configure.in (USE_UNWIND_EXCEPTIONS): Add support to set USE_UNWIND_EXCEPTIONS…

configure.in (USE_UNWIND_EXCEPTIONS): Add support to set USE_UNWIND_EXCEPTIONS if --enable-libunwind-exceptions is set.

        * configure.in (USE_UNWIND_EXCEPTIONS): Add support to set
        USE_UNWIND_EXCEPTIONS if --enable-libunwind-exceptions is set.
        * configure, config.in: Regenerate.

        * g++spec.c (LIBUNWIND): New.
        (lang_specific_driver): Add it if USE_UNWIND_EXCEPTIONS is set.

From-SVN: r54636

gcc/ChangeLog

+2002-06-14  Steve Ellcey  <sje@cup.hp.com>
+
+	* configure.in (USE_UNWIND_EXCEPTIONS): Add support to set
+	USE_UNWIND_EXCEPTIONS if --enable-libunwind-exceptions is set.
+	* configure, config.in: Regenerate.
+
 2002-06-14  Eric Botcazou  <ebotcazou@multimania.com>
 
 	* loop.c (check_final_value): Use v->always_executed

gcc/config.in

-/* config.in.  Generated automatically from configure.in by autoheader 2.13.  */
+/* config.in.  Generated automatically from configure.in by autoheader.  */
 
 /* Define if using alloca.c.  */
 #undef C_ALLOCA
@@ -482,14 +482,14 @@
 /* Define if host mkdir takes a single argument. */
 #undef MKDIR_TAKES_ONE_ARG
 
-/* Define if the target architecture needs extra machine modes to represent
-   the results of comparisons. */
-#undef EXTRA_CC_MODES
-
 /* Define to the name of a file containing a list of extra machine modes
    for this architecture. */
 #undef EXTRA_MODES_FILE
 
+/* Define if the target architecture needs extra machine modes to represent
+   the results of comparisons. */
+#undef EXTRA_CC_MODES
+
 /* Define if you have the iconv() function. */
 #undef HAVE_ICONV
 
@@ -582,6 +582,9 @@
 /* Define 0/1 to force the choice for exception handling model. */
 #undef CONFIG_SJLJ_EXCEPTIONS
 
+/* Define if gcc should use -lunwind. */
+#undef USE_LIBUNWIND_EXCEPTIONS
+
 
 /* Bison unconditionally undefines `const' if neither `__STDC__' nor
    __cplusplus are defined.  That's a problem since we use `const' in

gcc/configure.in

@@ -2336,6 +2336,16 @@ AC_ARG_ENABLE(sjlj-exceptions,
 AC_DEFINE_UNQUOTED(CONFIG_SJLJ_EXCEPTIONS, $sjlj,
   [Define 0/1 to force the choice for exception handling model.])])
 
+# Use libunwind based exception handling.
+AC_ARG_ENABLE(libunwind-exceptions,
+[  --enable-libunwind-exceptions  force use libunwind for exceptions],
+use_libunwind_exceptions=$enableval,
+use_libunwind_exceptions=no)
+if test x"$use_libunwind_exceptions" = xyes; then
+   AC_DEFINE(USE_LIBUNWIND_EXCEPTIONS, 1,
+	[Define if gcc should use -lunwind.])
+fi
+
 # Make empty files to contain the specs and options for each language.
 # Then add #include lines to for a compiler that has specs and/or options.
 

gcc/cp/ChangeLog

+2002-06-14  Steve Ellcey  <sje@cup.hp.com>
+
+	* g++spec.c (LIBUNWIND): New.
+	(lang_specific_driver): Add it if USE_UNWIND_EXCEPTIONS is set.
+
 2002-06-13  Jessica Han  <jessica@cup.hp.com>
 
 	* class.c (build_vtable): Use TARGET_VTABLE_ENTRY_ALIGN.

gcc/cp/g++spec.c

@@ -43,6 +43,10 @@ Boston, MA 02111-1307, USA.  */
 #define LIBSTDCXX_PROFILE "-lstdc++"
 #endif
 
+#ifndef LIBUNWIND
+#define LIBUNWIND "-lunwind"
+#endif
+
 void
 lang_specific_driver (in_argc, in_argv, in_added_libraries)
      int *in_argc;
@@ -272,6 +276,10 @@ lang_specific_driver (in_argc, in_argv, in_added_libraries)
     {
       arglist[j++] = saw_profile_flag ? LIBSTDCXX_PROFILE : LIBSTDCXX;
       added_libraries++;
+#ifdef USE_LIBUNWIND_EXCEPTIONS
+      arglist[j++] = LIBUNWIND;
+      added_libraries++;
+#endif
     }
   if (saw_math)
     arglist[j++] = saw_math;