AC_CACHE_CHECK(if we can use GCC-specific compiler options, rd_cv_gcc_opt,
[AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[return 0 ]])],[rd_cv_gcc_opt=yes],[rd_cv_gcc_opt=no ])
]
AC_CACHE_CHECK(if we can use GCC-specific compiler options, rd_cv_gcc_opt,
[AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[return 0 ]])],[rd_cv_gcc_opt=yes],[rd_cv_gcc_opt=no ])
]