bug#9192: Cross-compile for ARM

bug#9192: Cross-compile for ARM

[Toon Claes]

I was trying to cross-compile emacs for ARM (don't ask me why).
But got an error during 'make' (see output below FIRST RUN).

So it's for sure 'test-distrub' was build for ARM, while it is trying to run on i686.

On the second run (just, ran 'make again), I got a similar error on 'prefix-args'.
But for some reason the 'test-distrub' error is gone (probably because 'make' thinks it is already finished.

So I have to compile them with the host compiler (i686).
But I'm not sure how to implement this properly.


Also I would like to get rid of the warning: "LIB_GCC" redefined


Regards,
Toon


-------------- FIRST RUN -------------------
system call: make
cd lib-src; make all                            \
          CC='arm-none-linux-gnueabi-gcc' CFLAGS='-DHAVE_STRERROR' CPPFLAGS='-D_BSD_SOURCE  ' \
          LDFLAGS='-L/home/toon/sandbox/os/Sync/imx31d/Archives -L/home/toon/sandbox/os/Sync/imx31d/Libs -Wl,-znocombreloc ' MAKE='make'
make[1]: Entering directory `/home/toon/sandbox/os/Build/imx31d/emacs-23.3/lib-src'
arm-none-linux-gnueabi-gcc -D_BSD_SOURCE -DHAVE_CONFIG_H -I. -I../src -I/home/toon/sandbox/os/Build/imx31d/emacs-23.3/lib-src -I/home/toon/sandbox/os/Build/imx31d/emacs-23.3/lib-src/../src -L/home/toon/sandbox/os/Sync/imx31d/Archives -L/home/toon/sandbox/os/Sync/imx31d/Libs -Wl,-znocombreloc  -D_BSD_SOURCE   -DHAVE_STRERROR -o test-distrib /home/toon/sandbox/os/Build/imx31d/emacs-23.3/lib-src/test-distrib.c
In file included from ../src/config.h:1075,
                 from /home/toon/sandbox/os/Build/imx31d/emacs-23.3/lib-src/test-distrib.c:23:
../src/m/arm.h:42:1: warning: "LIB_GCC" redefined
In file included from ../src/config.h:1074,
                 from /home/toon/sandbox/os/Build/imx31d/emacs-23.3/lib-src/test-distrib.c:23:
