Error cross-compiling openconnect-8.08 for android

Question

When i follow instructions here, i get this error when running latest instruction that is "make":

make[1]: Entering directory '/home/fasegiar/Downloads/openconnect-8.08'
  CC       libopenconnect_la-ssl.lo
In file included from ssl.c:41:
In file included from ./openconnect-internal.h:102:
In file included from /usr/include/libxml2/libxml/tree.h:1307:
In file included from /usr/include/libxml2/libxml/xmlmemory.h:218:
In file included from /usr/include/libxml2/libxml/threads.h:35:
In file included from /usr/include/libxml2/libxml/globals.h:18:
In file included from /usr/include/libxml2/libxml/parser.h:810:
/usr/include/libxml2/libxml/encoding.h:31:10: fatal error: 'unicode/ucnv.h' file not found
#include <unicode/ucnv.h>
         ^~~~~~~~~~~~~~~~
1 error generated.
Makefile:1037: recipe for target 'libopenconnect_la-ssl.lo' failed
make[1]: *** [libopenconnect_la-ssl.lo] Error 1
make[1]: Leaving directory '/home/fasegiar/Downloads/openconnect-8.08'
Makefile:749: recipe for target 'all' failed
make: *** [all] Error 2

The TARGET that i use is: armv7a-linux-androideabi

My TOOLCHAIN is: /home/fasegiar/Documents/android-ndk-r21/toolchains/llvm/prebuilt/linux-x86_64

Here is the output of the config.log after ./configure call

Please show the full output of your configure and make call. "Make error 1" is a useless diagnostic. — Botje
– Botje, Commented Apr 20, 2020 at 7:04
Is that the full output of calling configure and make? I doubt that. — Botje
– Botje, Commented Apr 20, 2020 at 12:19
Edit your question. Please add the FULL INVOCATION AND OUTPUT OF CONFIGURE AND MAKE not just the last few lines. — Botje
– Botje, Commented Apr 20, 2020 at 13:00

Botje · Accepted Answer · 2020-04-20 14:13:48Z

3

From the snippet you posted I can already tell you this is not going to work. When cross-compiling you need to cross-compile all dependencies first for your target platform (ie Android) and then tell the configure script where to find the installed dependencies. For openconnect the dependencies are:

Required:

libxml2 (this in turn requires libicu, as your error points out)

zlib (this is bundled)

Either OpenSSL or GnuTLS (v3.2.10+) (see NDKPorts)

Optional:

p11-kit (for PKCS#11 support)

libp11 (also needed for PKCS#11 support if using OpenSSL)

libproxy

trousers (for TPMv1 support if using GnuTLS)

libtasn1 and either tss2-esys or IBM's TPM 2.0 TSS. (for TPMv2 support if using GnuTLS)

libstoken (for SecurID software token support)

libpskc (for RFC6030 PSKC file storage of HOTP/TOTP keys)

libpcsclite (for Yubikey hardware HOTP/HOTP support)

edited Apr 20, 2020 at 14:13

answered Apr 20, 2020 at 13:55

Botje

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7 Comments

Armel Gildas Fagbedji Over a year ago

Hi @Botje, i think that is what instructions under android/ folder do. But i run into this error

Botje Over a year ago

"Note that on Android, unlike Linux, there are no separate libpthread libraries. That functionality is included directly in libc, which does not need to be explicitly linked against." As for iconv, you will need to figure out which component drags it in.

Armel Gildas Fagbedji Over a year ago

Is that means that I need to install a libc library on my machine?

Botje Over a year ago

It means you may not specify -lpthread when linking code for android.

Botje Over a year ago

You need to either build iconv or tell whatever dependency that needs it to not use it.

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