推荐阅读：
- OpenJDK Home Page
- OpenJDK Build README（官方编译步骤，下载完源码也会有该文件“README-builds.html”）
- JDK BUG System（搜索编译中遇到的问题）
- OpenJDK Supported Build Platforms
本机环境：
- 系统版本：macOS Sierra (10.12.1)
- Boot JDK: java version "1.8.0_112" Java(TM) SE Runtime Environment (build 1.8.0_112-b16) Java HotSpot(TM) 64-Bit Server VM (build 25.112-b16, mixed mode) (at /Library/Java/JavaVirtualMachines/jdk1.8.0_112.jdk/Contents/Home)
- Toolchain: clang (clang/LLVM)
- C Compiler: Version 8.0.0 (at /usr/bin/clang)
- C++ Compiler: Version 8.0.0 (at /usr/bin/clang++)
编译前准备：
1.本机需要安装brew
参考：Homebrew — macOS 不可或缺的套件管理器
2.推荐使用iTerm2替换系统默认的“终端”
官网：iTerm2 - macOS Terminal Replacement
3.openjdk代码由hg管理，因此需要安装mercurial
$ brew install mercurial
若link失败，则：
$ sudo brew link mercurial
4、安装ccache提高编译速度
$ brew install ccache
5、安装freetype（编译时需要）
$ brew install freetype
开始编译：
1.获取源码
$ hg clone http://hg.openjdk.java.net/jdk9/jdk9 YourOpenJDK
$cd YourOpenJDK
$ bash ./get_source.sh
如果clone失败，建议按照如下方式修改get_source.sh，将
# Get clones of all absent nested repositories (harmless if already exist)
sh ./common/bin/hgforest.sh clone "$@" || exit $?
# Update all existing repositories to the latest sources
sh ./common/bin/hgforest.sh pull -u
修改为
# Get clones of all absent nested repositories (harmless if already exist)
sh ./common/bin/hgforest.sh clone "$@"
while [ $? -ne 0 ]
do
sh ./common/bin/hgforest.sh clone "$@"
done
# Update all existing repositories to the latest sources
sh ./common/bin/hgforest.sh pull -u
while [ $? -ne 0 ]
do
sh ./common/bin/hgforest.sh pull -u
done
该解决方法参考以下网页：http://www.jianshu.com/p/746963f28245
还有一种方法就是依次使用hg clone克隆以下链接到当前源码编译目录：
hg clone http://hg.openjdk.java.net/jdk9/jdk9/corba corba
hg clone http://hg.openjdk.java.net/jdk9/jdk9/hotspot hotspot
hg clone http://hg.openjdk.java.net/jdk9/jdk9/jaxp jaxp
hg clone http://hg.openjdk.java.net/jdk9/jdk9/jaxws jaxws
hg clone http://hg.openjdk.java.net/jdk9/jdk9/jdk jdk
hg clone http://hg.openjdk.java.net/jdk9/jdk9/langtools langtools
hg clone http://hg.openjdk.java.net/jdk9/jdk9/nashorn nashorn
获取所有源码完成以后开始继续配置编译
2.编译配置
./configure --with-target-bits=64 --with-freetype=/usr/local/Cellar/freetype/2.7 --enable-ccache --with-jvm-variants=server,client --with-boot-jdk-jvmargs="-Xlint:deprecation -Xlint:unchecked" --disable-zip-debug-info --disable-warnings-as-errors --with-debug-level=slowdebug 2>&1 | tee configure_mac_x64.log
……
====================================================
A new configuration has been successfully created in
/Volumes/Install/DocumentFls/Wor/Java/jdk9/build/macosx-x86_64-normal-serverANDclient-release
using configure arguments '--with-target-bits=64 --with-freetype=/usr/local/Cellar/freetype/2.7 --enable-ccache --with-jvm-variants=server,client --with-boot-jdk-jvmargs='-Xlint:deprecation -Xlint:unchecked' --disable-zip-debug-info --disable-warnings-as-errors --with-debug-level=release'.
