交叉编译samba（mipsel-linux）
这篇文章我从网上下下来的，一直放在草稿箱里，忘了从哪里转来的。感谢原作者，按他的做法能正常移植。
今天完成了交叉编译samba的学习。将samba移植到mipsel-linux平台上。相关工作流程如下。
一：简介
制作mipsel-linux交叉编译工具链；
使用samba-3.3.3.tar.gz源代码；
二：流程
1、在/etc/profile中设置mipsel-linux交叉编译工具路径，执行source指令使之生效；
或者在当前终端标签页中使用export PATH=${bin directory of mipsel-linux}:$PATH
2、解压samba到设定之目录；
3、configure脚本build.sh
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#!/bin/bash
export CFLAGS='-O3 -w -isystem /Cross/target/local/mipsel-linux/include'
export CPPFLAGS='-O3 -w -isystem /Cross/target/local/mipsel-linux/include'
export PATH=/Cross/target/local/bin:$PATH
export LD_LIBRARY_PATH=/Cross/target/local/bin/mipsel-linux-gcc
export CC=/Cross/target/local/bin/mipsel-linux-gcc
export CPP=/Cross/target/local/bin/mipsel-linux-cpp
./configure --build=i686-linux --host=mipsel-linux --target=mipsel-linux \
--includedir=/Cross/target/local/mipsel-linux/include \
--oldincludedir=/Cross/target/local/mipsel-linux/include \
--disable-largefile \
--enable-swat=no \
--enable-cups=no \
--enable-iprint=no \
--enable-pie=no \
--enable-fam=no \
--enable-static=yes \
--enable-shared-libs=no \
--enable-dnssd=no \
--with-ldap=no \
--with-ads=no \
--with-cifsmount=no \
--with-utmp=no \
--with-libtalloc=no \
--with-libtdb=no \
--with-libnetapi=no \
--with-libaddns=no \
--with-libsmbclient=no \
--with-libsmbsharemodes=no \
--with-acl-support=no \
--with-sendfile-support=no \
--with-winbind=no \
--with-static-modules=nmbd,smbd,smbclient,smbpasswd \
--bindir=$MQARMDIR/bin \
--sbindir=$MQARMDIR/bin \
--localstatedir=$MQUSERDIR/samba/var \
--libdir=$MQARMDIR/lib \
--with-privatedir=$MQUSERDIR/samba/private \
--with-rootsbindir=$MQARMDIR/bin \
--with-lockdir=$MQUSERDIR/samba/var/locks \
--with-configdir=$MQUSERDIR/samba \
--with-logfilebase=$MQUSERDIR/samba/var \
--with-piddir=$MQUSERDIR/samba/var \
--cache-file=mipsel-linux.cache
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执行该编译脚本。在编译过程中会出现一些问题，现描述如下：
3.1 error: cannot run test program while cross compiling错误
checking that the C compiler understands negative enum values... configure: error: in `/root/samba-3.3.3/source':
configure: error: cannot run test program while cross compiling
原因：
查找“negative enum values”关键字，就可以找到问题发生的地方。
通常我们configure的时候使用./configure --build=i686-linux --host=$ARCH-linux --target=$ARCH-linux的形式，但是在configure中有很多的测试程序是不能在HOST上运行的。configure不能为交叉编译检查samba_cv_CC_NEGATIVE_ENUM_VALUES。configure无法在目标机上运行测试程序，自然无法检查，只好手工指定。
解决方法：
#echo samba_cv_CC_NEGATIVE_ENUM_VALUES=yes>mipsel-linux.cache
然后在build.sh脚本中的最后一行添加“--cache-file=mipsel-linux.cache”
如果后面还遇到类似的问题，则之需要找到相关的地方，并将指定的值追加到mipsel-linux.cache文件中。
3.2 configure: error: cannot run test program while cross compiling错误
configure: error: in `/root/samba-3.3.3/source':
configure: error: cannot run test program while cross compiling
See `config.log' for more details.
原因：这个错误是由于configure对交叉编译支持的问题造成的，通过在configure文件中查找，您可以看到原文件中该部分的内容为：
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{ $as_echo "$as_me:$LINENO: checking for replacing readdir using getdirentries()" >&5
$as_echo_n "checking for replacing readdir using getdirentries()... " >&6; }
if test "${libreplace_cv_READDIR_GETDIRENTRIES+set}" = set; then
$as_echo_n "(cached) " >&6
else
if test "$cross_compiling" = yes; then
{ { $as_echo "$as_me:$LINENO: error: in \`$ac_pwd':" >&5
$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
{ { $as_echo "$as_me:$LINENO: error: cannot run test program while cross compiling
See \`config.log' for more details." >&5
$as_echo "$as_me: error: cannot run test program while cross compiling
See \`config.log' for more details." >&2;}
{ (exit 1); exit 1; }; }; }
else
cat >conftest.$ac_ext <<_ACEOF
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上面即为问题出现点，红色字体部分是需要修改的地方。修改后的结果如下：
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{ $as_echo "$as_me:$LINENO: checking for replacing readdir using getdirentries()" >&5
$as_echo_n "checking for replacing readdir using getdirentries()... " >&6; }
if test "${libreplace_cv_READDIR_GETDIRENTRIES+set}" = set; then
$as_echo_n "(cached) " >&6
else
if test "$cross_compiling" = yes; then
{ { $as_echo "$as_me:$LINENO: error: in \`$ac_pwd':" >&5
$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
{ { $as_echo "$as_me:$LINENO: error: cannot run test program while cross compiling
See \`config.log' for more details." >&5
$as_echo "$as_me: error: cannot run test program while cross compiling
See \`config.log' for more details." >&2;}
}; } #新增该行
＃注销该行 { (exit 1); exit 1; }; }; }
else
cat >conftest.$ac_ext <<_ACEOF
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以关键字“error: cannot run test program while cross compiling”查找configure文件，将其中相关代码都修改过来，即可以解决该问题。
3.3 头文件错误
编译过程中会出现找不到头文件的错误，拷贝/usr/include/linux/dqblk_xfs.h文件到mipsel-linux交叉编译工具链的linux/include目录中；
cp /usr/include/linux/dqblk_xfs.h /Cross/target/local/mipsel-linux/include/linux
3.4 库文件连接错误：找不到-lcups
拷贝交叉编译的cups相关库到mipsel-linux交叉编译工具链的lib目录中
cp /crosstool/test/cups/mips/cups-1.3.9/cups/libcups.a /Cross/target/local/mipsel-linux/lib
cp /crosstool/test/cups/mips/cups-1.3.9/cups/libcups.so* /Cross/target/local/mipsel-linux/lib
以上目录需要自己指定您机器上的目录，以上只是本机的目录。
4、make
执行make指令。
三. 配置
[global]
workgroup = MSHOME
unix charset = UTF8
display charset = UTF8
dos charset = UTF8
netbios name = longjindong
dns proxy = no
domain master = no
local master = Yes
preferred master = Yes
os level = 35
socket options = TCP_NODELAY SO_RCVBUF=8192 SO_SNDBUF=8192
interfaces = 192.168.1.1/192.168.1.0
guest account = admin
log level = 0
max log size = 10
security = share
load printers = no
[longjindong]
path = /mnt/usb
writable = yes
guest ok = yes
read only = no
四：后记
参考文档：http://blog.csdn.net/robinqcn/archive/2008/10/23/3132054.aspx
欢迎大家讨论cups+samba到开发板的移植。
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