build: fix setting of -fno-exceptions compiler flag

configure.in

@@ -494,8 +494,6 @@ case "$target" in
 
         _MOZ_RTTI_FLAGS_ON='-GR'
         _MOZ_RTTI_FLAGS_OFF='-GR-'
-        _MOZ_EXCEPTIONS_FLAGS_ON='-EHsc'
-        _MOZ_EXCEPTIONS_FLAGS_OFF=''
 
         if test -n "$WIN32_REDIST_DIR"; then
             WIN32_REDIST_DIR=`cd "$WIN32_REDIST_DIR" && pwd`
@@ -1284,7 +1282,7 @@ dnl GNU specific defaults
 dnl ========================================================
 if test "$GNU_CC"; then
     # FIXME: Let us build with strict aliasing. bug 414641.
-    CFLAGS="$CFLAGS -fno-strict-aliasing"
+    CFLAGS="$CFLAGS -fno-exceptions -fno-strict-aliasing"
     MKSHLIB='$(CXX) $(CXXFLAGS) $(DSO_PIC_CFLAGS) $(DSO_LDOPTS) -Wl,-h,$@ -o $@'
     MKCSHLIB='$(CC) $(CFLAGS) $(DSO_PIC_CFLAGS) $(DSO_LDOPTS) -Wl,-h,$@ -o $@'
     DSO_LDOPTS='-shared'
@@ -1298,8 +1296,6 @@ if test "$GNU_CC"; then
     ASFLAGS="$ASFLAGS -fPIC"
     _MOZ_RTTI_FLAGS_ON=${_COMPILER_PREFIX}-frtti
     _MOZ_RTTI_FLAGS_OFF=${_COMPILER_PREFIX}-fno-rtti
-    _MOZ_EXCEPTIONS_FLAGS_ON='-fhandle-exceptions'
-    _MOZ_EXCEPTIONS_FLAGS_OFF='-fno-handle-exceptions'
 
     # Turn on GNU specific features
     # -Wall - turn on all warnings
@@ -1781,8 +1777,6 @@ case "$target" in
     DSO_LDOPTS='-elf -shared'
     MKSHLIB='$(CCC) $(CXXFLAGS) $(DSO_PIC_CFLAGS) $(DSO_LDOPTS) -o $@'
     MKCSHLIB='$(CC) $(CFLAGS) $(DSO_PIC_CFLAGS) $(DSO_LDOPTS) -o $@'
-    _MOZ_EXCEPTIONS_FLAGS_OFF="-LANG:exceptions=OFF"
-    _MOZ_EXCEPTIONS_FLAGS_ON="-LANG:exceptions=ON"
     if test "$GNU_CC"; then
        MKSHLIB_FORCE_ALL='-Wl,-all'
        MKSHLIB_UNFORCE_ALL='-Wl,-none'
@@ -3176,34 +3170,7 @@ EOF
 	    ;;
 esac
 
-dnl ===================================================================
-dnl ========================================================
-dnl By default, turn rtti and exceptions off on g++/egcs
-dnl ========================================================
-if test "$GNU_CXX"; then
-
-  AC_MSG_CHECKING(for C++ exceptions flag)
-
-  dnl They changed -f[no-]handle-exceptions to -f[no-]exceptions in g++ 2.8
-  AC_CACHE_VAL(ac_cv_cxx_exceptions_flags,
-  [echo "int main() { return 0; }" | cat > conftest.C
-
-  ${CXX-g++} ${CXXFLAGS} -c -fno-handle-exceptions conftest.C > conftest.out 2>&1
-
-  if egrep "warning.*renamed" conftest.out >/dev/null; then
-    ac_cv_cxx_exceptions_flags=${_COMPILER_PREFIX}-fno-exceptions
-  else
-    ac_cv_cxx_exceptions_flags=${_COMPILER_PREFIX}-fno-handle-exceptions
-  fi
-
-  rm -f conftest*])
-
-  AC_MSG_RESULT($ac_cv_cxx_exceptions_flags)
-  _MOZ_EXCEPTIONS_FLAGS_OFF=$ac_cv_cxx_exceptions_flags
-  _MOZ_EXCEPTIONS_FLAGS_ON=`echo $ac_cv_cxx_exceptions_flags | sed 's|no-||'`
-fi
-
-dnl ========================================================
+/dnl ========================================================
 dnl Put your C++ language/feature checks below
 dnl ========================================================
 AC_LANG_CPLUSPLUS
@@ -4163,32 +4130,6 @@ dnl Note that we assume that mac & win32 have short wchar (see nscore.h)
     fi
 fi
 
-dnl ========================================================
-dnl C++ exceptions (g++/egcs only - for now)
-dnl Should be smarter and check that the compiler does indeed have exceptions
-dnl ========================================================
-MOZ_ARG_ENABLE_BOOL(cpp-exceptions,
-[  --enable-cpp-exceptions Enable C++ exceptions ],
-[ _MOZ_CPP_EXCEPTIONS=1 ],
-[ _MOZ_CPP_EXCEPTIONS= ])
-
-if test "$_MOZ_CPP_EXCEPTIONS"; then
-    _MOZ_EXCEPTIONS_FLAGS=$_MOZ_EXCEPTIONS_FLAGS_ON
-else
-    _MOZ_EXCEPTIONS_FLAGS=$_MOZ_EXCEPTIONS_FLAGS_OFF
-fi
-
-AC_SUBST(_MOZ_EXCEPTIONS_FLAGS_ON)
-
-# Irix & OSF native compilers do not like exception declarations 
-# when exceptions are disabled
-if test -n "$MIPSPRO_CXX" -o -n "$COMPAQ_CXX" -o -n "$VACPP"; then
-    AC_DEFINE(CPP_THROW_NEW, [])
-else
-    AC_DEFINE(CPP_THROW_NEW, [throw()])
-fi
-AC_LANG_C
-
 dnl ========================================================
 dnl =
 dnl = Build depencency options