版权声明：欢迎转载，转载请说明出处https://csdn.yanxml.com。大数据Github项目地址https://github.com/SeanYanxml/bigdata。 https://blog.csdn.net/u010416101/article/details/84839103
前言
最近拜读《深入理解Java虚拟机》一书。书中第一章要求，自己编译Java虚拟机。我尝试的编译了一下，发现随着Mac和Code版本的不断更新，要做到编译书中提及的OpenJDK1.7已经非常的困难。至此，将编译过程纪录于此，以慰后继来者。
PS: 编译的整个流程花费了2天多的时间，准备周日晚上编译完就睡的，结果编译到第二天白天还没完成。编译期间失败大概有100多次，最后还是将问题一一解决了。不要放弃，有可能解决了这个问题，下一步就是成功!
另外，听说Mac当前版本编译OpenJDK1.9较为容易，大家未开始前可以转编译OpenJDK1.9过程会容易一下。
环境准备
- Mac 10.14
- XCode 10.1
- Command_Line_Tools_macOS_10.14_for_Xcode_10.1.dmg
- Cups 2.2.9
- Ant 1.7.1
- Bootstrap JDK 1.7.0_75/1.8.0_102
各文件下载地址:
OpenJDK源码
Mac阵营(XCode & Command_Line_Tools)
Cups
Cups Github
Ant
JDK
注: 1.Oracle JDK 1.6没有Mac版本的官方版，linux版本的我没装上。
2. OpenJDK没使用hg这样的管理工具，直接下载的现成的包。我下载的版本为openjdk-7u75-src-b13-18_dec_2014.zip。
环境变量设置
export LANG=C
#export ALT_BOOTDIR=/Library/Java/JavaVirtualMachines/jdk1.8.0_102.jdk/Contents/Home
#export ALT_BOOTDIR=/Library/Java/JavaVirtualMachines/1.7.0.jdk/Contents/Home
#1.7.0.jdk
export ALT_BOOTDIR=/Library/Java/JavaVirtualMachines/jdk1.7.0_75.jdk/Contents/Home
#export ALT_BOOTDIR=/Library/Java/JavaVirtualMachines/jdk1.7.0_75.jdk/Contents/Home
#jdk1.7.0_75.jdk
export ALLOW_DOWNLOADS=true
export HOTSPOT_BUILD_JOBS=4
export ALT_PARALLEL_COMPILE_JOBS=4
export SKIP_COMPARE_IMAGES=true
export USE_PRECOMPILED_HEADER=true
export BUILD_LANGTOOLS=true
#export BUILD_JAXP=false
#export BUILD_JAXWS=false
#export BUILD_CORBA=false
export BUILD_HOTSPOT=true
export BUILD_JDK=true
#export SKIP_DEBUG_BUILD=false
#export SKIP_FASTDEBUG_BUILD=true
#export DEBUG_NAME=debug
export BUILD_DEPLOY=false
export BUILD_INSTALL=false
export ALT_OUTPUTDIR=/Users/Sean/Software/OpenJDK/build
unset JAVA_HOME
unset CLASSPATH
make 2>&1 | tee $ALT_OUTPUTDIR/build.log
执行最后make命令操作前，可以
make sanity查看下环境变量是否有错误发生。
查看编译过程 用于定位问题：
make --debug=all 2>&1 | tee $ALT_OUTPUTDIR/build.log
选择llvm-c++安装第二种调试命令
make CC=clang COMPILER_WARNINGS_FATAL=false LFLAGS=’-Xlinker -lstdc++’ USE_CLANG=true LP64=1 LANG=C ALT_BOOTDIR=$JAVA_HOME ARCH_DATA_MODEL=64 HOTSPOT_BUILD_JOBS=8 all
问题纪录
- Q1. make: *** No targets specified and no makefile found. Stop.
因为
make命令执行的目录下没有Makefile文件，到根目录执行即可。
- Q2. org/apache/tools/ant/launch/Launcher : Unsupported major.minor version 52.0
(cd ./langtools/make && \
/Library/Developer/CommandLineTools/usr/bin/make JDK_TOPDIR=/Users/Sean/Software/OpenJDK/openjdk/jdk JDK_MAKE_SHARED_DIR=/Users/Sean/Software/OpenJDK/openjdk/jdk/make/common/shared EXTERNALSANITYCONTROL=true SOURCE_LANGUAGE_VERSION=7 TARGET_CLASS_VERSION=7 MILESTONE=internal BUILD_NUMBER=b00 JDK_BUILD_NUMBER=b00 FULL_VERSION=1.7.0-internal-sean_2018_12_03_04_40-b00 PREVIOUS_JDK_VERSION=1.6.0 JDK_VERSION=1.7.0 JDK_MKTG_VERSION=7 JDK_MAJOR_VERSION=1 JDK_MINOR_VERSION=7 JDK_MICRO_VERSION=0 PREVIOUS_MAJOR_VERSION=1 PREVIOUS_MINOR_VERSION=6 PREVIOUS_MICRO_VERSION=0 ARCH_DATA_MODEL=64 COOKED_BUILD_NUMBER=0 ALT_OUTPUTDIR=/Users/Sean/Software/OpenJDK/build/langtools ALT_BOOTDIR=/Library/Java/JavaVirtualMachines/jdk1.7.0_75.jdk/Contents/Home all)
JAVA_HOME=/Library/Java/JavaVirtualMachines/jdk1.7.0_75.jdk/Contents/Home ANT_OPTS=-Djava.io.tmpdir='/Users/Sean/Software/OpenJDK/build/langtools/build/ant-tmp' ant -Djdk.version=1.7.0 -Dfull.version='1.7.0-internal-sean_2018_12_03_04_40-b00' -Dmilestone=internal -Dbuild.number=b00 -Djavac.target=7 -Djavac.source=7 -Dboot.java.home=/Library/Java/JavaVirtualMachines/jdk1.7.0_75.jdk/Contents/Home -Dimport.jdk=/Users/Sean/Software/OpenJDK/openjdk/jdk -Dbuild.dir=/Users/Sean/Software/OpenJDK/build/langtools/build -Ddist.dir=/Users/Sean/Software/OpenJDK/build/langtools/dist build
