curl/configure.in

dnl $Id$
dnl Process this file with autoconf to produce a configure script.

dnl Ensure that this file is processed with autoconf 2.50 or newer
dnl Don't even think about removing this check!
AC_PREREQ(2.50)

dnl First some basic init macros
AC_INIT
AC_CONFIG_SRCDIR([lib/urldata.h])
AM_CONFIG_HEADER(config.h src/config.h)

dnl figure out the libcurl version
VERSION=`sed -ne 's/^#define LIBCURL_VERSION "\(.*\)"/\1/p' ${srcdir}/include/curl/curl.h`
AM_INIT_AUTOMAKE(curl,$VERSION)

dnl
dnl we extract the numerical version for curl-config only
VERSIONNUM=`sed -ne 's/^#define LIBCURL_VERSION_NUM 0x\(.*\)/\1/p' ${srcdir}/include/curl/curl.h`
AC_SUBST(VERSIONNUM)

dnl Solaris pkgadd support definitions
PKGADD_PKG="HAXXcurl"
PKGADD_NAME="cURL - a client that groks URLs"
PKGADD_VENDOR="curl.haxx.se"
AC_SUBST(PKGADD_PKG)
AC_SUBST(PKGADD_NAME)
AC_SUBST(PKGADD_VENDOR)


dnl
dnl Detect the canonical host and target build environment
dnl

AC_CANONICAL_HOST
dnl Get system canonical name
AC_DEFINE_UNQUOTED(OS, "${host}")

dnl Check for AIX weirdos
AC_AIX

dnl Checks for programs.
AC_PROG_CC

dnl check for how to do large files
AC_SYS_LARGEFILE

dnl check for cygwin stuff
AC_LIBTOOL_WIN32_DLL

dnl libtool setup
AM_PROG_LIBTOOL

dnl The install stuff has already been taken care of by the automake stuff
dnl AC_PROG_INSTALL
AC_PROG_MAKE_SET

dnl ************************************************************
dnl lame option to switch on debug options
dnl
AC_MSG_CHECKING([whether to enable debug options])
AC_ARG_ENABLE(debug,
[  --enable-debug		Enable pedantic debug options
  --disable-debug		Disable debug options],
[ case "$enableval" in
  no)
       AC_MSG_RESULT(no)
       ;;
  *)   AC_MSG_RESULT(yes)

    CPPFLAGS="$CPPFLAGS -DMALLOCDEBUG"
    CFLAGS="-W -Wall -Wwrite-strings -pedantic -Wundef -Wpointer-arith -Wcast-align -Wnested-externs -g" 
       ;;
  esac ],
       AC_MSG_RESULT(no)
)

dnl **********************************************************************
dnl Checks for IPv6
dnl **********************************************************************

AC_MSG_CHECKING([whether to enable ipv6])
AC_ARG_ENABLE(ipv6,
[  --enable-ipv6		Enable ipv6 (with ipv4) support
  --disable-ipv6		Disable ipv6 support],
[ case "$enableval" in
  no)
       AC_MSG_RESULT(no)
       ipv6=no
       ;;
  *)   AC_MSG_RESULT(yes)
       ipv6=yes
       ;;
  esac ],

  AC_TRY_RUN([ /* is AF_INET6 available? */
#include <sys/types.h>
#include <sys/socket.h>
main()
{
 if (socket(AF_INET6, SOCK_STREAM, 0) < 0)
   exit(1);
 else
   exit(0);
}
],
  AC_MSG_RESULT(yes)
  ipv6=yes,
  AC_MSG_RESULT(no)
  ipv6=no,
  AC_MSG_RESULT(no)
  ipv6=no
))

if test "$ipv6" = "yes"; then
  CURL_CHECK_WORKING_GETADDRINFO
fi


dnl **********************************************************************
dnl Checks for libraries.
dnl **********************************************************************

dnl gethostbyname in the nsl lib?
AC_CHECK_FUNC(gethostbyname, , AC_CHECK_LIB(nsl, gethostbyname))

