FreeBSD : Cannot allocate red zone for initial thread

前幾天主機大爆炸，apachectl stop 時狂噴錯誤訊息：

Fatal error 'Cannot allocate red zone for initial thread' at line 384 in file usr/src/lib/libthr/thread/thr_init.c (errno = 12)

餅乾要我 ldd /usr/local/sbin/httpd，看看會用到哪些 lib：

/usr/local/sbin/httpd:
       libm.so.4 => /lib/libm.so.4 (0x280ca000)
       libaprutil-1.so.2 => /usr/local/lib/libaprutil-1.so.2 (0x280e0000)
       libdb-4.2.so.2 => /usr/local/lib/libdb-4.2.so.2 (0x280f4000)
       libexpat.so.6 => /usr/local/lib/libexpat.so.6 (0x281b2000)
       libiconv.so.3 => /usr/local/lib/libiconv.so.3 (0x281d2000)
       libapr-1.so.2 => /usr/local/lib/libapr-1.so.2 (0x282c6000)
       libcrypt.so.3 => /lib/libcrypt.so.3 (0x282e6000)
       libpthread.so.2 => /lib/libpthread.so.2 (0x282fe000)
       libc.so.6 => /lib/libc.so.6 (0x28323000)
       libc.so.7 => /lib/libc.so.7 (0x2840a000)

錯誤原因是因為 kernel 更新以後，卻沒有更新函式庫，所以用到的全部是舊的函式庫，剛好 FreeBSD 6.x to 7.0 東西又改很大，所以倒台很正常。若有大的更新，步驟就不要偷跑，最好按照 Makefile 上的說明一步一步慢慢做：

1. make buildworld
2. make buildkernel KERNCONF=YOUR_KERNEL_HERE’ (default is GENERIC)
3. make installkernel KERNCONF=YOUR_KERNEL_HERE’ (default is GENERIC)
4. reboot (in single user mode: boot -s from the loader prompt)
5. mergemaster -p
6. make installworld
7. make delete-old
8. mergemaster
9. reboot
10. make delete-old-libs

最後一個步驟就是把舊的函式庫清除。

清除舊的函式庫以後，其他的套件執行時還是會去使用舊的函式庫，這時就會發生我遇到的錯誤。必須 pkg_delete -af 並重新編譯所有的套件，套件才會連到正確的函式庫。

更新後在 ldd 一次：

/usr/local/sbin/httpd:
        libm.so.5 => /lib/libm.so.5 (0x280d2000)
        libaprutil-1.so.2 => /usr/local/lib/libaprutil-1.so.2 (0x280e7000)
        libdb-4.2.so.2 => /usr/local/lib/libdb-4.2.so.2 (0x280fc000)
        libexpat.so.6 => /usr/local/lib/libexpat.so.6 (0x281d0000)
        libiconv.so.3 => /usr/local/lib/libiconv.so.3 (0x281f0000)
        libapr-1.so.2 => /usr/local/lib/libapr-1.so.2 (0x282e5000)
        libcrypt.so.4 => /lib/libcrypt.so.4 (0x28308000)
        libthr.so.3 => /lib/libthr.so.3 (0x28321000)
        libc.so.7 => /lib/libc.so.7 (0x28334000)