LibreOffice Build Error

Hi,
for several days I am building LibreOffice on my mac (Yosemite 10.10.3) without never succeeded. In 
my last test I modified the file autogen.input with these options for Android build:

--with-distro=LibreOfficeAndroid
--with-android-sdk=/Applications/adt-bundle-mac-x86_64-20140702/sdk
--with-parallelism

but I always get this error:

Updated project.properties
Updated local.properties
Updated file ../../Bootstrap/../AppCompat-v7/proguard-project.txt
hb-icu.cc:333: error: undefined reference to 'unorm_normalize_55'
hb-icu.cc:339: error: undefined reference to 'u_strToUTF32_55'
hb-icu.cc:228: error: undefined reference to 'unorm2_getRawDecomposition_55'
hb-icu.cc:231: error: undefined reference to 'u_countChar32_55'
hb-icu.cc:179: error: undefined reference to 'unorm2_composePair_55'
hb-icu.cc:149: error: undefined reference to 'u_charMirror_55'
hb-icu.cc:98: error: undefined reference to 'u_getIntPropertyValue_55'
hb-icu.cc:79: error: undefined reference to 'u_getIntPropertyValue_55'
hb-icu.cc:71: error: undefined reference to 'u_getCombiningClass_55'
hb-icu.cc:48: error: undefined reference to 'uscript_getShortName_55'
hb-icu.cc:158: error: undefined reference to 'uscript_getScript_55'
hb-icu.cc:366: error: undefined reference to 'unorm2_getNFCInstance_55'
collect2: error: ld returned 1 exit status
make[2]: *** [obj/local/armeabi-v7a/liblo-native-code.so] Error 1
make[1]: *** 
[/Volumes/Elements/LibreOffice/libreoffice/workdir/CustomTarget/android/experimental/LOAndroid3/done]
 Error 2
make: *** [build] Error 2


What can I do? Thanks a lot for the help.

Massimiliano