Modify scons scripts to be able to compile on macOS with brew packages.

SConstruct

@@ -107,7 +107,11 @@ class FreelanEnvironment(Environment):
             self.Append(CXXFLAGS=['-arch', 'x86_64'])
             self.Append(CXXFLAGS=['-DBOOST_ASIO_DISABLE_KQUEUE'])
             self.Append(CXXFLAGS=['--stdlib=libc++'])
+            self.Append(CXXFLAGS=['-I/usr/local/opt/openssl/include'])
+            self.Append(CFLAGS=['-I/usr/local/opt/openssl/include'])
             self.Append(LDFLAGS=['--stdlib=libc++'])
+            self.Append(LDFLAGS=['-L/usr/local/opt/openssl/lib'])
+            self.Append(LIBPATH=['/usr/local/opt/openssl/lib'])
 
         if self.mode == 'debug':
             self.Append(CXXFLAGS=['-g'])

apps/freelan/SConscript

@@ -13,7 +13,6 @@ libraries = [
     'kfather',
     'iconvplus',
     'boost_system',
-    'boost_thread',
     'boost_filesystem',
     'boost_date_time',
     'boost_program_options',
@@ -23,6 +22,15 @@ libraries = [
     'crypto',
 ]
 
+if sys.platform.startswith('darwin'):
+    libraries.extend([
+        'boost_thread-mt',
+    ])
+else:
+    libraries.extend([
+        'boost_thread',
+    ])
+
 if sys.platform.startswith('linux'):
     libraries.extend([
         'pthread',