twins:Desktop blackthorne$ gem install RubyRRDtool
Building native extensions.  This could take a while...
ERROR:  Error installing RubyRRDtool:
	ERROR: Failed to build gem native extension.

/opt/local/bin/ruby extconf.rb install RubyRRDtool
checking for main() in -lz... yes
checking for main() in -lpng... yes
checking for main() in -lfreetype... yes
checking for main() in -lart_lgpl_2... yes
checking for rrd_first() in -lrrd... yes
creating Makefile

make
/usr/bin/gcc-4.0 -I. -I. -I/opt/local/lib/ruby/1.8/i686-darwin9 -I. -I/opt/local/include -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE  -I/opt/local/include -fno-common -O2  -fno-common -pipe -fno-common  -DHAVE_RRD_DUMP_R_2  -c rubyrrdtool.c
In file included from rubyrrdtool.c:25:
rrd_addition.h:20: error: redeclaration of enumerator ‘RD_I_VAL’
/opt/local/include/rrd.h:103: error: previous definition of ‘RD_I_VAL’ was here
rrd_addition.h:21: error: redeclaration of enumerator ‘RD_I_CNT’
/opt/local/include/rrd.h:104: error: previous definition of ‘RD_I_CNT’ was here
rrd_addition.h:22: error: redeclaration of enumerator ‘RD_I_STR’
/opt/local/include/rrd.h:105: error: previous definition of ‘RD_I_STR’ was here
rrd_addition.h:23: error: redeclaration of enumerator ‘RD_I_INT’
/opt/local/include/rrd.h:106: error: previous definition of ‘RD_I_INT’ was here
rrd_addition.h:39: error: conflicting types for ‘rrd_info’
/opt/local/include/rrd.h:132: error: previous declaration of ‘rrd_info’ was here
rubyrrdtool.c: In function ‘rrdtool_create’:
rubyrrdtool.c:317: warning: passing argument 5 of ‘rrd_create_r’ from incompatible pointer type
rubyrrdtool.c: In function ‘rrdtool_update’:
rubyrrdtool.c:590: warning: passing argument 4 of ‘rrd_update_r’ from incompatible pointer type
make: *** [rubyrrdtool.o] Error 1


Gem files will remain installed in /opt/local/lib/ruby/gems/1.8/gems/RubyRRDtool-0.6.0 for inspection.
Results logged to /opt/local/lib/ruby/gems/1.8/gems/RubyRRDtool-0.6.0/gem_make.out
twins:Desktop blackthorne$