Configuration summary:
* Debug level: slowdebug
* HS debug level: debug
* JDK variant: normal
* JVM variants: server client
* OpenJDK target: OS: macosx, CPU architecture: x86, address length: 64
* Version string: 9-internal+0-2016-11-14-103347.virson.jdk9 (9-internal)
Tools summary:
* Boot JDK: java version "1.8.0_112" Java(TM) SE Runtime Environment (build 1.8.0_112-b16) Java HotSpot(TM) 64-Bit Server VM (build 25.112-b16, mixed mode) (at /Library/Java/JavaVirtualMachines/jdk1.8.0_112.jdk/Contents/Home)
* Toolchain: clang (clang/LLVM)
* C Compiler: Version 8.0.0 (at /usr/bin/clang)
* C++ Compiler: Version 8.0.0 (at /usr/bin/clang++)
Build performance summary:
* Cores to use: 8
* Memory limit: 16384 MB
* ccache status: Active (3.3.3)
NOTE: You have requested to build more than one version of the JVM, which
will result in longer build times.
WARNING: Your build output directory is not on a local disk.
This will severely degrade build performance!
It is recommended that you create an output directory on a local disk,
and run the configure script again from that directory.
The following warnings were produced. Repeated here for convenience:
WARNING: Option --enable-zip-debug-info is deprecated and will be ignored.
WARNING: Please use --with-native-debug-symbols=zipped .
编译参数简介：
--with-target-bits：设置32位/64位编译
--with-freetype：设置freetype路径
--enable-ccache：设置启用ccache
--with-jvm-variants=client,server：为了保证兼容性，编译时JVM的Client和Server都会被编译
--with-boot-jdk-jvmargs：提供运行Bootstrap JDK所需要的JVM参数
--disable-zip-debug-info：禁用zip调试信息
--disable-warnings-as-errors：禁用将警告当做错误，避免因为警告而中断编译
--with-debug-level：设置调试等级
2>&1 | tee configure_mac_x64.log：将错误信息重定向至标准输出，并输出到configure_mac_x64.log
3.开始编译
export LANG=C
make all LOG=debug 2>&1 | tee make_mac_x64.log
编译完成后的结果如下：
Building target 'default (exploded-image)' in configuration 'macosx-x86_64-normal-serverANDclient-slowdebug'
Building JVM variant 'server' with features 'all-gcs cds compiler1 compiler2 dtrace fprof jni-check jvmci jvmti management nmt services vm-structs'
Building JVM variant 'client' with features 'all-gcs cds compiler1 dtrace fprof jni-check jvmci jvmti management nmt services vm-structs'
Creating support/modules_libs/java.desktop/libsplashscreen.dylib from 1 file(s)
Compiling 4 files for BUILD_JIGSAW_TOOLS
Stopping sjavac server
Finished building target 'default (exploded-image)' in configuration 'macosx-x86_64-normal-serverANDclient-slowdebug'
测试：
MacBook-Pro-2:jdk9 virson$ cd ./build/macosx-x86_64-normal-serverANDclient-slowdebug/
MacBook-Pro-2:macosx-x86_64-normal-serverANDclient-slowdebug virson$ ls
Makefile build.log.old compare.sh hotspot make-support
bootcycle-spec.gmk buildjdk-spec.gmk configure-support images spec.gmk
build.log buildtools configure.log jdk support
MacBook-Pro-2:macosx-x86_64-normal-serverANDclient-slowdebug virson$ cd jdk/bin
MacBook-Pro-2:bin virson$ ./java -version
openjdk version "9-internal"
OpenJDK Runtime Environment (slowdebug build 9-internal+0-2016-11-14-103347.virson.jdk9)
OpenJDK 64-Bit Server VM (slowdebug build 9-internal+0-2016-11-14-103347.virson.jdk9, mixed mode)
【编译完成】
编译过程中可能会遇到的问题：
下面是我在编译过程中遇到的一些问题和对应的解决方法，不一定正确，有些甚至是偏方，仅供参考，如果你有更优秀的解决方法，欢迎在下面留言评论！
问题一：
Traceback (most recent call last):
