diff --git a/trunk/auto/apps.sh b/trunk/auto/apps.sh
old mode 100755
new mode 100644
diff --git a/trunk/auto/build_ffmpeg.sh b/trunk/auto/build_ffmpeg.sh
index 8dd566b84..551ed683d 100755
--- a/trunk/auto/build_ffmpeg.sh
+++ b/trunk/auto/build_ffmpeg.sh
@@ -2,6 +2,11 @@
 
 ff_src_dir="../../3rdparty"
 
+# the jobs to make ffmpeg
+if [[ "" -eq SRS_JOBS ]]; then 
+    export SRS_JOBS="--jobs=1" 
+fi
+
 ff_current_dir=$(pwd -P)
 ff_build_dir="${ff_current_dir}/_build"
 ff_release_dir="${ff_current_dir}/_release"
@@ -9,6 +14,7 @@ echo "start to build the tools for transcode system:"
 echo "current_dir: ${ff_current_dir}"
 echo "build_dir: ${ff_build_dir}"
 echo "release_dir: ${ff_release_dir}"
+echo "SRS_JOBS: ${SRS_JOBS}"
 
 mkdir -p ${ff_build_dir}
 mkdir -p ${ff_release_dir}
@@ -22,7 +28,7 @@ else
     cd $ff_current_dir &&
     rm -rf yasm-1.2.0 && unzip -q ${ff_src_dir}/yasm-1.2.0.zip &&
     cd yasm-1.2.0 && ./configure --prefix=${ff_release_dir} &&
-    make && make install
+    make ${SRS_JOBS} && make install
     ret=$?; if [[ 0 -ne ${ret} ]]; then echo "build yasm-1.2.0 failed"; exit 1; fi
 fi
 # add yasm to path, for x264 to use yasm directly.
@@ -37,7 +43,7 @@ else
     cd $ff_current_dir &&
     rm -rf libaacplus-2.0.2 && unzip -q ${ff_src_dir}/libaacplus-2.0.2.zip &&
     cd libaacplus-2.0.2 && cp ../${ff_src_dir}/libaacplus-patch-26410-800.zip src/26410-800.zip &&
-    bash autogen.sh && ./configure --prefix=${ff_release_dir} --enable-static && make && make install
+    bash autogen.sh && ./configure --prefix=${ff_release_dir} --enable-static && make ${SRS_JOBS} && make install
     ret=$?; if [[ 0 -ne ${ret} ]]; then echo "build libaacplus-2.0.2 failed"; exit 1; fi
 fi
 
@@ -48,7 +54,7 @@ else
     echo "build lame-3.99.5"
     cd $ff_current_dir &&
     rm -rf lame-3.99.5 && unzip -q ${ff_src_dir}/lame-3.99.5.zip &&
-    cd lame-3.99.5 && ./configure --prefix=${ff_release_dir} --enable-static && make && make install
+    cd lame-3.99.5 && ./configure --prefix=${ff_release_dir} --enable-static && make ${SRS_JOBS} && make install
     ret=$?; if [[ 0 -ne ${ret} ]]; then echo "build lame-3.99.5 failed"; exit 1; fi
 fi
 
@@ -61,7 +67,7 @@ else
     rm -rf x264-snapshot-20131129-2245-stable && unzip -q ${ff_src_dir}/x264-snapshot-20131129-2245-stable.zip &&
     cd x264-snapshot-20131129-2245-stable && 
     ./configure --prefix=${ff_release_dir} --disable-opencl --bit-depth=8 --enable-static && 
-    make && make install
+    make ${SRS_JOBS} && make install
     ret=$?; if [[ 0 -ne ${ret} ]]; then echo "build x264 failed"; exit 1; fi
 fi
 
