1.40.0 build failed using eclipse 3.7

[ycat3]

I check out PMS3 1.40.0 code and I encounter the build problem using eclipse 3.7 ant, and jdk1.7.0.

Error messages are following.
Any suggestion are appreciated.
Cheers,

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Buildfile: C:\Program Files\Java\workspace\PMS3\build.xml
depends:
clean:
[delete] Deleting directory C:\Program Files\Java\workspace\PMS3\classes
PMS:
[mkdir] Created dir: C:\Program Files\Java\workspace\PMS3\classes

BUILD FAILED
C:\Program Files\Java\workspace\PMS3\build.xml:31: java.lang.UnsupportedClassVersionError: com/sun/tools/javac/Main : Unsupported major.minor version 51.0

Total time: 3 seconds
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[Raptor399]

Might have to do with compiling against Java 7. I thought there were problems with that but haven't delved into it yet, so I'm not sure.

[ycat3]

I switched to jdk1.6.0_27 from jdk1.7.0, then pms 1.40.0 build is successful.
Thanks a lot !