Exception in thread "main" java.lang.UnsupportedClassVersionError: org/apache/tools/ant/launch/Launcher : Unsupported major.minor version 52.0
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:800)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:449)
at java.net.URLClassLoader.access$100(URLClassLoader.java:71)
at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:482)
make[2]: *** [build] Error 1
make[1]: *** [langtools-build] Error 2
make: *** [build_product_image] Error 2
因为使用低版本的JDK去解析高版本的Jar包文件导致，我的是因为Ant版本过高导致，转成
1.7.1即可。我知道你们都喜欢brew install ant，但是还是brew uinstall ant，然后手动安装吧。参考:
1. spring boot项目创建过程中遇到的问题（一）：Exception in thread “main” java.lang.UnsupportedClassVersionError
执行ant命令报错Unsupported major.minor version 52.0
使用Ant编译遇到的问题
- Q3. freetype错误/ALSA(声卡)错误
ERROR: FreeType version 2.3.0 or higher is required. /bin/mkdir -p /Users/Sean/Software/OpenJDK/build/btbins rm -f /Users/Sean/Software/OpenJDK/build/btbins/freetype_versioncheck Failed to build freetypecheck. ERROR: You do not have access to valid Cups header files. Please check your access to /usr/include/cups/cups.h and/or check your value of ALT_CUPS_HEADERS_PATH, CUPS is frequently pre-installed on many systems, or may be downloaded from http://www.cups.org Exiting because of the above error(s). make: *** [post-sanity] Error 1Mac 新版本安装
Quartz即可，下载地址:Quartz
第一章 Mac os下编译openJDK 7
自己编译JDK的时候遇到的问题记录
- Q4. build 问题
build-bootstrap-javac:
[javac] Compiling 134 source files to /Users/Sean/Software/OpenJDK/build/langtools/build/bootstrap/classes
[javac] /Users/Sean/Software/OpenJDK/openjdk/langtools/src/share/classes/com/sun/tools/javac/comp/Resolve.java:2182: 警告: [overrides] 类Resolve.InapplicableSymbolsError.Candidate覆盖了 equals, 但该类或任何超类都未覆盖 hashCode 方法
[javac] private class Candidate {
[javac] ^
[javac] 错误: 发现警告, 但指定了 -Werror
[javac] 1 个错误
[javac] 1 个警告
BUILD FAILED
/Users/Sean/Software/OpenJDK/openjdk/langtools/make/build.xml:452: The following error occurred while executing this line:
/Users/Sean/Software/OpenJDK/openjdk/langtools/make/build.xml:795: Compile failed; see the compiler error output for details.
Total time: 4 seconds
解决办法:不太记得怎么解决的。貌似jdk1.8换成jdk1.7，还是freetype没装导致。
- Q5. 乱码问题
/Users/Sean/Software/OpenJDK/build/corba/gensrc/com/sun/corba/se/spi/activation/Locator.java:6: 错误: 编码ascii的不可映射字符 * ���IDL-to-Java ��������� (���������), ������ "3.2"������ ^查看上下文可以发现:
BOOT_JAVAC_CMD = /Library/Java/JavaVirtualMachines/jdk1.8.0_102.jdk/Contents/Home/bin/javac -J-XX:ThreadStackSize=1536 -J-XX:-PrintVMOptions -J-XX:+UnlockDiagnosticVMOptions -J-XX:-LogVMOutput -J-Djava.awt.headless=true -J-Xmx512m -J-Xms512m -J-XX:PermSize=32m -J-XX:MaxPermSize=160m -encoding ascii -source 6 -target 6 -XDignore.symbol.file=true JAVAC_CMD = /Library/Java/JavaVirtualMachines/jdk1.7.0_75.jdk/Contents/Home/bin/java -XX:-PrintVMOptions -XX:+UnlockDiagnosticVMOptions -XX:-LogVMOutput -Djava.awt.headless=true -Xmx512m -Xms512m -XX:PermSize=32m -XX:MaxPermSize=160m -Xbootclasspath/p:/Users/Sean/Software/OpenJDK/build/langtools/dist/bootstrap/lib/javac.jar -jar /Users/Sean/Software/OpenJDK/build/langtools/dist/bootstrap/lib/javac.jar -source 7 -target 7 -encoding ascii -Xbootclasspath:/Users/Sean/Software/OpenJDK/build/classes里面的编码是
ascii，在文件下搜索ascii，然后都改成utf-8即可。
其次，还不放心，添加encoding编译
export JAVA_TOOL_OPTIONS=-Dfile.encoding=UTF-8
参考:
关于编译openjdk过程的一个编码错误
- Q6.
