AC_ARG_ENABLE([fpu], AS_HELP_STRING([--disable-fpu], [Disable floating-point]))
AS_IF([test "x$enable_fpu" != "xno"], [
  AC_DEFINE([RISCV_ENABLE_FPU],,[Define if floating-point instructions are supported])
])

AC_ARG_ENABLE([64bit], AS_HELP_STRING([--disable-64bit], [Disable 64-bit mode]))
AS_IF([test "x$enable_64bit" != "xno"], [
  AC_DEFINE([RISCV_ENABLE_64BIT],,[Define if 64-bit mode is supported])
])

AC_ARG_ENABLE([rvc], AS_HELP_STRING([--enable-rvc], [Enable instruction compression]))
AS_IF([test "x$enable_rvc" = "xyes"], [
  AC_DEFINE([RISCV_ENABLE_RVC],,[Define if instruction compression is supported])
])

AC_ARG_ENABLE([vec], AS_HELP_STRING([--disable-vec], [Disable vector processor]))
AS_IF([test "x$enable_vec" != "xno"], [
  AC_DEFINE([RISCV_ENABLE_VEC],,[Define if vector processor is supported])
])

AC_SUBST(INCDIRS)