sjlj.m4: New file.

config/
	* sjlj.m4: New file.
libgcc/
	* configure.ac: Include config/sjlj.m4.
	Remove manual SJLJ check, add GCC_CHECK_SJLJ_EXCEPTIONS and adjust.
	* config.in: Regenerate.
	* configure: Likewise.
	* config.host: Replace enable_sjlj_exceptions by ac_cv_sjlj_exceptions.
libjava/
	* configure.ac: Include config/sjlj.m4.
	Remove manual SJLJ check, add GCC_CHECK_SJLJ_EXCEPTIONS and adjust.
	* include/config.h.in: Regenerate.
	* configure: Likewise.
	* exception.cc: Replace SJLJ_EXCEPTIONS by __USING_SJLJ_EXCEPTIONS__.
	* stacktrace.cc: Likewise.
	* include/default-signal.h: Likewise.
	* sysdep/i386/backtrace.h: Likewise.
libobjc/
	* configure.ac: Remove manual SJLJ check.
	* config.h.in: Regenerate.
	* configure: Likewise.
	* exception.c: Replace SJLJ_EXCEPTIONS by __USING_SJLJ_EXCEPTIONS__.
libstdc++-v3/
	* acinclude.m4 (GLIBCXX_ENABLE_SJLJ_EXCEPTIONS): Delete.
	* configure.ac: Remove GLIBCXX_ENABLE_SJLJ_EXCEPTIONS.
	* config.h.in: Regenerate.
	* configure: Likewise.
	* libsupc++/eh_personality.cc: Replace _GLIBCXX_SJLJ_EXCEPTIONS by
	__USING_SJLJ_EXCEPTIONS__.
	* libsupc++/eh_throw.cc: Likewise.
	* libsupc++/eh_ptr.cc: Likewise.
	* doc/html/manual/appendix_porting.html: Remove
	GLIBCXX_ENABLE_SJLJ_EXCEPTIONS
	* doc/xml/manual/build_hacking.xml: Likewise.
	* doc/html/manual/configure.html: Remove --enable-sjlj-exceptions.
	* doc/xml/manual/configure.xml: Likewise.

From-SVN: r223181

7 files changed, 30 insertions, 67 deletions

diff --git a/libjava/ChangeLog b/libjava/ChangeLog
index c3b47463..17650b1 100644
--- a/libjava/ChangeLog
+++ b/libjava/ChangeLog
@@ -1,3 +1,14 @@
+2015-05-13  Eric Botcazou  <ebotcazou@adacore.com>
+
+	* configure.ac: Include config/sjlj.m4.
+	Remove manual SJLJ check, add GCC_CHECK_SJLJ_EXCEPTIONS and adjust.
+	* include/config.h.in: Regenerate.
+	* configure: Likewise.
+	* exception.cc: Replace SJLJ_EXCEPTIONS by __USING_SJLJ_EXCEPTIONS__.
+	* stacktrace.cc: Likewise.
+	* include/default-signal.h: Likewise.
+	* sysdep/i386/backtrace.h: Likewise.
+
 2015-05-13  Michael Haubenwallner  <michael.haubenwallner@ssi-schaefer.com>
 
 	* Makefile.in: Regenerated with automake-1.11.6.
diff --git a/libjava/configure.ac b/libjava/configure.ac
index 01c436d..00bbd36 100644
--- a/libjava/configure.ac
+++ b/libjava/configure.ac
@@ -1,4 +1,7 @@
 dnl # Process this with autoconf to create configure
+
+sinclude(../config/sjlj.m4)
+
 AC_PREREQ(2.64)
 # Still use "libjava" here to placate dejagnu.
 AC_INIT([libjava], [version-unused],, [libjava])
@@ -699,58 +702,10 @@ INTERPRETER="$libgcj_interpreter"
 AC_SUBST(INTERPRETER)
 AM_CONDITIONAL(INTERPRETER, test "$libgcj_interpreter" = yes)
 
