LLVM ERROR: Error: Unable to launch the Java Virtual Machine

Question

Having expanded the kit and followed directions to compile the samples
On Windows 7, the complaint is
     LLVM ERROR: Error: Unable to launch the Java Virtual Machine.
I have about a dozen JVMs installed, the default is 64 bit java 1.8_05
make FLASCC="/cygdrive/c/crossbridge/sdk" FLEX="C:\Program Files\Adobe\Adobe Flash Builder 4.7 (64 Bit)\sdks\4.6.0"
make[2]: Entering directory `/cygdrive/c/crossbridge/samples/01_HelloWorld'
-------- Sample 1 --------
First let's compile it as a projector:
"/cygdrive/c/crossbridge/sdk/usr/bin/gcc" -Werror -Wno-write-strings -Wno-trigraphs hello.c -o hello.exe
cc1: error in backend: Failed to run /cygdrive/c/crossbridge/sdk/usr/bin/../../usr/bin/llc with args: -jvm=C:\windows\sy
stem32\java -filetype=obj C:\crossbridge\cygwin\tmp\ccb4oprU.o -o C:\crossbridge\cygwin\tmp\ccb4oprU.o -jvmopt -Xmx1500M
Error:
LLVM ERROR: Error: Unable to launch the Java Virtual Machine.
This usually means you have a 32bit JVM installed or have set your Java heap size too large.
Try lowering the Java heap size by passing "-jvmopt=-Xmx1G" to gcc/g++.
Stack dump:
0.      Program arguments: C:\crossbridge\sdk\usr\bin\llc.exe -jvm=C:\windows\system32\java -filetype=obj C:\crossbridge
\cygwin\tmp\ccb4oprU.o -o C:\crossbridge\cygwin\tmp\ccb4oprU.o -jvmopt -Xmx1500M
1.      Running pass 'Function Pass Manager' on module 'C:\crossbridge\cygwin\tmp\ccb4oprU.o'.

Answer 1

After the above, the "samples" build still failed on sample 5.
My explanation is that my typical devlopers path is full of all kinds of stuff, including perl,
msvc, some version or other of cygwin, some random unix command tools, and so on.
I eventually fixed the rest of the samples build process by cleaning up my path.
In run.bat, before the path modification
# set a minimal path to avoid contamination of the environment with unexpected programs
# note this includes the JDK path we want to use
set path=C:\java\jdk1.8.0\bin;C:\windows\system32;C:\windows;C:\windows\System32\Wbem;