# _LT_AC_LOCK# -----------AC_DEFUN([_LT_AC_LOCK],[AC_ARG_ENABLE([libtool-lock],    [AC_HELP_STRING([--disable-libtool-lock],	[avoid locking (might break parallel builds)])])test "x$enable_libtool_lock" != xno && enable_libtool_lock=yes# Some flags need to be propagated to the compiler or linker for good# libtool support.case $host inia64-*-hpux*)  # Find out which ABI we are using.  echo 'int i;' > conftest.$ac_ext  if AC_TRY_EVAL(ac_compile); then    case `/usr/bin/file conftest.$ac_objext` in    *ELF-32*)      HPUX_IA64_MODE="32"      ;;    *ELF-64*)      HPUX_IA64_MODE="64"      ;;    esac  fi  rm -rf conftest*  ;;*-*-irix6*)  # Find out which ABI we are using.  echo '[#]line __oline__ "configure"' > conftest.$ac_ext  if AC_TRY_EVAL(ac_compile); then   if test "$lt_cv_prog_gnu_ld" = yes; then    case `/usr/bin/file conftest.$ac_objext` in    *32-bit*)      LD="${LD-ld} -melf32bsmip"      ;;    *N32*)      LD="${LD-ld} -melf32bmipn32"      ;;    *64-bit*)      LD="${LD-ld} -melf64bmip"      ;;    esac   else    case `/usr/bin/file conftest.$ac_objext` in    *32-bit*)      LD="${LD-ld} -32"      ;;    *N32*)      LD="${LD-ld} -n32"      ;;    *64-bit*)      LD="${LD-ld} -64"      ;;    esac   fi  fi  rm -rf conftest*  ;;x86_64-*linux*|ppc*-*linux*|powerpc*-*linux*|s390*-*linux*|sparc*-*linux*)  # Find out which ABI we are using.  echo 'int i;' > conftest.$ac_ext  if AC_TRY_EVAL(ac_compile); then    case "`/usr/bin/file conftest.o`" in    *32-bit*)      case $host in        x86_64-*linux*)          LD="${LD-ld} -m elf_i386"          ;;        ppc64-*linux*|powerpc64-*linux*)          LD="${LD-ld} -m elf32ppclinux"          ;;        s390x-*linux*)          LD="${LD-ld} -m elf_s390"          ;;        sparc64-*linux*)          LD="${LD-ld} -m elf32_sparc"          ;;      esac      ;;    *64-bit*)      case $host in        x86_64-*linux*)          LD="${LD-ld} -m elf_x86_64"          ;;        ppc*-*linux*|powerpc*-*linux*)          LD="${LD-ld} -m elf64ppc"          ;;        s390*-*linux*)          LD="${LD-ld} -m elf64_s390"          ;;        sparc*-*linux*)          LD="${LD-ld} -m elf64_sparc"          ;;      esac      ;;    esac  fi  rm -rf conftest*  ;;*-*-sco3.2v5*)  # On SCO OpenServer 5, we need -belf to get full-featured binaries.  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Even if it were fixed, the result of this    # check would be larger than it should be.    lt_cv_sys_max_cmd_len=12288;    # 12K is about right    ;;  gnu*)    # Under GNU Hurd, this test is not required because there is    # no limit to the length of command line arguments.    # Libtool will interpret -1 as no limit whatsoever    lt_cv_sys_max_cmd_len=-1;    ;;  cygwin* | mingw*)    # On Win9x/ME, this test blows up -- it succeeds, but takes    # about 5 minutes as the teststring grows exponentially.    # Worse, since 9x/ME are not pre-emptively multitasking,    # you end up with a "frozen" computer, even though with patience    # the test eventually succeeds (with a max line length of 256k).    # Instead, let's just punt: use the minimum linelength reported by    # all of the supported platforms: 8192 (on NT/2K/XP).    lt_cv_sys_max_cmd_len=8192;    ;;  amigaos*)    # On AmigaOS with pdksh, this test takes hours, literally.    # So we just punt and use a minimum line length of 8192.    lt_cv_sys_max_cmd_len=8192;    ;; *)    # If test is not a shell built-in, we'll probably end up computing a    # maximum length that is only half of the actual maximum length, but    # we can't tell.    while (test "X"`$CONFIG_SHELL [$]0 --fallback-echo "X$teststring" 2>/dev/null` \	       = "XX$teststring") >/dev/null 2>&1 &&	    new_result=`expr "X$teststring" : ".*" 2>&1` &&	    lt_cv_sys_max_cmd_len=$new_result &&	    test $i != 17 # 1/2 MB should be enough    do      i=`expr $i + 1`      teststring=$teststring$teststring    done    teststring=    # Add a significant safety factor because C++ compilers can tack on massive    # amounts of additional arguments before passing them to the linker.    # It appears as though 1/2 is a usable value.    lt_cv_sys_max_cmd_len=`expr $lt_cv_sys_max_cmd_len \/ 2`    ;;  esac])if test -n $lt_cv_sys_max_cmd_len ; then  AC_MSG_RESULT($lt_cv_sys_max_cmd_len)else  AC_MSG_RESULT(none)fi])# AC_LIBTOOL_SYS_MAX_CMD_LEN# _LT_AC_CHECK_DLFCN# --------------------AC_DEFUN([_LT_AC_CHECK_DLFCN],[AC_CHECK_HEADERS(dlfcn.h)dnl])# _LT_AC_CHECK_DLFCN# _LT_AC_TRY_DLOPEN_SELF (ACTION-IF-TRUE, ACTION-IF-TRUE-W-USCORE,#                           ACTION-IF-FALSE, ACTION-IF-CROSS-COMPILING)# ------------------------------------------------------------------AC_DEFUN([_LT_AC_TRY_DLOPEN_SELF],[AC_REQUIRE([_LT_AC_CHECK_DLFCN])dnlif test "$cross_compiling" = yes; then :  [$4]else  lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2  lt_status=$lt_dlunknown  cat > conftest.$ac_ext <<EOF[#line __oline__ "configure"#include "confdefs.h"#if HAVE_DLFCN_H#include <dlfcn.h>#endif#include <stdio.h>#ifdef RTLD_GLOBAL#  define LT_DLGLOBAL		RTLD_GLOBAL#else#  ifdef DL_GLOBAL#    define LT_DLGLOBAL		DL_GLOBAL#  else#    define LT_DLGLOBAL		0#  endif#endif/* We may have to define LT_DLLAZY_OR_NOW in the command line if we   find out it does not work in some platform. */#ifndef LT_DLLAZY_OR_NOW#  ifdef RTLD_LAZY#    define LT_DLLAZY_OR_NOW		RTLD_LAZY#  else#    ifdef DL_LAZY#      define LT_DLLAZY_OR_NOW		DL_LAZY#    else#      ifdef RTLD_NOW#        define LT_DLLAZY_OR_NOW	RTLD_NOW#      else#        ifdef DL_NOW#          define LT_DLLAZY_OR_NOW	DL_NOW#        else#          define LT_DLLAZY_OR_NOW	0#        endif#      endif#    endif#  endif#endif#ifdef __cplusplusextern "C" void exit (int);#endifvoid fnord() { int i=42;}int main (){  void *self = dlopen (0, LT_DLGLOBAL|LT_DLLAZY_OR_NOW);  int status = $lt_dlunknown;  if (self)    {      if (dlsym (self,"fnord"))       status = $lt_dlno_uscore;      else if (dlsym( self,"_fnord")) status = $lt_dlneed_uscore;      /* dlclose (self); */    }    exit (status);}]EOF  if AC_TRY_EVAL(ac_link) && test -s conftest${ac_exeext} 2>/dev/null; then    (./conftest; exit; ) 2>/dev/null    lt_status=$? 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