+check_cxx_source_compiles(
+ "
+ #include <iconv.h>
+ // this declaration will fail when there already exists a non const char** version which returns size_t
+ double iconv(iconv_t cd, char **inbuf, size_t *inbytesleft, char **outbuf, size_t *outbytesleft);
+ int main() { return 0; }
+ "
+HAVE_ICONV_CONST)