编译uClibc (__NR_or1k_atomic未声明)时出错

Question

我跟随http://openrisc.net/toolchain-build.html为openrisc or32构建gcc工具链。我正在做“人工建筑”流程，并通过了二进制文件

第一阶段gcc

安装linux报头

并执行“编译uClibc”，该命令由以下命令组成。

$ git clone git://openrisc.net/jonas/uClibc  
$ cd uClibc  
$ make ARCH=or32 defconfig  
$ make PREFIX=${SYSROOT}  
$ make PREFIX=${SYSROOT} install  <br>

当我运行'make ARCH=or32 defconfig‘时，我会得到这个错误。

CC libpthread/linuxthreads.old/attr.o  
In file included from libpthread/linuxthreads.old/internals.h:30:0,  
             from libpthread/linuxthreads.old/attr.c:26:  
./libpthread/linuxthreads.old/sysdeps/or32/pt-machine.h: In function 'testandset':  
./libpthread/linuxthreads.old/sysdeps/or32/pt-machine.h:41:8: error: '__NR_or1k_atomic' undeclared (first use in this function)  
./libpthread/linuxthreads.old/sysdeps/or32/pt-machine.h:41:8: note: each undeclared identifier is reported only once for each function it appears in  
In file included from libpthread/linuxthreads.old/../linuxthreads.old_db/proc_service.h:20:0,  
                 from libpthread/linuxthreads.old/../linuxthreads.old_db/thread_dbP.h:9,  
                 from libpthread/linuxthreads.old/internals.h:32,  
                 from libpthread/linuxthreads.old/attr.c:26:  
./include/sys/procfs.h: At top level:  
./include/sys/procfs.h:32:21: fatal error: asm/elf.h: No such file or directory  
compilation terminated.  
make: *** [libpthread/linuxthreads.old/attr.o] Error 1  

有人也有同样的问题吗？我使用CentOS 6.4。

Answer 1

gcc按顺序从系统中搜索头文件。

/usr/local/include  
libdir/gcc/target/version/include    (libdir was /usr/lib in my case)  
/usr/target/include  
/usr/include

我的系统在/usr/include下面有sys/syscall.h，所以在应该使用uClib/include下的sys/syscall时使用文件。所以我添加了-nostdinc，这样gcc就不会搜索标准的包含路径。现在它变成了

使PREFIX=${SYSROOT} -nostdinc

而且起作用了！

还修改了以下命令

使PREFIX=${SYSROOT} -nostdinc安装

干杯!