../src/s/gnu-linux.h:200:1: warning: this is the location of the previous definition
./test-distrib /home/toon/sandbox/os/Build/imx31d/emacs-23.3/lib-src/testfile
./test-distrib:2: no such file or directory: ^@^@^@؃^@^@\M-l^@^@^@^R^@^@^@^@^@^@\M-d\M-^C^@^@,^@^@^@^R^@^@^@Q^@^@^@\M-p\M-^C^@^@\M-h^@^@^@^R^@^@^@/^@^@^@\M-|\M-^C^@^@d^@^@^@^R^@^@^@h^@^@^@^H\M-^D^@^@d^@^@^@^R^@^@^@^A^@^@^@^@^@^@^@^@^@^@^@ ^@^@^@^@__gmon_start__^@libc.so.6^@perror^@abort^@fprintf^@read^@strncmp^@open64^@strcmp^@stderr^@exit^@__libc_start_main^@close^@GLIBC_2.4^@^@^@^B^@^B^@^B^@^B^@^B^@^B^@^B^@^B^@^B^@^B^@^B^@^@^@^@^@^A^@^A^@^P^@^@^@^P^@^@^@^@^@^@^@^Tii^M^@^@^B^@n^@^@^@^@^@^@^@<\t^A^@^U^L^@^@(\n^A^@^T^F^@^@^T\t^A^@^V^A^@^@^X\t^A^@^V^B^@^@^\\t^A^@^V^C^@^@ \t^A^@^V^D^@^@$\t^A^@^V^E^@^@(\t^A^@^V^G^@^@,\t^A^@^V^H^@^@0\t^A^@^V\t^@^@4\t^A^@^V\n^@^@8\t^A^@^V^K^@^@^D\M-`-\M-e^D\M-PM\M-b2^@^@\M-k^DЍ\M-b^@\M-^@\M-=\M-h^D\M-`-\M-e^D\M-`\M-^_\M-e^N\M-`\M-^O\M-`^H\M-p\M->\M-ep\M-^E^@^@^@Ə\M-b^Hʌ\M-bp\M-u\M-<\M-e^@Ə\M-b^Hʌ\M-bh\M-u\M-<\M-e^@Ə\M-b^Hʌ\M-b`\M-u\M-<\M-e^@Ə\M-b^Hʌ\M-bX\M-u\M-<\M-e^@Ə\M-b^Hʌ\M-bP\M-u\M-<\M-e^@Ə\M-b^Hʌ\M-bH\M-u\M-<\M-e^@Ə\M-b^Hʌ\M-b@\M-u\M-<\M-e^@Ə\M-b^Hʌ\M-b8\M-u\M-<\M-e^@Ə\M-b^Hʌ\M-b0\M-u\M-<\M-e^@Ə\M-b^Hʌ\M-b(\M-u\M-<\M-e$\M-@\M-^_\M-e^@\M-0\M- \M-c^D^P\M-^]\M-d^M \M- \M-a^D -\M-e^D^@-\M-e^P^@\M-^_\M-e^P0\M-^_\M-e^D\M-@-\M-e\M-]\M-^?\M-^?\M-k\M-V\M-^?\M-^?\M-kІ^@^@t\M-^E^@^@Ԇ^@^@^@D-\M-i^X\M- \M-^_\M-e\n\M- \M-^O\M-`^T0\M-^_\M-e^C0\M-^Z\M-g^@^@S\M-c^@\M-^D\M-=^H3\M-^?/\M-a^@\M-^D\M-=謄^@^@4^@^@^@^P \M-^_\M-e^@0\M-R\M-e^@^@S\M-c^A0\M-^C^B^@0\M-B^E^^\M-^?/\M-a,\n^A^@^D\M-`-\M-e$^@\M-^_\M-e^D\M-PM\M-b^@0\M-^P\M-e^\ \M-^_\M-e^@^@S\M-c^B^@^@\n^@^@R\M-c^@^@^@\n2\M-^?/\M-a^DЍ\M-b^@\M-^@\M-=\M-h^\^H^A^@^@^@^@^@^M\M-@\M- \M-a^@\M-X-\M-i^D\M-0L\M-b^X\M-PM\M-b^X^@^K\M-e^\^P^K\M-e  ^K\M-e^@0\M- \M-c^P0^K\M-e^P0^[\M-e^C \M- \M-a^\0^[\M-e^C^P\M-^B\M-`  ^[\M-e^P0^[\M-e^B0c\M-`^X^@^[\M-e^C \M- \M-a\M-8\M-^?