re PR bootstrap/50857 (The compiler is built with exceptions and RTTI enabled)

libcpp/
	PR bootstrap/50857
	* configure.ac: Check for -fno-exceptions -fno-rtti.
	* configure: Regenerate.
	* Makefile.in (NOEXCEPTION_FLAGS): New flag.
	(ALL_CXXFLAGS): Use it.

gcc/
	PR bootstrap/50857
	* configure.ac: Check for -fno-exceptions -fno-rtti.
	* configure: Regenerate.
	* Makefile.in (NOEXCEPTION_FLAGS): New flag.
	(ALL_CXXFLAGS): Use it.

From-SVN: r180833

4 files changed, 57 insertions, 1 deletions

diff --git a/libcpp/ChangeLog b/libcpp/ChangeLog
index c19f21b..8f7d494 100644
--- a/libcpp/ChangeLog
+++ b/libcpp/ChangeLog
@@ -1,3 +1,11 @@
+2011-11-03  Michael Matz  <matz@suse.de>
+
+	PR bootstrap/50857
+	* configure.ac: Check for -fno-exceptions -fno-rtti.
+	* configure: Regenerate.
+	* Makefile.in (NOEXCEPTION_FLAGS): New flag.
+	(ALL_CXXFLAGS): Use it.
+
 2011-11-02  Paolo Carlini  <paolo.carlini@oracle.com>
 
 	* internal.h (uxstrdup, ustrchr): Return const unsigned char *.
diff --git a/libcpp/Makefile.in b/libcpp/Makefile.in
index 33c44b5..d6df46d 100644
--- a/libcpp/Makefile.in
+++ b/libcpp/Makefile.in
@@ -56,6 +56,7 @@ XGETTEXT = @XGETTEXT@
 CCDEPMODE = @CCDEPMODE@
 CXXDEPMODE = @CXXDEPMODE@
 DEPDIR = @DEPDIR@
+NOEXCEPTION_FLAGS = @noexception_flags@
 
 datarootdir = @datarootdir@
 datadir = @datadir@
@@ -72,7 +73,8 @@ INCLUDES = -I$(srcdir) -I. -I$(srcdir)/../include @INCINTL@ \
 	-I$(srcdir)/include
 
 ALL_CFLAGS = $(CFLAGS) $(WARN_CFLAGS) $(INCLUDES) $(CPPFLAGS)
-ALL_CXXFLAGS = $(CXXFLAGS) $(WARN_CXXFLAGS) $(INCLUDES) $(CPPFLAGS)
+ALL_CXXFLAGS = $(CXXFLAGS) $(WARN_CXXFLAGS) $(NOEXCEPTION_FLAGS) $(INCLUDES) \
+	$(CPPFLAGS)
 
 # The name of the compiler to use.
 ENABLE_BUILD_WITH_CXX = @ENABLE_BUILD_WITH_CXX@
diff --git a/libcpp/configure b/libcpp/configure
index a26a477..803daae 100755
--- a/libcpp/configure
+++ b/libcpp/configure
@@ -616,6 +616,7 @@ CCDEPMODE
 DEPDIR
 am__leading_dot
 WERROR
+noexception_flags
 WARN_PEDANTIC
 c_warn
 warn
@@ -4802,6 +4803,47 @@ fi
 fi
 
 
+# Disable exceptions and RTTI if building with g++
+noexception_flags=
+save_CFLAGS="$CFLAGS"
+for option in -fno-exceptions -fno-rtti; do
+  as_acx_Woption=`$as_echo "acx_cv_prog_cc_warning_$option" | $as_tr_sh`
+
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether $CC supports $option" >&5
+$as_echo_n "checking whether $CC supports $option... " >&6; }
+if { as_var=$as_acx_Woption; eval "test \"\${$as_var+set}\" = set"; }; then :
+  $as_echo_n "(cached) " >&6
+else
+  CFLAGS="$option"
+    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  eval "$as_acx_Woption=yes"
+else
+  eval "$as_acx_Woption=no"
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+
+fi
+eval ac_res=\$$as_acx_Woption
+	       { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
+$as_echo "$ac_res" >&6; }
+  if test `eval 'as_val=${'$as_acx_Woption'};$as_echo "$as_val"'` = yes; then :
+  noexception_flags="$noexception_flags${noexception_flags:+ }$option"
+fi
+  done
+CFLAGS="$save_CFLAGS"
+
+
 # Only enable with --enable-werror-always until existing warnings are
 # corrected.
 WERROR=
diff --git a/libcpp/configure.ac b/libcpp/configure.ac
index e843768..83d5bb6 100644
--- a/libcpp/configure.ac
+++ b/libcpp/configure.ac
@@ -39,6 +39,10 @@ ACX_PROG_CC_WARNING_OPTS([-Wstrict-prototypes -Wmissing-prototypes \
 			  -Wold-style-definition -Wc++-compat], [c_warn])
 ACX_PROG_CC_WARNING_ALMOST_PEDANTIC([-Wno-long-long])
 
+# Disable exceptions and RTTI if building with g++
+ACX_PROG_CC_WARNING_OPTS(
+       m4_quote(m4_do([-fno-exceptions -fno-rtti])), [noexception_flags])
+
 # Only enable with --enable-werror-always until existing warnings are
 # corrected.
 ACX_PROG_CC_WARNINGS_ARE_ERRORS([manual])