On Mon, Sep 29, 2014 at 12:06:54AM +0300, Dima Sorkin wrote: > 1. I have read that the C99 standard allows conversions between > function pointer types (6.3.2.3 paragraph 8). But if I don't want > such conversions to appear mistakingly in program - is there any > command line option to issue a warning? -Wincompatible-pointer-types, enabled by -Wall. > 2. Consider the example below, it was compiled by > GCC 4.9.1 20140903 (prerelease) with > 'gcc -std=c99 -pedantic -Wall -Wextra'. I don't understand > why the compiler allows calling of function pointer 'g' of > type 'void (*)()' with arguments... Because "f()" does not mean "no arguments"; it means "unspecified arguments". "f(void)" is "no arguments". Segher
