iOS 开发-编译第三方库 openssl及curl

1、前提

• iOS编译库需要三个架构,arm64,arm64e,x86_64，其中x86_64为模拟器所需

• iOS编译库需要下载xcode及对应的command line tool（执行命令时可以自动下载），下载失败需要去官网搜索下载

2、openssl

• 参考iOS如何编译OpenSSL静态库（openssl版本:1.1.1b）
• 执行配置命令（路径修改为要生成的目标架构文件夹路径）

  ./Configure iphoneos-cross --prefix=/Users/xxx/openssl-1.1.1b/openssl_armv7

• 修改makefile以下项目：

  1. 真机（arm64为例，arm64e修改其中arm64为arm64e一致） # sdk上层路径

     CROSS_TOP=/Users/relly/Downloads/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer

     sdk文件

     CROSS_SDK=iPhoneOS12.1.sdk

     CROSS_COMPILE=

     CC=/Users/relly/Downloads/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -arch arm64

     CXX=

     CPPFLAGS=

     CFLAGS=-DDSO_DLFCN -DHAVE_DLFCN_H -DNDEBUG -DOPENSSL_THREADS -DOPENSSL_NO_STATIC_ENGINE -DOPENSSL_PIC -DOPENSSLDIR="\"(OPENSSLDIR)\\"" -DENGINESDIR="\\"(ENGINESDIR)\"" -O3 -D_REENTRANT -isysroot (CROSS_TOP)/SDKs/(CROSS_SDK) -fno-common

  2. 模拟器 # sdk上层路径

     CROSS_TOP=/Users/relly/Downloads/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer

     sdk文件

     CROSS_SDK=iPhoneSimulator12.1.sdk

     CROSS_COMPILE=

     CC=/Users/relly/Downloads/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -arch x86_64

     CXX=

     CPPFLAGS=

     CFLAGS=-DDSO_DLFCN -DHAVE_DLFCN_H -DNDEBUG -DOPENSSL_THREADS -DOPENSSL_NO_STATIC_ENGINE -DOPENSSL_PIC -DOPENSSLDIR="\"(OPENSSLDIR)\\"" -DENGINESDIR="\\"(ENGINESDIR)\"" -O3 -D_REENTRANT -isysroot (CROSS_TOP)/SDKs/(CROSS_SDK) -fno-common

• 执行合并库命令

  1. lipo -create ../openssl_arm64/lib/libcrypto.a ../openssl_arm64e/lib/libcrypto.a ../openssl_x86_64/lib/libcrypto.a -output ./libcrypto.a

  2. lipo -create ../openssl_arm64/lib/libssl.a ../openssl_arm64e/lib/libssl.a ../openssl_x86_64/lib/libssl.a -output ./libssl.a

3、curl

• 修改此脚本中的路径为openssl所编译路径后，赋予执行权限执行即可:

  #!/bin/sh

  make distclean

  CONFIGURE_FLAGS="--disable-shared --disable-frontend"

  ARCHS="arm64 arm64e x86_64"

  directories

  SOURCE是下载的第三方库源码包，解压后的目录，可以把sh脚本放到这个目录，source改为""

  SOURCE=""

  FAT是所有指令集build后，输出的目录，所有静态库被合并成一个静态库

  FAT="fat-libtool"

  SCRATCH是下载源码包，解压后的目录

  SCRATCH="./"

  must be an absolute path

  THIN 各自指令集build后输出的静态库所在的目录，每个指令集为一个静态库

  THIN=pwd/"thin-libtool"

  COMPILE="y"
  LIPO="y"

  if [ "*" ] then if [ "*" = "lipo" ]
  then

  skip compile

  COMPILE=
  else
  ARCHS="$*"
  if [ $# -eq 1 ]
  then

  skip lipo

  LIPO=
  fi
  fi
  fi

  if [ "COMPILE" ] then CWD=`pwd` echo "CWD/$SOURCE........."
  for ARCH in $ARCHS
  do
  echo "building ARCH..." mkdir -p "SCRATCH/ARCH" cd "SCRATCH/$ARCH"

  if [ "ARCH" = "i386" -o "ARCH" = "x86_64" ]
  then
  PLATFORM="iPhoneSimulator"
  if [ "$ARCH" = "x86_64" ]
  then
  SIMULATOR="-mios-simulator-version-min=7.0"
  HOST=x86_64-apple-darwin
  else
  SIMULATOR="-mios-simulator-version-min=5.0"
  HOST=i386-apple-darwin
  fi
  else
  PLATFORM="iPhoneOS"
  SIMULATOR=
  HOST=arm-apple-darwin
  fi

  XCRUN_SDK=echo $PLATFORM | tr '[:upper:]' '[:lower:]'
  CC="xcrun -sdk $XCRUN_SDK clang -arch ARCH" #AS="CWD/$SOURCE/extras/gas-preprocessor.pl $CC"
  CFLAGS="-stdlib=libc++ -static -arch $ARCH SIMULATOR" CXXFLAGS="CFLAGS"
  LDFLAGS="$CFLAGS"

  if [ "$ARCH" = "arm64" ]
  then
  echo 11
  SSL_PATH="--with-openssl=/Users/relly/Lib/IOS/openssl-1.1.1t-modified/build/openssl_arm64"
  fi

  if [ "$ARCH" = "arm64e" ]
  then
  echo 22
  SSL_PATH="--with-openssl=/Users/relly/Lib/IOS/openssl-1.1.1t-modified/build/openssl_arm64e"
  fi

  if [ "$ARCH" = "x86_64" ]
  then
  echo 33
  SSL_PATH="--with-openssl=/Users/relly/Lib/IOS/openssl-1.1.1t-modified/build/openssl_x86_64"
  fi

  echo $SSL_PATH
  echo " $ARCH ------------------------- $SSL_PATH"

  CC=$CC CWD/SOURCE/configure $SSL_PATH --disable-ldap
  CONFIGURE_FLAGS \ --host=HOST
  --prefix="THIN/ARCH"
  CC="CC" CFLAGS="CFLAGS" LDFLAGS="$LDFLAGS"

  make -j3 install
  cd $CWD
  done
  fi

  if [ "$LIPO" ]
  then
  echo "building fat binaries..."
  mkdir -p $FAT/lib
  set - $ARCHS
  CWD=pwd
  cd $THIN/$1/lib
  for LIB in *.a
  do
  cd $CWD
  lipo -create find $THIN -name $LIB -output FAT/lib/LIB
  done

  cd $CWD
  cp -rf $THIN/$1/include $FAT
  fi

• 若出现compiler cannot create executables，执行命令指定xcode路径
  sudo xcode-select --switch /Users/relly/Downloads/Xcode.app/Contents/Developer/