Multiple target patterns error for CMake about openj9 HOT 6 OPEN

@keithc-ca any ideas?

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I've seen this myself and wasn't quite sure why it didn't happen in jenkins builds. I narrowed it down to management of dependencies for .nasm files. I'm updating my cmake version, perhaps it's fixed already.

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Related to https://github.ibm.com/runtimes/infrastructure/issues/8822

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cmake version 3.28.3 didn't fare any better.

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@keithc-ca ,
cmake version in most of our build machines are 3.14.5. And personally when I encountered this error last time rolling down cmake to 3.20.1 did the trick.

What do you think is different in higher cmake versions that might be causing this issue?

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Older versions of cmake don't automatically track dependencies for .nasm files. It seems the new tracking doesn't play nicely with our use of fixpath.sh.

For example, consider AMD64CompressString.nasm; nasm creates a .d file which says:

runtime/compiler/CMakeFiles/j9jit.dir/x/amd64/runtime/AMD64CompressString.nasm.obj : \
  c:\space\jdk21\openj9\runtime\compiler\x\amd64\runtime\AMD64CompressString.nasm \
  c:\space\jdk21\build\normal\vm\runtime\oti\jilconsts.inc \
  c:\space\jdk21\openj9\runtime\compiler\x\amd64\runtime\AMD64CompressString.inc

Then cmake translates this the following rule in runtime/compiler/CMakeFiles/j9jit.dir/compiler_depend.make:

runtime/compiler/CMakeFiles/j9jit.dir/x/amd64/runtime/AMD64CompressString.nasm.obj: /cygdrive/c/space/jdk21/openj9/runtime/compiler/x/amd64/runtime/AMD64CompressString.nasm \
  runtime/compiler/c:/space/jdk21/build/normal/vm/runtime/oti/jilconsts.inc \
  runtime/compiler/c:/space/jdk21/openj9/runtime/compiler/x/amd64/runtime/AMD64CompressString.inc \
  runtime/compiler/c:/space/jdk21/openj9/runtime/compiler/x/amd64/runtime/AMD64CompressString.nasm

It seems that cmake's preference for using relative paths doesn't work so well.

My plan is to just disable automatic dependency management for .nasm files on Windows.

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