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int family = iterator->ai_family;
t_socket sock;
const char *err = inet_trycreate(&sock, family, SOCK_STREAM);
if (err) {
    continue; // check next
} else {
    t_timeout tm;
    struct addrinfo connecthints;
    memset(&connecthints, 0, sizeof(connecthints));
    connecthints.ai_socktype = SOCK_STREAM;
    /* make sure we try to connect only to the same family */
    connecthints.ai_family = family;
    
    if (family == PF_INET6) {
        int yes = 1;
        setsockopt(sock, IPPROTO_IPV6, IPV6_V6ONLY, (void *)&yes, sizeof(yes));
    }
    timeout_markstart(&tm);
    err = inet_tryconnect(&sock, &family, (const char *)hbuf, "3006", &tm, &connecthints);
    if (err) {
        socket_destroy(&sock);
        continue; // check next
    } else {
        // find success one
        CCLOG("== xx:%s", hbuf);
    }
}

编译png

$cmake .. -DPNG_STATIC=ON -DZLIB_INCLUDE_DIR=/home/u0u0/works/Cocos2d-thirdpart/tarballs/zlib-1.2.8/ -DZLIB_LIBRARY=/home/u0u0/works/Cocos2d-thirdpart/tarballs/zlib-1.2.8/

编译websockets

$cmake .. -DOPENSSL_ROOT_DIR=/home/u0u0/works/Cocos2d-thirdpart/tarballs/openssl-1.1.0c -DZLIB_INCLUDE_DIR=/home/u0u0/works/Cocos2d-thirdpart/tarballs/zlib-1.2.8/ -DZLIB_LIBRARY=/home/u0u0/works/Cocos2d-thirdpart/tarballs/zlib-1.2.8/ -DLWS_WITH_LIBUV=OFF -DLWS_WITH_SSL=ON -DLWS_WITH_SHARED=OFF -DLWS_WITHOUT_TEST_SERVER=ON -DLWS_WITHOUT_TEST_SERVER_EXTPOLL=ON -DLWS_WITHOUT_TEST_PING=ON -DLWS_WITHOUT_TEST_ECHO=ON -DLWS_WITHOUT_TEST_CLIENT=ON -DLWS_WITHOUT_TEST_FRAGGLE=ON -DLWS_IPV6=ON

编译OpenSSL

在 Linux 下自定义OpenSSL库，需要安装到一个路径，以便curl能找到。

./config --prefix=/home/u0u0/works/projects/Cocos2d-thirdpart/tarballs/openssl_install --openssldir=/home/u0u0/works/projects/Cocos2d-thirdpart/tarballs/openssl_install
make
make install

编译curl

./configure --enable-static --disable-ldap --enable-ipv6 --with-zlib=/home/u0u0/works/Cocos2d-thirdpart/tarballs/zlib-1.2.8/ --with-ssl=/home/u0u0/works/projects/Cocos2d-thirdpart/tarballs/openssl_install --prefix=/home/u0u0/works/projects/Cocos2d-thirdpart/tarballs/curl_install
make
make install

编译OpenAL

$sudo apt-get install libasound2-dev
$cmake .. -DLIBTYPE=STATIC -DALSOFT_INSTALL=OFF -DALSOFT_REQUIRE_ALSA=ON

sudo apt install flashplugin-installer

http://exmplayer.sourceforge.net/downloads.html

#Ubuntu 20.04 
sudo add-apt-repository ppa:exmplayer-dev/exmplayer-qt5
#old
sudo add-apt-repository ppa:exmplayer-dev/exmplayer
sudo apt-get update
sudo apt-get install exmplayer

1. 安装配置 mbpfan 风扇控制器: https://github.com/linux-on-mac/mbpfan
   mbpfan.service文件从github获取。

sudo apt-get install mbpfan
sudo cp mbpfan.service /etc/systemd/system/
sudo systemctl enable mbpfan.service
sudo systemctl daemon-reload
sudo systemctl start mbpfan.service

1. “软件和更新”中启用附加驱动，使用专有驱动。
2. 安装最新的tlp电源管理。

sudo apt install tlp
sudo systemctl enable tlp.service
sudo systemctl daemon-reload
sudo systemctl start mbpfan.service
sudo tlp start

libwebsockets-i86.a libwebsockets-x86_64.a
libwebsockets-arm32.a libwebsockets-arm64.a

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zlib

nmake -f win32/Makefile.msc 

openssl-1.1.0c

perl Configure VC-WIN32 no-asm
nmake

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macOS 10.14之后不支持交叉编译32位程序。退求其次，虚拟机装ubunut来解决问题。
ubunut 64系统，默认不带32相关头文件和库，需要

sudo apt-get install libc6-dev-i386
sudo apt-get install linux-libc-dev:i386

之后就能正确交叉编译了。

32位 luajit

D:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Auxiliary\Build\vcvars32.bat
msvcbuild.bat

64位 luajit

D:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Auxiliary\Build\vcvars64.bat
msvcbuild.bat gc64