if test "$ac_cv_lib_nsl_gethostbyname" != "yes" -a "$ac_cv_func_gethostbyname" != "yes"; then
  dnl gethostbyname in the socket lib?
  AC_CHECK_FUNC(gethostbyname, , AC_CHECK_LIB(socket, gethostbyname))
fi

dnl At least one system has been identified to require BOTH nsl and
dnl socket libs to link properly.
if test "$ac_cv_lib_nsl_gethostbyname" = "$ac_cv_func_gethostbyname"; then
  AC_MSG_CHECKING([trying both nsl and socket libs])
  my_ac_save_LIBS=$LIBS
  LIBS="-lnsl -lsocket $LIBS"
  AC_TRY_LINK( ,
             [gethostbyname();],
             my_ac_link_result=success,
             my_ac_link_result=failure )

  if test "$my_ac_link_result" = "failure"; then
    AC_MSG_RESULT([no])
    AC_MSG_ERROR([couldn't find libraries for gethostbyname()])
    dnl restore LIBS
    LIBS=$my_ac_save_LIBS
  else
    AC_MSG_RESULT([yes])
  fi
fi

dnl resolve lib?
AC_CHECK_FUNC(strcasecmp, , AC_CHECK_LIB(resolve, strcasecmp))

if test "$ac_cv_lib_resolve_strcasecmp" = "$ac_cv_func_strcasecmp"; then
  AC_CHECK_LIB(resolve, strcasecmp,
              [LIBS="-lresolve $LIBS"],
               ,
               -lnsl)
fi

dnl socket lib?
AC_CHECK_FUNC(connect, , AC_CHECK_LIB(socket, connect))

dnl ucb lib?
AC_CHECK_FUNC(gethostname, , AC_CHECK_LIB(ucb, gethostname))

dnl dl lib?
AC_CHECK_FUNC(dlclose, , AC_CHECK_LIB(dl, dlopen))

dnl **********************************************************************
dnl Check how non-blocking sockets are set
dnl **********************************************************************
AC_ARG_ENABLE(nonblocking,
[  --enable-nonblocking  Makes the script detect how to do it
  --disable-nonblocking Makes the script disable non-blocking sockets],
[
  if test "$enableval" = "no" ; then
    AC_MSG_WARN([non-blocking sockets disabled])
    AC_DEFINE(HAVE_DISABLED_NONBLOCKING)
  else
    CURL_CHECK_NONBLOCKING_SOCKET
  fi
],
[
  CURL_CHECK_NONBLOCKING_SOCKET
])

dnl **********************************************************************
dnl Check for the random seed preferences 
dnl **********************************************************************

AC_ARG_WITH(egd-socket,
    [  --with-egd-socket=FILE  Entropy Gathering Daemon socket pathname],
    [ EGD_SOCKET="$withval" ]
)
if test -n "$EGD_SOCKET" ; then
	AC_DEFINE_UNQUOTED(EGD_SOCKET, "$EGD_SOCKET")
fi

dnl Check for user-specified random device
AC_ARG_WITH(random,
    [  --with-random=FILE      read randomness from FILE (default=/dev/urandom)],
    [ RANDOM_FILE="$withval" ],
    [
        dnl Check for random device
        AC_CHECK_FILE("/dev/urandom",
            [
                RANDOM_FILE="/dev/urandom";
            ]
        )
    ]
)
if test -n "$RANDOM_FILE" ; then
	AC_SUBST(RANDOM_FILE)
	AC_DEFINE_UNQUOTED(RANDOM_FILE, "$RANDOM_FILE")
fi

dnl **********************************************************************
dnl Check for the presence of Kerberos4 libraries and headers
dnl **********************************************************************

AC_ARG_WITH(krb4-includes,
 [  --with-krb4-includes[=DIR]   Specify location of kerberos4 headers],[
 CPPFLAGS="$CPPFLAGS -I$withval"
 KRB4INC="$withval"
 want_krb4=yes
 ])

AC_ARG_WITH(krb4-libs,
 [  --with-krb4-libs[=DIR]   Specify location of kerberos4 libs],[
 LDFLAGS="$LDFLAGS -L$withval"
 KRB4LIB="$withval"
 want_krb4=yes
 ])


