# Check the compiler produces executables we can run.  If not, either# the compiler is broken, or we cross compile.echo "$as_me:$LINENO: checking whether we are cross compiling" >&5echo $ECHO_N "checking whether we are cross compiling... $ECHO_C" >&6echo "$as_me:$LINENO: result: $cross_compiling" >&5echo "${ECHO_T}$cross_compiling" >&6echo "$as_me:$LINENO: checking for suffix of executables" >&5echo $ECHO_N "checking for suffix of executables... $ECHO_C" >&6if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5  (eval $ac_link) 2>&5  ac_status=$?  echo "$as_me:$LINENO: \$? = $ac_status" >&5  (exit $ac_status); }; then  # If both `conftest.exe' and `conftest' are `present' (well, observable)# catch `conftest.exe'.  For instance with Cygwin, `ls conftest' will# work properly (i.e., refer to `conftest.exe'), while it won't with# `rm'.for ac_file in conftest.exe conftest conftest.*; do  test -f "$ac_file" || continue  case $ac_file in    *.$ac_ext | *.xcoff | *.tds | *.d | *.pdb | *.xSYM | *.bb | *.bbg | *.o | *.obj ) ;;    *.* ) ac_cv_exeext=`expr "$ac_file" : '[^.]*\(\..*\)'`	  export ac_cv_exeext	  break;;    * ) break;;  esacdoneelse  { { echo "$as_me:$LINENO: error: cannot compute suffix of executables: cannot compile and linkSee \`config.log' for more details." >&5echo "$as_me: error: cannot compute suffix of executables: cannot compile and linkSee \`config.log' for more details." >&2;}   { (exit 1); exit 1; }; }firm -f conftest$ac_cv_exeextecho "$as_me:$LINENO: result: $ac_cv_exeext" >&5echo "${ECHO_T}$ac_cv_exeext" >&6rm -f conftest.$ac_extEXEEXT=$ac_cv_exeextac_exeext=$EXEEXTecho "$as_me:$LINENO: checking for suffix of object files" >&5echo $ECHO_N "checking for suffix of object files... $ECHO_C" >&6if test "${ac_cv_objext+set}" = set; then  echo $ECHO_N "(cached) $ECHO_C" >&6else  cat >conftest.$ac_ext <<_ACEOF/* confdefs.h.  */_ACEOFcat confdefs.h >>conftest.$ac_extcat >>conftest.$ac_ext <<_ACEOF/* end confdefs.h.  */intmain (){  ;  return 0;}_ACEOFrm -f conftest.o conftest.objif { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5  (eval $ac_compile) 2>&5  ac_status=$?  echo "$as_me:$LINENO: \$? = $ac_status" >&5  (exit $ac_status); }; then  for ac_file in `(ls conftest.o conftest.obj; ls conftest.*) 2>/dev/null`; do  case $ac_file in    *.$ac_ext | *.xcoff | *.tds | *.d | *.pdb | *.xSYM | *.bb | *.bbg ) ;;    *) ac_cv_objext=`expr "$ac_file" : '.*\.\(.*\)'`       break;;  esacdoneelse  echo "$as_me: failed program was:" >&5sed 's/^/| /' conftest.$ac_ext >&5{ { echo "$as_me:$LINENO: error: cannot compute suffix of object files: cannot compileSee \`config.log' for more details." >&5echo "$as_me: error: cannot compute suffix of object files: cannot compileSee \`config.log' for more details." >&2;}   { (exit 1); exit 1; }; }firm -f conftest.$ac_cv_objext conftest.$ac_extfiecho "$as_me:$LINENO: result: $ac_cv_objext" >&5echo "${ECHO_T}$ac_cv_objext" >&6OBJEXT=$ac_cv_objextac_objext=$OBJEXTecho "$as_me:$LINENO: checking whether we are using the GNU C compiler" >&5echo $ECHO_N "checking whether we are using the GNU C compiler... $ECHO_C" >&6if test "${ac_cv_c_compiler_gnu+set}" = set; then  echo $ECHO_N "(cached) $ECHO_C" >&6else  cat >conftest.$ac_ext <<_ACEOF/* confdefs.h.  */_ACEOFcat confdefs.h >>conftest.$ac_extcat >>conftest.$ac_ext <<_ACEOF/* end confdefs.h.  */intmain (){#ifndef __GNUC__       choke me#endif  ;  return 0;}_ACEOFrm -f conftest.$ac_objextif { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5  (eval $ac_compile) 2>conftest.er1  ac_status=$?  grep -v '^ *+' conftest.er1 >conftest.err  rm -f conftest.er1  cat conftest.err >&5  echo "$as_me:$LINENO: \$? = $ac_status" >&5  (exit $ac_status); } &&	 { ac_try='test -z "$ac_c_werror_flag"			 || test ! -s conftest.err'  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5  (eval $ac_try) 2>&5  ac_status=$?  echo "$as_me:$LINENO: \$? = $ac_status" >&5  (exit $ac_status); }; } &&	 { ac_try='test -s conftest.