Erro ao compilar policyd

Prezados,

quero implementar o recurso SPF em meu MTA (postfix), mas estou tendo problemas na hora de compilar o policyd. Notem que tenho instalado as bibliotecas necessárias para sua compilação:

# rpm -qa |grep libspf2
libspf2-1.2.5-2mdk
libspf2-devel-1.2.5-2mdk

E está é a saída do comando ./configure ... :

checking spf2/spf.h usability... no
checking spf2/spf.h presence... yes
configure: WARNING: spf2/spf.h: present but cannot be compiled
configure: WARNING: spf2/spf.h: check for missing prerequisite headers?
configure: WARNING: spf2/spf.h: see the Autoconf documentation
configure: WARNING: spf2/spf.h: section "Present But Cannot Be Compiled"
configure: WARNING: spf2/spf.h: proceeding with the preprocessor's result
configure: WARNING: spf2/spf.h: in the future, the compiler will take precedence
configure: WARNING: ## ------------------------------------------ ##
configure: WARNING: ## Report this to the AC_PACKAGE_NAME lists. ##
configure: WARNING: ## ------------------------------------------ ##
checking for spf2/spf.h... yes
checking for SPF_destroy_config in -lspf2... no
libspf2 is required to build this program.


Alguém tem alguma idéia ?


Abraços !!