OPT_KRB4=off
AC_ARG_WITH(krb4,dnl
[  --with-krb4[=DIR]       where to look for Kerberos4],[
  OPT_KRB4="$withval"
  if test X"$OPT_KRB4" != Xyes
  then
    LDFLAGS="$LDFLAGS -L$OPT_KRB4/lib"
    KRB4LIB="$OPT_KRB4/lib"
    CPPFLAGS="$CPPFLAGS -I$OPT_KRB4/include"
    KRB4INC="$OPT_KRB4/include"
  fi
  want_krb4="yes"
 ])

AC_MSG_CHECKING([if Kerberos4 support is requested])

if test "$want_krb4" = yes
then
  if test "$ipv6" = "yes"; then
    echo krb4 is not compatible with IPv6
    exit 1
  fi
  AC_MSG_RESULT(yes)

  dnl Check for & handle argument to --with-krb4

  AC_MSG_CHECKING(where to look for Kerberos4)
  if test X"$OPT_KRB4" = Xyes
  then
    AC_MSG_RESULT([defaults])
  else
    AC_MSG_RESULT([libs in $KRB4LIB, headers in $KRB4INC])
  fi

  dnl Check for DES library
  AC_CHECK_LIB(des, des_pcbc_encrypt,
  [
    AC_CHECK_HEADERS(des.h)

    dnl resolv lib?
    AC_CHECK_FUNC(res_search, , AC_CHECK_LIB(resolv, res_search))

    dnl Check for the Kerberos4 library
    AC_CHECK_LIB(krb, krb_net_read,
    [
      dnl Check for header files
      AC_CHECK_HEADERS(krb.h)

      dnl we found the required libraries, add to LIBS
      LIBS="-lkrb -ldes $LIBS"

      dnl Check for function krb_get_our_ip_for_realm
      dnl this is needed for NAT networks
      AC_CHECK_FUNCS(krb_get_our_ip_for_realm)

      dnl add define KRB4
      AC_DEFINE(KRB4)

      dnl substitute it too!
      KRB4_ENABLED=1
      AC_SUBST(KRB4_ENABLED)

      dnl the krb4 stuff needs a strlcpy()
      AC_CHECK_FUNCS(strlcpy)

    ])
  ])
else
  AC_MSG_RESULT(no)
fi


dnl **********************************************************************
dnl Check for the presence of SSL libraries and headers
dnl **********************************************************************

dnl Default to compiler & linker defaults for SSL files & libraries.
OPT_SSL=off
AC_ARG_WITH(ssl,dnl
[  --with-ssl[=DIR]        where to look for SSL [compiler/linker default paths]
                          DIR points to the SSL installation [/usr/local/ssl]],
  OPT_SSL=$withval
)

if test X"$OPT_SSL" = Xno
then
  AC_MSG_WARN(SSL/https support disabled)  
else

  dnl Check for and handle argument to --with-ssl.

  dnl save the pre-ssl check flags for a while
  CLEANLDFLAGS="$LDFLAGS"
  CLEANCPPFLAGS="$CPPFLAGS"

  case "$OPT_SSL" in
  yes)
    EXTRA_SSL=/usr/local/ssl ;;
  off)
    EXTRA_SSL= ;;
  *)
    dnl check the given spot right away!
    EXTRA_SSL=$OPT_SSL
    LDFLAGS="$LDFLAGS -L$EXTRA_SSL/lib"
    CPPFLAGS="$CPPFLAGS -I$EXTRA_SSL/include/openssl -I$EXTRA_SSL/include"
    ;;
  esac

  AC_CHECK_LIB(crypto, CRYPTO_lock,[
     HAVECRYPTO="yes"
     ],[
     OLDLDFLAGS="$LDFLAGS"
     OLDCPPFLAGS="$CPPFLAGS"
     LDFLAGS="$CLEANLDFLAGS -L$EXTRA_SSL/lib"
     CPPFLAGS="$CLEANCPPFLAGS -I$EXTRA_SSL/include/openssl -I$EXTRA_SSL/include"
     AC_CHECK_LIB(crypto, CRYPTO_add_lock,[
       HAVECRYPTO="yes" ], [
       LDFLAGS="$OLDLDFLAGS"
       CPPFLAGS="$OLDCPPFLAGS"
       ])
    ])


  if test "$HAVECRYPTO" = "yes"; then
    dnl This is only reasonable to do if crypto actually is there: check for
    dnl SSL libs NOTE: it is important to do this AFTER the crypto lib