@@ -90,6 +96,6 @@ else
         --enable-libx264 --enable-libmp3lame --enable-libaacplus \
         --enable-pthreads --extra-libs=-lpthread \
         --enable-encoders --enable-decoders --enable-avfilter --enable-muxers --enable-demuxers && 
-    make && make install
+    make ${SRS_JOBS} && make install
     ret=$?; if [[ 0 -ne ${ret} ]]; then echo "build ffmpeg failed"; exit 1; fi
 fi
diff --git a/trunk/auto/depends.sh b/trunk/auto/depends.sh
old mode 100755
new mode 100644
index 4ad84c5d4..784310b27
--- a/trunk/auto/depends.sh
+++ b/trunk/auto/depends.sh
@@ -183,7 +183,7 @@ else
         rm -rf ${SRS_OBJS}/st-1.9 && cd ${SRS_OBJS} && 
         unzip -q ../3rdparty/st-1.9.zip && cd st-1.9 && 
         patch -p1 < ../../3rdparty/1.st.arm.Makefile.patch && 
-        make linux-debug &&
+        make linux-debug ${SRS_JOBS}&&
         cd .. && rm -f st && ln -sf st-1.9/obj st
     )
 fi
@@ -205,7 +205,7 @@ if [ $SRS_HTTP = YES ]; then
             cd http-parser-2.1 && 
             sed -i "s/CPPFLAGS_FAST +=.*$/CPPFLAGS_FAST = \$\(CPPFLAGS_DEBUG\)/g" Makefile &&
             sed -i "s/CFLAGS_FAST =.*$/CFLAGS_FAST = \$\(CFLAGS_DEBUG\)/g" Makefile &&
-            make package &&
+            make package ${SRS_JOBS} &&
             cd .. && rm -f hp && ln -sf http-parser-2.1 hp
         )
     fi
@@ -236,7 +236,7 @@ if [ $SRS_HLS = YES ]; then
         (
             rm -rf ${SRS_OBJS}/nginx-1.5.7 && cd ${SRS_OBJS} && 
             unzip -q ../3rdparty/nginx-1.5.7.zip && cd nginx-1.5.7 && 
-            ./configure --prefix=`pwd`/_release && make && make install &&
+            ./configure --prefix=`pwd`/_release && make ${SRS_JOBS} && make install &&
             cd .. && ln -sf nginx-1.5.7/_release nginx
         )
     fi
@@ -352,7 +352,7 @@ if [ $SRS_SSL = YES ]; then
             rm -rf ${SRS_OBJS}/openssl-1.0.1f && cd ${SRS_OBJS} && 
             unzip -q ../3rdparty/openssl-1.0.1f.zip && cd openssl-1.0.1f && 
             ./config --prefix=`pwd`/_release -no-shared && 
-            make && make install &&
+            make ${SRS_JOBS} && make install &&
             cd .. && ln -sf openssl-1.0.1f/_release openssl
         )
     fi
@@ -399,10 +399,10 @@ fi
 if [ $SRS_RESEARCH = YES ]; then
     mkdir -p ${SRS_OBJS}/research
 
-    (cd research/hls && make && mv ts_info ../../${SRS_OBJS}/research)
+    (cd research/hls && make ${SRS_JOBS} && mv ts_info ../../${SRS_OBJS}/research)
     ret=$?; if [[ $ret -ne 0 ]]; then echo "build research/hls failed, ret=$ret"; exit $ret; fi
 
-    (cd research/ffempty && make && mv ffempty ../../${SRS_OBJS}/research)
+    (cd research/ffempty && make ${SRS_JOBS} && mv ffempty ../../${SRS_OBJS}/research)
     ret=$?; if [[ $ret -ne 0 ]]; then echo "build research/ffempty failed, ret=$ret"; exit $ret; fi
 fi
 
@@ -412,9 +412,9 @@ fi
 if [ $SRS_UTEST = YES ]; then
     mkdir -p ${SRS_OBJS}/utest
 
-    (cd research/hls && make && mv ts_info ../../${SRS_OBJS}/research)
+    (cd research/hls && make ${SRS_JOBS} && mv ts_info ../../${SRS_OBJS}/research)
     ret=$?; if [[ $ret -ne 0 ]]; then echo "build research/hls failed, ret=$ret"; exit $ret; fi
 
-    (cd research/ffempty && make && mv ffempty ../../${SRS_OBJS}/research)
+    (cd research/ffempty && make ${SRS_JOBS} && mv ffempty ../../${SRS_OBJS}/research)
     ret=$?; if [[ $ret -ne 0 ]]; then echo "build research/ffempty failed, ret=$ret"; exit $ret; fi
 fi
diff --git a/trunk/auto/generate_header.sh b/trunk/auto/generate_header.sh
old mode 100755
new mode 100644
diff --git a/trunk/auto/libs.sh b/trunk/auto/libs.sh
old mode 100755
new mode 100644
diff --git a/trunk/auto/modules.sh b/trunk/auto/modules.sh
old mode 100755
new mode 100644
diff --git a/trunk/auto/options.sh b/trunk/auto/options.sh
old mode 100755
new mode 100644
index e66729742..129973eab
--- a/trunk/auto/options.sh
+++ b/trunk/auto/options.sh
@@ -17,6 +17,8 @@ SRS_FFMPEG=RESERVED
 SRS_HTTP=RESERVED
 SRS_RESEARCH=RESERVED
 SRS_UTEST=RESERVED
+# arguments
+SRS_JOBS=1
 