ALT_CUPS_HEADERS_PATH|cups错误
下载
cups，并且export ALT_CUPS_HEADERS_PATH=xxx
参考:
mac下编译openjdk1.7经验
- Q7. llvm-gcc & llvm-g++
make: *** [post-sanity] Error 1 sh-3.2# ./openjdk_install.sh /bin/sh: /Library/Developer/CommandLineTools/usr/bin/llvm-gcc: No >such file or directory /bin/sh: /Library/Developer/CommandLineTools/usr/bin/llvm-gcc: No >such file or directory /bin/sh: /Library/Developer/CommandLineTools/usr/bin/llvm-g++: No such file or directory
make[5]: *** [/Users/Sean/Software/OpenJDK/build/tmp/sun/javax.sound/jsound/obj64/PLATFORM_API_MacOSX_Utils.o] Error 127
make[5]: *** Waiting for unfinished jobs…
3 warnings generated.
18 warnings generated.
解决办法: sudo ln -s /usr/bin/llvm-g++ /Library/Developer/CommandLineTools/usr/bin/llvm-g++
sudo ln -s /usr/bin/llvm-gcc /Library/Developer/CommandLineTools/usr/bin/llvm-gcc
- Q8. warning 转义错误
/Users/Sean/Software/OpenJDK/openjdk/hotspot/src/share/vm/adlc/formssel.cpp:3352:8: warning: 'this' pointer cannot be null in well-defined C++ code; pointer may be assumed to always convert to true [-Wundefined-bool-conversion] if( !this ) return; ~^~~~ /Users/Sean/Software/OpenJDK/openjdk/hotspot/src/share/vm/adlc/output_c.cpp:3062:33: warning: '&&' within '||' [-Wlogical-op-parentheses] instr->_matrule != NULL && ~~~~~~~~~~~~~~~~~~~~~~~~^~ /Users/Sean/Software/OpenJDK/openjdk/hotspot/src/share/vm/adlc/output_c.cpp:3062:33: note: place parentheses around the '&&' expression to silence this warning instr->_matrule != NULL && ^ ( /Users/Sean/Software/OpenJDK/openjdk/hotspot/src/share/vm/adlc/output_c.cpp:3779:18: warning: using the result of an assignment as a condition without parentheses [-Wparentheses] while ( comp = comp_list.post_match_iter() ) { ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ /Users/Sean/Software/OpenJDK/openjdk/hotspot/src/share/vm/adlc/output_c.cpp:3779:18: note: place parentheses around the assignment to silence this warning while ( comp = comp_list.post_match_iter() ) { ^ ( ) /Users/Sean/Software/OpenJDK/openjdk/hotspot/src/share/vm/adlc/output_c.cpp:3779:18: note: use '==' to turn this assignment into an equality comparison while ( comp = comp_list.post_match_iter() ) { ^ == 1 warning generated. 2 warnings generated. 2 warnings generated. Making adlc llvm-g++ -Xlinker -lstdc++ -m64 -o ../generated/adfiles/adlc ../generated/adfiles/adlparse.o ../generated/adfiles/archDesc.o ../generated/adfiles/arena.o ../generated/adfiles/dfa.o ../generated/adfiles/dict2.o ../generated/adfiles/filebuff.o ../generated/adfiles/forms.o ../generated/adfiles/formsopt.o ../generated/adfiles/formssel.o ../generated/adfiles/main.o ../generated/adfiles/adlc-opcodes.o ../generated/adfiles/output_c.o ../generated/adfiles/output_h.o ld: library not found for -lstdc++ clang: error: linker command failed with exit code 1 (use -v to see invocation) make[8]: *** [../generated/adfiles/adlc] Error 1 make[7]: *** [ad_stuff] 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]: *** [hotspot-build] Error 2 make: *** [build_product_image] Error 2关掉warning警告，继续执行即可。
export COMPILER_WARNINGS_FATAL=false
参考:
第一章 Mac os下编译openJDK 7
- Q9. ld: library not found for -lstdc++
^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/ApplicationServices.framework/Frameworks/QD.framework/Headers/ColorSyncDeprecated.h:1965:41: note: 'CMDeviceProfileID' has been explicitly marked deprecated here
typedef UInt32 CMDeviceProfileID DEPRECATED_IN_MAC_OS_X_VERSION_10_6_AND_LATER;
^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/ApplicationServices.framework/Frameworks/QD.framework/Headers/ColorSyncDeprecated.h:2020:3: warning: 'CMProfileLocation' is deprecated: first deprecated in macOS 10.6 [-Wdeprecated-declarations]
CMProfileLocation profileLoc; /* The profile's location */
^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/ApplicationServices.framework/Frameworks/QD.framework/Headers/ColorSyncDeprecated.h:1602:3: note: 'CMProfileLocation' has been explicitly marked deprecated here
} CMProfileLocation DEPRECATED_IN_MAC_OS_X_VERSION_10_6_AND_LATER;
^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/ApplicationServices.framework/Frameworks/QD.framework/Headers/ColorSyncDeprecated.h:2022:3: warning: 'CMDeviceProfileScope' is deprecated: first deprecated in macOS 10.6 [-Wdeprecated-declarations]
CMDeviceProfileScope profileScope; /* The scope this profile applies to */
^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/ApplicationServices.framework/Frameworks/QD.framework/Headers/ColorSyncDeprecated.h:1986:18: note: 'CMDeviceProfileScope' has been explicitly marked deprecated here
} CMDeviceScope, CMDeviceProfileScope DEPRECATED_IN_MAC_OS_X_VERSION_10_6_AND_LATER;
^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/ApplicationServices.framework/Frameworks/QD.framework/Headers/ColorSyncDeprecated.h:2034:3: warning: 'CMDeviceProfileInfo' is deprecated: first deprecated in macOS 10.6 [-Wdeprecated-declarations]
CMDeviceProfileInfo profiles[1]; /* The profile info records */
^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/ApplicationServices.framework/Frameworks/QD.framework/Headers/ColorSyncDeprecated.h:2015:3: note: 'CMDeviceProfileInfo' has been explicitly marked deprecated here
} CMDeviceProfileInfo DEPRECATED_IN_MAC_OS_X_VERSION_10_6_AND_LATER;
^
/Users/Sean/Software/OpenJDK/openjdk/hotspot/agent/src/os/bsd/MacosxDebuggerLocal.m:27:9: fatal error: 'JavaNativeFoundation/JavaNativeFoundation.h' file not found
#import <JavaNativeFoundation/JavaNativeFoundation.h>
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
62 warnings and 1 error generated.
