Android Building Error

Hi, 
I'm trying to build LO project for Android on Linux machine (Debian 8).

I followed all wiki instructions and i finally building LO for Linux but when i try to build 
Android apk i have some problems.

If i launch make in the root dir with autogen.input sets to --with-distro=LibreOfficeAndroid i have 
this report:

Making all in src
  CC     fcxml.lo
libtool: compile:  
/home/bayway/Documenti/libreoffice/external/android-ndk/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/arm-linux-androideabi-gcc
 -mthumb -march=armv7-a -mfloat-abi=softfp -mfpu=neon -Wl,--fix-cortex-a8 -ffunction-sections 
-fdata-sections 
-L/home/bayway/Documenti/libreoffice/external/android-ndk/sources/cxx-stl/gnu-libstdc++/4.9/libs/armeabi-v7a
 --sysroot=/home/bayway/Documenti/libreoffice/external/android-ndk/platforms/android-15/arch-arm 
-Wno-psabi -fuse-ld=gold -DHAVE_CONFIG_H -I. -I.. -I.. -I../src 
-I/home/bayway/Documenti/libreoffice/workdir/UnpackedTarball/freetype/instdir/include/freetype2 
-I/home/bayway/Documenti/libreoffice/workdir/UnpackedTarball/freetype/instdir/include 
-I/usr/include/libxml2 -Wall -Wpointer-arith -Wstrict-prototypes -Wmissing-prototypes 
-Wmissing-declarations -Wnested-externs -fno-strict-aliasing 
-DFC_CACHEDIR=\"/usr/local/var/cache/fontconfig\" -DFONTCONFIG_PATH=\"/usr/local/etc/fonts\" 
-DHAVE_GCC_VISIBILITY_FEATURE -fvisibility=hidden -MT fcxml.lo -MD -MP -MF .deps/fcxml.Tpo -c 
fcxml.c -o fcxml.o
In file included from /usr/include/libxml2/libxml/parser.h:810:0,
                 from fcxml.c:32:
/usr/include/libxml2/libxml/encoding.h:28:19: fatal error: iconv.h: No such file or directory
 #include <iconv.h>
                   ^
compilation terminated.
Makefile:468: set di istruzioni per l'obiettivo "fcxml.lo" non riuscito
make[5]: *** [fcxml.lo] Errore 1
Makefile:354: set di istruzioni per l'obiettivo "all" non riuscito
make[4]: *** [all] Errore 2
Makefile:447: set di istruzioni per l'obiettivo "all-recursive" non riuscito
make[3]: *** [all-recursive] Errore 1
Makefile:330: set di istruzioni per l'obiettivo "all" non riuscito
make[2]: *** [all] Errore 2
/home/bayway/Documenti/libreoffice/external/fontconfig/ExternalProject_fontconfig.mk:22: set di 
istruzioni per l'obiettivo 
"/home/bayway/Documenti/libreoffice/workdir/ExternalProject/fontconfig/build" non riuscito
make[1]: *** [/home/bayway/Documenti/libreoffice/workdir/ExternalProject/fontconfig/build] Errore 1
Makefile:247: set di istruzioni per l'obiettivo "build" non riuscito
make: *** [build] Errore 2

Other side if i launch make in android dir i have this one:

Updated local.properties
Updated file ../../Bootstrap/../AppCompat-v7/proguard-project.txt
make[1]: ***  Nessuna regola per generare l'obiettivo 
"/home/bayway/Documenti/libreoffice/workdir/UnpackedTarball/curl/lib/.libs/*.a", necessario per 
"obj/local/armeabi-v7a/liblo-native-code.so".  Arresto.
make[1]: uscita dalla directory "/home/bayway/Documenti/libreoffice/android/experimental/LOAndroid3"
/home/bayway/Documenti/libreoffice/android/CustomTarget_lo_android.mk:17: set di istruzioni per 
l'obiettivo 
"/home/bayway/Documenti/libreoffice/workdir/CustomTarget/android/experimental/LOAndroid3/done" non 
riuscito
make: *** 
[/home/bayway/Documenti/libreoffice/workdir/CustomTarget/android/experimental/LOAndroid3/done] 
Errore 2

What can i do? Thanks a lot.
Massimiliano