\M-^?\M-k^@0\M- \M-a^T0^K\M-e^T0^[\M-e^@^@S\M-c^B^@^@^Z^P0^[\M-e$0^K\M-e\n^@^@\M-j^T0^[\M-e^@^@S\M-c^B^@^@\M-*^T0^[\M-e$0^K\M-e^D^@^@\M-j^P0^[\M-e^T ^[\M-e^B0\M-^C\M-`^P0^K\M-e\M-b\M-^?\M-^?\M-j$0^[\M-e^C^@\M- \M-a^L\M-PK\M-b^@\M-(\M-^]\M-h^M\M-@\M- \M-a^@\M-X-\M-i^D\M-0L\M-b^P\M-PM\M-b^X^@^K\M-e^\^P^K\M-e^X0^[\M-e^B^@S\M-c\t^@^@\n^X1\M-^_\M-e^@ \M-^S\M-e^\0^[\M-e^@0\M-^S\M-e^B^@\M- \M-a^H^Q\M-^_\M-e^C \M- \M-a\M-\n\M-^?\M-^?\M-k^A^@\M- \M-c\M-^K\M-^?\M-^?\M-k^\0^[\M-e^D0\M-^C\M-b^@0\M-^S\M-e^C^@\M- \M-a^@^P\M- \M-c^?\M-^?\M-^?\M-k^@0\M- \M-a^P0^K\M-e^P0^[\M-e^@^@S\M-c^F^@^@\M-*^\0^[\M-e^D0\M-^C\M-b^@0\M-^S\M-e^C^@\M- \M-ar\M-^?\M-^?\M-k^A^@\M- \M-cy\M-^?\M-^?\M-k^P^@^[\M-e\M-,^P\M-^_\M-es \M- \M-c\M-,\M-^?\M-^?\M-k^@0\M- \M-as^@S\M-c^S^@^@^Z\M-^T^@\M-^_\M-e\M-^T^P\M-^_\M-ec\M-^?\M-^?\M-k^@0\M- \M-a^@^@S\M-c^M^@^@^Z^P^@^[\M-ex^P\M-^_\M-el \M- \M-c\M-^_\M-^?\M-^?\M-k^@0\M- \M-ak^@S\M-c^F^@^@^Z`^@\M-^_\M-ed^P\M-^_\M-ek \M- \M-cO\M-^?\M-^?\M-k^@0\M- \M-a^@^@S\M-c\n^@^@\n<0\M-^_\M-e^@ \M-^S\M-e^\0^[\M-e^D0\M-^C\M-b^@0\M-^S\M-e^B^@\M- \M-a8^P\M-^_\M-e^C \M- \M-aR\M-^?\M-^?\M-k^A^@\M- \M-cS\M-^?\M-^?\M-k^P^@^[\M-eW\M-^?\M-^?\M-k^@0\M- \M-c^C^@\M- \M-a^L\M-PK\M-b^@\M-(\M-^]\M-h(\n^A^@T\M-^G^@^@-\n^A^@H\t^A^@\M-<\t^A^@h\M-^G^@^@^^\M-^?/\M-a\M-pG-\M-iT\M- \M-^_\M-e\n\M- \M-^O\M-`^@\M-^P\M- \M-a^A\M-^@\M- \M-a^Bp\M- \M-a \M-^?\M-^?\M-k@ \M-^_\M-e^B^P\M-\n\M-`<0\M-^_\M-e^C0b\M-`Ca\M-0\M-a\M-p\M-^G\M-=^H^@@\M- \M-c^AP\M- \M-a\t^@\M- \M-a^H^P\M- \M-a^G \M- \M-a^O\M-`\M- \M-a^D\M-p\M-^U\M-d^A@\M-^D\M-b^D^@V\M-a\M-w\M-^?\M-^?^Z\M-p\M-^G\M-=\M-h$\M-^B^@^@^L\M-^?\M-^?\M-^?^P\M-^?\M-^?\M-^?^D\M-`-\M-e^D\M-PM\M-b^DЍ\M-b^@\M-^@\M-=\M-h^A^@^B^@Usage: %s testfile\n^@Data in file `%s
./test-distrib:18: command not found: Most
./test-distrib:19: command not found: have
./test-distrib:39: unmatched '
make[1]: *** [test-distrib] Error 127



