[Redirect to gcc-help] On 06/08/2012 09:54 AM, Bin.Cheng wrote: > In micro-controller applications, code size is critical and the size > problem is worse if library is linked. > For example, most c programs call printf to format output data, that > means floating point code get linked even the program only want to > output non-floating point numbers. Currently, we rely on end-user to > call iprintf if the program does not want floating point. > > I noticed that GCC now can check format string of printf functions, so > I am wondering if it is possible to take advantage of this utility, by > making gcc detect whether printf prints floating point number and then > generate assembly directive in backend to pull in floating point > functions only if necessary. It wouldn't be at all difficult, but you'd have to change gcc. Andrew.
