Good morning everyone,

When I try to install the FFI gem on my engineyard instance, I get the
following failure:

<snip>
i686-pc-linux-gnu-gcc -I. -I/usr/include/ruby-1.9.1/i686-linux -I/usr/
include/ruby-1.9.1/ruby/backward -I/usr/include/ruby-1.9.1 -I. -I/usr/
lib/ruby/gems/1.9.1/gems/ffi-1.0.7/ext/ffi_c/libffi/include -
DRUBY_EXTCONF_H=\"extconf.h\"  -D_FILE_OFFSET_BITS=64  -fPIC -O2 -
march=pentium-m -pipe -mno-tls-direct-seg-refs -fno-strict-aliasing -
fPIC -Wno-declaration-after-statement   -o Types.o -c Types.c
i686-pc-linux-gnu-gcc -I. -I/usr/include/ruby-1.9.1/i686-linux -I/usr/
include/ruby-1.9.1/ruby/backward -I/usr/include/ruby-1.9.1 -I. -I/usr/
lib/ruby/gems/1.9.1/gems/ffi-1.0.7/ext/ffi_c/libffi/include -
DRUBY_EXTCONF_H=\"extconf.h\"  -D_FILE_OFFSET_BITS=64  -fPIC -O2 -
march=pentium-m -pipe -mno-tls-direct-seg-refs -fno-strict-aliasing -
fPIC -Wno-declaration-after-statement   -o LastError.o -c LastError.c
i686-pc-linux-gnu-gcc -shared -o ffi_c.so ClosurePool.o
DynamicLibrary.o Platform.o ffi.o Thread.o MethodHandle.o
StructLayout.o FunctionInfo.o Buffer.o StructByValue.o Variadic.o
DataConverter.o ArrayType.o MappedType.o Struct.o Function.o Pointer.o
Type.o Call.o MemoryPointer.o StructByReference.o AbstractMemory.o
Types.o LastError.o -L. -L/usr/lib -Wl,-R/usr/lib -L. -Wl,-O1,--hash-
style=gnu -rdynamic -Wl,-export-dynamic -Wl,--no-undefined   /usr/lib/
ruby/gems/1.9.1/gems/ffi-1.0.7/ext/ffi_c/libffi/.libs/
libffi_convenience.a -Wl,-R -Wl,/usr/lib -L/usr/lib -lruby19  -
lpthread -lrt -ldl -lcrypt -lm   -lc
AbstractMemory.o: In function `memory_get_array_of_ulong':
AbstractMemory.c:(.text+0x40c9): undefined reference to
`__builtin_bswap32'
AbstractMemory.o: In function `memory_put_array_of_ulong':
AbstractMemory.c:(.text+0x425c): undefined reference to
`__builtin_bswap32'
<snip>

gcc version:

deploy@domU-12-31-39-0C-C0-A2 ~ $ gcc --version
gcc (GCC) 4.1.2 (Gentoo 4.1.2 p1.1)

please help.

~b