https://bugs.llvm.org/show_bug.cgi?id=40211
Bug ID: 40211
Summary: c11: Accepts invalid program with function having
internal linkage used but not defined.
Product: clang
Version: trunk
Hardware: All
OS: All
Status: NEW
Severity: normal
Priority: P
Component: -New Bugs
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected],
[email protected], [email protected]
Test case (prog.c):
static void f();
int main()
{
f;
}
Compilation command line:
clang prog.c -Wall -Wextra -std=c11 -pedantic-errors
Observed behaviour:
No error message outputed. Only warning messages outputed.
Expected bebehaviour:
An error message outputed.
The program is invalid by 6.9/3:
"... Moreover, if an identifier declared with internal linkage is used in
an
expression (other than as a part of the operand of a sizeof or _Alignof
operator whose result is an integer constant), there shall be exactly one
external definition for the identifier in the translation unit."
Note:
GCC gives the expected error message.
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