BSD compatibility

- separate Makefile for BSD make
- auto-compile will detect BSD and pass the correct parameters to make
- C PoW builds on OpenBSD and detects number of cores

src/bitmsghash/Makefile.bsd

@@ -0,0 +1,14 @@
+all: bitmsghash.so
+
+powtest:
+	./testpow.py
+
+bitmsghash.so: bitmsghash.o
+	${CXX} bitmsghash.o -shared -fPIC -lpthread -lcrypto $(LDFLAGS) -o bitmsghash.so
+
+bitmsghash.o:
+	${CXX} -Wall -O3 -march=native -fPIC $(CCFLAGS) -c bitmsghash.cpp
+
+clean:
+	rm -f bitmsghash.o bitmsghash.so
+

src/bitmsghash/bitmsghash.cpp

@@ -75,6 +75,10 @@ void getnumthreads()
 	DWORD_PTR dwProcessAffinity, dwSystemAffinity;
 #elif __linux__
 	cpu_set_t dwProcessAffinity;
+#elif __OpenBSD__
+	int mib[2], core_count = 0;
+	int dwProcessAffinity = 0;
+	size_t len2;
 #else
 	int dwProcessAffinity = 0;
 	int32_t core_count = 0;
@@ -86,6 +90,12 @@ void getnumthreads()
 	GetProcessAffinityMask(GetCurrentProcess(), &dwProcessAffinity, &dwSystemAffinity);
 #elif __linux__
 	sched_getaffinity(0, len, &dwProcessAffinity);
+#elif __OpenBSD__
+	len2 = sizeof(core_count);
+	mib[0] = CTL_HW;
+	mib[1] = HW_NCPU;
+	if (sysctl(mib, 2, &core_count, &len2, 0, 0) == 0)
+		numthreads = core_count;
 #else
 	if (sysctlbyname("hw.logicalcpu", &core_count, &len, 0, 0) == 0)
 		numthreads = core_count;

src/proofofwork.py

@@ -174,7 +174,12 @@ def buildCPoW():
         notifyBuild(False)
         return
     try:
-        call(["make", "-C", os.path.join(paths.codePath(), "bitmsghash")])
+        if "bsd" in sys.platform:
+            # BSD make
+            call(["make", "-C", os.path.join(paths.codePath(), "bitmsghash"), '-f', 'Makefile.bsd'])
+        else:
+            # GNU make
+            call(["make", "-C", os.path.join(paths.codePath(), "bitmsghash")])
         if os.path.exists(os.path.join(paths.codePath(), "bitmsghash", "bitmsghash.so")):
             init()
             notifyBuild(True)