d: Build the D sources in the front-end with -fno-exceptions

The D front-end does not use exceptions, but it still requires RTTI for
some lowerings of convenience language features.  Enforce it with by
building with `-fno-exceptions'.

gcc/d/ChangeLog:

	* Make-lang.in (NOEXCEPTION_DFLAGS): Define.
	(ALL_DFLAGS): Add NO_EXCEPTION_DFLAGS.

diff --git a/gcc/d/Make-lang.in b/gcc/d/Make-lang.in
index 9f1343702185586d65afe1239a20e75f70a44048..6f9b2e5c26a140e2468babe48073a200ac1bd606 100644 (file)
--- a/gcc/d/Make-lang.in
+++ b/gcc/d/Make-lang.in
@@ -57,8 +57,12 @@ CHECKING_DFLAGS =
 endif
 WARN_DFLAGS = -Wall -Wdeprecated $(NOCOMMON_FLAG)
 
+# D front-end doesn't use exceptions, but it does require RTTI.
+NOEXCEPTION_DFLAGS = $(filter-out -fno-rtti, $(NOEXCEPTION_FLAGS))
+
 ALL_DFLAGS = $(DFLAGS-$@) $(GDCFLAGS) -fversion=IN_GCC $(CHECKING_DFLAGS) \
-       $(PICFLAG) $(ALIASING_FLAGS) $(COVERAGE_FLAGS) $(WARN_DFLAGS)
+       $(PICFLAG) $(ALIASING_FLAGS) $(NOEXCEPTION_DFLAGS) $(COVERAGE_FLAGS) \
+       $(WARN_DFLAGS)
 
 DCOMPILE.base = $(GDC) $(NO_PIE_CFLAGS) -c $(ALL_DFLAGS) -o $@
 DCOMPILE = $(DCOMPILE.base) -MT $@ -MMD -MP -MF $(@D)/$(DEPDIR)/$(*F).TPo