1 dnl TRY_CXX_FLAG(FLAG,[ACTION-IF-FOUND[,ACTION-IF-NOT-FOUND]])

     2 AC_DEFUN(TRY_CXX_FLAG,

     3 [echo >conftest.cc

     4 if ${CXX-g++} ${CXXFLAGS} -c [$1] conftest.cc >/dev/null 2>&1; then

     5   ifelse([$2], , :, [rm -f conftest*

     6   $2])

     7 else

     8   ifelse([$3], , :, [rm -f conftest*

     9   $3])

    10 fi

    11 rm -f conftest*])

    12 

    13 AC_DEFUN(CXX_NO_RTTI,

    14 [AC_CACHE_CHECK(whether ${CXX-g++} accepts -fno-rtti,

    15 	local_cv_flag_NO_RTTI,

    16 	TRY_CXX_FLAG(-fno-rtti,

    17 		local_cv_flag_NO_RTTI=yes,

    18 		local_cv_flag_NO_RTTI=no))

    19 test "$local_cv_flag_NO_RTTI" = yes && CXXFLAGS="$CXXFLAGS -fno-rtti"

    20 ])

    21 

    22 AC_DEFUN(CXX_NO_EXCEPTIONS,

    23 [AC_CACHE_CHECK(whether ${CXX-g++} accepts -fno-exceptions,

    24 	local_cv_flag_NO_EXCEPTIONS,

    25 	TRY_CXX_FLAG(-fno-exceptions,

    26 		local_cv_flag_NO_EXCEPTIONS=yes,

    27 		local_cv_flag_NO_EXCEPTIONS=no))

    28 test "$local_cv_flag_NO_EXCEPTIONS" = yes && CXXFLAGS="$CXXFLAGS -fno-exceptions"

    29 ])

    30