Universal binary build for Mac

Author: cmaglie

Makefile

@@ -79,8 +79,8 @@ endif
 #
 ifeq ($(OS),Darwin)
 COMMON_SRCS+=PosixSerialPort.cpp OSXPortFactory.cpp
-COMMON_CXXFLAGS=-arch i386
-COMMON_LDFLAGS=-arch i386
+COMMON_CXXFLAGS=-arch i386 -arch x86_64 -mmacosx-version-min=10.5
+COMMON_LDFLAGS=-arch i386 -arch x86_64 -mmacosx-version-min=10.5
 APP=BOSSA.app
 DMG=bossa-$(VERSION).dmg
 VOLUME=BOSSA