------- Comment #6 from jvdelisle at gcc dot gnu dot org 2008-07-19 23:14 ------- I should clarify something here. At this time, gfortran does not have its own dtoa() function. We are using snprintf (or sprintf) to write to a char buffer. This is done to extract the digits. We then process this string in the buffer to form the necessary formatted output.
The internal error is a sanity check only to assure that the decimal point came out in the expected position at buffer[2]. It is useful for debugging as an indicator that the printf function is working. This is particularly useful since on some platforms it has been found to be broken or not behaving as expected. That decimal point is not actually ever output by gfortran. Separate code in the library emits the "point" or "comma" per the standard according to the settings of the decimal= specifier. What I propose to do is modify the sanity check to accept a comma or a point. In the future, if we ever come up with a better dtoa() or do some other enhancements in this part of the library, this sanity code is likely to go away. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36857
