diff --git a/fastcpu/.gitignore b/fastcpu/.gitignore
new file mode 100644
index 0000000..ce68fe8
--- /dev/null
+++ b/fastcpu/.gitignore
@@ -0,0 +1,3 @@
+*.o
+*.so
+*~
diff --git a/fastcpu/Makefile b/fastcpu/Makefile
new file mode 100644
index 0000000..e8a2db1
--- /dev/null
+++ b/fastcpu/Makefile
@@ -0,0 +1,11 @@
+all: bitmsghash.so
+
+bitmsghash.so: bitmsghash.o
+	g++ -shared -L/usr/lib -lssl -lcrypto -o bitmsghash.so bitmsghash.o
+
+bitmsghash.o:
+	g++ -fpic -c bitmsghash.cpp
+
+clean:
+	rm *.o *.so
+
diff --git a/fastcpu/bitmsghash.cpp b/fastcpu/bitmsghash.cpp
index b2eb40f..ede2c9d 100644
--- a/fastcpu/bitmsghash.cpp
+++ b/fastcpu/bitmsghash.cpp
@@ -17,6 +17,14 @@
 #define HASH_SIZE 64
 #define BUFLEN 16384
 
+#if defined(__GNUC__)
+  #define EXPORT __attribute__ ((__visibility__("default")))
+  #define UINT intptr_t
+#elif defined(WIN32)
+  #define EXPORT __declspec(dllexport)
+  #define UINT unsigned int
+#endif
+
 #define ntohll(x) ( ( (uint64_t)(ntohl( (unsigned int)((x << 32) >> 32) )) << 32) | ntohl( ((unsigned int)(x >> 32)) ) )
 
 unsigned long long max_val;
@@ -30,7 +38,7 @@ DWORD WINAPI threadfunc(LPVOID lpParameter) {
         DWORD incamt = (DWORD)lpParameter;
 #else
 void * threadfunc(void* param) {
-        unsigned int incamt = (unsigned int)param;
+        UINT incamt = (UINT)param;
 #endif
         SHA512_CTX sha;
         unsigned char buf[HASH_SIZE+sizeof(uint64_t)] = {0};
@@ -59,7 +67,7 @@ void * threadfunc(void* param) {
         return NULL;
 }
 
-extern "C" __declspec(dllexport) unsigned long long BitmessagePOW(unsigned char * starthash, unsigned long long target)
+extern "C" EXPORT unsigned long long BitmessagePOW(unsigned char * starthash, unsigned long long target)
 {
 		successval = 0;
         max_val = target;
@@ -67,9 +75,9 @@ extern "C" __declspec(dllexport) unsigned long long BitmessagePOW(unsigned char
 #       ifdef WIN32
         HANDLE* threads = (HANDLE*)calloc(sizeof(HANDLE), numthreads);
 #       else
-        pthread_t* threads = calloc(sizeof(pthread_t), numthreads);
+        pthread_t* threads = (pthread_t*)calloc(sizeof(pthread_t), numthreads);
 #       endif
-        for (int i = 0; i < numthreads; i++) {
+        for (UINT i = 0; i < numthreads; i++) {
 #       ifdef WIN32
                 threads[i] = CreateThread(NULL, 0, threadfunc, (LPVOID)i, 0, NULL);
 #       else
@@ -85,4 +93,4 @@ extern "C" __declspec(dllexport) unsigned long long BitmessagePOW(unsigned char
 #       endif
         free(threads);
         return successval;
-}
\ No newline at end of file
+}
diff --git a/fastcpu/proofofwork.py b/fastcpu/proofofwork.py
index 717c374..9bab66c 100644
--- a/fastcpu/proofofwork.py
+++ b/fastcpu/proofofwork.py
@@ -8,7 +8,7 @@
 
 import ctypes
 
-bitmsglib = 'BitMsgHash.so'
+bitmsglib = './bitmsghash.so'
 if "win32" == sys.platform:
 	bitmsglib = 'BitMsgHash.dll'
 bso = ctypes.CDLL(bitmsglib)