安装DBD-Informix的问题

各位大侠，小弟在安装DBD-Informix时，报下面的错误，请问该如何解决啊？先谢过了。
*** ExtUtils::AutoInstall version 0.56
*** Checking for dependencies...
[Core Features]
- DBI         ...loaded. (1.615 >= 1.3
[High Resolution Timing]
- Time::HiRes ...loaded. (1.9721)
[POD Format Testing]
- Test:od   ...loaded. (1.44)
*** ExtUtils::AutoInstall configuration finished.
Subroutine main::WriteMakefile redefined at /opt/perl32/lib/site_perl/5.12.2/ExtUtils/AutoInstall.pm line 457.

Configuring IBM Informix Database Driver for Perl DBI Version 2005.02 (2005-07-29) (aka DBD::Informix)
        You are using DBI version 1.615 and Perl version 5.012002
Remember to actually read the README file!

Perl:     perl v5.012002 PA-RISC2.0 dl_hpux.xs
System:   hp-ux r3 b.11.11 u 9000800 1909236376 unlimited-user license
Using INFORMIXDIR=/opt/informix and ESQL/C compiler esql
Using IBM Informix CSDK Version 2.81, IBM Informix-ESQL Version 9.53.HC1 from /opt/informix

Beware: DBD::Informix is not yet aware of all the new IUS data types.

Assert macro will be disabled!

lib/DBD/Informix/Defaults.pm written OK
esqlvrsn.h written OK
esqlinfo.h written OK

Testing whether your Informix test environment will work...
gcc: +DS2.0：没有该文件或目录
gcc: +DA1.1：没有该文件或目录
Failed to compile esqltest.ec to esqltest.o

Testing whether your Informix test environment will work...
gcc: +DS2.0：没有该文件或目录
gcc: +DA1.1：没有该文件或目录
Failed to compile esqltest.ec to esqltest.o

ds2.0 和 da1.1不知道是啥东东。