make[8]: *** [libsaproc.dylib] Error 1
make[8]: *** Waiting for unfinished jobs....
660 warnings generated.
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]: *** [hotspot-build] Error 2
make: *** [build_product_image] Error 2
修改:Software ▸ OpenJDK ▸ openjdk ▸ hotspot ▸ make ▸ bsd ▸ makefiles/saproc.make 文件内
>#/Library/Developer/CommandLineTools/SDKs/MacOSX10.14.sdk/System/Library/Frameworks #OTHER_CFLAGS = \ # -F/System/Library/Frameworks/JavaVM.framework/Frameworks \ # -F/System/Library/Frameworks/CoreGraphics.framework \ # -F/System/Library/Frameworks/ApplicationServices.framework/Frameworks OTHER_CFLAGS = \ -F/Library/Developer/CommandLineTools/SDKs/MacOSX10.14.sdk/System/Library/Frameworks/JavaVM.framework/Frameworks \ -F/Library/Developer/CommandLineTools/SDKs/MacOSX10.14.sdk/System/Library/Frameworks/CoreGraphics.framework/Frameworks \ -F/Library/Developer/CommandLineTools/SDKs/MacOSX10.14.sdk/System/Library/Frameworks/ApplicationServices.framework/Frameworks注意后面的地址写成自己的仓库地址即可。
- Q10. 类库问题2
make[5]: Nothing to be done for `sources'.
Building lib:/Users/Sean/Software/OpenJDK/build/lib/libjava.dylib
Begin parallel compiles: /Users/Sean/Software/OpenJDK/openjdk/jdk/make/java/java
/Library/Developer/CommandLineTools/usr/bin/llvm-gcc -Os -x objective-c -fno-strict-aliasing -fPIC -W -Wall -Wno-unused -Wno-parentheses -pipe -m64 -fno-omit-frame-pointer -D_LITTLE_ENDIAN -F/System/Library/Frameworks/JavaVM.framework/Frameworks -F/System/Library/Frameworks/ApplicationServices.framework/Frameworks -I/usr/X11R6/include -D_DARWIN_UNLIMITED_SELECT -DJDK_MAJOR_VERSION='"1"' -DJDK_MINOR_VERSION='"7"' -DJDK_MICRO_VERSION='"0"' -DJDK_BUILD_NUMBER='"b00"' -DNDEBUG -DARCH='"x86_64"' -Dx86_64 -D_ALLBSD_SOURCE -DRELEASE='"1.7.0-internal"' -D_LARGEFILE64_SOURCE -D_GNU_SOURCE -D_REENTRANT -DMACOSX -D_LP64=1 -I/usr/X11R6/include -D_DARWIN_UNLIMITED_SELECT -I. -I/Users/Sean/Software/OpenJDK/build/tmp/java/java.lang/java/CClassHeaders -I../../../src/macosx/javavm/export -I../../../src/share/javavm/export -I../../../src/share/native/java/lang/fdlibm/include -I../../../src/share/native/java/io -I../../../src/solaris/native/java/io -I../../../src/solaris/native/java/util -I../../../src/share/native/common -I../../../src/solaris/native/common -I../../../src/share/native/java/lang -I../../../src/solaris/native/java/lang -DRELEASE='"1.7.0-internal"' -DARCHPROPNAME='"x86_64"' -DALT_CODESET_KEY=_NL_CTYPE_CODESET_NAME -c -o /Users/Sean/Software/OpenJDK/build/tmp/java/java.lang/java/obj64/java_props_macosx.o ../../../src/solaris/native/java/lang/java_props_macosx.c
In file included from ../../../src/solaris/native/java/lang/java_props_macosx.c:34:
In file included from /Library/Developer/CommandLineTools/SDKs/MacOSX10.14.sdk/System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:48:
In file included from /Library/Developer/CommandLineTools/SDKs/MacOSX10.14.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSKeyedArchiver.h:9:
/Library/Developer/CommandLineTools/SDKs/MacOSX10.14.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSGeometry.h:12:9: fatal error: 'CoreGraphics/CGBase.h' file not found
#import <CoreGraphics/CGBase.h>
^~~~~~~~~~~~~~~~~~~~~~~
1 error generated.
