dnl CHECK_APACHE([MINIMUM13-VERSION [, MINIMUM20-VERSION [, 
dnl            ACTION-IF-FOUND13 [, ACTION-IF-FOUND20 [, ACTION-IF-NOT-FOUND]]])
dnl Test for Apache apxs, APR, and APU

AC_DEFUN([CHECK_APACHE],
[dnl
AC_ARG_WITH(
    apxs,
    [AC_HELP_STRING([--with-apxs=PATH],[Path to apxs])],
    apxs_prefix="$withval",
    apxs_prefix="/usr"
    )

AC_ARG_ENABLE(
        apachetest,
        [AC_HELP_STRING([--disable-apxstest],[Do not try to compile and run apache version test program])],
        ,
        enable_apachetest=yes
    )

    if test -x $apxs_prefix -a ! -d $apxs_prefix; then
        APXS_BIN=$apxs_prefix
    else
        test_paths="$apxs_prefix:$apxs_prefix/bin:$apxs_prefix/sbin"
        test_paths="${test_paths}:/usr/bin:/usr/sbin"
        test_paths="${test_paths}:/usr/local/bin:/usr/local/sbin:/usr/local/apache2/bin"
        AC_PATH_PROG(APXS_BIN, apxs, no, [$test_paths])
    fi
    min_apache13_version=ifelse([$1], ,no,$1)
    min_apache20_version=ifelse([$2], ,no,$2)
    no_apxs=""
    if test "$APXS_BIN" = "no"; then
        AC_MSG_ERROR([*** The apxs binary installed by apache could not be found!])
        AC_MSG_ERROR([*** Use the --with-apxs option with the full path to apxs])
    else
        AP_INCLUDES="-I`$APXS_BIN -q INCLUDEDIR 2>/dev/null`"
        AP_INCLUDEDIR="`$APXS_BIN -q INCLUDEDIR 2>/dev/null`"

        AP_PREFIX="`$APXS_BIN -q prefix 2>/dev/null`"

        AP_BINDIR="`$APXS_BIN -q bindir 2>/dev/null`"
        AP_SBINDIR="`$APXS_BIN -q sbindir 2>/dev/null`"
        AP_SYSCONFDIR="`$APXS_BIN -q sysconfdir 2>/dev/null`"

        APXS_CFLAGS=""
        for flag in CFLAGS EXTRA_CFLAGS EXTRA_CPPFLAGS NOTEST_CFLAGS; do
            APXS_CFLAGS="$APXS_CFLAGS `$APXS_BIN -q $flag 2>/dev/null`"
        done

        AP_CPPFLAGS="$APXS_CPPFLAGS $AP_INCLUDES"
        AP_CFLAGS="$APXS_CFLAGS $AP_INCLUDES"

        AP_LIBEXECDIR=`$APXS_BIN -q LIBEXECDIR 2>/dev/null`

        if test "x$enable_apachetest" = "xyes" ; then
            if test "$min_apache20_version" != "no"; then
                APR_CONFIG="`$APXS_BIN -q APR_BINDIR 2>/dev/null`/apr-1-config"
                if test ! -x $APR_CONFIG; then
                    APR_CONFIG="`$APXS_BIN -q APR_BINDIR 2>/dev/null`/apr-config"
                fi
                APR_INCLUDES=`$APR_CONFIG --includes 2>/dev/null`
                APR_LDFLAGS=`$APR_CONFIG --link-ld 2>/dev/null`
                APR_LIBS=`$APR_CONFIG --libs 2>/dev/null`
                APR_LIBTOOL=`$APR_CONFIG --link-libtool 2>/dev/null`
                APR_CPPFLAGS=`$APR_CONFIG --cppflags 2>/dev/null`
                APR_CFLAGS=`$APR_CONFIG --cflags 2>/dev/null`
                APR_VERSION=`$APR_CONFIG --version 2>/dev/null`
                APU_CONFIG="`$APXS_BIN -q APU_BINDIR 2>/dev/null`/apu-1-config"
                if test ! -x $APU_CONFIG; then
                    APU_CONFIG="`$APXS_BIN -q APU_BINDIR 2>/dev/null`/apu-config"
                fi
                APU_INCLUDES=`$APU_CONFIG --includes 2>/dev/null`
                APU_LDFLAGS=`$APU_CONFIG --link-ld 2>/dev/null`
                APU_LIBS=`$APU_CONFIG --libs 2>/dev/null`
                APU_LIBTOOL=`$APU_CONFIG --link-libtool 2>/dev/null`
                APU_VERSION=`$APU_CONFIG --version 2>/dev/null`

