srs/trunk/auto/depends.sh

#!/bin/bash

# variables, parent script must set it:
# SRS_JOBS: the build jobs.
# SrsArmMakeOptions: the arm make options for ubuntu12(armhf, v7cpu)

#####################################################################################
#####################################################################################
# prepare the depends tools and libraries
# DEPENDS: options.sh, only when user options parsed, the depends tools are known.
#####################################################################################
#####################################################################################

#####################################################################################
# utilities
#####################################################################################
function require_sudoer()
{
    sudo echo "" >/dev/null 2>&1
    
    ret=$?; if [[ 0 -ne $ret ]]; then 
        echo "\"$1\" require sudoer failed. ret=$ret";
        exit $ret; 
    fi
}

# TODO: check gcc/g++
echo "Checking gcc/g++/gdb/make."
echo "Required tools are ok."
#####################################################################################
# for Ubuntu, auto install tools by apt-get
#####################################################################################
OS_IS_UBUNTU=NO
function Ubuntu_prepare()
{
    if [ $SRS_CUBIE = YES ]; then
        echo "For cubieboard, please use ubuntu prepare."
    else
        uname -v|grep Ubuntu >/dev/null 2>&1
        ret=$?; if [[ 0 -ne $ret ]]; then
            # for debian, we think it's ubuntu also.
            # for example, the wheezy/sid which is debian armv7 linux, can not identified by uname -v.
            if [[ ! -f /etc/debian_version ]]; then
                return 0;
            fi
        fi
    fi

    OS_IS_UBUNTU=YES
    echo "Installing tools for Ubuntu."
    
    gcc --help >/dev/null 2>&1; ret=$?; if [[ 0 -ne $ret ]]; then
        echo "Installing gcc."
        require_sudoer "sudo apt-get install -y --force-yes gcc"
        sudo apt-get install -y --force-yes gcc; ret=$?; if [[ 0 -ne $ret ]]; then return $ret; fi
        echo "The gcc is installed."
    fi
    
    g++ --help >/dev/null 2>&1; ret=$?; if [[ 0 -ne $ret ]]; then
        echo "Installing g++."
        require_sudoer "sudo apt-get install -y --force-yes g++"
        sudo apt-get install -y --force-yes g++; ret=$?; if [[ 0 -ne $ret ]]; then return $ret; fi
        echo "The g++ is installed."
    fi
    
    make --help >/dev/null 2>&1; ret=$?; if [[ 0 -ne $ret ]]; then
        echo "Installing make."
        require_sudoer "sudo apt-get install -y --force-yes make"
        sudo apt-get install -y --force-yes make; ret=$?; if [[ 0 -ne $ret ]]; then return $ret; fi
        echo "The make is installed."
    fi
    
    patch --help >/dev/null 2>&1; ret=$?; if [[ 0 -ne $ret ]]; then
        echo "Installing patch."
        require_sudoer "sudo apt-get install -y --force-yes patch"
        sudo apt-get install -y --force-yes patch; ret=$?; if [[ 0 -ne $ret ]]; then return $ret; fi
        echo "The patch is installed."
    fi
    
    unzip --help >/dev/null 2>&1; ret=$?; if [[ 0 -ne $ret ]]; then
        echo "Installing unzip."
        require_sudoer "sudo apt-get install -y --force-yes unzip"
        sudo apt-get install -y --force-yes unzip; ret=$?; if [[ 0 -ne $ret ]]; then return $ret; fi
        echo "The unzip is installed."
    fi

    if [[ $SRS_VALGRIND == YES ]]; then
        valgrind --help >/dev/null 2>&1; ret=$?; if [[ 0 -ne $ret ]]; then
            echo "Installing valgrind."
            require_sudoer "sudo apt-get install -y --force-yes valgrind"
            sudo apt-get install -y --force-yes valgrind; ret=$?; if [[ 0 -ne $ret ]]; then return $ret; fi
            echo "The valgrind is installed."
        fi
    fi

    if [[ $SRS_VALGRIND == YES ]]; then
        if [[ ! -f /usr/include/valgrind/valgrind.h ]]; then
            echo "Installing valgrind-dev."
            require_sudoer "sudo apt-get install -y --force-yes valgrind-dbg"
            sudo apt-get install -y --force-yes valgrind-dev; ret=$?; if [[ 0 -ne $ret ]]; then return $ret; fi
            echo "The valgrind-dev is installed."
        fi
    fi
    
    echo "Tools for Ubuntu are installed."
    return 0
}
# donot prepare tools, for srs-librtmp depends only gcc and g++.
if [ $SRS_EXPORT_LIBRTMP_PROJECT = NO ]; then
    Ubuntu_prepare; ret=$?; if [[ 0 -ne $ret ]]; then echo "Install tools for ubuntu failed, ret=$ret"; exit $ret; fi
fi

