[Bug 46993] New: ntoskrnl.exe tests don't compile when using -O0

[wine-bugs at winehq.org]

https://bugs.winehq.org/show_bug.cgi?id=46993

            Bug ID: 46993
           Summary: ntoskrnl.exe tests don't compile when using -O0
           Product: Wine
           Version: unspecified
          Hardware: x86
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: -unknown
          Assignee: wine-bugs at winehq.org
          Reporter: dark.shadow4 at web.de
      Distribution: ---

Error:

##################
/usr/lib/gcc/i686-w64-mingw32/8.3.0/../../../../i686-w64-mingw32/bin/ld:
driver.cross.o: in function `kvprintf':
/home/fabian/Programming/Wine/wine/dlls/ntoskrnl.exe/tests/../../../../wine-git/dlls/ntoskrnl.exe/tests/driver.c:64:
undefined reference to `strlen'
/usr/lib/gcc/i686-w64-mingw32/8.3.0/../../../../i686-w64-mingw32/bin/ld:
driver.cross.o: in function `test_resource':
/home/fabian/Programming/Wine/wine/dlls/ntoskrnl.exe/tests/../../../../wine-git/dlls/ntoskrnl.exe/tests/driver.c:946:
undefined reference to `memset'
##################

Only happens in -O0, otherwise the compiler seems to optimize away the
functions.

Bisected to
commit 0022af881e567093621b20d29794503be9400e0b
Author: Alexandre Julliard <julliard at winehq.org>
Date:   Tue Apr 9 09:39:47 2019 +0200

    makefiles: Default to building test resource dlls as PE.

    Signed-off-by: Alexandre Julliard <julliard at winehq.org>

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