Problem compiling mysql-5.1.33

[Dave Shariff Yadallee - System Administrator a.k.a. The Root of the Problem]

make  all-am
Making all in mysql-test
Making all in lib/My/SafeProcess
g++ -DHAVE_CONFIG_H -I. -I../../../../include      -O3    -fno-implicit-templates
-fno-exceptions -fno-rtti -MT safe_process.o -MD -MP -MF .deps/safe_process.Tpo -c -o
safe_process.o safe_process.cc
In file included from safe_process.cc:48:
/usr/include/sys/resource.h:63: field `ru_utime' has incomplete type
/usr/include/sys/resource.h:64: field `ru_stime' has incomplete type 

why is this taking place?

Compile options

./configure --prefix=/usr/contrib --localstatedir=/usr/contrib/mysqld --without-innodb
--disable-debug --with-ssl=/usr/contrib --enable-thread-safe-client 

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