[gambit-list] compiling for arm android on linux

Alexander Shendi Alexander.Shendi at web.de
Sun May 9 17:58:52 EDT 2021


Hi,

I believe you have to use a different C cross compiler to make the executable. I'm assuming you use Linux on x86-64.
On Ubuntu or Debian you'd say something like "sudo apt install gcc make gcc-arm-linux-gnueabi binutils-arm-linux-gnueabi" or similar, depending on your distro.

The cross compiler will be named something like "arm-linux-gnueabi-gcc". Be sure to generate a static binary, because Android has a different libc ("Bionic") than regular Linux.

The "proper" way to do this is to use the Android NDK, but that's more complicated IMHO.

You should then proceed as follows:
$ gsc -c hello.scm
$ gsc -link hello.c
$ arm-linux-gnueabi-gcc -static -o hello hello.c hello_.c \
                                             -lgambit - L/your/gambit/path/lib

Depending on wether your phone is 32 or 64 bits you need to substitute "arm" with "aarch64".
Please note that you at least need a compiled version of the gambit lib for your target platform.

I hope this wasn't too confusing. It might be actually easier to compile  gambit on the phone itself, using either Termux or a Linux chroot.









Am 9. Mai 2021 21:57:58 MESZ schrieb Sonny To <son.c.to at gmail.com>:
>How to compile a simple hello world program on x86 to arm for android?
>
>--- hello.scm ---
>(define wassup (lambda ()
>   (display "hello from scheme\n")))
>
>(wassup)
>---end hello.scm---
>
>
>% gsc -exe -target arm hello.scm
>% adb push ./hello /data/local/tmp
>% adb shell /data/local/tmp/hello
>
>/system/bin/sh: /data/local/tmp/hello: not executable: 64-bit ELF file
>
>% file hello
>hello: ELF 64-bit LSB shared object, x86-64, version 1 (SYSV),
>dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2,
>BuildID[sha1]=64cb09b1432959e8f4f9734d72e99580f6091497, for GNU/Linux
>3.2.0, with debug_info, not stripped
>
>This doesn't like the -target option is generating an ARM binary.
>
>I tried to take a different route by generating C code like this but I
>can't even compile the generated C code on linux x86:
>
>% gsc -c hello.scm
>% gcc hello.c $GAMBIT_HOME/lib/libgambit.a
>$GAMBIT_HOME/lib//libgambitgsc.a $GAMBIT_HOME/lib/libgambitgsi.a
>-I$GAMBIT_HOME/include -lm
>/usr/bin/ld:
>/usr/lib/gcc/x86_64-linux-gnu/9/../../../x86_64-linux-gnu/Scrt1.o:
>in function `_start':
>(.text+0x24): undefined reference to `main'
>/usr/bin/ld: /tmp/ccWylAo9.o: in function `___H_hello_23_':
>hello.c:(.text+0xb4): undefined reference to `___G_wassup'
>/usr/bin/ld: hello.c:(.text+0x108): undefined reference to
>`___G_wassup'
>/usr/bin/ld: hello.c:(.text+0x186): undefined reference to
>`___G_wassup'
>/usr/bin/ld: /tmp/ccWylAo9.o: in function `___setup_mod':
>hello.c:(.text+0x3d4): undefined reference to `___G_hello_23_'
>/usr/bin/ld: /tmp/ccWylAo9.o: in function `___init_mod':
>hello.c:(.text+0x400): undefined reference to `___G_hello_23_'
>/usr/bin/ld: /tmp/ccWylAo9.o: in function `___LNK_hello':
>hello.c:(.text+0x41a): undefined reference to `___S_hello'
>/usr/bin/ld: hello.c:(.text+0x428): undefined reference to
>`___S_hello_23_'
>/usr/bin/ld: /usr/local/gambit/lib/libgambit.a(os_dyn.o): in function
>`___dynamic_load':
>os_dyn.c:(.text+0x1b0): undefined reference to `dlopen'
>/usr/bin/ld: os_dyn.c:(.text+0x1c8): undefined reference to `dlsym'
>/usr/bin/ld: os_dyn.c:(.text+0x2d9): undefined reference to `dlerror'
>/usr/bin/ld: os_dyn.c:(.text+0x305): undefined reference to `dlclose'
>/usr/bin/ld: /usr/local/gambit/lib/libgambit.a(os_dyn.o): in function
>`___cleanup_dyn_module':
>os_dyn.c:(.text+0x4db): undefined reference to `dlclose'
>/usr/bin/ld: /usr/local/gambit/lib/libgambit.a(os_io.o): in function
>`___device_stream_setup_from_process':
>os_io.c:(.text+0x3592): undefined reference to `openpty'
>collect2: error: ld returned 1 exit status
>
>
>How do I compile the generated C code?
>
>Thanks for any help
>
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