-------------- SECOND RUN -------------------
arm-none-linux-gnueabi-gcc -c -D_BSD_SOURCE   -Demacs -DHAVE_CONFIG_H  -I. -I/home/toon/sandbox/os/Build/imx31d/emacs-23.3/src -D_BSD_SOURCE     -DHAVE_STRERROR -MMD -MF deps/prefix-args.d prefix-args.c
In file included from ./config.h:1075,
                 from prefix-args.c:46:
./m/arm.h:42:1: warning: "LIB_GCC" redefined
In file included from ./config.h:1074,
                 from prefix-args.c:46:
./s/gnu-linux.h:200:1: warning: this is the location of the previous definition
arm-none-linux-gnueabi-gcc -Demacs -DHAVE_CONFIG_H  -I. -I/home/toon/sandbox/os/Build/imx31d/emacs-23.3/src -D_BSD_SOURCE     -DHAVE_STRERROR -MMD -MF deps/.d -L/home/toon/sandbox/os/Sync/imx31d/Archives -L/home/toon/sandbox/os/Sync/imx31d/Libs -Wl,-znocombreloc  prefix-args.o -o prefix-args
arm-none-linux-gnueabi-gcc -nostdlib `./prefix-args -Xlinker  -z nocombreloc` -L/home/toon/sandbox/os/Sync/imx31d/Archives -L/home/toon/sandbox/os/Sync/imx31d/Libs -Wl,-znocombreloc  -o temacs pre-crt0.o /usr/lib/crt1.o /usr/lib/crti.o dispnew.o frame.o scroll.o xdisp.o menu.o  window.o charset.o coding.o category.o ccl.o character.o chartab.o cm.o term.o terminal.o xfaces.o    emacs.o keyboard.o macros.o keymap.o sysdep.o buffer.o filelock.o insdel.o marker.o minibuf.o fileio.o dired.o filemode.o cmds.o casetab.o casefiddle.o indent.o search.o regex.o undo.o alloc.o data.o doc.o editfns.o callint.o eval.o floatfns.o fns.o font.o print.o lread.o syntax.o unexelf.o bytecode.o process.o callproc.o region-cache.o sound.o atimer.o doprnt.o strftime.o intervals.o textprop.o composite.o md5.o     terminfo.o lastfile.o   vm-limit.o  mktime.o       -lncurses   -lgcc_s -lm -lgcc -lc -lgcc /usr/lib/crtn.o -lgcc_s
zsh:1: exec format error: ./prefix-args
/home/toon/sandbox/os/Ref/imx31d/imx31-toolchain/Imx31/bin/../lib/gcc/arm-none-linux-gnueabi/4.1.2/../../../../arm-none-linux-gnueabi/bin/ld: /usr/lib/crt1.o: Relocations in generic ELF (EM: 3)
/home/toon/sandbox/os/Ref/imx31d/imx31-toolchain/Imx31/bin/../lib/gcc/arm-none-linux-gnueabi/4.1.2/../../../../arm-none-linux-gnueabi/bin/ld: /usr/lib/crt1.o: Relocations in generic ELF (EM: 3)
/home/toon/sandbox/os/Ref/imx31d/imx31-toolchain/Imx31/bin/../lib/gcc/arm-none-linux-gnueabi/4.1.2/../../../../arm-none-linux-gnueabi/bin/ld: /usr/lib/crt1.o: Relocations in generic ELF (EM: 3)
/usr/lib/crt1.o: could not read symbols: File in wrong format
collect2: ld returned 1 exit status
make[1]: *** [temacs] Error 1
make[1]: Leaving directory `/home/toon/sandbox/os/Build/imx31d/emacs-23.3/src'
make: *** [src] Error 2

