Merge pull request #723 from wenweihu86/master

fix build  scripts under mac os env and add building section for README

config_brpc.sh

@@ -136,12 +136,16 @@ find_dir_of_header_or_die() {
     $ECHO $dir
 }
 
-# User specified path of openssl, if not given it's empty
-OPENSSL_LIB=$(find_dir_of_lib ssl)
-
-# Inconvenient to check these headers in baidu-internal
-#PTHREAD_HDR=$(find_dir_of_header_or_die pthread.h)
-OPENSSL_HDR=$(find_dir_of_header_or_die openssl/ssl.h)
+if [ "$SYSTEM" = "Darwin" ]; then
+    OPENSSL_LIB="/usr/local/opt/openssl/lib"
+    OPENSSL_HDR="/usr/local/opt/openssl/include"
+else
+    # User specified path of openssl, if not given it's empty
+    OPENSSL_LIB=$(find_dir_of_lib ssl)
+    # Inconvenient to check these headers in baidu-internal
+    #PTHREAD_HDR=$(find_dir_of_header_or_die pthread.h)
+    OPENSSL_HDR=$(find_dir_of_header_or_die openssl/ssl.h)
+fi
 
 if [ $WITH_MESALINK != 0 ]; then
     MESALINK_HDR=$(find_dir_of_header_or_die mesalink/openssl/ssl.h)