-AC_MSG_CHECKING([for exception model to use])
-AC_LANG_PUSH(C++)
-AC_ARG_ENABLE(sjlj-exceptions,
-  AS_HELP_STRING([--enable-sjlj-exceptions],
-                 [force use of builtin_setjmp for exceptions]),
-[:],
-[dnl Botheration.  Now we've got to detect the exception model.
-dnl Link tests against libgcc.a are problematic since -- at least
-dnl as of this writing -- we've not been given proper -L bits for
-dnl single-tree newlib and libgloss.
-dnl
-dnl This is what AC_TRY_COMPILE would do if it didn't delete the
-dnl conftest files before we got a change to grep them first.
-cat > conftest.$ac_ext << EOF
-[#]line __oline__ "configure"
-struct S { ~S(); };
-void bar();
-void foo()
-{
-  S s;
-  bar();
-}
-EOF
-old_CXXFLAGS="$CXXFLAGS"  
-CXXFLAGS=-S
-if AC_TRY_EVAL(ac_compile); then
-  if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then
-    enable_sjlj_exceptions=yes
-  elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then
-    enable_sjlj_exceptions=no
-  elif grep __cxa_end_cleanup conftest.s >/dev/null 2>&1 ; then
-    # ARM EH ABI.
-    enable_sjlj_exceptions=no
-  fi
-fi
-CXXFLAGS="$old_CXXFLAGS"
-rm -f conftest*])
-if test x$enable_sjlj_exceptions = xyes; then
-  AC_DEFINE(SJLJ_EXCEPTIONS, 1,
-	[Define if the compiler is configured for setjmp/longjmp exceptions.])
-  ac_exception_model_name=sjlj
-elif test x$enable_sjlj_exceptions = xno; then
-  ac_exception_model_name="call frame"
-else
-  AC_MSG_ERROR([unable to detect exception model])
-fi
-AC_LANG_POP(C++)
-AC_MSG_RESULT($ac_exception_model_name)
-
-# If we are non using SJLJ exceptions, and this host does not have support 
+# If we are not using SJLJ exceptions, and this host does not have support 
 # for unwinding from a signal handler, enable checked dereferences and divides.
-if test $can_unwind_signal = no && test $enable_sjlj_exceptions = no; then
+GCC_CHECK_SJLJ_EXCEPTIONS
+if test $ac_cv_sjlj_exceptions = no && test $can_unwind_signal = no; then
   CHECKREFSPEC=-fcheck-references
   DIVIDESPEC=-fuse-divide-subroutine
   EXCEPTIONSPEC=
@@ -1761,7 +1716,7 @@ case "${host}" in
 esac
 
 # If we're using sjlj exceptions, forget what we just learned.
-if test "$enable_sjlj_exceptions" = yes; then
+if test "$ac_cv_sjlj_exceptions" = yes; then
    SIGNAL_HANDLER=include/default-signal.h
    SIGNAL_HANDLER_AUX=
 fi
diff --git a/libjava/exception.cc b/libjava/exception.cc
index cc5ab7c..61734a9 100644
--- a/libjava/exception.cc
+++ b/libjava/exception.cc
@@ -112,7 +112,7 @@ _Jv_Throw (jthrowable value)
 
   /* We're happy with setjmp/longjmp exceptions or region-based
      exception handlers: entry points are provided here for both.  */
-#ifdef SJLJ_EXCEPTIONS
+#ifdef __USING_SJLJ_EXCEPTIONS__
   _Unwind_SjLj_RaiseException (&xh->unwindHeader);
 #else
   _Unwind_RaiseException (&xh->unwindHeader);
@@ -194,7 +194,7 @@ get_ttype_entry (_Unwind_Context *context, lsda_header_info *info, long i)
 
 // Using a different personality function name causes link failures
 // when trying to mix code using different exception handling models.
-#ifdef SJLJ_EXCEPTIONS
+#ifdef __USING_SJLJ_EXCEPTIONS__
 #define PERSONALITY_FUNCTION	__gcj_personality_sj0
 #define __builtin_eh_return_data_regno(x) x
 #elif defined (__SEH__)
@@ -331,7 +331,7 @@ PERSONALITY_FUNCTION (int version,
   action_record = 0;
   handler_switch_value = 0;
 
-#ifdef SJLJ_EXCEPTIONS
+#ifdef __USING_SJLJ_EXCEPTIONS__
   // The given "IP" is an index into the call-site table, with two
   // exceptions -- -1 means no-action, and 0 means terminate.  But
   // since we're using uleb128 values, we've not got random access
@@ -380,7 +380,7 @@ PERSONALITY_FUNCTION (int version,
 	  goto found_something;
 	}
     }
-#endif // SJLJ_EXCEPTIONS
+#endif // __USING_SJLJ_EXCEPTIONS__
 
   // If ip is not present in the table, C++ would call terminate.
   // ??? It is perhaps better to tweek the LSDA so that no-action
diff --git a/libjava/include/config.h.in b/libjava/include/config.h.in
index 8e718ac..ea5afe2 100644
--- a/libjava/include/config.h.in
+++ b/libjava/include/config.h.in
@@ -423,9 +423,6 @@
 /* The size of `void *', as computed by sizeof. */
 #undef SIZEOF_VOID_P
 
