4.3.5 but 4.5.0 looks about the same, but it has an additional instance: mber/dpd -I../libdecnumber -I/usr/local/include ../../gcc/gcc/opts.c -o opts.o ../../gcc/gcc/opts.c: In function `wrap_help': ../../gcc/gcc/opts.c:1037: warning: field width is not type int (arg 3) ../../gcc/gcc/opts.c:1037: warning: field width is not type int (arg 5) ../../gcc/gcc/opts.c: In function `common_handle_option': ../../gcc/gcc/opts.c:1409: warning: field width is not type int (arg 3) gcc -c -g -O2 -DIN_GCC -W -Wall -Wwrite-strings -Wstrict-prototypes -Wmissin jbook2:gcc jay$ diff -uw opts.c.orig opts.c --- opts.c.orig 2010-07-19 00:07:18.000000000 -0700 +++ opts.c 2010-07-19 00:16:27.000000000 -0700 @@ -1034,7 +1034,10 @@ } } - printf( " %-*.*s %.*s\n", col_width, item_width, item, len, help); + gcc_assert(col_width <= INT_MAX); + gcc_assert(item_width <= INT_MAX); + gcc_assert(len <= INT_MAX); + printf (" %-*.*s %.*s\n", (int)col_width, (int)item_width, item, (int)len, help); item_width = 0; while (help[len] == ' ') len++; @@ -1404,9 +1407,12 @@ } if (i == cl_lang_count) + { + gcc_assert (len <= INT_MAX); fnotice (stderr, "warning: unrecognized argument to --help= switch: %.*s\n", - len, a); + (int)len, a); + } } if (comma == NULL) This makes a line go a little over 80 columns, but one of the "nearby" lines does already. (nearby as presented here, not really in the code) This probably isn't the best fix. if the output is "not important", and someone manages to create huge data, should still work. Yes, I'm aware of that "huge" is 2GB. Maybe: int to_reasonable_diagnostic_length(unsigned i) { return (i <= INT_MAX) ? i : 255; } or int unint_to_int_pin(unsigned i) { return (i <= INT_MAX) ? i : INT_MAX; } and then apply those. - Jay
unsigned int and int are passed exactly the same for varargs and in fact the C standard says getting an unsigned version of the signed type for varargs is valid.
What compiler version is giving a warning for this case? That is can you provide the output of "gcc -v" ?
> which compiler produces this I'm afraid I'm not sure and can't quickly/easily make it happen again. Sorry.
No feedback in 3 years so closing.