--- autoconf-2.13/acgeneral.m4~	Tue Jun 26 17:00:28 2001

+++ autoconf-2.13/acgeneral.m4	Tue Jun 26 17:00:28 2001

@@ -1817,10 +1817,6 @@

 [cat > conftest.$ac_ext <

 [#]line __oline__ "configure"

 #include "confdefs.h"

-ifelse(AC_LANG, CPLUSPLUS, [#ifdef __cplusplus

-extern "C" void exit(int);

-#endif

-])dnl

 [$1]

 EOF

 if AC_TRY_EVAL(ac_link) && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null

--- autoconf-2.13/acspecific.m4~	Tue Jun 26 17:04:34 2001

+++ autoconf-2.13/acspecific.m4		Tue Jun 26 17:04:34 2001

@@ -152,8 +152,41 @@

     CXXFLAGS=

   fi

 fi

+

+AC_PROG_CXX_EXIT_DECLARATION

 ])

+

+# AC_PROG_CXX_EXIT_DECLARATION

+# -----------------------------

+# Find a valid prototype for exit and declare it in confdefs.h.

+AC_DEFUN(AC_PROG_CXX_EXIT_DECLARATION,

+[for ac_declaration in \

+   ''\

+   '#include <stdlib.h>' \

+   '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

+  AC_TRY_COMPILE([#include <stdlib.h>

+$ac_declaration], 

+                 [exit (42);],

+                 [],

+                 [continue])

+  AC_TRY_COMPILE([$ac_declaration],

+                 [exit (42);],

+                 [break])

+done

+if test -n "$ac_declaration"; then

+  echo '#ifdef __cplusplus' >>confdefs.h

+  echo $ac_declaration      >>confdefs.h

+  echo '#endif'             >>confdefs.h

+fi

+])# AC_PROG_CXX_EXIT_DECLARATION

+

+

 dnl Determine a Fortran 77 compiler to use.  If `F77' is not already set

 dnl in the environment, check for `g77', `f77' and `f2c', in that order.

 dnl Set the output variable `F77' to the name of the compiler found.