make[5]: *** [/Users/Sean/Software/OpenJDK/build/tmp/java/java.lang/java/obj64/java_props_macosx.o] Error 1
make[4]: *** [library_parallel_compile] Error 2
make[3]: *** [all] Error 1
make[2]: *** [all] Error 1
make[1]: *** [jdk-build] Error 2
make: *** [build_product_image] Error 2
解决办法 同上 改地址即可。
- Q11. openjdk ‘JavaNativeFoundation/JavaNativeFoundation.h’ file not found
因为Xcode之前有 xxx-for-java-command-lines-tools安装包，然后所有的仓库地址都是System/Library/Frameworks/，现在全部改成/Library/Developer/CommandLineTools/SDKs/MacOSX10.14.sdk/了，所以参考上面这个改正一下即可。
解决办法 同上具体地址可以sudo su ; cd /; find . -name "*JavaNativeFoundation.h*"查找一下就能发现了。
参考:
JDK7 build on mac os fails: JavaNativeFoundation.h: No such file
- Q12. openjdk note: expanded from macro ‘NEW_C_HEAP_ARRAY2’
因为变量被删除了 改正即可。
MacosxDebuggerLocal.m 文件491行左右
Macintosh HD ▸ 用户 ▸ Sean ▸ Software ▸ OpenJDK ▸ openjdk ▸ hotspot ▸ agent ▸ src ▸ os ▸ bsd//if ((res = ptrace(PT_ATTACH, pid, 0, 0)) < 0) { if ((res = 10) < 0) {
- Q13. clang: error: unknown argument: ‘-fpch-deps’
Macintosh HD ▸ 用户 ▸ Sean ▸ Software ▸ OpenJDK ▸ tmp ▸ openjdk ▸ hotspot ▸ make ▸ bsd ▸ makefiles>gcc.make
hotspot/make/bsd/makefiles/gcc.make(line 334) diff --git a/src/share/vm/code/relocInfo.hpp b/src/share/vm/code/relocInfo.hpp --- a/src/share/vm/code/relocInfo.hpp +++ b/src/share/vm/code/relocInfo.hpp @@ -364,7 +364,7 @@ // "immediate" in the prefix header word itself. This optimization // is invisible outside this module.) - inline friend relocInfo prefix_relocInfo(int datalen = 0); + inline friend relocInfo prefix_relocInfo(int datalen); protected: // an immediate relocInfo optimizes a prefix with one 10-bit unsigned value @@ -459,7 +459,7 @@ return relocInfo(relocInfo::none, relocInfo::offset_limit() - relocInfo::offset_unit); } -inline relocInfo prefix_relocInfo(int datalen) { +inline relocInfo prefix_relocInfo(int datalen = 0) { assert(relocInfo::fits_into_immediate(datalen), "datalen in limits"); return relocInfo(relocInfo::data_prefix_tag, relocInfo::RAW_BITS, relocInfo::datalen_tag | datalen); }参考:
Mac OSX 10.9 上build openjdk8和openjdk7
8033057: clang: friend declaration specifying a default argument must be a definition
Reviewed-by:
- Q14. 编译库dylib错误
make[9]: `/Users/Sean/Software/OpenJDK/build/hotspot/outputdir/bsd_amd64_compiler2/product/../generated/sa-jdi.jar' is up to date.
echo "dtrace headers generated"
dtrace headers generated
make[8]: `precompiled.hpp.gch' is up to date.
echo "Doing vm.make build:"
Doing vm.make build:
All done.
cd bsd_amd64_compiler2/product && ./test_gamma
Picked up JAVA_TOOL_OPTIONS: -Dfile.encoding=UTF-8
Error occurred during initialization of VM
Unable to load native library: dlopen(/Library/Java/JavaVirtualMachines/jdk1.8.0_102.jdk/Contents/Home/jre/lib/libjava.dylib, 1): Symbol not found: _JVM_GetClassTypeAnnotations
Referenced from: /Library/Java/JavaVirtualMachines/jdk1.8.0_102.jdk/Contents/Home/jre/lib/libjava.dylib
Expected in: ./libjvm.dylib
in /Library/Java/JavaVirtualMachines/jdk1.8.0_102.jdk/Contents/Home/jre/lib/libjava.dylib
Using java runtime at: /Library/Java/JavaVirtualMachines/jdk1.8.0_102.jdk/Contents/Home/jre
make[6]: *** [product] Error 1
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]: *** [hotspot-build] Error 2
make: *** [build_product_image] Error 2
localhost:openjdk Sean$ export ALT_BOOTDIR=/Library/Java/JavaVirtualMachines/jdk1.7.0_75.jdk/Contents/Home
删除重新编译，可能和之前的错误有关导致的中间错误。
- Q15. 32位显卡问题
/Library/Developer/CommandLineTools/usr/bin/llvm-gcc -arch x86_64 -DNDEBUG -DARCH='"x86_64"' -Dx86_64 -D_ALLBSD_SOURCE -DRELEASE='"1.7.0-internal"' -D_LARGEFILE64_SOURCE -D_GNU_SOURCE -D_REENTRANT -DMACOSX -D_LP64=1 -I/usr/X11R6/include -D_DARWIN_UNLIMITED_SELECT -I. -I/Users/Sean/Software/OpenJDK/build/tmp/sun/sun.awt.X11/xawt/CClassHeaders -I../../../src/macosx/javavm/export -I../../../src/share/javavm/export -I../../../src/share/native/common -I../../../src/solaris/native/common -I../../../src/share/native/sun/awt/X11 -I../../../src/solaris/native/sun/awt/X11 -I/Users/Sean/Software/OpenJDK/openjdk/cups-2.2.9 -DXAWT -DXAWT_HACK -I/Users/Sean/Software/OpenJDK/build/tmp/sun/sun.awt.X11/xawt/../../sun.awt/awt/CClassHeaders -I../../../src/solaris/native/sun/awt -I../../../src/solaris/native/sun/xawt -I../../../src/solaris/native/sun/jdga -I../../../src/share/native/sun/awt/debug -I../../../src/share/native/sun/awt/image/cvutils -I../../../src/share/native/sun/java2d -I../../../src/share/native/sun/java2d/loops -I../../../src/share/native/sun/awt/image/cvutils -I../../../src/share/native/sun/awt/image -I../../../src/share/native/sun/font -I../../../src/solaris/native/sun/java2d -I../../../src/share/native/sun/java2d/pipe -I../../../src/share/native/sun/java2d/opengl -I../../../src/solaris/native/sun/java2d/opengl -I../../../src/solaris/native/sun/java2d/x11 -I../../../src/share/native/sun/dc/path -I../../../src/share/native/sun/dc/doe -I../../../src/share/native/sun/awt/alphacomposite -I../../../src/share/native/sun/awt/medialib -I../../../src/solaris/native/sun/awt/medialib -I../../../src/solaris/native/sun/font -I../../../src/share/native/sun/awt -I../../../src/solaris/native/sun/awt -DX11_PATH=\"/usr/X11R6\" -DPACKAGE_PATH=\"/opt/local\" -DINTERNAL_BUILD -o /Users/Sean/Software/OpenJDK/build/gensrc/sun/awt/X11/generator/sizer.32 /Users/Sean/Software/OpenJDK/build/gensrc/sun/awt/X11/generator/sizer.32.c /bin/mkdir -p /Users/Sean/Software/OpenJDK/build/gensrc/sun/awt/X11/generator rm -f /Users/Sean/Software/OpenJDK/build/gensrc/sun/awt/X11/generator/sizer.32 /Library/Developer/CommandLineTools/usr/bin/llvm-gcc -arch i386 -DNDEBUG -DARCH='"x86_64"' -Dx86_64 -D_ALLBSD_SOURCE -DRELEASE='"1.7.0-internal"' -D_LARGEFILE64_SOURCE -D_GNU_SOURCE -D_REENTRANT -DMACOSX -D_LP64=1 -I/usr/X11R6/include -D_DARWIN_UNLIMITED_SELECT -I. -I/Users/Sean/Software/OpenJDK/build/tmp/sun/sun.awt.X11/xawt/CClassHeaders -I../../../src/macosx/javavm/export -I../../../src/share/javavm/export -I../../../src/share/native/common -I../../../src/solaris/native/common -I../../../src/share/native/sun/awt/X11 -I../../../src/solaris/native/sun/awt/X11 -I/Users/Sean/Software/OpenJDK/openjdk/cups-2.2.9 -DXAWT -DXAWT_HACK -I/Users/Sean/Software/OpenJDK/build/tmp/sun/sun.awt.X11/xawt/../../sun.awt/awt/CClassHeaders -I../../../src/solaris/native/sun/awt -I../../../src/solaris/native/sun/xawt -I../../../src/solaris/native/sun/jdga -I../../../src/share/native/sun/awt/debug -I../../../src/share/native/sun/awt/image/cvutils -I../../../src/share/native/sun/java2d -I../../../src/share/native/sun/java2d/loops -I../../../src/share/native/sun/awt/image/cvutils -I../../../src/share/native/sun/awt/image -I../../../src/share/native/sun/font -I../../../src/solaris/native/sun/java2d -I../../../src/share/native/sun/java2d/pipe -I../../../src/share/native/sun/java2d/opengl -I../../../src/solaris/native/sun/java2d/opengl -I../../../src/solaris/native/sun/java2d/x11 -I../../../src/share/native/sun/dc/path -I../../../src/share/native/sun/dc/doe -I../../../src/share/native/sun/awt/alphacomposite -I../../../src/share/native/sun/awt/medialib -I../../../src/solaris/native/sun/awt/medialib -I../../../src/solaris/native/sun/font -I../../../src/share/native/sun/awt -I../../../src/solaris/native/sun/awt -DX11_PATH=\"/usr/X11R6\" -DPACKAGE_PATH=\"/opt/local\" -DINTERNAL_BUILD -o /Users/Sean/Software/OpenJDK/build/gensrc/sun/awt/X11/generator/sizer.32 /Users/Sean/Software/OpenJDK/build/gensrc/sun/awt/X11/generator/sizer.32.c ld: warning: The i386 architecture is deprecated for macOS (remove from the Xcode build setting: ARCHS) ld: warning: ignoring file /Library/Developer/CommandLineTools/SDKs/MacOSX10.14.sdk/usr/lib/libSystem.tbd, missing required architecture i386 in file /Library/Developer/CommandLineTools/SDKs/MacOSX10.14.sdk/usr/lib/libSystem.tbd Undefined symbols for architecture i386: "___stack_chk_fail", referenced from: _main in sizer-17ffb5.o "___stack_chk_guard", referenced from: _main in sizer-17ffb5.o "_printf", referenced from: _main in sizer-17ffb5.o ld: symbol(s) not found for architecture i386 clang: error: linker command failed with exit code 1 (use -v to see invocation) make[4]: *** >>[/Users/Sean/Software/OpenJDK/build/gensrc/sun/awt/X11/generator/sizer.32] Error 1 make[3]: *** [all] Error 1 make[2]: *** [all] Error 1 make[1]: *** [jdk-build] Error 2 make: *** [build_product_image] Error 2这个问题有点搞，因为32问题，类库里面少了32位的东西。看看