$ac_objext'  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5  (eval $ac_try) 2>&5  ac_status=$?  echo "$as_me:$LINENO: \$? = $ac_status" >&5  (exit $ac_status); }; }; then  ac_compiler_gnu=yeselse  echo "$as_me: failed program was:" >&5sed 's/^/| /' conftest.$ac_ext >&5ac_compiler_gnu=nofirm -f conftest.err conftest.$ac_objext conftest.$ac_extac_cv_c_compiler_gnu=$ac_compiler_gnufiecho "$as_me:$LINENO: result: $ac_cv_c_compiler_gnu" >&5echo "${ECHO_T}$ac_cv_c_compiler_gnu" >&6GCC=`test $ac_compiler_gnu = yes && echo yes`ac_test_CFLAGS=${CFLAGS+set}ac_save_CFLAGS=$CFLAGSCFLAGS="-g"echo "$as_me:$LINENO: checking whether $CC accepts -g" >&5echo $ECHO_N "checking whether $CC accepts -g... $ECHO_C" >&6if test "${ac_cv_prog_cc_g+set}" = set; then  echo $ECHO_N "(cached) $ECHO_C" >&6else  cat >conftest.$ac_ext <<_ACEOF/* confdefs.h.  */_ACEOFcat confdefs.h >>conftest.$ac_extcat >>conftest.$ac_ext <<_ACEOF/* end confdefs.h.  */intmain (){  ;  return 0;}_ACEOFrm -f conftest.$ac_objextif { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5  (eval $ac_compile) 2>conftest.er1  ac_status=$?  grep -v '^ *+' conftest.er1 >conftest.err  rm -f conftest.er1  cat conftest.err >&5  echo "$as_me:$LINENO: \$? = $ac_status" >&5  (exit $ac_status); } &&	 { ac_try='test -z "$ac_c_werror_flag"			 || test ! -s conftest.err'  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5  (eval $ac_try) 2>&5  ac_status=$?  echo "$as_me:$LINENO: \$? = $ac_status" >&5  (exit $ac_status); }; } &&	 { ac_try='test -s conftest.$ac_objext'  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5  (eval $ac_try) 2>&5  ac_status=$?  echo "$as_me:$LINENO: \$? = $ac_status" >&5  (exit $ac_status); }; }; then  ac_cv_prog_cc_g=yeselse  echo "$as_me: failed program was:" >&5sed 's/^/| /' conftest.$ac_ext >&5ac_cv_prog_cc_g=nofirm -f conftest.err conftest.$ac_objext conftest.$ac_extfiecho "$as_me:$LINENO: result: $ac_cv_prog_cc_g" >&5echo "${ECHO_T}$ac_cv_prog_cc_g" >&6if test "$ac_test_CFLAGS" = set; then  CFLAGS=$ac_save_CFLAGSelif test $ac_cv_prog_cc_g = yes; then  if test "$GCC" = yes; then    CFLAGS="-g -O2"  else    CFLAGS="-g"  fielse  if test "$GCC" = yes; then    CFLAGS="-O2"  else    CFLAGS=  fifiecho "$as_me:$LINENO: checking for $CC option to accept ANSI C" >&5echo $ECHO_N "checking for $CC option to accept ANSI C... $ECHO_C" >&6if test "${ac_cv_prog_cc_stdc+set}" = set; then  echo $ECHO_N "(cached) $ECHO_C" >&6else  ac_cv_prog_cc_stdc=noac_save_CC=$CCcat >conftest.$ac_ext <<_ACEOF/* confdefs.h.  */_ACEOFcat confdefs.h >>conftest.$ac_extcat >>conftest.$ac_ext <<_ACEOF/* end confdefs.h.  */#include <stdarg.h>#include <stdio.h>#include <sys/types.h>#include <sys/stat.h>/* Most of the following tests are stolen from RCS 5.7's src/conf.sh.  */struct buf { int x; };FILE * (*rcsopen) (struct buf *, struct stat *, int);static char *e (p, i)     char **p;     int i;{  return p[i];}static char *f (char * (*g) (char **, int), char **p, ...){  char *s;  va_list v;  va_start (v,p);  s = g (p, va_arg (v,int));  va_end (v);  return s;}/* OSF 4.0 Compaq cc is some sort of almost-ANSI by default.  It has   function prototypes and stuff, but not '\xHH' hex character constants.   These don't provoke an error unfortunately, instead are silently treated   as 'x'.  The following induces an error, until -std1 is added to get   proper ANSI mode.  Curiously '\x00'!='x' always comes out true, for an   array size at least.  It's necessary to write '\x00'==0 to get something   that's true only with -std1.  */int osf4_cc_array ['\x00' == 0 ? 1 : -1];int test (int i, double x);struct s1 {int (*f) (int a);};struct s2 {int (*f) (double a);};int pairnames (int, char **, FILE *(*)(struct buf *, struct stat *, int), int, int);int argc;char **argv;intmain (){return f (e, argv, 0) != argv[0]  ||  f (e, argv, 1) != argv[1];  ;  return 0;}_ACEOF# Don't try gcc -ansi; that turns off useful extensions and# breaks some systems' header files.