fix compilation target issue when run from MacOS

Author: zamronypj

build.cfg.sample

@@ -19,6 +19,7 @@
 # win64 : Windows 64 (not tested yet)
 # win32 : Windows 32 (not tested yet)
 # freebsd : FreeBSD
+# darwin : MacOS
 #----------------------------------------------
 -Tlinux
 

tools/config.setup.sh

@@ -20,4 +20,6 @@ if [["$OSTYPE" == "freebsd"*]]; then
     sed -i '' 's/\-Tlinux/\-Tfreebsd/g' build.cfg
 elif [["$OSTYPE" == "msys"*]]; then
     sed -i '' 's/\-Tlinux/\-Twin64/g' build.cfg
+elif [["$OSTYPE" == "darwin"*]]; then
+    sed -i '' 's/\-Tlinux/\-Tdarwin/g' build.cfg
 fi