dnl $Id: configure.in,v 1.35 2001/11/21 19:35:51 rjkaes Exp $

dnl Devlopers, please strive to achieve this order:
dnl
dnl 0. Initialization and options processing
dnl 1. Programs
dnl 2. Libraries
dnl 3. Header files
dnl 4. Types
dnl 5. Structures
dnl 6. Compiler characteristics
dnl 7. Functions, global variables
dnl 8. System services
dnl
dnl Read the Autoconf manual for details.

AC_INIT()

AC_CANONICAL_SYSTEM
AC_DEFINE_UNQUOTED(TARGET_SYSTEM, "$target")

AM_INIT_AUTOMAKE(tinyproxy,1.4.3)
AM_CONFIG_HEADER(config.h)

dnl
dnl Command line options
dnl

dnl Set the URL name for find the statistics of tinyproxy
AC_ARG_WITH(stathost, [  --with-stathost=HOST    Default status host],
            AC_DEFINE_UNQUOTED(DEFAULT_STATHOST, "$withval"))

dnl Set the default configuration file location
AC_ARG_WITH(config,
[  --with-config=FILE      Set the default location of the config file],
	    AC_DEFINE_UNQUOTED(DEFAULT_CONF_FILE, "$withval"))

dnl Add compiler-specific optimization flags
AC_ARG_ENABLE(debug,
[  --enable-debug          Disable aggressive optimizations [default=no]],
              debug_enabled=yes, debug_enabled=no)

dnl Include SOCKS support
AC_ARG_ENABLE(socks,
[  --enable-socks          Enable SOCKS support [default=no]],
              socks_enabled=yes, socks_enabled=no)

dnl Check to see if the XTinyproxy header is to be included
AC_ARG_ENABLE(xtinyproxy,
[  --enable-xtinyproxy     Include X-Tinyproxy header [default=yes]],
              xtinyproxy_enabled=yes, xtinyproxy_enabled=yes)
if test "$xtinyproxy_enabled" = "yes"; then
    AC_DEFINE(XTINYPROXY_ENABLE)
fi

dnl Include filtering for domain/URLs
AC_ARG_ENABLE(filter,
[  --enable-filter         Enable filtering of domains/URLs [default=yes]],
              filter_enabled=yes, filter_enabled=yes)
if test "$filter_enabled" = "yes"; then
    LIBOBJS="filter.o $LIBOBJS"
    AC_DEFINE(FILTER_ENABLE)
fi

dnl Include support for TCP tunneling
AC_ARG_ENABLE(tunnel,
[  --enable-tunnel         Enable support for TCP tunneling [default=yes]],
              tunnel_enabled=yes, tunnel_enabled=yes)
if test "$tunnel_enabled" = "yes" ; then
    AC_DEFINE(TUNNEL_SUPPORT)
fi

dnl Include support for upstream proxies?
AC_ARG_ENABLE(upstream,
[  --enable-upstream       Enable support for upstream proxies [default=yes]],
              upstream_enabled=yes, upstream_enabled=yes)
if test "$upstream_enabled" = "yes"; then
    AC_DEFINE(UPSTREAM_SUPPORT)
fi

dnl Include support for a statically compiled tinyproxy
AC_ARG_ENABLE(static,
[  --enable-static         Statically link tinyproxy [default=no]],
	[ LDFLAGS="-static $LDFLAGS" ])

dnl
dnl Checks for programs
dnl

dnl Save $CFLAGS since AC_PROG_CC likes to insert "-g -O2"
dnl if $CFLAGS is blank
cflags_save="$CFLAGS"

AC_PROG_AWK
AC_PROG_MAKE_SET
AC_PROG_CC
AC_PROG_INSTALL
AC_PROG_LN_S
AM_PROG_LEX
AC_PROG_YACC

CFLAGS="$cflags_save"

dnl Make sure YACC is actually bison
if test "$YACC" != "bison -y"; then
    AC_MSG_WARN(You will need bison if you want to regenerate the parser.)
else
    AC_MSG_CHECKING(bison version)
    oldIFS=$IFS; IFS=.
    set `bison -V | sed -e 's/^GNU Bison version //'`
    IFS=$oldIFS
    if test "$1" = "1" -a "$2" -lt "25"; then
        AC_MSG_WARN(Bison 1.25 or newer needed to regenerate parsers (found $1.$2).)
    fi
    AC_MSG_RESULT($1.$2 (ok))
fi

dnl
dnl Checks for libraries
dnl
AC_CHECK_LIB(pthread, pthread_create)
if test "$ac_cv_lib_pthread_pthread_create" = "yes"; then
    CFLAGS="-D_REENTRANT $CFLAGS"
else
    AC_CHECK_LIB(pthreads, pthread_create)
    if test "$ac_cv_lib_pthreads_pthread_create" = "yes"; then
        CFLAGS="-D_REENTRANT $CFLAGS"
    else
        AC_CHECK_LIB(c_r, pthread_create)
        if test "$ac_cv_lib_c_r_pthread_create" = "yes"; then
            CFLAGS="-pthread -D_REENTRANT $CFLAGS"
        else
	    AC_MSG_ERROR(You must have a POSIX compliant threading library installed)
        fi
    fi
fi

