After this change went into the hotspot-rt forest:

changeset: 3526:0d8e265ba727
user: dcubed
date: Fri Aug 03 18:34:28 2012 -0700
summary: 7181175: Enable builds on Windows with MinGW/MSYS

Users trying to build with hotspot/make/windows/create.bat get a failure, as follows:

$ hg update -r 3526:0d8e265ba727
4 files updated, 0 files merged, 0 files removed, 0 files unresolved


$ cd c:\jdk8\TBD\hotspot\make\windows
$ create.bat C:/PROGRA~1/Java/JDK17~1.0_0

[...]
        rm -f ad_x86_32.cpp ad_x86_32.hpp ad_x86_32_clone.cpp ad_x86_32_expand.cpp ad_x86_32_format.cpp ad_x86_32_gen.cpp ad_x86_32_misc.cpp ad_x86_32_peephole.cpp ad_x86_32_pipeline.cpp adGlobals_x86_32.hpp dfa_x86_32.cpp
        if exist c:\jdk8\TBD\hotspot\build\vs-i486\tiered\generated\adfiles rmdir /s /q c:\jdk8\TBD\hotspot\build\vs-i486\tiered\generated\adfiles
        mkdir c:\jdk8\TBD\hotspot\build\vs-i486\tiered\generated\adfiles
        adlc -q -T -U_LP64 x86_32.ad
**************************************************************
***** WARNING: ASSERT is undefined, assertions disabled. *****
**************************************************************
        mv ad_x86_32.cpp ad_x86_32.hpp ad_x86_32_clone.cpp ad_x86_32_expand.cpp ad_x86_32_format.cpp ad_x86_32_gen.cpp ad_x86_32_misc.cpp ad_x86_32_peephole.cpp ad_x86_32_pipeline.cpp adGlobals_x86_32.hpp dfa_x86_32.cpp c:\jdk8\TBD\hotspot\build\vs-i486\tiered\generated\adfiles/
        "C:/PROGRA~1/Java/JDK17~1.0_0\bin\javac" -g -encoding ascii -source 6 -target 6 -d c:\jdk8\TBD\hotspot\build\vs-i486\tiered\generated\jvmtifiles c:\jdk8\TBD\hotspot\/src/share/vm/prims/jvmtiGen.java
warning: [options] bootstrap class path not set in conjunction with -source 1.6
1 warning
Generating c:\jdk8\TBD\hotspouild?s-i486\tiered\generated\jvmtifiles/jvmtiEnv.hpp
Generating c:\jdk8\TBD\hotspouild?s-i486\tiered\generated\jvmtifiles/jvmtiEnter.cpp
Generating c:\jdk8\TBD\hotspouild?s-i486\tiered\generated\jvmtifiles/jvmtiEnterTrace.cpp
warning: [options] bootstrap class path not set in conjunction with -source 1.6
1 warning
Generating c:\jdk8\TBD\hotspouild?s-i486\tiered\generated\jvmtifiles/jvmtiEnvRecommended.cpp
Generating c:\jdk8\TBD\hotspouild?s-i486\tiered\generated\jvmtifiles/bytecodeInterpreterWithChecks.cpp
Generating c:\jdk8\TBD\hotspouild?s-i486\tiered\generated\jvmtifiles/jvmti.h
-- core --
        "C:/PROGRA~1/Java/JDK17~1.0_0\bin\javac" -g -encoding ascii -source 6 -target 6 -d c:\jdk8\TBD\hotspot\build\vs-i486\core\generated\jvmtifiles c:\jdk8\TBD\hotspot\/src/share/vm/prims/jvmtiGen.java
warning: [options] bootstrap class path not set in conjunction with -source 1.6
1 warning
Generating c:\jdk8\TBD\hotspouild?s-i486Generating c:\jdk8\TBD\hotspouild?s-i486
Generating c:\jdk8\TBD\hotspouild?s-i486warning: [options] bootstrap class path
not set in conjunction with -source 1.6
1 warning
Generating c:\jdk8\TBD\hotspouild?s-i486Generating c:\jdk8\TBD\hotspouild?s-i486
Generating c:\jdk8\TBD\hotspouild?s-i486-- kernel --
        "C:/PROGRA~1/Java/JDK17~1.0_0\bin\javac" -g -encoding ascii -source 6 -target 6 -d c:\jdk8\TBD\hotspot\build\vs-i486\kernel\generated\jvmtifiles c:\jdk8\TBD\hotspot\/src/share/vm/prims/jvmtiGen.java
warning: [options] bootstrap class path not set in conjunction with -source 1.6
1 warning
Generating c:\jdk8\TBD\hotspouild?s-i486\kernel\generated\jvmtifiles/jvmtiEnv.hpp
Generating c:\jdk8\TBD\hotspouild?s-i486\kernel\generated\jvmtifiles/jvmtiEnter.cpp
Generating c:\jdk8\TBD\hotspouild?s-i486\kernel\generated\jvmtifiles/jvmtiEnterTrace.cpp
warning: [options] bootstrap class path not set in conjunction with -source 1.6
1 warning
Generating c:\jdk8\TBD\hotspouild?s-i486\kernel\generated\jvmtifiles/jvmtiEnvRecommended.cpp
Generating c:\jdk8\TBD\hotspouild?s-i486\kernel\generated\jvmtifiles/bytecodeInterpreterWithChecks.cpp
Generating c:\jdk8\TBD\hotspouild?s-i486\kernel\generated\jvmtifiles/jvmti.h
warning: [options] bootstrap class path not set in conjunction with -source 1.6
Note: Some input files use unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
1 warning
Error: Could not find or load main class .classes
NMAKE : fatal error U1077: 'C:/PROGRA~1/Java/JDK17~1.0_0\bin\java.EXE' : return
code '0x1'
Stop.