Added conditional build arg for OSX6+ support

Author: dwasyluk

syscoin-qt.pro

@@ -35,17 +35,22 @@ UI_DIR = build
 
 # use: qmake "RELEASE=1"
 contains(RELEASE, 1) {
-    # Mac: compile for maximum compatibility (10.6, 32-bit + 64bit)
-    macx:QMAKE_CXXFLAGS += -mmacosx-version-min=10.6 -arch i386 -arch x86_64 -isysroot /Developer/SDKs/MacOSX10.6.sdk
-    macx:QMAKE_CFLAGS += -mmacosx-version-min=10.6 -arch i386 -arch x86_64 -isysroot /Developer/SDKs/MacOSX10.6.sdk
-    macx:QMAKE_OBJECTIVE_CFLAGS += -mmacosx-version-min=10.6 -arch i386 -arch x86_64 -isysroot /Developer/SDKs/MacOSX10.6.sdk
+
+    # use: qmake "OSX6=1"
+    contains(OSX6, 1) {
+        # Mac: compile for maximum compatibility (10.6, 32-bit + 64bit)
+        macx:QMAKE_CXXFLAGS += -mmacosx-version-min=10.6 -arch i386 -arch x86_64 -isysroot /Developer/SDKs/MacOSX10.6.sdk
+        macx:QMAKE_CFLAGS += -mmacosx-version-min=10.6 -arch i386 -arch x86_64 -isysroot /Developer/SDKs/MacOSX10.6.sdk
+        macx:QMAKE_OBJECTIVE_CFLAGS += -mmacosx-version-min=10.6 -arch i386 -arch x86_64 -isysroot /Developer/SDKs/MacOSX10.6.sdk
+    }
 
     !win32:!macx {
         # Linux: static link and extra security (see: https://wiki.debian.org/Hardening)
         LIBS += -Wl,-Bstatic -Wl,-z,relro -Wl,-z,now
     }
 }
 
+
 !win32 {
     # for extra security against potential buffer overflows: enable GCCs Stack Smashing Protection
     QMAKE_CXXFLAGS *= -fstack-protector-all