https://bugs.llvm.org/show_bug.cgi?id=45016
Bug ID: 45016
Summary: -Wimplicit-int doesn't fire in -std=gnu90 mode
Product: clang
Version: trunk
Hardware: All
OS: All
Status: NEW
Severity: normal
Priority: P
Component: Frontend
Assignee: unassignedclangb...@nondot.org
Reporter: h...@chromium.org
CC: llvm-bugs@lists.llvm.org, neeil...@live.com,
richard-l...@metafoo.co.uk
For example:
$ cat /tmp/a.c
int f(void) {
const x = 42;
return x;
}
$ clang -c -std=gnu90 -Wimplicit-int /tmp/a.c
(no warning)
$ clang -c -Wimplicit-int /tmp/a.c
/tmp/a.c:2:9: warning: type specifier missing, defaults to 'int'
[-Wimplicit-int]
const x = 42;
~~~~~ ^
1 warning generated.
GCC does not have this issue:
$ gcc -c -std=gnu90 -Wimplicit-int /tmp/a.c
/tmp/a.c: In function ‘f’:
/tmp/a.c:2:9: warning: type defaults to ‘int’ in declaration of ‘x’
[-Wimplicit-int]
2 | const x = 42;
| ^
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