[strongSwan] Compilation failure for android frond end

[DreamDreams]

Dear list,

I'm trying to compile android client from source following this
instruction<http://wiki.strongswan.org/projects/strongswan/wiki/AndroidVPNClient>.
But when I ran ndk-build I got this error message:

jni/strongswan/src/libstrongswan/plugins/openssl/openssl_pkcs7.c:24:25:
fatal error: openssl/cms.h: No such file or directory.

Any idea?

Thanks
Andy
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