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#
# Due to libtool and automake machinery limitations of not allowing
# specifying separate CPPFLAGS or CFLAGS when compiling objects for
# inclusion of these in shared or static libraries, we are forced to
# build using separate configure runs for shared and static libraries
# on systems where different CPPFLAGS or CFLAGS are mandatory in order
# to compile objects for each kind of library. Notice that relying on
# the '-DPIC' CFLAG that libtool provides is not valid given that the
# user might for example choose to build static libraries with PIC.
#

#
# Make our Makefile.am files use the staticlib CPPFLAG only when strictly
# targeting a static library and not building its shared counterpart.
#

AM_CONDITIONAL([USE_CPPFLAG_CARES_STATICLIB],
  [test "x$xc_lt_build_static_only" = 'xyes'])

#
# Make staticlib CPPFLAG variable and its definition visible in output
# files unconditionally, providing an empty definition unless strictly
# targeting a static library and not building its shared counterpart.
#

CPPFLAG_CARES_STATICLIB=
if test "x$xc_lt_build_static_only" = 'xyes'; then
  CPPFLAG_CARES_STATICLIB='-DCARES_STATICLIB'
fi
AC_SUBST([CPPFLAG_CARES_STATICLIB])

dnl **********************************************************************
dnl platform/compiler/architecture specific checks/flags
dnl **********************************************************************

CARES_CHECK_COMPILER
CARES_SET_COMPILER_BASIC_OPTS
CARES_SET_COMPILER_DEBUG_OPTS
CARES_SET_COMPILER_OPTIMIZE_OPTS
CARES_SET_COMPILER_WARNING_OPTS

if test "$compiler_id" = "INTEL_UNIX_C"; then
  #
  if test "$compiler_num" -ge "1000"; then
    dnl icc 10.X or later
    CFLAGS="$CFLAGS -shared-intel"
  elif test "$compiler_num" -ge "900"; then
    dnl icc 9.X specific
    CFLAGS="$CFLAGS -i-dynamic"
  fi
  #
fi

CARES_CHECK_COMPILER_HALT_ON_ERROR
CARES_CHECK_COMPILER_ARRAY_SIZE_NEGATIVE
CARES_CHECK_COMPILER_PROTOTYPE_MISMATCH
CARES_CHECK_COMPILER_SYMBOL_HIDING

CARES_CHECK_CURLDEBUG
AM_CONDITIONAL(CURLDEBUG, test x$want_curldebug = xyes)

dnl **********************************************************************
dnl Compilation based checks should not be done before this point.
dnl **********************************************************************

dnl **********************************************************************
dnl Make sure that our checks for headers windows.h winsock.h winsock2.h 
dnl and ws2tcpip.h take precedence over any other further checks which 
dnl could be done later using AC_CHECK_HEADER or AC_CHECK_HEADERS for
dnl this specific header files. And do them before its results are used.
dnl **********************************************************************

CURL_CHECK_HEADER_WINDOWS
CURL_CHECK_NATIVE_WINDOWS
case X-"$ac_cv_native_windows" in
  X-yes)
    CURL_CHECK_HEADER_WINSOCK
    CURL_CHECK_HEADER_WINSOCK2
    CURL_CHECK_HEADER_WS2TCPIP
    CPPFLAGS="$CPPFLAGS -D_WIN32_WINNT=0x0600"
    ;;
  *)
    ac_cv_header_winsock_h="no"
    ac_cv_header_winsock2_h="no"
    ac_cv_header_ws2tcpip_h="no"
    ;;
esac

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

CARES_CHECK_LIB_XNET

dnl gethostbyname without lib or in the nsl lib?
AC_CHECK_FUNC(gethostbyname,
              [HAVE_GETHOSTBYNAME="1"
              ],
              [ AC_CHECK_LIB(nsl, gethostbyname,
                             [HAVE_GETHOSTBYNAME="1"
                             LIBS="$LIBS -lnsl"
                             ])
              ])

if test "$HAVE_GETHOSTBYNAME" != "1"
then
  dnl gethostbyname in the socket lib?
  AC_CHECK_LIB(socket, gethostbyname,
               [HAVE_GETHOSTBYNAME="1"
               LIBS="$LIBS -lsocket"
               ])
fi

dnl At least one system has been identified to require BOTH nsl and socket
dnl libs at the same time to link properly.
if test "$HAVE_GETHOSTBYNAME" != "1"
then
  AC_MSG_CHECKING([for gethostbyname with both nsl and socket libs])
  my_ac_save_LIBS=$LIBS
  LIBS="-lnsl -lsocket $LIBS"