编译过程如下：

tar zxPf libesmtp-cygwin.tar.gz
tar zxPf gmp-cygwin.tar.gz

cd apache_1.3.33
./configure --prefix=/usr/local/www

cd ../php-4.3.11
./configure --with-apache=../apache_1.3.33
make
make install

cd ../apache_1.3.33
./configure --prefix=/usr/local/www --activate-module=src/modules/php4/libphp4.a
make
make install

进入 smthbbs 的源代码目录。编辑 site/devel.h文件，加入下面这一行：
#define BUILD_PHP_EXTENSION 1   /*将php lib编成php extension */

./configure --prefix=/usr/local/bbs --enable-site=devel \
              --with-www=/usr/local/www --with-php=/usr/local/include/php \
              --without-mysql --enable-ssh --enable-innbbsd
make

出现以下错误：

[Linking bbsall.exe]
/cygdrive/d/SmthBBS/smthbbs-1.2.2/bbs2www/lib/.libs/libbbslib.a(bbslib.o)(.text+0x29cc):bbslib.c: undefined reference to `_MsgDesUid'
/cygdrive/d/SmthBBS/smthbbs-1.2.2/bbs2www/lib/.libs/libbbslib.a(bbslib.o)(.text+0x29eb):bbslib.c: undefined reference to `_sendmsgfunc'
/cygdrive/d/SmthBBS/smthbbs-1.2.2/bbs2www/lib/.libs/libbbslib.a(bbslib.o)(.text+0x4354):bbslib.c: undefined reference to `_auto_register'
/cygdrive/d/SmthBBS/smthbbs-1.2.2/bbs2www/lib/.libs/libbbslib.a(bbslib.o)(.text+0x4d8a):bbslib.c: undefined reference to `_string_copy'
/cygdrive/d/SmthBBS/smthbbs-1.2.2/bbs2www/lib/.libs/libbbslib.a(bbslib.o)(.text+0x4dbf):bbslib.c: undefined reference to `_string_copy'
/cygdrive/d/SmthBBS/smthbbs-1.2.2/bbs2www/lib/.libs/libbbslib.a(bbslib.o)(.text+0x4df1):bbslib.c: undefined reference to `_string_copy'
/cygdrive/d/SmthBBS/smthbbs-1.2.2/bbs2www/lib/.libs/libbbslib.a(bbslib.o)(.text+0x4e23):bbslib.c: undefined reference to `_string_copy'
collect2: ld returned 1 exit status
make[3]: *** [bbsall.exe] Error 1
make[2]: *** [all-recursive] Error 1
make[1]: *** [all-recursive] Error 1
make: *** [all] Error 2

请大虾们指点一下解决办法吧，谢谢！
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因为我也卡在那里了，所以re了一下
【 在 dvlt (饿了就要吃！) 的大作中提到: 】
: 这都啥时候的了还re哪 @.@
: kbs能用吗？
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