    AC_CHECK_LIB(crypto, CRYPTO_add_lock)
    AC_CHECK_LIB(ssl, SSL_connect)

    if test "$ac_cv_lib_ssl_SSL_connect" != yes; then
        dnl we didn't find the SSL lib, try the RSAglue/rsaref stuff
        AC_MSG_CHECKING(for ssl with RSAglue/rsaref libs in use);
        OLIBS=$LIBS
        LIBS="$LIBS -lRSAglue -lrsaref"
        AC_CHECK_LIB(ssl, SSL_connect)
        if test "$ac_cv_lib_ssl_SSL_connect" != yes; then
            dnl still no SSL_connect
            AC_MSG_RESULT(no)
            LIBS=$OLIBS
        else
            AC_MSG_RESULT(yes)
        fi
    fi


    dnl Check for SSLeay headers
    AC_CHECK_HEADERS(openssl/x509.h openssl/rsa.h openssl/crypto.h \
                     openssl/pem.h openssl/ssl.h openssl/err.h,
      OPENSSL_ENABLED=1)

    if test $ac_cv_header_openssl_x509_h = no; then
      AC_CHECK_HEADERS(x509.h rsa.h crypto.h pem.h ssl.h err.h,
        OPENSSL_ENABLED=1)
    fi

    dnl Check for the OpenSSL engine header, it is kind of "separated"
    dnl from the main SSL check
    AC_CHECK_HEADERS(openssl/engine.h)

    AC_SUBST(OPENSSL_ENABLED)

  fi

  if test X"$OPT_SSL" != Xoff &&
     test "$OPENSSL_ENABLED" != "1"; then
    AC_MSG_ERROR([OpenSSL libs and/or directories were not found where specified!])
  fi


  dnl these can only exist if openssl exists

  AC_CHECK_FUNCS( RAND_status \
                  RAND_screen \
                  RAND_egd )

fi

dnl **********************************************************************
dnl Check for the presence of ZLIB libraries and headers
dnl **********************************************************************

dnl Default to compiler & linker defaults for files & libraries.
dnl OPT_ZLIB=no
dnl AC_ARG_WITH(zlib,dnl
dnl [  --with-zlib[=DIR]  where to look for ZLIB [compiler/linker default paths]
dnl                      DIR points to the ZLIB installation prefix [/usr/local]],
dnl  OPT_ZLIB=$withval,
dnl )

dnl Check for & handle argument to --with-zlib.
dnl
dnl NOTE:  We *always* look for ZLIB headers & libraries, all this option
dnl        does is change where we look (by adjusting LIBS and CPPFLAGS.)
dnl

dnl AC_MSG_CHECKING(where to look for ZLIB)
dnl if test X"$OPT_ZLIB" = Xno
dnl then
dnl 	AC_MSG_RESULT([defaults (or given in environment)])
dnl else
dnl	test X"$OPT_ZLIB" = Xyes && OPT_ZLIB=/usr/local
dnl	LIBS="$LIBS -L$OPT_ZLIB/lib"
dnl	CPPFLAGS="$CPPFLAGS -I$OPT_ZLIB/include"
dnl	AC_MSG_RESULT([$OPT_ZLIB])
dnl fi

dnl z lib?
dnl AC_CHECK_FUNC(gzread, , AC_CHECK_LIB(z, gzread))


dnl Default is to try the thread-safe versions of a few functions
OPT_THREAD=on
AC_ARG_ENABLE(thread,dnl
[  --disable-thread       tell configure to not look for thread-safe functions],
  OPT_THREAD=off
)

if test X"$OPT_THREAD" = Xoff
then
  AC_MSG_WARN(libcurl will not get built using thread-safe functions)
  AC_DEFINE(DISABLED_THREADSAFE, 1, \
Set to explicitly specify we don't want to use thread-safe functions)
else

  dnl dig around for gethostbyname_r()
  CURL_CHECK_GETHOSTBYNAME_R()

  dnl dig around for gethostbyaddr_r()
  CURL_CHECK_GETHOSTBYADDR_R()

  dnl poke around for inet_ntoa_r()
  CURL_CHECK_INET_NTOA_R()

  dnl is there a localtime_r()
  CURL_CHECK_LOCALTIME_R()

