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hg clone http://hg.openjdk.java.net/jdk8/jdk8 jdk8
cd jkd8
bash ./get_source.sh

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sudo ln -s /usr/X11/include/X11 /usr/include/X11
or
sudo ln -s /usr/local/X11/include/X11 /usr/include/X11 

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ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"

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sudo ln -s /usr/bin/llvm-g++ /Applications/Xcode.app/Contents/Developer/usr/bin/llvm-g++
sudo ln -s /usr/bin/llvm-gcc /Applications/Xcode.app/Contents/Developer/usr/bin/llvm-gcc 

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ydcun-prodeMBP:jdk8 ydcun-pro$ ./configure --with-freetype-include=/usr/local/include/freetype2 --with-freetype-lib=/usr/local/lib/
Configure source code has been updated, checking time stamps
Running generated-configure.sh
configure: Configuration created at Tue May 30 08:08:13 CST 2017.
configure: configure script generated at timestamp 1389186094.
checking for basename... /usr/bin/basename
checking for bash... /bin/bash
checking for cat... /bin/cat
checking for chmod... /bin/chmod
checking for cmp... /usr/bin/cmp
checking for comm... /usr/bin/comm
省略……
====================================================
A new configuration has been successfully created in
/Users/ydcun-pro/workspace/openjdk/jdk8/build/macosx-x86_64-normal-server-release
using configure arguments '--with-freetype-include=/usr/local/include/freetype2 --with-freetype-lib=/usr/local/lib/'.
Configuration summary:
* Debug level:
release
* JDK variant:
normal
* JVM variants:
server
* OpenJDK target: OS: macosx, CPU architecture: x86, address length: 64
Tools summary:
* Boot JDK:
java version "1.8.0_121" Java(TM) SE Runtime Environment (build 1.8.0_121-b13) Java HotSpot(TM) 64-Bit Server VM (build 25.121-b13, mixed mode)
(at /Library/Java/JavaVirtualMachines/jdk1.8.0_121.jdk/Contents/Home)
* C Compiler:
version
(at /usr/bin/gcc)
* C++ Compiler:
version
(at /usr/bin/g++)
Build performance summary:
* Cores to use:
2
* Memory limit:
16384 MB
* ccache status:
not installed (consider installing)

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# 设定语言选项，必须设置
export LANG=C
# Mac平台，C编译器不再是GCC，是clang
export CC=clang
# 跳过clang的一些严格的语法检查，不然会将N多的警告作为Error
export COMPILER_WARNINGS_FATAL=false
# 链接时使用的参数
export LFLAGS='-Xlinker -lstdc++'
# 是否使用clang
export USE_CLANG=true
# 使用64位数据模型
export LP64=1
# 告诉编译平台是64位，不然会按32位来编译
export ARCH_DATA_MODEL=64
# 允许自动下载依赖
export ALLOW_DOWNLOADS=true
# 并行编译的线程数，编译时间长，为了不影响其他工作，我选择为2
export HOTSPOT_BUILD_JOBS=2
export ALT_PARALLEL_COMPILE_JOBS=2
# 是否跳过与先前版本的比较
export SKIP_COMPARE_IMAGES=true
# 是否使用预编译头文件，加快编译速度
export USE_PRECOMPILED_HEADER=true
# 是否使用增量编译
export INCREMENTAL_BUILD=true
# 编译内容
export BUILD_LANGTOOLS=true
export BUILD_JAXP=true
export BUILD_JAXWS=true
export BUILD_CORBA=true
export BUILD_HOTSPOT=true
export BUILD_JDK=true
# 编译版本
export SKIP_DEBUG_BUILD=true
export SKIP_FASTDEBUG_BUILD=false
export DEBUG_NAME=debug
# 避开javaws和浏览器Java插件之类的部分的build
export BUILD_DEPLOY=false
export BUILD_INSTALL=false

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问题1：configure: error: GCC compiler is required
解决方法：
jdk8/common/autoconf/generated-configure.sh文件中
注释两处代码：第20061，21640行
#as_fn_error $? "GCC compiler is required. Try setting --with-tools-dir." "$LINENO" 5

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![问题1_1](https://raw.githubusercontent.com/ydcun/Java/master/java/src/main/java/com/ydcun/openjdk/jdk8/image/1_1.png)
![问题1_2](https://raw.githubusercontent.com/ydcun/Java/master/java/src/main/java/com/ydcun/openjdk/jdk8/image/1_2.png)