File "/usr/bin/xattr-2.7", line 7, in <module>
from pkg_resources import load_entry_point
ImportError: No module named pkg_resources
请使用以下命令修正：
sudo mv /usr/bin/xattr-2.7 /usr/bin/xattr-2.7.bak
sudo cp /usr/bin/xattr-2.6 /usr/bin/xattr-2.7
接着重新执行“开始编译”中的第2步:编译配置，即：
./configure --with-target-bits=64 --with-freetype=/usr/local/Cellar/freetype/2.7 --enable-ccache --with-jvm-variants=server,client --with-boot-jdk-jvmargs="-Xlint:deprecation -Xlint:unchecked" --disable-zip-debug-info --disable-warnings-as-errors --with-debug-level=slowdebug 2>&1 | tee configure_mac_x64.log
然后重新使用make all JOBS=4 LOG=debug 2>&1 | tee make_mac_x64.log编译即可
分析：这里会出现这个问题的原因是因为本机安装了多个版本的Python，如果本机没有安装额外其他版本的Python(例如我这里的2.7.12)，应该不会出现这个问题。
问题二：
错误日志如下：
=== Output from failing command(s) repeated here ===
/usr/bin/printf "* For target support_native_java.desktop_libosxapp_NSApplicationAWT.o:\n"
* For target support_native_java.desktop_libosxapp_NSApplicationAWT.o:
(/usr/bin/grep -v -e "^Note: including file:" < /Volumes/Install/DocumentFls/Wor/Java/jdk9/build/macosx-x86_64-normal-serverANDclient-slowdebug/make-support/failure-logs/support_native_java.desktop_libosxapp_NSApplicationAWT.o.log || true) | /usr/bin/head -n 12
../jdk/src/java.desktop/macosx/native/libosxapp/NSApplicationAWT.m:335:48: error: conflicting parameter types in implementation of 'nextEventMatchingMask:untilDate:inMode:dequeue:': 'NSEventMask' (aka 'enum NSEventMask') vs 'NSUInteger' (aka 'unsigned long') [-Werror,-Wmismatched-parameter-types]
- (NSEvent *)nextEventMatchingMask:(NSUInteger)mask untilDate:(NSDate *)expiration inMode:(NSString *)mode dequeue:(BOOL)deqFlag {
~~~~~~~~~~ ^
/System/Library/Frameworks/AppKit.framework/Headers/NSApplication.h:281:58: note: previous definition is here
- (nullable NSEvent *)nextEventMatchingMask:(NSEventMask)mask untilDate:(nullable NSDate *)expiration inMode:(NSRunLoopMode)mode dequeue:(BOOL)deqFlag;
~~~~~~~~~~~ ^
1 error generated.
if test `/usr/bin/wc -l < /Volumes/Install/DocumentFls/Wor/Java/jdk9/build/macosx-x86_64-normal-serverANDclient-slowdebug/make-support/failure-logs/support_native_java.desktop_libosxapp_NSApplicationAWT.o.log` -gt 12; then /bin/echo " ... (rest of output omitted)" ; fi
/usr/bin/printf "=== End of repeated output ===\n"
=== End of repeated output ===
if /usr/bin/grep -q "recipe for target .* failed" /Volumes/Install/DocumentFls/Wor/Java/jdk9/build/macosx-x86_64-normal-serverANDclient-slowdebug/build.log 2> /dev/null; then /usr/bin/printf "=== Make failure sequence repeated here ===\n" ; /usr/bin/grep "recipe for target .* failed" /Volumes/Install/DocumentFls/Wor/Java/jdk9/build/macosx-x86_64-normal-serverANDclient-slowdebug/build.log ; /usr/bin/printf "=== End of repeated output ===\n" ; /usr/bin/printf "Hint: Try searching the build log for the name of the first failed target.\n" ; else /usr/bin/printf "No indication of failed target found.\n" ; /usr/bin/printf "Hint: Try searching the build log for '] Error'.\n" ; fi
No indication of failed target found.
Hint: Try searching the build log for '] Error'.
/usr/bin/printf "Hint: If caused by a warning, try configure --disable-warnings-as-errors.\n\n"
Hint: If caused by a warning, try configure --disable-warnings-as-errors.
