在ports的路由升级过程中，在升级php5相关的包时遇到了一个小问题。

发出“portupgrade -vr php5*”后，其中一个端口升级失败。

错误：

===>  Building for php5-filter-5.3.4
In file included from /usr/ports/security/php5-filter/work/php-5.3.4/ext/filter/logical_filters.c:25:
/usr/local/include/php/ext/pcre/php_pcre.h:29:18: error: pcre.h: No such file or directory
In file included from /usr/ports/security/php5-filter/work/php-5.3.4/ext/filter/logical_filters.c:25:
/usr/local/include/php/ext/pcre/php_pcre.h:37: error: expected '=', ',', ';', 'asm' or '__attribute__' before '*' token
/usr/local/include/php/ext/pcre/php_pcre.h:38: error: expected '=', ',', ';', 'asm' or '__attribute__' before '*' token
/usr/local/include/php/ext/pcre/php_pcre.h:44: error: expected specifier-qualifier-list before 'pcre'
/usr/ports/security/php5-filter/work/php-5.3.4/ext/filter/logical_filters.c: In function 'php_filter_validate_regexp':
/usr/ports/security/php5-filter/work/php-5.3.4/ext/filter/logical_filters.c:411: error: 'pcre' undeclared (first use in this function)
/usr/ports/security/php5-filter/work/php-5.3.4/ext/filter/logical_filters.c:411: error: (Each undeclared identifier is reported only once
/usr/ports/security/php5-filter/work/php-5.3.4/ext/filter/logical_filters.c:411: error: for each function it appears in.)
/usr/ports/security/php5-filter/work/php-5.3.4/ext/filter/logical_filters.c:411: error: 're' undeclared (first use in this function)
/usr/ports/security/php5-filter/work/php-5.3.4/ext/filter/logical_filters.c:412: error: 'pcre_extra' undeclared (first use in this function)
/usr/ports/security/php5-filter/work/php-5.3.4/ext/filter/logical_filters.c: In function 'php_filter_validate_email':
/usr/ports/security/php5-filter/work/php-5.3.4/ext/filter/logical_filters.c:527: error: 'pcre' undeclared (first use in this function)
/usr/ports/security/php5-filter/work/php-5.3.4/ext/filter/logical_filters.c:527: error: 're' undeclared (first use in this function)
/usr/ports/security/php5-filter/work/php-5.3.4/ext/filter/logical_filters.c:528: error: 'pcre_extra' undeclared (first use in this function)
*** Error code 1
1 error
*** Error code 1
Stop in /usr/ports/security/php5-filter.
** Command failed [exit code 1]: /usr/bin/script -qa /tmp/portupgrade20101224-47314-9ktu04-0 env UPGRADE_TOOL=portupgrade UPGRADE_PORT=php5-filter-5.2.11_1 UPGRADE_PORT_VER=5.2.11_1 make
** Fix the problem and try again.
--->  Build of security/php5-filter ended at: Fri, 24 Dec 2010 09:36:27 +0800 (consumed 00:00:43)
--->  Upgrade of security/php5-filter ended at: Fri, 24 Dec 2010 09:36:27 +0800 (consumed 00:00:43)
--->  ** Upgrade tasks 1: 0 done, 0 ignored, 0

检查 /usr/ports/UPDATING 和 /usr/ports/MOVED 似乎没有给出提示。
接下来尝试在 Forum.FreeBSD.org 上阐明这一点：

cd /usr/ports/lang/php5/

make extract

cp /usr/ports/lang/php5/work/php-5.3.4/ext/pcre/pcrelib/pcre.h /usr/local/include/php/ext/pcre/

应用以上后，继续使用“portupgrade -vr php5*”升级端口。