#####################################################################################
# for Centos, auto install tools by yum
#####################################################################################
OS_IS_CENTOS=NO
function Centos_prepare()
{
    if [[ ! -f /etc/redhat-release ]]; then
        return 0;
    fi

    OS_IS_CENTOS=YES
    echo "Installing tools for Centos."
    
    gcc --help >/dev/null 2>&1; ret=$?; if [[ 0 -ne $ret ]]; then
        echo "Installing gcc."
        require_sudoer "sudo yum install -y gcc"
        sudo yum install -y gcc; ret=$?; if [[ 0 -ne $ret ]]; then return $ret; fi
        echo "The gcc is installed."
    fi
    
    g++ --help >/dev/null 2>&1; ret=$?; if [[ 0 -ne $ret ]]; then
        echo "Installing gcc-c++."
        require_sudoer "sudo yum install -y gcc-c++"
        sudo yum install -y gcc-c++; ret=$?; if [[ 0 -ne $ret ]]; then return $ret; fi
        echo "The gcc-c++ is installed."
    fi
    
    make --help >/dev/null 2>&1; ret=$?; if [[ 0 -ne $ret ]]; then
        echo "Installing make."
        require_sudoer "sudo yum install -y make"
        sudo yum install -y make; ret=$?; if [[ 0 -ne $ret ]]; then return $ret; fi
        echo "The make is installed."
    fi
    
    patch --help >/dev/null 2>&1; ret=$?; if [[ 0 -ne $ret ]]; then
        echo "Installing patch."
        require_sudoer "sudo yum install -y patch"
        sudo yum install -y patch; ret=$?; if [[ 0 -ne $ret ]]; then return $ret; fi
        echo "The patch is installed."
    fi
    
    unzip --help >/dev/null 2>&1; ret=$?; if [[ 0 -ne $ret ]]; then
        echo "Installing unzip."
        require_sudoer "sudo yum install -y unzip"
        sudo yum install -y unzip; ret=$?; if [[ 0 -ne $ret ]]; then return $ret; fi
        echo "The unzip is installed."
    fi

    if [[ $SRS_VALGRIND == YES ]]; then
        valgrind --help >/dev/null 2>&1; ret=$?; if [[ 0 -ne $ret ]]; then
            echo "Installing valgrind."
            require_sudoer "sudo yum install -y valgrind"
            sudo yum install -y valgrind; ret=$?; if [[ 0 -ne $ret ]]; then return $ret; fi
            echo "The valgrind is installed."
        fi
    fi

    if [[ $SRS_VALGRIND == YES ]]; then
        if [[ ! -f /usr/include/valgrind/valgrind.h ]]; then
            echo "Installing valgrind-devel."
            require_sudoer "sudo yum install -y valgrind-devel"
            sudo yum install -y valgrind-devel; ret=$?; if [[ 0 -ne $ret ]]; then return $ret; fi
            echo "The valgrind-devel is installed."
        fi
    fi
    
    echo "Tools for Centos are installed."
    return 0
}
# donot prepare tools, for srs-librtmp depends only gcc and g++.
if [ $SRS_EXPORT_LIBRTMP_PROJECT = NO ]; then
    Centos_prepare; ret=$?; if [[ 0 -ne $ret ]]; then echo "Install tools for CentOS failed, ret=$ret"; exit $ret; fi
fi

#####################################################################################
# For OSX, auto install tools by brew
#####################################################################################
OS_IS_OSX=NO
function OSX_prepare()
{
    uname -s|grep Darwin >/dev/null 2>&1
    ret=$?; if [[ 0 -ne $ret ]]; then
        if [ $SRS_OSX = YES ]; then
            echo "OSX check failed, actual is `uname -s`"
            exit 1;
        fi
        return 0;
    fi