# AIX			-qlanglvl=ansi# Ultrix and OSF/1	-std1# HP-UX 10.20 and later	-Ae# HP-UX older versions	-Aa -D_HPUX_SOURCE# SVR4			-Xc -D__EXTENSIONS__for ac_arg in "" -qlanglvl=ansi -std1 -Ae "-Aa -D_HPUX_SOURCE" "-Xc -D__EXTENSIONS__"do  CC="$ac_save_CC $ac_arg"  rm -f conftest.$ac_objextif { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5  (eval $ac_compile) 2>conftest.er1  ac_status=$?  grep -v '^ *+' conftest.er1 >conftest.err  rm -f conftest.er1  cat conftest.err >&5  echo "$as_me:$LINENO: \$? = $ac_status" >&5  (exit $ac_status); } &&	 { ac_try='test -z "$ac_c_werror_flag"			 || test ! -s conftest.err'  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5  (eval $ac_try) 2>&5  ac_status=$?  echo "$as_me:$LINENO: \$? = $ac_status" >&5  (exit $ac_status); }; } &&	 { ac_try='test -s conftest.$ac_objext'  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5  (eval $ac_try) 2>&5  ac_status=$?  echo "$as_me:$LINENO: \$? = $ac_status" >&5  (exit $ac_status); }; }; then  ac_cv_prog_cc_stdc=$ac_argbreakelse  echo "$as_me: failed program was:" >&5sed 's/^/| /' conftest.$ac_ext >&5firm -f conftest.err conftest.$ac_objextdonerm -f conftest.$ac_ext conftest.$ac_objextCC=$ac_save_CCficase "x$ac_cv_prog_cc_stdc" in  x|xno)    echo "$as_me:$LINENO: result: none needed" >&5echo "${ECHO_T}none needed" >&6 ;;  *)    echo "$as_me:$LINENO: result: $ac_cv_prog_cc_stdc" >&5echo "${ECHO_T}$ac_cv_prog_cc_stdc" >&6    CC="$CC $ac_cv_prog_cc_stdc" ;;esac# Some people use a C++ compiler to compile C.  Since we use `exit',# in C++ we need to declare it.  In case someone uses the same compiler# for both compiling C and C++ we need to have the C++ compiler decide# the declaration of exit, since it's the most demanding environment.cat >conftest.$ac_ext <<_ACEOF#ifndef __cplusplus  choke me#endif_ACEOFrm -f conftest.$ac_objextif { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5  (eval $ac_compile) 2>conftest.er1  ac_status=$?  grep -v '^ *+' conftest.er1 >conftest.err  rm -f conftest.er1  cat conftest.err >&5  echo "$as_me:$LINENO: \$? = $ac_status" >&5  (exit $ac_status); } &&	 { ac_try='test -z "$ac_c_werror_flag"			 || test ! -s conftest.err'  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5  (eval $ac_try) 2>&5  ac_status=$?  echo "$as_me:$LINENO: \$? = $ac_status" >&5  (exit $ac_status); }; } &&	 { ac_try='test -s conftest.$ac_objext'  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5  (eval $ac_try) 2>&5  ac_status=$?  echo "$as_me:$LINENO: \$? = $ac_status" >&5  (exit $ac_status); }; }; then  for ac_declaration in \   '' \   'extern "C" void std::exit (int) throw (); using std::exit;' \   'extern "C" void std::exit (int); using std::exit;' \   'extern "C" void exit (int) throw ();' \   'extern "C" void exit (int);' \   'void exit (int);'do  cat >conftest.$ac_ext <<_ACEOF/* confdefs.h.  */_ACEOFcat confdefs.h >>conftest.$ac_extcat >>conftest.$ac_ext <<_ACEOF/* end confdefs.h.  */$ac_declaration#include <stdlib.h>intmain (){exit (42);  ;  return 0;}_ACEOFrm -f conftest.$ac_objextif { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5  (eval $ac_compile) 2>conftest.er1  ac_status=$?  grep -v '^ *+' conftest.er1 >conftest.err  rm -f conftest.er1  cat conftest.err >&5  echo "$as_me:$LINENO: \$? = $ac_status" >&5  (exit $ac_status); } &&	 { ac_try='test -z "$ac_c_werror_flag"			 || test ! -s conftest.err'  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5  (eval $ac_try) 2>&5  ac_status=$?  echo "$as_me:$LINENO: \$? = $ac_status" >&5  (exit $ac_status); }; } &&	 { ac_try='test -s conftest.$ac_objext'  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5  (eval $ac_try) 2>&5  ac_status=$?  echo "$as_me:$LINENO: \$? = $ac_status" >&5  (exit $ac_status); }; }; then  :else  echo "$as_me: failed program was:" >&5sed 's/^/| /' conftest.$ac_ext >&5continuefirm -f conftest.err conftest.$ac_objext conftest.$ac_ext  cat >conftest.$ac_ext <<_ACEOF/* confdefs.h.  */_ACEOFcat confdefs.h >>conftest.$ac_extcat >>conftest.$ac_ext <<_ACEOF/* end confdefs.h.  */$ac_declarationintmain (){exit (42);  ;  return 0;