如何使用NetBSD构建交叉编译NetBSD工具链

Question

我有一个使用qemu创建的NetBSD VM，我正在尝试使用Hello World.c源代码附带的build.sh脚本编译一个简单的NetBSD程序，并使用交叉编译的工具链。但是，我无法让程序编译。

我用以下命令构建了工具链，

./build.sh -m evbarm tools

./build.sh -m evbarm -U distribution

上面的命令输出的结果，

===> Tools built to /opt/cross/evbarm/usr/src/tooldir.NetBSD-4.0.1-i386
===> build.sh ended:   Sat Nov 28 12:52:34 CST 2015
===> Summary of results:
         build.sh command: ./build.sh -m evbarm tools
         build.sh started: Sat Nov 28 12:48:47 CST 2015
         NetBSD version:   4.0
         MACHINE:          evbarm
         MACHINE_ARCH:     arm
         Build platform:   NetBSD 4.0.1 i386
         HOST_SH:          /bin/sh
         No nonexistent/bin/nbmake, needs building.
         Bootstrapping nbmake
         TOOLDIR path:     /opt/cross/evbarm/usr/src/tooldir.NetBSD-4.0.1-i386
         DESTDIR path:     /opt/cross/evbarm/usr/src/destdir.evbarm
         RELEASEDIR path:  /opt/cross/evbarm/usr/src/releasedir
         Created /opt/cross/evbarm/usr/src/tooldir.NetBSD-4.0.1-i386/bin/nbmake
         makewrapper:      /opt/cross/evbarm/usr/src/tooldir.NetBSD-4.0.1-i386/bin/nbmake-evbarm
         Updated /opt/cross/evbarm/usr/src/tooldir.NetBSD-4.0.1-i386/bin/nbmake-evbarm
         Tools built to /opt/cross/evbarm/usr/src/tooldir.NetBSD-4.0.1-i386
         build.sh ended:   Sat Nov 28 12:52:34 CST 2015
===> .


make distribution started at:  Sat Nov 28 14:31:23 CST 2015
make distribution finished at: Sat Nov 28 15:04:34 CST 2015
===> Successful make distribution
===> build.sh ended:   Sat Nov 28 15:04:34 CST 2015
===> Summary of results:
         build.sh command: ./build.sh -m evbarm -U distribution
         build.sh started: Sat Nov 28 14:31:20 CST 2015
         NetBSD version:   4.0
         MACHINE:          evbarm
         MACHINE_ARCH:     arm
         Build platform:   NetBSD 4.0.1 i386
         HOST_SH:          /bin/sh
         No nonexistent/bin/nbmake, needs building.
         Bootstrapping nbmake
         TOOLDIR path:     /opt/cross/evbarm/usr/src/tooldir.NetBSD-4.0.1-i386
         DESTDIR path:     /opt/cross/evbarm/usr/src/destdir.evbarm
         RELEASEDIR path:  /opt/cross/evbarm/usr/src/releasedir
         Created /opt/cross/evbarm/usr/src/tooldir.NetBSD-4.0.1-i386/bin/nbmake
         makewrapper:      /opt/cross/evbarm/usr/src/tooldir.NetBSD-4.0.1-i386/bin/nbmake-evbarm
         Updated /opt/cross/evbarm/usr/src/tooldir.NetBSD-4.0.1-i386/bin/nbmake-evbarm
         Successful make distribution
         build.sh ended:   Sat Nov 28 15:04:34 CST 2015
===> .

但是，当我尝试使用helloARM.c包装器编译nbmake-evbarm时，我得到了以下输出：

$ nbmake-evbarm ./helloARM
/opt/cross/evbarm/usr/src/tooldir.NetBSD-4.0.1-i386/bin/arm--netbsdelf-gcc -O2   -Werror    -nostdinc -isystem /opt/cross/evbarm/usr/src/destdir.evbarm/usr/include    -o ./helloARM ./helloARM.c 
/opt/cross/evbarm/usr/src/tooldir.NetBSD-4.0.1-i386/lib/gcc/arm--netbsdelf/4.1.2/../../../../arm--netbsdelf/bin/ld: crt0.o: No such file: No such file or directory
collect2: ld returned 1 exit status

*** Failed target:  ./helloARM
*** Failed command: /opt/cross/evbarm/usr/src/tooldir.NetBSD-4.0.1-i386/bin/arm--netbsdelf-gcc -O2 -Werror -nostdinc -isystem /opt/cross/evbarm/usr/src/destdir.evbarm/usr/include -o ./helloARM ./helloARM.c 
*** Error code 1

Stop.
nbmake: stopped in /home/capin/apps

Answer 1

不要将./路径前缀放在目标名称上。

也就是说，只要跑：

nbmake-evbarm helloARM

当然，我假设您在同一个目录中有一个Makefile，它看起来有点像这样，至少：

PROG = helloARM

.include <bsd.prog.mk>

您必须有这样一个本地Makefile，它使用标准的NetBSD宏，因为当没有makefile (或者makefile不使用适当的NetBSD宏，即<bsd.prog.mk>)时，使用的是默认的sys.mk宏，并且它们不包括访问目标系统的头部和库等所需的所有${DESTDIR}魔术。