libSystem.tbd这个问题localhost:~ Sean$ cat /Library/Developer/CommandLineTools/SDKs/MacOSX10.14.sdk/usr/lib/libSystem.tbd --- !tapi-tbd-v3 archs: [ x86_64 ] uuids: [ 'x86_64: D5AFCC78-2AC2-37EB-B0EF-BB00FD38ED00' ] platform: macosx install-name: /usr/lib/libSystem.B.dylib current-version: 1252.200.5 objc-constraint: none exports: - archs: [ x86_64 ] re-exports: [ /usr/lib/system/libcache.dylib, >/usr/lib/system/libcommonCrypto.dylib, /usr/lib/system/libcompiler_rt.dylib, >/usr/lib/system/libcopyfile.dylib, /usr/lib/system/libcorecrypto.dylib, >/usr/lib/system/libdispatch.dylib, /usr/lib/system/libdyld.dylib, >/usr/lib/system/libkeymgr.dylib, /usr/lib/system/liblaunch.dylib, >/usr/lib/system/libmacho.dylib, /usr/lib/system/libquarantine.dylib, >/usr/lib/system/libremovefile.dylib, /usr/lib/system/libsystem_asl.dylib, >/usr/lib/system/libsystem_blocks.dylib, /usr/lib/system/libsystem_c.dylib, >/usr/lib/system/libsystem_configuration.dylib, /usr/lib/system/libsystem_coreservices.dylib, >/usr/lib/system/libsystem_darwin.dylib, /usr/lib/system/libsystem_dnssd.dylib, >/usr/lib/system/libsystem_info.dylib, /usr/lib/system/libsystem_kernel.dylib, >/usr/lib/system/libsystem_m.dylib, /usr/lib/system/libsystem_malloc.dylib, >/usr/lib/system/libsystem_networkextension.dylib, /usr/lib/system/libsystem_notify.dylib, >/usr/lib/system/libsystem_platform.dylib, /usr/lib/system/libsystem_pthread.dylib, >/usr/lib/system/libsystem_sandbox.dylib, /usr/lib/system/libsystem_secinit.dylib, >/usr/lib/system/libsystem_symptoms.dylib, /usr/lib/system/libsystem_trace.dylib, >/usr/lib/system/libunwind.dylib, /usr/lib/system/libxpc.dylib ] symbols: [ 'R8289209$_close', 'R8289209$_fork', 'R8289209$_fsync', 'R8289209$_getattrlist', 'R8289209$_getrlimit', 'R8289209$_getxattr', 'R8289209$_open', 'R8289209$_pthread_attr_destroy', 'R8289209$_pthread_attr_init', 'R8289209$_pthread_attr_setdetachstate', 'R8289209$_pthread_create', 'R8289209$_pthread_mutex_lock', 'R8289209$_pthread_mutex_unlock', 'R8289209$_pthread_self', 'R8289209$_ptrace', 'R8289209$_read', 'R8289209$_setattrlist', 'R8289209$_setrlimit', 'R8289209$_sigaction', 'R8289209$_stat', 'R8289209$_sysctl', 'R8289209$_time', 'R8289209$_unlink', 'R8289209$_write', ___crashreporter_info__, _libSystem_atfork_child, _libSystem_atfork_parent, _libSystem_atfork_prepare, _mach_init_routine ] ...确实没有
i386，查了下发现这个是32位系统的。(32后面基本不会用到这样改没什么问题)然后想了个土办法``
cp sizer.32.c size32; chmod 755 sizer.32.c
如果64位一样报错的话，相同的办法修改即可。
cp sizer.64.c size64; chmod 755 sizer.64.c
Macintosh HD ▸ 用户 ▸ Sean ▸ Software ▸ OpenJDK ▸ openjdk ▸ jdk ▸ make ▸ sun ▸ lwawt / awt /xxawt
注要是这几个awt的makefile文件里面会用到，看下即可。
- Q16. 十年问题
Done with parallel compiles: /Users/Sean/Software/OpenJDK/openjdk/jdk/make/java/java
rm -f /Users/Sean/Software/OpenJDK/build/lib/currency.data
/Library/Java/JavaVirtualMachines/jdk1.7.0_75.jdk/Contents/Home/bin/java -XX:-PrintVMOptions -XX:+UnlockDiagnosticVMOptions -XX:-LogVMOutput -Djava.awt.headless=true -Xmx512m -Xms512m -XX:PermSize=32m -XX:MaxPermSize=160m -jar /Users/Sean/Software/OpenJDK/build/btjars/generatecurrencydata.jar -o /Users/Sean/Software/OpenJDK/build/lib/currency.data.temp \
< ../../../src/share/classes/java/util/CurrencyData.properties
Picked up JAVA_TOOL_OPTIONS: -Dfile.encoding=UTF-8
Error: time is more than 10 years from present: 1136059200000
java.lang.RuntimeException: time is more than 10 years from present: 1136059200000
at build.tools.generatecurrencydata.GenerateCurrencyData.makeSpecialCaseEntry(GenerateCurrencyData.java:285)
at build.tools.generatecurrencydata.GenerateCurrencyData.buildMainAndSpecialCaseTables(GenerateCurrencyData.java:225)
at build.tools.generatecurrencydata.GenerateCurrencyData.main(GenerateCurrencyData.java:154)
make[4]: *** [/Users/Sean/Software/OpenJDK/build/lib/currency.data] Error 1
make[3]: *** [all] Error 1
make[2]: *** [all] Error 1
make[1]: *** [jdk-build] Error 2
make: *** [build_product_image] Error 2
解决办法
修改CurrencyData.properties（路径：jdk/src/share/classes/java/util/CurrencyData.properties）
修改108行
AZ=AZM;2009-12-31-20-00-00;AZN
修改381行
MZ=MZM;2009-06-30-22-00-00;MZN
修改443行
RO=ROL;2009-06-30-21-00-00;RON
修改535行
TR=TRL;2009-12-31-22-00-00;TRY
修改561行
VE=VEB;2009-01-01-04-00-00;VEF
参考:
第一章 Mac os下编译openJDK 7
- Q17. test_gamma报错
注释build/macosx-x86_64-debug/hotspot/outputdir/bsd_amd64_compiler2/jvmg/test_gamma中的测试代码,在最后一行 #./${GAMMA_PROG} -Xbatch -showversion Queens < /dev/null
- Q18.
