https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99608
Bug ID: 99608
Summary: gcc doesn't print diagnostics carets when file is
passed through stdin
Product: gcc
Version: 10.2.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: driver
Assignee: unassigned at gcc dot gnu.org
Reporter: freezer at posteo dot de
Target Milestone: ---
When a file is passed to gcc through stdin, gcc won't print any diagnostics
carets for the passed file.
Example:
// test.c
int main(int argc, char **argv)
{
return 0;
}
When test.c is passed to gcc through stdin, the following is printed:
$ cat test.c | gcc -Wall -Wextra -xc -
<stdin>: In function ‘main’:
<stdin>:1:14: warning: unused parameter ‘argc’ [-Wunused-parameter]
<stdin>:1:27: warning: unused parameter ‘argv’ [-Wunused-parameter]
(Note that forcing the -fdiagnostics-show-caret option doesn't change anything)
I would have expected the same output as when the file is passed to gcc as an
argument:
$ gcc -Wall -Wextra test.c
test.c: In function ‘main’:
test.c:1:14: warning: unused parameter ‘argc’ [-Wunused-parameter]
1 | int main(int argc, char **argv)
| ~~~~^~~~
test.c:1:27: warning: unused parameter ‘argv’ [-Wunused-parameter]
1 | int main(int argc, char **argv)
| ~~~~~~~^~~~