    # cross build for arm, install the cross build tool chain.
    if [ $SRS_CROSS_BUILD = YES ]; then
        echo "embeded(arm/mips) is invalid for OSX"
        return 1
    fi

    OS_IS_OSX=YES
    echo "OSX detected, install tools if needed"
    # requires the osx when os
    if [ $OS_IS_OSX = YES ]; then
        if [ $SRS_OSX = NO ]; then
            echo "OSX detected, must specifies the --osx"
            exit 1
        fi
    fi

    brew --help >/dev/null 2>&1; ret=$?; if [[ 0 -ne $ret ]]; then
        echo "install brew"
        echo "ruby -e \"$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)\""
        ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"; ret=$?; if [[ 0 -ne $ret ]]; then return $ret; fi
        echo "install brew success"
    fi

    gcc --help >/dev/null 2>&1; ret=$?; if [[ 0 -ne $ret ]]; then
        echo "install gcc"
        echo "brew install gcc"
        brew install gcc; ret=$?; if [[ 0 -ne $ret ]]; then return $ret; fi
        echo "install gcc success"
    fi

    g++ --help >/dev/null 2>&1; ret=$?; if [[ 0 -ne $ret ]]; then
        echo "install gcc-c++"
        echo "brew install gcc-c++"
        brew install gcc-c++; ret=$?; if [[ 0 -ne $ret ]]; then return $ret; fi
        echo "install gcc-c++ success"
    fi

    make --help >/dev/null 2>&1; ret=$?; if [[ 0 -ne $ret ]]; then
        echo "install make"
        echo "brew install make"
        brew install make; ret=$?; if [[ 0 -ne $ret ]]; then return $ret; fi
        echo "install make success"
    fi

    patch --help >/dev/null 2>&1; ret=$?; if [[ 0 -ne $ret ]]; then
        echo "install patch"
        echo "brew install patch"
        brew install patch; ret=$?; if [[ 0 -ne $ret ]]; then return $ret; fi
        echo "install patch success"
    fi

    unzip --help >/dev/null 2>&1; ret=$?; if [[ 0 -ne $ret ]]; then
        echo "install unzip"
        echo "brew install unzip"
        brew install unzip; ret=$?; if [[ 0 -ne $ret ]]; then return $ret; fi
        echo "install unzip success"
    fi

    echo "OSX install tools success"
    return 0
}
# donot prepare tools, for srs-librtmp depends only gcc and g++.
if [ $SRS_EXPORT_LIBRTMP_PROJECT = NO ]; then
    OSX_prepare; ret=$?; if [[ 0 -ne $ret ]]; then echo "OSX prepare failed, ret=$ret"; exit $ret; fi
fi

#####################################################################################
# for Centos, auto install tools by yum
#####################################################################################
# We must use a bash function instead of variable.
function sed_utility() {
    if [ $OS_IS_OSX = YES ]; then
        sed -i '' "$@"
    else
        sed -i "$@"
    fi

    ret=$?; if [[ $ret -ne 0 ]]; then
        if [ $OS_IS_OSX = YES ]; then
            echo "sed -i '' \"$@\""
        else
            echo "sed -i \"$@\""
        fi
        return $ret
    fi
}
SED="sed_utility" && echo "SED is $SED"

#####################################################################################
# check the os.
#####################################################################################
# Only supports:
#       linux, centos/ubuntu as such,
#       cross build for embeded system, for example, mips or arm,
#       directly build on arm/mips, for example, pi or cubie,
#       export srs-librtmp
# others is invalid.
if [[ $OS_IS_UBUNTU = NO && $OS_IS_CENTOS = NO && $OS_IS_OSX = NO && $SRS_EXPORT_LIBRTMP_PROJECT = NO ]]; then
    if [[ $SRS_PI = NO && $SRS_CUBIE = NO && $SRS_CROSS_BUILD = NO ]]; then
        echo "Your OS `uname -s` is not supported."
        exit 1
    fi
fi

