请参阅第 2 部分，其中列出了安装模块时的最新错误继续发布。
通常，当我尝试使用标准 cpan> install XML::Xercers 安装 XML::Xerces CPAN 模块时，我会在一些处理后收到以下错误消息：
XML-Xerces-2.7.0-0/samples/SEnumVal.pl
...
XML-Xerces-2.7.0-0/postSource.pl
XML-Xerces-2.7.0-0/xerces-headers.txt
Removing previously used /home/adoshi/.cpan/build/XML-Xerces-2.7.0-0
CPAN.pm: Going to build J/JA/JASONS/XML-Xerces-2.7.0-0.tar.gz
WARNING
You have not defined any of the following environment variables:
XERCESCROOT
XERCES_LIB
XERCES_INCLUDE
These instruct me how to locate the Xerces header files, and the
Xerces dynamic library. If they are installed in a standard system
directory, I will located them without those variables.
However, if they have been installed in a non-standard location
(e.g. '/usr/include/xerces'), then I will need help. See the README
for more info.
Proceeding ...
WARNING
You have not defined any of the following environment variables:
XERCESCROOT
XERCES_CONFIG
Without these I cannot find the config.status file that was used to
build your Xerces-C library. Without that file, I may not be able to properly
build the C++ glue files that come with Xerces.pm.
Proceeding anyway ...
Couldn't find XercesVersion.hpp in your include directory at Makefile.PL line 1 88.
Running make test
Make had some problems, maybe interrupted? Won't test
Running make install
Make had some problems, maybe interrupted? Won't install
在将环境变量设置为 之后/home/username/XML-Xerces-2.7.0-0/XML-Xerces-2.7.0-0/Xerces.pm，请注意这里不确定我是否应该将环境变量指向Xerces.pmorXerces.cpp或Xerces-extra.pmor Xerces.i，但现在我将环境变量指向/home/username/XML-Xerces-2.7.0-0/XML-Xerces-2.7.0-0/Xerces.pm
如上所述设置环境变量并输入后，cpan>install XML::Xerces我收到以下消息：
CPAN: Storable loaded ok
Going to read /home/username/.cpan/Metadata
Database was generated on Fri, 16 Oct 2009 18:27:06 GMT
Running install for module XML::Xerces
Running make for J/JA/JASONS/XML-Xerces-2.7.0-0.tar.gz
CPAN: Digest::MD5 loaded ok
CPAN: Compress::Zlib loaded ok
Checksum for /home/adoshi/.cpan/sources/authors/id/J/JA/JASONS/XML-Xerces-2.7.0-0.tar.gz ok
Scanning cache /home/adoshi/.cpan/build for sizes
XML-Xerces-2.7.0-0/
...
XML-Xerces-2.7.0-0/postSource.pl
XML-Xerces-2.7.0-0/xerces-headers.txt
Removing previously used /home/adoshi/.cpan/build/XML-Xerces-2.7.0-0
CPAN.pm: Going to build J/JA/JASONS/XML-Xerces-2.7.0-0.tar.gz
Using XERCES_LIB = /home/adoshi/XML-Xerces-2.7.0-0/XML-Xerces-2.7.0-0/Xerces.pm
using XERCES_CONFIG: /home/adoshi/XML-Xerces-2.7.0-0/XML-Xerces-2.7.0-0/Xerces.pm
- Found CXX =
- Found CXXFLAGS =
- Found LDFLAGS =
Couldn't find XercesVersion.hpp in your include directory at Makefile.PL line 188, <CONF> line 6823.
Running make test
Make had some problems, maybe interrupted? Won't test
Running make install
Make had some problems, maybe interrupted? Won't install
注意：我已经尝试下载XML::Xerces并尝试再次安装它，无论是手动还是使用 CPAN，但都收到了上述错误消息。
可能的原因是什么，可以建议什么来解决这个问题？
更新：即使在构建 Xerces-C 之后，XML::Xerces 模块也没有构建，并且收到以下错误消息。
[adoshi@upc01.dev XML-Xerces-2.7.0-0]$ perl Makefile.PL
Using XERCES_LIB = /adoshi/lib
Using XERCES_INCLUDE = /adoshi/include/xerces
WARNING
You have defined the XERCESCROOT variable, but the file:
XERCESCROOT/src/xercesc/config.status
does not seem to point to the config.status file that was used to
build your Xerces-C library. Without that file, I may not be able to
properly build the C++ glue files that come with Xerces.pm.
Proceeding anyway ...
Couldn't find XercesVersion.hpp in your include directory /adoshi/include/xerces at Makefile.PL line 188.
Update2这是得到的错误，它说存在某种版本不匹配。
Using XERCES_LIB = /home/adoshi/XML-Parser/Parser2/xerces-c_2_8_0-hppa-hpux-acc_3(1)/xerces-c_2_8_0-hppa-hpux-acc_3/lib
Using XERCES_INCLUDE = /home/adoshi/XML-Parser/Parser2/xerces-c_2_8_0-hppa-hpux-acc_3(1)/xerces-c_2_8_0-hppa-hpux-acc_3/include
WARNING
You have defined the XERCESCROOT variable, but the file:
XERCESCROOT/src/xercesc/config.status
does not seem to point to the config.status file that was used to
build your Xerces-C library. Without that file, I may not be able to
properly build the C++ glue files that come with Xerces.pm.
Proceeding anyway ...
Using Xerces-C version info from /home/adoshi/XML-Parser/Parser2/xerces-c_2_8_0-hppa-hpux-acc_3(1)/xerces-c_2_8_0-hppa-hpux-acc_3/include/xercesc/util/XercesVersion.hpp
*** Version Mismatch ***
You are attempt to build XML::Xerces-2.7.0-0 using Xerces-C-2.8.0,
this will most likely fail, so I am aborting.
You must use Xerces-C-2.7.0