The following bugs occur when trying to install ruby enterprise on distros like fedora 15 or archlinux:

/bin/sh ./libtool --tag=CXX --mode=compile g++ -DHAVE_CONFIG_H -I. -I. -I./src  -I./src   -DNO_TCMALLOC_SAMPLES -pthread -DNDEBUG -Wall -Wwrite-strings -Woverloaded-virtual -Wno-sign-compare -fno-builtin-malloc -fno-builtin-free -fno-builtin-realloc -fno-builtin-calloc -fno-builtin-cfree -fno-builtin-memalign -fno-builtin-posix_memalign -fno-builtin-valloc -fno-builtin-pvalloc  -DNO_FRAME_POINTER -g -O2 -c -o libtcmalloc_minimal_la-tcmalloc.lo `test -f 'src/tcmalloc.cc' || echo
'./'`src/tcmalloc.cc
libtool: compile:  g++ -DHAVE_CONFIG_H -I. -I. -I./src -I./src -DNO_TCMALLOC_SAMPLES -pthread -DNDEBUG -Wall -Wwrite-strings -Woverloaded-virtual -Wno-sign-compare -fno-builtin-malloc -fno-builtin-free -fno-builtin-realloc -fno-builtin-calloc -fno-builtin-cfree -fno-builtin-memalign -fno-builtin-posix_memalign -fno-builtin-valloc -fno-builtin-pvalloc -DNO_FRAME_POINTER -g -O2 -c src/tcmalloc.cc  -fPIC -DPIC -o .libs/libtcmalloc_minimal_la-tcmalloc.o
src/tcmalloc.cc:1672:54: error: conflicting declaration ‘void* (* __memalign_hook)(size_t, size_t, const void*)’
/usr/include/malloc.h:183:39: error: ‘__memalign_hook’ has a previous declaration as ‘void* (* volatile __memalign_hook)(size_t, size_t, const void*)’
make: *** [libtcmalloc_minimal_la-tcmalloc.lo] Error 1

and

gcc -I/opt/local/include -I. -I/opt/local/include -I../.. -I../../. -I../.././ext/dl -DHAVE_DLFCN_H -DHAVE_DLOPEN -DHAVE_DLCLOSE -DHAVE_DLSYM -DHAVE_DLERROR    -I. -fPIC -g -O2   -fno-defer-pop -fno-omit-frame-pointer  -c dl.c
In file included from dl.c:104:0:
callback.func:1:1: warning: data definition has no type or storage class [enabled by default]
callback.func:1:7: error: expected identifier or ‘(’ before ‘long’
In file included from dl.c:104:0:
callback.func:78:33: error: expected ‘)’ before ‘(’ token
callback.func:79:3: warning: data definition has no type or storage class [enabled by default]
callback.func:79:24: error: ‘proc’ undeclared here (not in a function)
callback.func:79:39: error: ‘argc’ undeclared here (not in a function)
callback.func:79:45: error: ‘argv’ undeclared here (not in a function)
callback.func:82:1: error: expected identifier or ‘(’ before ‘}’ token
dl.c:106:1: error: expected ‘;’, ‘,’ or ‘)’ before ‘static’
make[1]: *** [dl.o] Error 1

The fix is outlined in this stackoverflow post

Download my patch and use it with:

rvm install --force --patch 0001-archlinux.patch ree