diff --git a/trunk/auto/depends.sh b/trunk/auto/depends.sh
index 542000567..a8349ce8e 100755
--- a/trunk/auto/depends.sh
+++ b/trunk/auto/depends.sh
@@ -376,13 +376,13 @@ fi
 # state-threads
 #####################################################################################
 # check the cross build flag file, if flag changed, need to rebuild the st.
-_ST_MAKE=linux-debug && _ST_EXTRA_CFLAGS="-O0" && _ST_LD=${SRS_TOOL_LD} && _ST_OBJ="LINUX_`uname -r`_DBG"
+_ST_MAKE=linux-debug && _ST_EXTRA_CFLAGS="-O0" && _ST_OBJ="LINUX_`uname -r`_DBG"
 if [[ $SRS_VALGRIND == YES ]]; then
     _ST_EXTRA_CFLAGS="$_ST_EXTRA_CFLAGS -DMD_VALGRIND"
 fi
 # for osx, use darwin for st, donot use epoll.
 if [[ $SRS_OSX == YES ]]; then
-    _ST_MAKE=darwin-debug && _ST_EXTRA_CFLAGS="-DMD_HAVE_KQUEUE" && _ST_LD=${SRS_TOOL_CC} && _ST_OBJ="DARWIN_`uname -r`_DBG"
+    _ST_MAKE=darwin-debug && _ST_EXTRA_CFLAGS="-DMD_HAVE_KQUEUE" && _ST_OBJ="DARWIN_`uname -r`_DBG"
 fi
 # Whether enable debug stats.
 if [[ $SRS_DEBUG_STATS == YES ]]; then
@@ -417,7 +417,7 @@ else
         done &&
         # Build source code.
         make ${_ST_MAKE} EXTRA_CFLAGS="${_ST_EXTRA_CFLAGS}" \
-            CC=${SRS_TOOL_CC} AR=${SRS_TOOL_AR} LD=${_ST_LD} RANDLIB=${SRS_TOOL_RANDLIB} &&
+            CC=${SRS_TOOL_CC} AR=${SRS_TOOL_AR} LD=${SRS_TOOL_LD} RANDLIB=${SRS_TOOL_RANDLIB} &&
         cd .. && rm -rf st && ln -sf st-srs/${_ST_OBJ} st
     )
 fi
diff --git a/trunk/auto/options.sh b/trunk/auto/options.sh
index a2d5aa427..0be16ca6f 100755
--- a/trunk/auto/options.sh
+++ b/trunk/auto/options.sh
@@ -398,6 +398,10 @@ function apply_auto_options() {
       echo "For cross build, host: $SRS_CROSS_BUILD_HOST, prefix: $SRS_CROSS_BUILD_PREFIX, armv7: $SRS_CROSS_BUILD_ARMV7, aarch64: $SRS_CROSS_BUILD_AARCH64"
     fi
 
+    if [[ $SRS_OSX == YES ]]; then
+      SRS_TOOL_LD=$SRS_TOOL_CC
+    fi
+
     # The SRT code in SRS requires c++11, although we build libsrt without c++11.
     # TODO: FIXME: Remove c++11 code in SRT of SRS.
     if [[ $SRS_SRT == YES ]]; then