Re: Broken make dependency somewhere near win32ver.o?

Hi,

On 2022-03-22 15:47:13 +1300, Thomas Munro wrote:
> Here's a strange one-off failure seen on CI[1], in the
> CompilerWarnings task where we check that mingw cross-compile works:
>
> [10:48:29.045] time make -s -j${BUILD_JOBS} world-bin
> [10:48:38.705] x86_64-w64-mingw32-gcc: error: win32ver.o: No such file
> or directory
> [10:48:38.705] make[3]: *** [Makefile:44: pg_dumpall] Error 1
> [10:48:38.705] make[3]: *** Waiting for unfinished jobs....
> [10:48:38.709] make[2]: *** [Makefile:43: all-pg_dump-recurse] Error 2
> [10:48:38.709] make[2]: *** Waiting for unfinished jobs....
> [10:48:38.918] make[1]: *** [Makefile:42: all-bin-recurse] Error 2
> [10:48:38.918] make: *** [GNUmakefile:21: world-bin-src-recurse] Error 2
>
> I guess this implies a dependency problem somewhere around
> src/makefiles/Makefile.win32 but I'm not familiar with how that .rc
> stuff is supposed to work and I figured I'd mention it here in case
> it's obvious to someone else...

Oh. I think I figured out how to reproduce it reliably:

make -s clean
make -j pg_dumpall -C src/bin/pg_dump/
...
x86_64-w64-mingw32-gcc: error: win32ver.o: No such file or directory

The problem looks to be that pg_dumpall doesn't have a dependency on OBJs,
which in turn is what contains the dependency on WIN32RES, which in turn
contains win32ver.o. So the build succeeds if pg_dump/restores's dependencies
are built first, but not if pg_dumpall starts to be built before that...

Seems we just need to add $(WIN32RES) to pg_dumpall: ?

Greetings,

Andres Freund