https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100343
Bug ID: 100343
Summary: add -Wundefined-inline for inline function is used but
not defined
Product: gcc
Version: 11.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: msebor at gcc dot gnu.org
Target Milestone: ---
Clang provides -Wundefined-inline to control the warning about used inline
functions for which no definition has been provided. GCC doesn't provide any
option to control the warning. This is a request to add -Wundefined-inline
with the same effect as in Clang, both in C++ and in C.
$ (set -x && cat t.C && clang -S -Wall t.C && gcc -S -Wall t.C)
+ cat t.C
inline int f ();
int g () { return f (); }
+ clang -S -Wall t.C
t.C:1:12: warning: inline function 'f' is not defined [-Wundefined-inline]
inline int f ();
^
t.C:2:19: note: used here
int g () { return f (); }
^
1 warning generated.
+ /build/gcc-master/gcc/xgcc -B /build/gcc-master/gcc -S -Wall t.C
t.C:1:12: warning: inline function ‘int f()’ used but never defined
1 | inline int f ();
| ^