make[1]: *** [main] Error 2
make: *** [all] Error 2
解决办法：
按照提示，将NSApplicationAWT.m中的
- (NSEvent *)nextEventMatchingMask:(NSUInteger)mask untilDate:(NSDate *)expiration inMode:(NSString *)mode dequeue:(BOOL)deqFlag {
替换为
- (nullable NSEvent *)nextEventMatchingMask:(NSEventMask)mask untilDate:(nullable NSDate *)expiration inMode:(NSRunLoopMode)mode dequeue:(BOOL)deqFlag {
即可解决
问题三：
错误日志如下，有2个类型的问题，共涉及3个代码文件MacosxDebuggerLocal.m、jdhuff.c、jdphuff.c：
../hotspot/src/jdk.hotspot.agent/macosx/native/libsaproc/MacosxDebuggerLocal.m:691:21: error: 'ePtAttachDeprecated' is deprecated: PT_ATTACH is deprecated. See PT_ATTACHEXC [-Werror,-Wdeprecated-declarations]
if ((res = ptrace(PT_ATTACH, pid, 0, 0)) < 0) {
^
/usr/include/sys/ptrace.h:85:19: note: expanded from macro 'PT_ATTACH'
#define PT_ATTACH ePtAttachDeprecated /* trace some running process */
^
/usr/include/sys/ptrace.h:71:2: note: 'ePtAttachDeprecated' has been explicitly marked deprecated here
ePtAttachDeprecated __deprecated_enum_msg("PT_ATTACH is deprecated. See PT_ATTACHEXC") = 10
^
1 error generated.
make[3]: *** [/Volumes/Install/DocumentFls/Wor/Java/jdk9/build/macosx-x86_64-normal-serverANDclient-slowdebug/support/native/jdk.hotspot.agent/libsa/MacosxDebuggerLocal.o] Error 1
make[3]: *** Waiting for unfinished jobs....
make[2]: *** [jdk.hotspot.agent-libs] Error 2
=== Output from failing command(s) repeated here ===
* For target support_native_java.desktop_libjavajpeg_jdhuff.o:
../jdk/src/java.desktop/share/native/libjavajpeg/jdhuff.c:458:13: error: shifting a negative signed value is undefined [-Werror,-Wshift-negative-value]
{ 0, ((-1)<<1) + 1, ((-1)<<2) + 1, ((-1)<<3) + 1, ((-1)<<4) + 1,
~~~~^
../jdk/src/java.desktop/share/native/libjavajpeg/jdhuff.c:458:28: error: shifting a negative signed value is undefined [-Werror,-Wshift-negative-value]
{ 0, ((-1)<<1) + 1, ((-1)<<2) + 1, ((-1)<<3) + 1, ((-1)<<4) + 1,
~~~~^
../jdk/src/java.desktop/share/native/libjavajpeg/jdhuff.c:458:43: error: shifting a negative signed value is undefined [-Werror,-Wshift-negative-value]
{ 0, ((-1)<<1) + 1, ((-1)<<2) + 1, ((-1)<<3) + 1, ((-1)<<4) + 1,
~~~~^
../jdk/src/java.desktop/share/native/libjavajpeg/jdhuff.c:458:58: error: shifting a negative signed value is undefined [-Werror,-Wshift-negative-value]
{ 0, ((-1)<<1) + 1, ((-1)<<2) + 1, ((-1)<<3) + 1, ((-1)<<4) + 1,
~~~~^
... (rest of output omitted)
* For target support_native_java.desktop_libjavajpeg_jdphuff.o:
../jdk/src/java.desktop/share/native/libjavajpeg/jdphuff.c:218:13: error: shifting a negative signed value is undefined [-Werror,-Wshift-negative-value]
{ 0, ((-1)<<1) + 1, ((-1)<<2) + 1, ((-1)<<3) + 1, ((-1)<<4) + 1,
~~~~^
../jdk/src/java.desktop/share/native/libjavajpeg/jdphuff.c:218:28: error: shifting a negative signed value is undefined [-Werror,-Wshift-negative-value]
{ 0, ((-1)<<1) + 1, ((-1)<<2) + 1, ((-1)<<3) + 1, ((-1)<<4) + 1,
~~~~^
../jdk/src/java.desktop/share/native/libjavajpeg/jdphuff.c:218:43: error: shifting a negative signed value is undefined [-Werror,-Wshift-negative-value]
{ 0, ((-1)<<1) + 1, ((-1)<<2) + 1, ((-1)<<3) + 1, ((-1)<<4) + 1,
~~~~^
../jdk/src/java.desktop/share/native/libjavajpeg/jdphuff.c:218:58: error: shifting a negative signed value is undefined [-Werror,-Wshift-negative-value]
{ 0, ((-1)<<1) + 1, ((-1)<<2) + 1, ((-1)<<3) + 1, ((-1)<<4) + 1,
~~~~^
... (rest of output omitted)
* For target support_native_jdk.hotspot.agent_libsa_MacosxDebuggerLocal.o:
../hotspot/src/jdk.hotspot.agent/macosx/native/libsaproc/MacosxDebuggerLocal.m:691:21: error: 'ePtAttachDeprecated' is deprecated: PT_ATTACH is deprecated. See PT_ATTACHEXC [-Werror,-Wdeprecated-declarations]
if ((res = ptrace(PT_ATTACH, pid, 0, 0)) < 0) {
^
/usr/include/sys/ptrace.h:85:19: note: expanded from macro 'PT_ATTACH'
#define PT_ATTACH ePtAttachDeprecated /* trace some running process */
^
/usr/include/sys/ptrace.h:71:2: note: 'ePtAttachDeprecated' has been explicitly marked deprecated here
ePtAttachDeprecated __deprecated_enum_msg("PT_ATTACH is deprecated. See PT_ATTACHEXC") = 10
^
1 error generated.
=== End of repeated output ===
No indication of failed target found.
Hint: Try searching the build log for '] Error'.
Hint: If caused by a warning, try configure --disable-warnings-as-errors.
make[1]: *** [main] Error 2
make: *** [default] Error 2
解决办法：
从日志中可以看出问题出在
../hotspot/src/jdk.hotspot.agent/macosx/native/libsaproc/MacosxDebuggerLocal.m的691行，
../jdk/src/java.desktop/share/native/libjavajpeg/jdhuff.c的458行和
../jdk/src/java.desktop/share/native/libjavajpeg/jdphuff.c的218行
需要下载下面的2个patch文件，解压后放到对应路径下，我这里放在编译主目录/Volumes/Install/DocumentFls/Wor/Java/jdk9/下：
hotspot.patch.zip
jdk.patch.zip
放好后执行以下命令打上对应的patch，然后重新编译即可：
cd hotspot
patch -p1 <../hotspot.patch
cd ../jdk
patch -p1 <../jdk.patch
问题四：
错误日志如下：
../jdk/src/java.desktop/macosx/native/libsplashscreen/splashscreen_sys.m:397:5: error: 'objc_registerThreadWithCollector' is deprecated: it does nothing. Define OBJC_SILENCE_GC_DEPRECATIONS=1 to temporarily silence this diagnostic. [-Werror,-Wdeprecated-declarations]
objc_registerThreadWithCollector();
^
/usr/include/objc/objc-auto.h:245:25: note: 'objc_registerThreadWithCollector' has been explicitly marked deprecated here
static OBJC_INLINE void objc_registerThreadWithCollector() { }
^
1 error generated.
make[3]: *** [/Volumes/Install/DocumentFls/Wor/Java/jdk9/build/macosx-x86_64-normal-serverANDclient-slowdebug/support/native/java.desktop/libsplashscreen/splashscreen_sys.o] Error 1
make[3]: *** Waiting for unfinished jobs....
make[2]: *** [java.desktop-libs] Error 2
ERROR: Build failed for target 'default (exploded-image)' in configuration 'macosx-x86_64-normal-serverANDclient-slowdebug' (exit code 2)
=== Output from failing command(s) repeated here ===
* For target support_native_java.desktop_libsplashscreen_splashscreen_sys.o:
../jdk/src/java.desktop/macosx/native/libsplashscreen/splashscreen_sys.m:397:5: error: 'objc_registerThreadWithCollector' is deprecated: it does nothing. Define OBJC_SILENCE_GC_DEPRECATIONS=1 to temporarily silence this diagnostic. [-Werror,-Wdeprecated-declarations]
objc_registerThreadWithCollector();
^
/usr/include/objc/objc-auto.h:245:25: note: 'objc_registerThreadWithCollector' has been explicitly marked deprecated here
static OBJC_INLINE void objc_registerThreadWithCollector() { }
^
1 error generated.
=== End of repeated output ===
No indication of failed target found.
Hint: Try searching the build log for '] Error'.
Hint: If caused by a warning, try configure --disable-warnings-as-errors.
make[1]: *** [main] Error 2
make: *** [default] Error 2
解决方法：
注释掉splashscreen_sys.m文件的397行即可，即//objc_registerThreadWithCollector();
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