Follow-up Comment #3, bug #51237 (project make):
I have created test application, which detaches console and sleeps for 1000
seconds:
#include <windows.h>
int main(int argc, char *argv[]) {
FreeConsole();
Sleep(1000000);
return 0;
}
And tested it with this makefile:
# run make -j -O, then press Ctrl+C
all: a b c d
CMD := C:\test.exe
a:;$(CMD)
b:;$(CMD)
c:;$(CMD)
d:;$(CMD)
.PHONY: all a b c d
I see next behaviors of original/pached make on Ctrl+C.
1) Original make-4.2.1.
- Main thread is suspended in WaitForMultipleObjects.
- Ctrl+C handler thread waits for one of 4 sub-processes in
WaitForMultipleObjects.
2) Patched make-4.2.1.
- Main thread waits for one of 4 sub-processes in WaitForMultipleObjects.
- Ctrl+C handler thread waits for Main thread in WaitForSingleObject.
Both makes hang for 1000 seconds.
...
For this test, it is possible to fix Ctrl+C handler in original make, so it
will kill sub-processes.
(replace SIGTERM with SIGINT in fatal_error_signal, because "The SIGILL and
SIGTERM signals are not generated under Windows. They are included for ANSI
compatibility").
And this is works, but only top child processes get killed:
If I use
CMD := cmd.exe /c "C:\test.exe"
Then by Ctrl+C, make kills only cmd.exe, and C:\test.exe continues to live.
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