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问题2: Users/ydcun-pro/workspace/openjdk/jdk8/hotspot/src/share/vm/code/relocInfo.hpp:367:27: error: friend declaration specifying a default argument must be a definition
inline friend relocInfo prefix_relocInfo(int datalen = 0);
^
/Users/ydcun-pro/workspace/openjdk/jdk8/hotspot/src/share/vm/code/relocInfo.hpp:462:18: error: friend declaration specifying a default argument must be the only declaration
inline relocInfo prefix_relocInfo(int datalen) {
^
/Users/ydcun-pro/workspace/openjdk/jdk8/hotspot/src/share/vm/code/relocInfo.hpp:367:27: note: previous declaration is here
inline friend relocInfo prefix_relocInfo(int datalen = 0);
^
/Users/ydcun-pro/workspace/openjdk/jdk8/hotspot/src/share/vm/code/relocInfo.hpp:464:59: error: 'RAW_BITS' is a protected member of 'relocInfo'
return relocInfo(relocInfo::data_prefix_tag, relocInfo::RAW_BITS, relocInfo::datalen_tag | datalen);
^
/Users/ydcun-pro/workspace/openjdk/jdk8/hotspot/src/share/vm/code/relocInfo.hpp:272:23: note: declared protected here
enum RawBitsToken { RAW_BITS };
^
/Users/ydcun-pro/workspace/openjdk/jdk8/hotspot/src/share/vm/code/relocInfo.hpp:464:10: error: calling a protected constructor of class 'relocInfo'
return relocInfo(relocInfo::data_prefix_tag, relocInfo::RAW_BITS, relocInfo::datalen_tag | datalen);
^
/Users/ydcun-pro/workspace/openjdk/jdk8/hotspot/src/share/vm/code/relocInfo.hpp:273:3: note: declared protected here
relocInfo(relocType type, RawBitsToken ignore, int bits)
^
2 warnings and 4 errors generated.
make[8]: *** [precompiled.hpp.pch] Error 1
make[7]: *** [the_vm] Error 2
make[6]: *** [product] Error 2
make[5]: *** [generic_build2] Error 2
make[4]: *** [product] Error 2
make[3]: *** [all_product_universal] Error 2
make[2]: *** [universal_product] Error 2
make[1]: *** [/Users/ydcun-pro/workspace/openjdk/jdk8/build/macosx-x86_64-normal-server-release/hotspot/_hotspot.timestamp] Error 2
make: *** [hotspot-only] Error 2
解决方法：vim hotspot/src/share/vm/code/relocInfo.hpp
367行：
原：inline friend relocInfo prefix_relocInfo(int datalen = 0);
修改后：inline friend relocInfo prefix_relocInfo(int datalen);
462行：
原：inline relocInfo prefix_relocInfo(int datalen) {
修改后：inline relocInfo prefix_relocInfo(int datalen = 0) {

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问题3:
Running nasgen
Exception in thread "main" java.lang.VerifyError: class jdk.nashorn.internal.objects.ScriptFunctionImpl overrides final method setPrototype.(Ljava/lang/Object;)V
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:763)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:467)
at java.net.URLClassLoader.access$100(URLClassLoader.java:73)
at java.net.URLClassLoader$1.run(URLClassLoader.java:368)
at java.net.URLClassLoader$1.run(URLClassLoader.java:362)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:361)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at jdk.nashorn.internal.tools.nasgen.StringConstants.<clinit>(StringConstants.java:85)
at jdk.nashorn.internal.tools.nasgen.ScriptClassInstrumentor$2.visitMethodInsn(ScriptClassInstrumentor.java:157)
at jdk.internal.org.objectweb.asm.MethodVisitor.visitMethodInsn(MethodVisitor.java:509)
at jdk.internal.org.objectweb.asm.ClassReader.readCode(ClassReader.java:1445)
at jdk.internal.org.objectweb.asm.ClassReader.readMethod(ClassReader.java:1046)
at jdk.internal.org.objectweb.asm.ClassReader.accept(ClassReader.java:722)
at jdk.internal.org.objectweb.asm.ClassReader.accept(ClassReader.java:535)
at jdk.nashorn.internal.tools.nasgen.Main.process(Main.java:121)
at jdk.nashorn.internal.tools.nasgen.Main.processAll(Main.java:88)
at jdk.nashorn.internal.tools.nasgen.Main.main(Main.java:62)
make[1]: *** [/Users/ydcun-pro/workspace/openjdk/jdk8/build/macosx-x86_64-normal-server-release/nashorn/classes/_the.nasgen.run] Error 1
make: *** [nashorn-only] Error 2
修改：vim nashorn/make/BuildNashorn.gmk
80行原来 -cp 修改为：-Xbootclasspath/p
如图：