 # TODO: remove the default to yes.
 SRS_HLS=YES
@@ -36,7 +38,10 @@ do
     opt="$opt `echo $option | sed -e \"s/\(--[^=]*=\)\(.* .*\)/\1'\2'/\"`"
 
     case "$option" in
-        -*=*) value=`echo "$option" | sed -e 's/[-_a-zA-Z0-9]*=//'` ;;
+        -*=*) 
+            value=`echo "$option" | sed -e 's/[-_a-zA-Z0-9]*=//'` 
+            option=`echo "$option" | sed -e 's/=[-_a-zA-Z0-9]*//'`
+        ;;
            *) value="" ;;
     esac
 
@@ -56,6 +61,8 @@ do
         --without-http)                 SRS_HTTP=NO               ;;
         --without-research)             SRS_RESEARCH=NO           ;;
         --without-utest)                SRS_UTEST=NO              ;;
+        
+        --jobs)                         SRS_JOBS=${value}         ;;
 
         *)
             echo "$0: error: invalid option \"$option\""
@@ -64,6 +71,13 @@ do
     esac
 done
 
+# parse the jobs for make
+if [[ "" -eq SRS_JOBS ]]; then 
+    export SRS_JOBS="--jobs" 
+else
+    export SRS_JOBS="--jobs=${SRS_JOBS}"
+fi
+
 # save all config options to macro to write to auto headers file
 SRS_CONFIGURE="$opt"
 
@@ -90,6 +104,9 @@ if [ $help = yes ]; then
   --without-ffmpeg         disable the ffmpeg transcoding feature.
   --without-research       do not build the research tools.
   --without-utest          do not build the utest for srs.
+  
+  --jobs[=N]               Allow N jobs at once; infinite jobs with no arg.
+                           used for make in the configure, for example, to make ffmpeg.
 
 END
     exit 0
diff --git a/trunk/configure b/trunk/configure
index ac5a3deea..034de0b0b 100755
--- a/trunk/configure
+++ b/trunk/configure
@@ -49,7 +49,7 @@ echo "" >> $SRS_AUTO_HEADERS_H
 # srs-librtmp sample entry
 SrsLibrtmpSampleEntry="nossl"; if [ $SRS_SSL = YES ]; then SrsLibrtmpSampleEntry="ssl";fi
 # utest make entry, (cd utest; make)
-SrsUtestMakeEntry="@echo -e \"ignore utest for it's disabled\""; if [ $SRS_UTEST = YES ]; then SrsUtestMakeEntry="(cd utest; make)"; fi
+SrsUtestMakeEntry="@echo -e \"ignore utest for it's disabled\""; if [ $SRS_UTEST = YES ]; then SrsUtestMakeEntry="(cd utest; \$(MAKE))"; fi
 
 #####################################################################################
 # colorful summary
@@ -73,7 +73,7 @@ GREEN="\\${GREEN}"
 YELLOW="\\${YELLOW}"
 BLACK="\\${BLACK}"
 
-default: server bandwidth librtmp librtmp-sample utest
+default: bandwidth librtmp-sample utest
 	@echo -e "\$(GREEN)build summary:\$(BLACK)"
 	@echo -e "     \$(GREEN)server:          ./objs/srs, the srs server\$(BLACK)"
 	@echo -e "          ${SrsHlsSummaryColor}hls: delivery HLS stream, @see: https://github.com/winlinvip/simple-rtmp-server/wiki/DeliveryHLS\$(BLACK)"
@@ -108,20 +108,20 @@ server: _prepare_dir
 	@echo "build the srs(simple rtmp server) over st(state-threads)"
 	\$(MAKE) -f ${SRS_OBJS}/${SRS_MAKEFILE} srs
 
-bandwidth: _prepare_dir
+bandwidth: server
 	@echo "build the bandwidth test client tool"
 	\$(MAKE) -f ${SRS_OBJS}/${SRS_MAKEFILE} bandwidth
 
-librtmp: _prepare_dir
+librtmp: server
 	@echo "build the client publish/play library."
 	\$(MAKE) -f ${SRS_OBJS}/${SRS_MAKEFILE} librtmp
 
-librtmp-sample:
+librtmp-sample: librtmp
 	@echo "build the srs-librtmp sample"
-	(cd research/librtmp; make ${SrsLibrtmpSampleEntry})
+	(cd research/librtmp; \$(MAKE) ${SrsLibrtmpSampleEntry})
 	@echo "srs-librtmp sample build success"
 
-utest:
+utest: server
 	@echo "build the utest for srs"
 	${SrsUtestMakeEntry}
 	@echo "utest for srs build success"
@@ -154,7 +154,7 @@ AR ?= ar
 CXXFLAGS = ${CXXFLAGS}
 LINK = g++
 
-.PHONY: default srs bandwidth 
+.PHONY: default srs bandwidth librtmp
 
 default: