https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78036
Bug ID: 78036
Summary: -MM suppresses error detection
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: pskocik at gmail dot com
Target Milestone: ---
Example:
touch in.h
gcc -x c -include in.h - -MD -MF /dev/stdout <<<'int main(){x; return 42;}
fails as it should.
Changing -MD to -MM causes the failure to go undetected (no stderr output, no
nonzero exit status), making it look as if the compilation succeeded.
(Notes: Changing -MF /dev/stdout to -MF regular_file makes no difference.
Clang has this behavior too)