-/* Define if the compiler is configured for setjmp/longjmp exceptions. */
-#undef SJLJ_EXCEPTIONS
-
 /* Define if if the synchronization code should try to avoid pthread_self
    calls by caching thread IDs in a hashtable. */
 #undef SLOW_PTHREAD_SELF
diff --git a/libjava/include/default-signal.h b/libjava/include/default-signal.h
index 6aea734..629acfb 100644
--- a/libjava/include/default-signal.h
+++ b/libjava/include/default-signal.h
@@ -11,7 +11,7 @@ details.  */
 #ifndef JAVA_SIGNAL_H
 #define JAVA_SIGNAL_H 1
 
-#ifdef SJLJ_EXCEPTIONS
+#ifdef __USING_SJLJ_EXCEPTIONS__
 
 #define HANDLE_SEGV 1
 #define HANDLE_FPE 1
@@ -37,7 +37,7 @@ while (0)
 
 #define MAKE_THROW_FRAME(_exception)  do {} while (0)
 
-#else /* SJLJ_EXCEPTIONS */
+#else /* __USING_SJLJ_EXCEPTIONS__ */
 
 #undef HANDLE_SEGV
 #undef HANDLE_FPE
@@ -45,7 +45,7 @@ while (0)
 #define INIT_SEGV   do {} while (0)
 #define INIT_FPE   do {} while (0)
 
-#endif /* SJLJ_EXCEPTIONS */
+#endif /* __USING_SJLJ_EXCEPTIONS__ */
 
 #endif /* JAVA_SIGNAL_H */
   
diff --git a/libjava/stacktrace.cc b/libjava/stacktrace.cc
index d8d1f38..0fc91c4 100644
--- a/libjava/stacktrace.cc
+++ b/libjava/stacktrace.cc
@@ -325,7 +325,7 @@ _Jv_StackTrace::GetStackTraceElements (_Jv_StackTrace *trace,
 {
   ArrayList *list = new ArrayList ();
 
-#if defined (SJLJ_EXCEPTIONS) && ! defined (WIN32)
+#if defined (__USING_SJLJ_EXCEPTIONS__) && ! defined (WIN32)
   // We can't use the nCodeMap without unwinder support. Instead,
   // fake the method name by giving the IP in hex - better than nothing.  
   jstring hex = JvNewStringUTF ("0x");
@@ -344,7 +344,7 @@ _Jv_StackTrace::GetStackTraceElements (_Jv_StackTrace *trace,
       list->add (element);
     }
 
-#else /* SJLJ_EXCEPTIONS && !WIN32 */
+#else /* __USING_SJLJ_EXCEPTIONS__ && !WIN32 */
 
   //JvSynchronized (ncodeMap);
   UpdateNCodeMap ();
@@ -412,7 +412,7 @@ _Jv_StackTrace::GetStackTraceElements (_Jv_StackTrace *trace,
     }
   
   finder->close();
-#endif /* SJLJ_EXCEPTIONS && !WIN32 */
+#endif /* __USING_SJLJ_EXCEPTIONS__ && !WIN32 */
 
   JArray<Object *> *array = JvNewObjectArray (list->size (), 
     &StackTraceElement::class$, NULL);
diff --git a/libjava/sysdep/i386/backtrace.h b/libjava/sysdep/i386/backtrace.h
index 1bad2e1..cfdf07b 100644
--- a/libjava/sysdep/i386/backtrace.h
+++ b/libjava/sysdep/i386/backtrace.h
@@ -36,7 +36,7 @@ struct _Unwind_Context
   _Jv_uintptr_t ret_addr;
 };
 
-#ifdef SJLJ_EXCEPTIONS
+#ifdef __USING_SJLJ_EXCEPTIONS__
 
 #undef _Unwind_GetIPInfo
 #define _Unwind_GetIPInfo(ctx,ip_before_insn) \
@@ -50,7 +50,7 @@ struct _Unwind_Context
 #define _Unwind_Backtrace(trace_fn,state_ptr) \
   (fallback_backtrace (trace_fn, state_ptr))
 
-#endif /* SJLJ_EXCEPTIONS */
+#endif /* __USING_SJLJ_EXCEPTIONS__ */
 
 /* Unwind through the call stack calling TRACE_FN with STATE for each stack
    frame.  Returns the reason why the unwinding was stopped.  */