#####################################################################################
# state-threads
#####################################################################################
if [ $SRS_EXPORT_LIBRTMP_PROJECT = NO ]; then
    # check the cross build flag file, if flag changed, need to rebuild the st.
    _ST_MAKE=linux-debug && _ST_EXTRA_CFLAGS="-DMD_HAVE_EPOLL" && _ST_LD=${SRS_TOOL_LD} && _ST_OBJ="LINUX_*"
    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_*"
    fi
    # Always alloc on heap, @see https://github.com/ossrs/srs/issues/509#issuecomment-719931676
    _ST_EXTRA_CFLAGS="$_ST_EXTRA_CFLAGS -DMALLOC_STACK"
    # Pass the global extra flags.
    if [[ $SRS_EXTRA_FLAGS != '' ]]; then
      _ST_EXTRA_CFLAGS="$_ST_EXTRA_CFLAGS $SRS_EXTRA_FLAGS"
    fi
    # Patched ST from https://github.com/ossrs/state-threads/tree/srs
    if [[ -f ${SRS_OBJS}/${SRS_PLATFORM}/st/libst.a ]]; then
        echo "The state-threads is ok.";
    else
        echo "Building state-threads.";
        (
            rm -rf ${SRS_OBJS}/${SRS_PLATFORM}/st-srs && mkdir -p ${SRS_OBJS}/${SRS_PLATFORM}/st-srs &&
            # Create a hidden directory .src
            cd ${SRS_OBJS}/${SRS_PLATFORM}/st-srs && ln -sf ../../../3rdparty/st-srs .src &&
            # Link source files under .src
            for file in `(cd .src && find . -maxdepth 1 -type f ! -name '*.o' ! -name '*.d')`; do
                ln -sf .src/$file $file;
            done &&
            # Link source files under .src/xxx, the first child dir.
            for dir in `(cd .src && find . -maxdepth 1 -type d|grep '\./'|grep -v Linux|grep -v Darwin)`; do
                mkdir -p $dir &&
                for file in `(cd .src/$dir && find . -maxdepth 1 -type f ! -name '*.o' ! -name '*.d')`; do
                    ln -sf ../.src/$dir/$file $dir/$file;
                done;
            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} &&
            cd .. && rm -f st && ln -sf st-srs/${_ST_OBJ} st
        )
    fi
    # check status
    ret=$?; if [[ $ret -ne 0 ]]; then echo "Build state-threads failed, ret=$ret"; exit $ret; fi
    # Always update the links.
    (cd ${SRS_OBJS} && rm -rf st && ln -sf ${SRS_PLATFORM}/st-srs/${_ST_OBJ} st)
    if [ ! -f ${SRS_OBJS}/st/libst.a ]; then echo "Build state-threads static lib failed."; exit -1; fi
fi

#####################################################################################
# nginx for HLS, nginx-1.5.0
#####################################################################################
function write_nginx_html5()
{
    cat<<END > ${html_file}
<video autoplay controls autobuffer type="application/vnd.apple.mpegurl"
    src="${hls_stream}">
</video>
END
}
# create the nginx dir, for http-server if not build nginx
if [ $SRS_EXPORT_LIBRTMP_PROJECT = NO ]; then
    mkdir -p ${SRS_OBJS}/nginx
fi

# the demo dir.
if [ $SRS_EXPORT_LIBRTMP_PROJECT = NO ]; then
    # create forward dir
    mkdir -p ${SRS_OBJS}/nginx/html/live &&
    mkdir -p ${SRS_OBJS}/nginx/html/forward/live

    # generate default html pages for android.
    html_file=${SRS_OBJS}/nginx/html/live/demo.html && hls_stream=demo.m3u8 && write_nginx_html5
    html_file=${SRS_OBJS}/nginx/html/live/livestream.html && hls_stream=livestream.m3u8 && write_nginx_html5
    html_file=${SRS_OBJS}/nginx/html/live/livestream_ld.html && hls_stream=livestream_ld.m3u8 && write_nginx_html5
    html_file=${SRS_OBJS}/nginx/html/live/livestream_sd.html && hls_stream=livestream_sd.m3u8 && write_nginx_html5
    html_file=${SRS_OBJS}/nginx/html/forward/live/livestream.html && hls_stream=livestream.m3u8 && write_nginx_html5
    html_file=${SRS_OBJS}/nginx/html/forward/live/livestream_ld.html && hls_stream=livestream_ld.m3u8 && write_nginx_html5
    html_file=${SRS_OBJS}/nginx/html/forward/live/livestream_sd.html && hls_stream=livestream_sd.m3u8 && write_nginx_html5