AC_CHECK_LIB(socket, socket, , AC_CHECK_LIB(socket, htonl))

dnl Some systems (OpenServer 5) dislike -lsocket -lnsl, so we try to
dnl avoid -lnsl checks, if we already have the functions which are
dnl usually in libnsl

unset ac_cv_func_yp_get_default_domain
AC_CHECK_FUNC(yp_get_default_domain, [ tinyproxy_no_nsl_checks=yes ], [ ])
unset ac_cv_func_yp_get_default_domain

if test "$tinyproxy_no_nsl_checks" != "yes"; then
    AC_CHECK_LIB(nsl, gethostname, , AC_CHECK_LIB(nsl, gethostbyaddr))
fi

AC_CHECK_LIB(resolv, inet_aton)
AC_CHECK_LIB(socks, main, socks_library=yes, socks_library=no)

dnl
dnl Checks for headers
dnl
AC_HEADER_STDC
AC_CHECK_HEADERS(\
sys/types.h \
sys/ioctl.h \
sys/resource.h \
sys/select.h \
sys/socket.h \
sys/stat.h \
sys/sysctl.h \
sys/time.h \
sys/uio.h \
sys/un.h \
sys/wait.h \
arpa/inet.h \
netinet/in.h \
alloca.h \
assert.h \
ctype.h \
errno.h \
fcntl.h \
grp.h \
io.h \
libintl.h \
malloc.h \
memory.h \
netdb.h \
pthread.h \
pwd.h \
regex.h \
signal.h \
stdarg.h \
stddef.h \
stdint.h \
stdio.h \
stdlib.h \
string.h \
strings.h \
sysexits.h \
syslog.h \
time.h \
unistd.h \
wchar.h \
wctype.h \
)
AC_HEADER_TIME
AC_CHECK_HEADER(socks.h, socks_header=yes, socks_header=no)

dnl
dnl Checks for types
dnl
AM_C_PROTOTYPES
AC_C_CONST
AC_C_INLINE
AC_UNP_CHECK_TYPE(uint8_t, unsigned char)
AC_UNP_CHECK_TYPE(int16_t, short)
AC_UNP_CHECK_TYPE(uint16_t, unsigned short)
AC_UNP_CHECK_TYPE(int32_t, int)
AC_UNP_CHECK_TYPE(uint32_t, unsigned int)
AC_UNP_CHECK_TYPE(size_t, unsigned int)
AC_UNP_CHECK_TYPE(ssize_t, int)
AC_UNP_CHECK_TYPE(socklen_t, unsigned int)
AC_UNP_CHECK_TYPE(in_addr_t, uint32_t)
AC_TYPE_PID_T
AC_TYPE_SIGNAL

dnl
dnl Checks for functions
dnl
AC_FUNC_ALLOCA
AC_FUNC_STRFTIME
AC_FUNC_VPRINTF
AC_CHECK_FUNCS(\
ftruncate \
regexec \
select \
setrlimit \
socket \
strdup \
strerror \
strtol \
vsnprintf \
vsyslog \
)
AC_CHECK_FUNCS(strlcpy strlcat)

if test "$ac_cv_func_vprintf" != "yes"; then
    AC_CHECK_FUNC(_doprnt, AC_DEFINE(HAVE_DOPRNT))
fi

dnl
dnl Compiler characteristics
dnl

dnl Enable the debugging flags (by checking for the GCC compiler)
CFLAGS="-O2 $CFLAGS"
if test "$enable_debug" = "yes" ; then
    dnl Add the warnings if we have the GCC compiler
    if test "$ac_cv_prog_gcc" = "yes" ; then
	CFLAGS="-pg -fprofile-arcs $CFLAGS"
        CFLAGS="-Wshadow -Wcast-qual -Wcast-align -Wstrict-prototypes $CFLAGS"
        CFLAGS="-Wmissing-prototypes -Wmissing-declarations $CFLAGS"
        CFLAGS="-Wpointer-arith -Waggregate-return -Wnested-externs $CFLAGS"
    fi
    CFLAGS="-Wall -g -DYYDEBUG $CFLAGS"
    YFLAGS="-v -d"
else
    dnl No debugging information, include the optimizations
    CFLAGS="-DNDEBUG $CFLAGS"
    YFLAGS="-d"
fi

dnl
dnl Make sure we can actually handle the "--with-*" and "--enable-*" stuff.
dnl

dnl Handle the SOCKS support
if test "$socks_enabled" = "yes"; then
    if test "$socks_header" = "yes" -a "$socks_library" = "yes"; then
        CFLAGS="-I/usr/include/sock.h -DSOCKS $CFLAGS"
        LIBS="-lsocks $LIBS"
    else
        AC_MSG_ERROR([Could not include the SOCKS library or header])
    fi
fi

dnl Handle the REGEX library
if test "$ac_cv_func_regexec" != "yes"; then
    dnl We don't have a functioning REGEX so include our copy
    tinyproxy_use_our_regex=yes
else
    AC_MSG_CHECKING([whether the system's regex library is broken])
    AC_CACHE_VAL(tinyproxy_cv_regex_broken,
                 AC_TRY_RUN([
# include <unistd.h>
# include <regex.h>
int main(void)
{
	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_use_our_regex=yes
    fi
fi

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

dnl
dnl Substitute the variables into the various Makefiles
dnl
AC_SUBST(CFLAGS)
AC_SUBST(LDFLAGS)
AC_SUBST(YFLAGS)
AC_SUBST(CPPFLAGS)
AC_SUBST(LIBS)
AC_SUBST(LIBOBJS)

AC_OUTPUT(Makefile src/Makefile doc/Makefile)