Just tried to compile this on Linux x86-64.
It dumps a ton of warning and fails with the following errors:
el/inc/../libext/ext-fw.h:924: error: cast from void* to int loses precision
bitcoin-sha256.h:52: error: _rotr was not declared in this scope
I have the same error
In file included from bitcoin-miner.cpp:33:
bitcoin-sha256.h: In function Ext::UInt32 Rotr32(Ext::UInt32, int):
bitcoin-sha256.h:50: error: _rotr was not declared in this scope
make: *** [bitcoin-miner.o] Error 1