    # copy players to nginx html dir.
    rm -rf ${SRS_OBJS}/nginx/html/players &&
    ln -sf `pwd`/research/players ${SRS_OBJS}/nginx/html/players &&
    rm -f ${SRS_OBJS}/nginx/crossdomain.xml &&
    ln -sf `pwd`/research/players/crossdomain.xml ${SRS_OBJS}/nginx/html/crossdomain.xml

    # for favicon.ico
    rm -rf ${SRS_OBJS}/nginx/html/favicon.ico &&
    ln -sf `pwd`/research/api-server/static-dir/favicon.ico ${SRS_OBJS}/nginx/html/favicon.ico

    # nginx.html to detect whether nginx is alive
    echo "Nginx is ok." > ${SRS_OBJS}/nginx/html/nginx.html
fi

#####################################################################################
# cherrypy for http hooks callback, CherryPy-3.2.4
#####################################################################################
if [ $SRS_EXPORT_LIBRTMP_PROJECT = NO ]; then
    if [[ -f ${SRS_OBJS}/${SRS_PLATFORM}/CherryPy-3.2.4/setup.py ]]; then
        echo "CherryPy-3.2.4 is ok.";
    else
        echo "Installing CherryPy-3.2.4";
        (
            rm -rf ${SRS_OBJS}/CherryPy-3.2.4 && cd ${SRS_OBJS}/${SRS_PLATFORM} &&
            unzip -q ../../3rdparty/CherryPy-3.2.4.zip && cd CherryPy-3.2.4 &&
            python setup.py install --user
        )
    fi
    # check status
    ret=$?; if [[ $ret -ne 0 ]]; then echo "build CherryPy-3.2.4 failed, ret=$ret"; exit $ret; fi
    if [ ! -f ${SRS_OBJS}/${SRS_PLATFORM}/CherryPy-3.2.4/setup.py ]; then echo "build CherryPy-3.2.4 failed."; exit -1; fi

    echo "Link players to cherrypy static-dir"
    rm -rf research/api-server/static-dir/players &&
    ln -sf `pwd`/research/players research/api-server/static-dir/players &&
    rm -f research/api-server/static-dir/crossdomain.xml &&
    ln -sf `pwd`/research/players/crossdomain.xml research/api-server/static-dir/crossdomain.xml &&
    rm -rf research/api-server/static-dir/live && 
    mkdir -p `pwd`/${SRS_OBJS}/nginx/html/live &&
    ln -sf `pwd`/${SRS_OBJS}/nginx/html/live research/api-server/static-dir/live &&
    rm -rf research/api-server/static-dir/forward && 
    mkdir -p `pwd`/${SRS_OBJS}/nginx/html/forward &&
    ln -sf `pwd`/${SRS_OBJS}/nginx/html/forward research/api-server/static-dir/forward
    ret=$?; if [[ $ret -ne 0 ]]; then echo "Warning: Ignore error to link players to cherrypy static-dir."; fi
fi