bug#9192: Cross-compile for ARM

[Andreas Schwab]

The emacs sources are not prepared for cross compilation.

Andreas.

-- 
Andreas Schwab, schwab@linux-m68k.org
GPG Key fingerprint = 58CA 54C7 6D53 942B 1756  01D3 44D5 214B 8276 4ED5
"And now for something completely different."

bug#9192: Cross-compile for ARM

[Toon Claes]

So the question is:
Is it a 'feature' or is it a bug?

Toon.


On 28 Jul 2011, at 23:13, Andreas Schwab wrote:

> The emacs sources are not prepared for cross compilation.
> 
> Andreas.
> 
> -- 
> Andreas Schwab, schwab@linux-m68k.org
> GPG Key fingerprint = 58CA 54C7 6D53 942B 1756  01D3 44D5 214B 8276 4ED5
> "And now for something completely different."

bug#9192: Cross-compile for ARM

[Stefan Monnier]

> Is it a 'feature' or is it a bug?

It's not a feature, but it's not a bug we find very important to fix.
IOW I'd be happy to accept patches which make cross-compiling easier,
but I won't write them myself and I would only accept them if they're
clean enough.

This said, I do remember someone posting on this list about a similar
issue and making actual progress in this direction.  And if you want to
try it, here are some things I know will need to be solved:
- We build a few programs used only during compilation: prefix-args,
  make-docfile, probably a few more (can't remember test-distrub, but
  if we build such a thing, then it's most likely in the set as well).
  You'll have to change the Makefile to compile those for the host
  rather than for the target.
- The Elisp files in lisp and leim need to be compiled by Emacs, so the
  src/bootstrap-emacs should be built for the host rather than for
  the target.
- You'll either want to build without dumping (i.e. set CANNOT_DUMP), or
  you'll want to split the dump step since it needs to be run on the
  target (but in either case you can do the dump for src/bootstrap-emacs
  since that runs on the host).  Builds using CANNOT_DUMP tend to have
  various misfeatures because this is basically never used and hence
  doesn't get much/any testing.

Maybe the easiest way to approach the problem is to first do a normal
build on the host (which builds src/bootstrap-emacs and compiles all the
Elisp files), then "rm src/*.o", reconfigure for the target and compile
src/temacs (and maybe afterwards do the `dump' on the target).


        Stefan

bug#9192: Cross-compile for ARM

[Dan Nicolaescu]

Stefan Monnier <monnier@iro.umontreal.ca> writes:

>> Is it a 'feature' or is it a bug?


BTW, the trunk should be a bit better now than the 23.x release in terms
of building.

> It's not a feature, but it's not a bug we find very important to fix.
> IOW I'd be happy to accept patches which make cross-compiling easier,
> but I won't write them myself and I would only accept them if they're
> clean enough.
>
> This said, I do remember someone posting on this list about a similar
> issue and making actual progress in this direction.  And if you want to
> try it, here are some things I know will need to be solved:
> - We build a few programs used only during compilation: prefix-args,

prefix-args has been removed from the trunk.

>   make-docfile, probably a few more (can't remember test-distrub, but
>   if we build such a thing, then it's most likely in the set as well).

We should just remove test-distrib.c ASAP, it doesn't seem that useful anymore.

>   You'll have to change the Makefile to compile those for the host
>   rather than for the target.
> - The Elisp files in lisp and leim need to be compiled by Emacs, so the
>   src/bootstrap-emacs should be built for the host rather than for
>   the target.
> - You'll either want to build without dumping (i.e. set CANNOT_DUMP), or

"temacs" now runs as expected, it should work better than setting
CANNOT_DUMP.
It starts up a bit slower, but it is just as usable as a dumped emacs
after that.

>   you'll want to split the dump step since it needs to be run on the
>   target (but in either case you can do the dump for src/bootstrap-emacs
>   since that runs on the host).  Builds using CANNOT_DUMP tend to have
>   various misfeatures because this is basically never used and hence
>   doesn't get much/any testing.
>
> Maybe the easiest way to approach the problem is to first do a normal
> build on the host (which builds src/bootstrap-emacs and compiles all the
> Elisp files), then "rm src/*.o", reconfigure for the target and compile
> src/temacs (and maybe afterwards do the `dump' on the target).

bug#13479: Cross Compiling for ARM

[Stefan Kangas]

Toon Claes <toon@iotcl.net> writes:

> I was trying to cross-compile emacs for ARM (don't ask me why).
> But got an error during 'make' (see output below FIRST RUN).
>
> So it's for sure 'test-distrub' was build for ARM, while it is trying to run on i686.
>
> On the second run (just, ran 'make again), I got a similar error on 'prefix-args'.
> But for some reason the 'test-distrub' error is gone (probably because 'make' thinks it is already finished.
>
> So I have to compile them with the host compiler (i686).
> But I'm not sure how to implement this properly.
>
>
> Also I would like to get rid of the warning: "LIB_GCC" redefined

That was 12 years ago.  I'm therefore reaching out to ask if this bug is
still relevant, or if it has since been fixed?

