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

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: [e-mail]
          Reporter: [e-mail]
      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 
Date:   Tue Apr 9 09:39:47 2019 +0200

makefiles: Default to building test resource dlls as PE.

Signed-off-by: Alexandre Julliard