#####################################################################################
# openssl, for rtmp complex handshake and HLS encryption.
#####################################################################################
if [[ $SRS_SSL == YES && $SRS_USE_SYS_SSL == YES ]]; then
    echo "Warning: Use system libssl, without compiling openssl."
fi
# @see http://www.openssl.org/news/secadv/20140407.txt
# Affected users should upgrade to OpenSSL 1.1.0e. Users unable to immediately
# upgrade can alternatively recompile OpenSSL with -DOPENSSL_NO_HEARTBEATS.
if [[ $SRS_SSL == YES && $SRS_USE_SYS_SSL != YES ]]; then
    OPENSSL_OPTIONS="-no-shared -no-threads -no-asm -DOPENSSL_NO_HEARTBEATS"
    OPENSSL_CONFIG="./config"
    # https://stackoverflow.com/questions/15539062/cross-compiling-of-openssl-for-linux-arm-v5te-linux-gnueabi-toolchain
    if [[ $SRS_CROSS_BUILD == YES ]]; then
        OPENSSL_CONFIG="./Configure linux-armv4"
    elif [[ ! -f ${SRS_OBJS}/${SRS_PLATFORM}/openssl/lib/libssl.a ]]; then
        # Try to use exists libraries.
        if [[ -f /usr/local/ssl/lib/libssl.a ]]; then
            (mkdir -p  ${SRS_OBJS}/${SRS_PLATFORM}/openssl/lib && cd ${SRS_OBJS}/${SRS_PLATFORM}/openssl/lib &&
                ln -sf /usr/local/ssl/lib/libssl.a && ln -sf /usr/local/ssl/lib/libcrypto.a &&
                mkdir -p /usr/local/ssl/lib/pkgconfig && ln -sf /usr/local/ssl/lib/pkgconfig)
            (mkdir -p ${SRS_OBJS}/${SRS_PLATFORM}/openssl/include && cd ${SRS_OBJS}/${SRS_PLATFORM}/openssl/include &&
                ln -sf /usr/local/ssl/include/openssl)
        fi
    fi
    # Which lib we use.
    OPENSSL_LIB="openssl-1.1.0e/_release"
    if [[ ! -f ${SRS_OBJS}/${SRS_PLATFORM}/${OPENSSL_LIB}/lib/libssl.a ]]; then
        OPENSSL_LIB="openssl"
    fi
    # cross build not specified, if exists flag, need to rebuild for no-arm platform.
    if [[ -f ${SRS_OBJS}/${SRS_PLATFORM}/openssl/lib/libssl.a ]]; then
        echo "Openssl-1.1.0e is ok.";
    else
        echo "Building openssl-1.1.0e.";
        (
            rm -rf ${SRS_OBJS}/${SRS_PLATFORM}/openssl-1.1.0e && cd ${SRS_OBJS}/${SRS_PLATFORM} &&
            unzip -q ../../3rdparty/openssl-1.1.0e.zip && cd openssl-1.1.0e &&
            ${OPENSSL_CONFIG} --prefix=`pwd`/_release $OPENSSL_OPTIONS &&
            make CC=${SRS_TOOL_CC} AR="${SRS_TOOL_AR} -rs" LD=${SRS_TOOL_LD} RANDLIB=${SRS_TOOL_RANDLIB} && make install_sw &&
            cd .. && rm -rf openssl && ln -sf openssl-1.1.0e/_release openssl
        )
    fi
    # check status
    ret=$?; if [[ $ret -ne 0 ]]; then echo "Build openssl-1.1.0e failed, ret=$ret"; exit $ret; fi
    # Always update the links.
    (cd ${SRS_OBJS} && rm -rf openssl && ln -sf ${SRS_PLATFORM}/${OPENSSL_LIB} openssl)
    if [ ! -f ${SRS_OBJS}/openssl/lib/libssl.a ]; then echo "Build openssl-1.1.0e failed."; exit -1; fi
fi

#####################################################################################
# live transcoding, ffmpeg-4.1, x264-core157, lame-3.99.5, libaacplus-2.0.2.
#####################################################################################
# Always link the ffmpeg tools if exists.
if [[ -f /usr/local/bin/ffmpeg && ! -f ${SRS_OBJS}/${SRS_PLATFORM}/ffmpeg ]]; then
    mkdir -p ${SRS_OBJS}/${SRS_PLATFORM}/ffmpeg/bin &&
    ln -sf /usr/local/bin/ffmpeg ${SRS_OBJS}/${SRS_PLATFORM}/ffmpeg/bin/ffmpeg &&
    (cd ${SRS_OBJS} && rm -rf ffmpeg && ln -sf ${SRS_PLATFORM}/ffmpeg)
fi
if [ $SRS_FFMPEG_TOOL = YES ]; then
    if [[ -f ${SRS_OBJS}/${SRS_PLATFORM}/ffmpeg/bin/ffmpeg ]]; then
        echo "ffmpeg-4.1 is ok.";
    else
        echo -e "${RED}Error: No FFmpeg found at /usr/local/bin/ffmpeg${BLACK}"
        echo -e "${RED}    Please copy it from srs-docker${BLACK}"
        echo -e "${RED}    or download from http://ffmpeg.org/download.html${BLACK}"
        echo -e "${RED}    or disable it by --without-ffmpeg${BLACK}"
        exit -1;
    fi
    # Always update the links.
    if [[ -f ${SRS_OBJS}/${SRS_PLATFORM}/ffmpeg ]]; then
        (cd ${SRS_OBJS} && rm -rf ffmpeg && ln -sf ${SRS_PLATFORM}/ffmpeg)
    fi
fi