If I don't hear back from you within a couple of months, Ill just assume
that this has been fixed and close this bug.

Thanks in advance.

bug#13479: Cross Compiling for ARM

[Po Lu via Bug reports for GNU Emacs, the Swiss army knife of text editors]

Stefan Kangas <stefankangas@gmail.com> writes:

> Toon Claes <toon@iotcl.net> writes:
>
>> I was trying to cross-compile emacs for ARM (don't ask me why).
>> But got an error during 'make' (see output below FIRST RUN).
>>
>> So it's for sure 'test-distrub' was build for ARM, while it is trying to run on i686.
>>
>> On the second run (just, ran 'make again), I got a similar error on 'prefix-args'.
>> But for some reason the 'test-distrub' error is gone (probably because 'make' thinks it is already finished.
>>
>> So I have to compile them with the host compiler (i686).
>> But I'm not sure how to implement this properly.
>>
>>
>> Also I would like to get rid of the warning: "LIB_GCC" redefined
>
> That was 12 years ago.  I'm therefore reaching out to ask if this bug is
> still relevant, or if it has since been fixed?
>
> If I don't hear back from you within a couple of months, Ill just assume
> that this has been fixed and close this bug.

The Android port is routinely cross-compiled for ARM systems, so despite
its using a different build procedure from the rest of our builds, no
code except dumping should remain that prevents cross-compiling Emacs.

The OP's requirements have also been satisified by the Android port,
which is supposed to support Chromebooks.

bug#13479: Cross Compiling for ARM

[Stefan Kangas]

Po Lu <luangruo@yahoo.com> writes:

> Stefan Kangas <stefankangas@gmail.com> writes:
>
>> Toon Claes <toon@iotcl.net> writes:
>>
>>> I was trying to cross-compile emacs for ARM (don't ask me why).
>>> But got an error during 'make' (see output below FIRST RUN).
>>>
>>> So it's for sure 'test-distrub' was build for ARM, while it is trying to run on i686.
>>>
>>> On the second run (just, ran 'make again), I got a similar error on 'prefix-args'.
>>> But for some reason the 'test-distrub' error is gone (probably because 'make' thinks it is already finished.
>>>
>>> So I have to compile them with the host compiler (i686).
>>> But I'm not sure how to implement this properly.
>>>
>>>
>>> Also I would like to get rid of the warning: "LIB_GCC" redefined
>>
>> That was 12 years ago.  I'm therefore reaching out to ask if this bug is
>> still relevant, or if it has since been fixed?
>>
>> If I don't hear back from you within a couple of months, Ill just assume
>> that this has been fixed and close this bug.
>
> The Android port is routinely cross-compiled for ARM systems, so despite
> its using a different build procedure from the rest of our builds, no
> code except dumping should remain that prevents cross-compiling Emacs.
>
> The OP's requirements have also been satisified by the Android port,
> which is supposed to support Chromebooks.

Thanks, I'm therefore closing this bug report.

If this conclusion is incorrect and this is still an issue, please reply
to this email (use "Reply to all" in your email client) and we can
reopen the bug report.

bug#13479: Cross Compiling for ARM

[Toon Claes via Bug reports for GNU Emacs, the Swiss army knife of text editors]

Stefan Kangas <stefankangas@gmail.com> writes:

>>> That was 12 years ago.  I'm therefore reaching out to ask if this bug is
>>> still relevant, or if it has since been fixed?

I don't know if the issue still exists, and I have no way to test it.
But I also assume it is no longer an issue, and agree to close this
issue.

Thanks for cleaning up this old bug report.

--
Toon