  AC_CHECK_FUNCS( gmtime_r )

fi

dnl **********************************************************************
dnl Back to "normal" configuring
dnl **********************************************************************

dnl Checks for header files.
AC_HEADER_STDC
AC_CHECK_HEADERS( \
        unistd.h \
        malloc.h \
        stdlib.h \
        arpa/inet.h \
        net/if.h \
        netinet/in.h \
	netinet/if_ether.h \
        netdb.h \
        sys/select.h \
        sys/socket.h \
        sys/sockio.h \
        sys/stat.h \
        sys/types.h \
        sys/time.h \
        sys/param.h \
        termios.h \
        termio.h \
        sgtty.h \
        fcntl.h \
        dlfcn.h \
        alloca.h \
        winsock.h \
        time.h \
        io.h \
        pwd.h \
        utime.h \
        sys/utime.h
)

dnl Check for libz header
dnl AC_CHECK_HEADERS(zlib.h)

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

# mprintf() checks:

# check for 'long double'
# AC_CHECK_SIZEOF(long double, 8)
# check for 'long long'
# AC_CHECK_SIZEOF(long long, 4)

# check for ssize_t
AC_CHECK_TYPE(ssize_t, int)

TYPE_SOCKLEN_T
TYPE_IN_ADDR_T

dnl Checks for library functions.
dnl AC_PROG_GCC_TRADITIONAL
AC_TYPE_SIGNAL
dnl AC_FUNC_VPRINTF
AC_CHECK_FUNCS( socket \
                select \
                strdup \
                strstr \
                strtok_r \
                strftime \
                uname \
                strcasecmp \
                stricmp \
                strcmpi \
                gethostname \
                gethostbyaddr \
                gettimeofday \
                inet_addr \
                inet_ntoa \
                tcsetattr \
                tcgetattr \
                perror \
                closesocket \
                setvbuf \
                sigaction \
                signal \
                getpass_r \
                strlcat \
                getpwuid \
                geteuid \
                dlopen \
                utime
)

dnl removed 'getpass' check on October 26, 2000

if test "$ac_cv_func_select" != "yes"; then
  AC_MSG_ERROR(Can't work without an existing select() function)
fi
if test "$ac_cv_func_socket" != "yes"; then
  AC_MSG_ERROR(Can't work without an existing socket() function)
fi

AC_PATH_PROG( PERL, perl, , 
  $PATH:/usr/local/bin/perl:/usr/bin/:/usr/local/bin )
AC_SUBST(PERL)

AC_PATH_PROGS( NROFF, gnroff nroff, , 
  $PATH:/usr/bin/:/usr/local/bin )
AC_SUBST(NROFF)

AC_PROG_YACC

dnl AC_PATH_PROG( RANLIB, ranlib, /usr/bin/ranlib, 
dnl   $PATH:/usr/bin/:/usr/local/bin )
dnl AC_SUBST(RANLIB)

AC_CONFIG_FILES([Makefile \
	   docs/Makefile \
           docs/examples/Makefile \
	   include/Makefile \
	   include/curl/Makefile \
	   src/Makefile \
	   multi/Makefile \
           lib/Makefile \
           tests/Makefile \
           tests/data/Makefile \
	   packages/Makefile \
	   packages/Win32/Makefile \
	   packages/Win32/cygwin/Makefile \
	   packages/Linux/Makefile \
	   packages/Linux/RPM/Makefile \
	   packages/Linux/RPM/curl.spec \
	   packages/Linux/RPM/curl-ssl.spec \
           packages/Solaris/Makefile \
           curl-config
])
AC_OUTPUT