#####################################################################################
# build research code, librtmp
#####################################################################################
if [ $SRS_EXPORT_LIBRTMP_PROJECT = NO ]; then
    if [ $SRS_RESEARCH = YES ]; then
        mkdir -p ${SRS_OBJS}/research

        (cd ${SRS_WORKDIR}/research/hls && make ${SRS_JOBS} && mv ts_info ../../${SRS_OBJS_DIR}/research)
        ret=$?; if [[ $ret -ne 0 ]]; then echo "Build research/hls failed, ret=$ret"; exit $ret; fi

        (cd research/ffempty && make ${SRS_JOBS} && mv ffempty ../../${SRS_OBJS_DIR}/research)
        ret=$?; if [[ $ret -ne 0 ]]; then echo "Build research/ffempty failed, ret=$ret"; exit $ret; fi
    fi
fi

if [[ $SRS_LIBRTMP == YES ]]; then
    mkdir -p ${SRS_OBJS}/research
    
    # librtmp
    (cd ${SRS_WORKDIR}/research/librtmp && mkdir -p objs &&
        rm -rf ../../${SRS_OBJS_DIR}/research/librtmp &&
        ln -sf `pwd`/objs ../../${SRS_OBJS_DIR}/research/librtmp)
    ret=$?; if [[ $ret -ne 0 ]]; then echo "Link research/librtmp failed, ret=$ret"; exit $ret; fi
fi

#####################################################################################
# build utest code
#####################################################################################
if [ $SRS_UTEST = YES ]; then
    if [[ -f ${SRS_OBJS}/${SRS_PLATFORM}/gtest/include/gtest/gtest.h ]]; then
        echo "The gtest-1.6.0 is ok.";
    else
        echo "Build gtest-1.6.0";
        (
            rm -rf ${SRS_OBJS}/${SRS_PLATFORM}/gtest-1.6.0 && cd ${SRS_OBJS}/${SRS_PLATFORM} &&
            unzip -q ../../3rdparty/gtest-1.6.0.zip &&
            rm -rf gtest && ln -sf gtest-1.6.0 gtest
        )
    fi
    # check status
    ret=$?; if [[ $ret -ne 0 ]]; then echo "Build gtest-1.6.0 failed, ret=$ret"; exit $ret; fi
    # Always update the links.
    (cd ${SRS_OBJS} && rm -rf gtest && ln -sf ${SRS_PLATFORM}/gtest-1.6.0 gtest)
    if [ ! -f ${SRS_OBJS}/gtest/include/gtest/gtest.h ]; then echo "Build gtest-1.6.0 failed."; exit -1; fi
fi

#####################################################################################
# build gperf code
#####################################################################################
if [ $SRS_GPERF = YES ]; then
    if [[ -f ${SRS_OBJS}/${SRS_PLATFORM}/gperf/bin/pprof ]]; then
        echo "The gperftools-2.1 is ok.";
    else
        echo "Build gperftools-2.1";
        (
            rm -rf ${SRS_OBJS}/${SRS_PLATFORM}/gperftools-2.1 && cd ${SRS_OBJS}/${SRS_PLATFORM} &&
            unzip -q ../../3rdparty/gperftools-2.1.zip && cd gperftools-2.1 &&
            ./configure --prefix=`pwd`/_release --enable-frame-pointers && make ${SRS_JOBS} && make install &&
            cd .. && rm -rf gperf && ln -sf gperftools-2.1/_release gperf &&
            rm -rf pprof && ln -sf gperf/bin/pprof pprof
        )
    fi
    # check status
    ret=$?; if [[ $ret -ne 0 ]]; then echo "Build gperftools-2.1 failed, ret=$ret"; exit $ret; fi
    # Always update the links.
    (cd ${SRS_OBJS} && rm -rf pprof && ln -sf ${SRS_PLATFORM}/gperf/bin/pprof pprof)
    if [ ! -f ${SRS_OBJS}/gperf/bin/pprof ]; then echo "Build gperftools-2.1 failed."; exit -1; fi
fi