Added -D__STDC_EXT__ for HPUX.

Rev: src/configure.in:1.209

src/configure.in

-AC_REVISION("$Id: configure.in,v 1.208 1998/06/28 16:02:45 grubba Exp $")
+AC_REVISION("$Id: configure.in,v 1.209 1998/07/01 20:21:07 grubba Exp $")
 AC_INIT(interpret.c)
 AC_CONFIG_HEADER(machine.h)
 
@@ -283,6 +283,7 @@ if test $cflags_is_set = no; then
   # AC_SYS_OS_COMPILER_FLAG(Solaris,-Xc,Xc,WARN)
 
   # HP-UX
+  AC_SYS_OS_COMPILER_FLAG(HP-UX,-D__STDC_EXT__,stdc_ext,CFLAGS)
   AC_SYS_OS_COMPILER_FLAG(HP-UX,+Odataprefetch,plus_Odataprefetch,OPTIMIZE)
   AC_SYS_OS_COMPILER_FLAG(HP-UX,+Ofailsafe,plus_Ofailsafe,OPTIMIZE)
   AC_SYS_OS_COMPILER_FLAG(HP-UX,+O3,plus_O3,OPTIMIZE)