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what does it mean: "line out of range" ?
- From: "Michael Gong" <mwgong at cs dot utoronto dot ca>
- To: <gcc-help at gcc dot gnu dot org>
- Date: Thu, 8 Mar 2007 15:48:03 -0500
- Subject: what does it mean: "line out of range" ?
Hi,
I have a file : foo.c, which is like:
#line 20 "./.acc_dir/c-typeck.c"
int main() {
#line 39309 "./.acc_dir/c-typeck.c" <-- if change to 32767, no
warning message below
return 3;
}
gcc -c foo.c -pedantic
./.acc_dir/c-typeck.c:22:7: warning: line number out of range.
It seems that when the line number > 32767, which is the max of short
int, the warning message is issued. So I assume gcc uses a short int to
store the line number.
Is it appropriate ?
According to C99,
# line digit-sequence new-line
causes the implementation to behave as if the following sequence of
source lines begins with a source line that has a line number as
specified by the digit sequence (interpreted as a decimal integer). The
digit sequence shall not specify zero, nor a number greater than
2147483647.
there should not be such a limit of 32767.
Can anyone clarify it ?
Thanks.
Mike