                AC_MSG_CHECKING(for Apache 2.0 version >= $min_apache20_version)
                TEST_APACHE_VERSION(20,$min_apache20_version,
                    AC_MSG_RESULT(yes)
                    AC_DEFINE(WITH_APACHE20,1,[Define to 1 if we are compiling with Apache 2.0.x])
                    AP_VERSION="2.0"
                    APXS_EXTENSION=.la
		    if test -f `$APXS_BIN -q INCLUDEDIR`/mod_status.h; then
			AC_DEFINE(HAVE_MOD_STATUS_H,1,[Define to 1 if mod_status.h and the mod_Status hook are available])
		    fi
                    AP_CFLAGS="$AP_CFLAGS $APU_INCLUDES $APR_INCLUDES"
                    AP_CPPFLAGS="$AP_CPPFLAGS $APU_INCLUDES $APR_INCLUDES"
                    AP_DEFS="-DWITH_APACHE20"
                    ifelse([$4], , , $4),
                    AC_MSG_RESULT(no)
                    if test "x$min_apache13_version" = "xno"; then
                        ifelse([$5], , , $5)
                    fi
                )
            fi
            if test "$min_apache13_version" != "no" -a "x$AP_VERSION" = "x"; then
                APR_INCLUDES=""
                APR_VERSION=""
                APR_LDFLAGS=""
                APR_LIBS=""
                APR_LIBTOOL=""
                APR_CFLAGS=""
                APR_CPPFLAGS=""
                APU_INCLUDES=""
                APU_VERSION=""
                APU_LDFLAGS=""
                APU_LIBS=""
                APU_LIBTOOL=""
                AC_MSG_CHECKING(for Apache 1.3 version >= $min_apache13_version)
                TEST_APACHE_VERSION(13,$min_apache13_version,
                    AC_MSG_RESULT(yes)
                    AC_DEFINE(WITH_APACHE13,1,[Define to 1 if we are compiling with Apache 1.3.x])
                    AP_VERSION="1.3"
                    APXS_EXTENSION=.so
                    AP_CFLAGS="-g $AP_CFLAGS"
                    AP_DEFS="-DWITH_APACHE13"
                    ifelse([$3], , , $3),
                    AC_MSG_RESULT(no)
                    ifelse([$5], , , $5)
                )
            fi
        fi
        AC_CHECK_DECL([DEFAULT_EXP_LIBEXECDIR],,[AC_DEFINE_UNQUOTED([DEFAULT_EXP_LIBEXECDIR],["$AP_LIBEXECDIR"],[Default Module LibExec directory])])
        AC_SUBST(AP_DEFS)
        AC_SUBST(AP_PREFIX)
        AC_SUBST(AP_CFLAGS)
        AC_SUBST(AP_CPPFLAGS)
        AC_SUBST(AP_INCLUDES)
        AC_SUBST(AP_INCLUDEDIR)
        AC_SUBST(AP_LIBEXECDIR)
        AC_SUBST(AP_VERSION)
        AC_SUBST(AP_SYSCONFDIR)
        AC_SUBST(AP_BINDIR)
        AC_SUBST(AP_SBINDIR)
        AC_SUBST(APR_INCLUDES)
        AC_SUBST(APR_LDFLAGS)
        AC_SUBST(APR_LIBS)
        AC_SUBST(APR_LIBTOOL)
        AC_SUBST(APR_CPPFLAGS)
        AC_SUBST(APR_CFLAGS)
        AC_SUBST(APU_INCLUDES)
        AC_SUBST(APU_LDFLAGS)
        AC_SUBST(APU_LIBS)
        AC_SUBST(APU_LIBTOOL)
        AC_SUBST(APXS_EXTENSION)
        AC_SUBST(APXS_BIN)
        AC_SUBST(APXS_CFLAGS)
    fi
])