostname, [LIBS="$LIBS -lnsl"])
AC_CHECK_LIB(socket, setsockopt, [LIBS="$LIBS -lsocket"])

dnl Check to see if the debuging code is turned on
AC_MSG_CHECKING(Include debugging code)
AC_ARG_ENABLE(debug, \
  [--enable-debug          turn on additional debugging code],
  [debug_enabled=yes], [debug_enabled=no])
if test "$debug_enabled" = "no"; then
  CFLAGS="$CFLAGS -DNDEBUG"
fi
AC_MSG_RESULT($debug_enabled)

AC_MSG_CHECKING(Include support for SOCKS)
AC_ARG_ENABLE(socks, \
  [--enable-socks          enable SOCKS support],
  [socks_enabled=yes], [socks_enabled=no])
if test "$socks_enabled" = "$yes"; then
  AC_CHECK_HEADER(socks.h, [socks_header="yes"], [socks_header="no"])
  AC_CHECK_LIB(socks, main, [socks_library="yes"], [socks_library="no"])
  if test "$socks_header" = "yes" && test "$socks_library" = "yes"; then
    CFLAGS="$CFLAGS -I/usr/include/sock.h -DSOCKS"
    LIBS="$LIBS -lsocks"
  else
    socks_enabled=no
  fi
fi
AC_MSG_RESULT($socks_enabled)

AC_MSG_CHECKING(Include the XTinyproxy header code)
AC_ARG_ENABLE(xtinyproxy, \
  [--enable-xtinyproxy     enable the use of the XTinyproxy header],
  [xtinyproxy_enabled=yes], [xtinyproxy_enabled=no])
if test "$xtinyproxy_enabled" = "yes"; then
  AC_DEFINE(XTINYPROXY)
fi
AC_MSG_RESULT($xtinyproxy_enabled)

AC_MSG_CHECKING(Include filtering of domain/URL)
AC_ARG_ENABLE(filter, \
  [--enable-filter         enable filtering of domains/URLs],
  [filter_enabled=yes], [filter_enabled=no])
if test "$filter_enabled" = "yes"; then
  LIBOBJS="$LIBOBJS filter.o"
  AC_DEFINE(FILTER_ENABLE)
fi
AC_MSG_RESULT($filter_enabled)

dnl Check for the regex library
AC_ARG_WITH(regex, \
  [--with-regex            Use the GNU regex libary ],
  [tinyproxy_cv_regex=yes],
  [AC_CHECK_FUNCS(regcomp, tinyproxy_cv_regex=no, tinyproxy_cv_regex=yes)])

if test $tinyproxy_cv_regex = no ; then
  AC_MSG_CHECKING(whether your system's regexp library is completely broken)
  AC_TRY_RUN([
#include <unistd.h>
#include <regex.h>
main() { regex_t blah ; return regcomp(&blah, "foo.*bar", REG_NOSUB) || regexec(&blah, "foobar", 0, NULL, 0); }],
  tinyproxy_cv_regex_broken=no, tinyproxy_cv_regex_broken=yes, tinyproxy_cv_regex_broken=yes)

  AC_MSG_RESULT([$tinyproxy_cv_regex_broken])
  if test $tinyproxy_cv_regex_broken = yes ; then
    echo "Using the included GNU regex instead." >&AC_FD_MSG
    tinyproxy_cv_regex = yes
  fi
fi

if test $tinyproxy_cv_regex = yes ; then
  AC_DEFINE(USE_GNU_REGEX)
  LIBOBJS="$LIBOBJS gnuregex.o"
fi

AC_SUBST(CFLAGS)dnl
AC_SUBST(LIBS)dnl
AC_SUBST(LIBOBJS)dnl

AC_OUTPUT(Makefile src/Makefile doc/Makefile)