为 ARM 交叉编译 ocaml 应用程序 [英] Cross-compiling ocaml apps for ARM
问题描述
我正在交叉编译一个带有 ocaml 校准应用程序的触摸屏驱动程序.
I'm cross-compiling a touchscreen driver, which comes with an ocaml calibration application.
我正在尝试为 ARM 编译驱动程序和应用程序，特别是运行 Angström 的 Beagleboard.
I'm trying to compile the driver and the application for ARM, in particular, the Beagleboard, running Angström.
事情是这样的:
^_^[raziel@Bebop zytouch-driver-20081121]$ source /usr/local/angstrom/arm/environment-setup
^_^[raziel@Bebop zytouch-driver-20081121]$ make CC=arm-angstrom-linux-gnueabi-gcc
arm-angstrom-linux-gnueabi-gcc -std=gnu99 -g -O2 -Wall -Wextra -Werror -Wstrict-prototypes -Wmissing-prototypes -c -o daemon/config.o daemon/config.c
arm-angstrom-linux-gnueabi-gcc -std=gnu99 -g -O2 -Wall -Wextra -Werror -Wstrict-prototypes -Wmissing-prototypes -c -o daemon/util.o daemon/util.c
arm-angstrom-linux-gnueabi-gcc -std=gnu99 -g -O2 -Wall -Wextra -Werror -Wstrict-prototypes -Wmissing-prototypes -c -o daemon/debug.o daemon/debug.c
arm-angstrom-linux-gnueabi-gcc -std=gnu99 -g -O2 -Wall -Wextra -Werror -Wstrict-prototypes -Wmissing-prototypes -c -o daemon/zytouch_usb.o daemon/zytouch_usb.c
arm-angstrom-linux-gnueabi-gcc -std=gnu99 -g -O2 -Wall -Wextra -Werror -Wstrict-prototypes -Wmissing-prototypes -c -o daemon/zytouchd.o daemon/zytouchd.c
arm-angstrom-linux-gnueabi-gcc daemon/config.o daemon/util.o daemon/debug.o daemon/zytouch_usb.o daemon/zytouchd.o -lX11 -lXtst -lusb -lm -o zytouch-daemon
ocamlopt -cc arm-angstrom-linux-gnueabi-gcc -cclib -lcairo -cclib -lextlib -cclib -llablgtk2 -warn-error A -c -I +lablgtk2 -I +cairo -I +extlib -I calibrate calibrate/version.ml -o calibrate/version.cmx
ocamlopt -cc arm-angstrom-linux-gnueabi-gcc -cclib -lcairo -cclib -lextlib -cclib -llablgtk2 -warn-error A -c -I +lablgtk2 -I +cairo -I +extlib -I calibrate calibrate/util.ml -o calibrate/util.cmx
ocamlopt -cc arm-angstrom-linux-gnueabi-gcc -cclib -lcairo -cclib -lextlib -cclib -llablgtk2 -warn-error A -c -I +lablgtk2 -I +cairo -I +extlib -I calibrate calibrate/config.ml -o calibrate/config.cmx
ocamlopt -cc arm-angstrom-linux-gnueabi-gcc -cclib -lcairo -cclib -lextlib -cclib -llablgtk2 -warn-error A -c -I +lablgtk2 -I +cairo -I +extlib -I calibrate calibrate/orientation.ml -o calibrate/orientation.cmx
ocamlopt -cc arm-angstrom-linux-gnueabi-gcc -cclib -lcairo -cclib -lextlib -cclib -llablgtk2 -warn-error A -c -I +lablgtk2 -I +cairo -I +extlib -I calibrate calibrate/tscalibrate.ml -o calibrate/tscalibrate.cmx
ocamlopt -cc arm-angstrom-linux-gnueabi-gcc -cclib -lcairo -cclib -lextlib -cclib -llablgtk2 -warn-error A -cc arm-angstrom-linux-gnueabi-gcc -cclib -lcairo -cclib -lextlib -cclib -llablgtk2 -warn-error A -I +lablgtk2 -I +cairo -I +extlib -I calibrate extLib.cmxa str.cmxa unix.cmxa lablgtk.cmxa cairo_lablgtk.cmxa cairo.cmxa gtkInit.cmx calibrate/version.cmx calibrate/util.cmx calibrate/config.cmx calibrate/orientation.cmx calibrate/tscalibrate.cmx -o zytouch-calibrate
/usr/local/angstrom/arm/lib/gcc/arm-angstrom-linux-gnueabi/4.3.3/../../../../arm-angstrom-linux-gnueabi/bin/ld: /tmp/camlstartup71ef32.o: Relocations in generic ELF (EM: 3)
/usr/local/angstrom/arm/lib/gcc/arm-angstrom-linux-gnueabi/4.3.3/../../../../arm-angstrom-linux-gnueabi/bin/ld: /tmp/camlstartup71ef32.o: Relocations in generic ELF (EM: 3)
/tmp/camlstartup71ef32.o: could not read symbols: File in wrong format
collect2: ld returned 1 exit status
File "caml_startup", line 1, characters 0-1:
Error: Error during linking
make: *** [zytouch-calibrate] Error 2
我陷入了 Relocations in generic ELF (EM: 3) 错误.
Makefile 如下所示:
The Makefile looks like this:
(...)
OFLAGS = -cc ${CC} -cclib -lcairo -cclib -lextlib -cclib -llablgtk2 -warn-error A
OCAMLOPT = ocamlopt $(OFLAGS)
OCAML_INC = -I +lablgtk2 -I +cairo -I +extlib -I calibrate
OCAML_LIBS = $(OCAML_INC) extLib.cmxa str.cmxa unix.cmxa lablgtk.cmxa cairo_lablgtk.cmxa cairo.cmxa gtkInit.cmx
(...)
config.cmx: util.cmx
orientation.cmx: config.cmx
tscalibrate.cmx: version.cmx util.cmx orientation.cmx config.cmx
%.cmx : %.ml
$(OCAMLOPT) -c $(OCAML_INC) $< -o $@
%.mli : %.ml
$(OCAMLC) -i $(OCAML_INC) $+
由于 /usr/local/angstrom/arm/environment-setup 将 /usr/local/angstrom/arm/bin 作为我的 PATH 的第一个元素，我尝试用ARM版本替换一些程序
As /usr/local/angstrom/arm/environment-setup leaves /usr/local/angstrom/arm/bin as the first element of my PATH, I tried to replace some programs with the ARM versions
sudo ln -s /usr/local/angstrom/arm/bin/arm-angstrom-linux-gnueabi-ar /usr/local/angstrom/arm/bin/ar
sudo ln -s /usr/local/angstrom/arm/bin/arm-angstrom-linux-gnueabi-as /usr/local/angstrom/arm/bin/as
sudo ln -s /usr/local/angstrom/arm/bin/arm-angstrom-linux-gnueabi-ld /usr/local/angstrom/arm/bin/ld
然而，替换as后，模块甚至不编译
However, after replacing as, the modules don't even compile
ocamlopt -cc arm-angstrom-linux-gnueabi-gcc -cclib -lcairo -cclib -lextlib -cclib -llablgtk2 -warn-error A -c -I +lablgtk2 -I +cairo -I +extlib -I calibrate calibrate/version.ml -o calibrate/version.cmx
/tmp/camlasm41bb77.s: Assembler messages:
/tmp/camlasm41bb77.s:31: Error: alignment too large: 15 assumed
/tmp/camlasm41bb77.s:35: Error: bad instruction `movl $camlVersion__3,%eax'
/tmp/camlasm41bb77.s:36: Error: bad instruction `movl %eax,camlVersion'
/tmp/camlasm41bb77.s:37: Error: bad instruction `movl $camlVersion__2,%eax'
/tmp/camlasm41bb77.s:38: Error: bad instruction `movl %eax,camlVersion+4'
/tmp/camlasm41bb77.s:39: Error: bad instruction `movl $camlVersion__1,%eax'
/tmp/camlasm41bb77.s:40: Error: bad instruction `movl %eax,camlVersion+8'
/tmp/camlasm41bb77.s:41: Error: bad instruction `movl $1,%eax'
/tmp/camlasm41bb77.s:42: Error: bad instruction `ret'
/tmp/camlasm41bb77.s:43: Error: unrecognized symbol type ""
File "calibrate/version.ml", line 1, characters 0-1:
Error: Assembler error, input left in file /tmp/camlasm41bb77.s
make: *** [calibrate/version.cmx] Error 2
我很确定这一定是一个非常愚蠢的错误，但我找不到有关如何正确执行此操作的文档.有谁知道什么可能会失败?
I'm pretty sure it must be a very stupid error, but I can't find documentation on how to do this properly. Does anyone know what could be failing?
可以在此处找到我正在尝试构建的驱动程序的源代码.
The source code of the driver I'm trying to build can be found here.
推荐答案
ocaml 目前不支持交叉编译，并且传递 -cc 选项不会让它神奇地交叉编译到 arm.有一些补丁可以使它成为可能，但没有正式的补丁.我记得使用修补过的 ocamlopt 并且它适用于简单的程序.但在这种情况下，您还需要交叉编译所有依赖库，这可能是一项艰巨的任务.
ocaml currently doesn't support cross-compilation, and passing -cc option will not make it magically cross-compile to arm. There are some patches floating around that make it possible, but nothing official. I remember using patched ocamlopt and it worked ok for simple programs. But in this case you will also need to cross-compile all dependent libraries and this can be quite a bit of a task.
我认为您最好的解决方案是:
I think your best solution is to either :
在 arm qemu 中本地构建(这很容易，有预构建的 debian 图像可用)
构建校准应用程序的字节码二进制文件(字节码可在架构之间移植，但需要在目标上安装相同版本的 ocaml)并安装所需的存根库(包含用于绑定到 gtk、cairo、等)在手臂上(本地构建或从包中构建)
build a bytecode binary of calibration application (bytecode is portable between architectures but requires the same version of ocaml installed on the target) and install required stub libraries (the ones that contain C code for bindings to gtk,cairo,etc) on arm (built natively or from packages)
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