libTIFF.dylib无法找到
cd bsd_amd64_compiler2/product && ./test_gamma
Picked up JAVA_TOOL_OPTIONS: -Dfile.encoding=UTF-8
Error occurred during initialization of VM
Unable to load native library: dlopen(/Library/Java/JavaVirtualMachines/jdk1.8.0_102.jdk/Contents/Home/jre/lib/libjava.dylib, 1): Symbol not found: __cg_jpeg_resync_to_restart
Referenced from: /System/Library/Frameworks/ImageIO.framework/Versions/A/Resources/libTIFF.dylib
Expected in: /Library/Java/JavaVirtualMachines/jdk1.8.0_102.jdk/Contents/Home/jre/lib/libJPEG.dylib
in /System/Library/Frameworks/ImageIO.framework/Versions/A/Resources/libTIFF.dylib
Using java runtime at: /Library/Java/JavaVirtualMachines/jdk1.8.0_102.jdk/Contents/Home/jre
make[6]: *** [product] Error 1
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]: *** [hotspot-build] Error 2
make: *** [build_product_image] Error 2
解决办法(因为类库地址换了):
cd /Library/Java/JavaVirtualMachines/jdk1.7.0_75.jdk/Contents/Home/jre/lib/
sudo mv libjpeg.dylib libjpeg.dylib.bak
sudo ln -s /System/Library/Frameworks/ImageIO.framework/Versions/A/Resources/libJPEG.dylib libJPEG.dylibsudo ln -s /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/System/Library/Frameworks//ImageIO.framework/Versions/A/Resources/libJPEG.dylib /Library/Java/JavaVirtualMachines/jdk1.7.0_75.jdk/Contents/Home/jre/lib/libJPEG.dylib
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/System/Library/Frameworks/
- Q19. RMIConnectionImpl_Stub.java文件无法找到
This program built for i386-apple-darwin11.3.0 Reading makefiles... Updating goal targets.... File `all' does not exist. File `build' does not exist. File `stubs' does not exist. File >`/Users/Sean/Software/OpenJDK/build/classes/javax/management/remote/rmi/RMIServerImpl_Stub.class' does not exist. Must remake target `/Users/Sean/Software/OpenJDK/build/classes/javax/management/remote/rmi/RMIServerImpl_Stub.class'. /bin/mkdir -p >/Users/Sean/Software/OpenJDK/build/classes/javax/management/remote/rmi rm -f /Users/Sean/Software/OpenJDK/build/classes/javax/management/remote/rmi/RMIServerImpl_Stub.class /Users/Sean/Software/OpenJDK/build/bin/java -XX:-PrintVMOptions -XX:+UnlockDiagnosticVMOptions -XX:-LogVMOutput -Djava.awt.headless=true -Xmx512m -Xms512m -XX:PermSize=32m -XX:MaxPermSize=160m -cp /Users/Sean/Software/OpenJDK/build/classes sun.rmi.rmic.Main -classpath "/Users/Sean/Software/OpenJDK/build/classes" \ -d /Users/Sean/Software/OpenJDK/build/classes \ -v1.2 \ -keepgenerated \ javax.management.remote.rmi.RMIServerImpl解决办法(自己解决):
因为有两个文件没有编译导致,导致在后续rm命令时候无法找到文件。cd /Users/Sean/Software/OpenJDK/build/classes/javax/management/remote/rmi/ javac RMIServerImpl_Stub.java javac RMIConnectionImpl_Stub.java这个是编译RMI模块出现的问题，如果自己随便搞会导致后面打成的包里面出现问题，所以需要用javac编译。有很多人说莫名奇妙就好了，是内存问题，这个简直就是搞笑的。
- Q20. 上述问题引申问题
Using boot class path = [/Users/Sean/Software/OpenJDK/build/tmp/rt-orig.jar, /Users/Sean/Software/OpenJDK/build/langtools/dist/bootstrap/lib/javac.jar, /Library/Java/JavaVirtualMachines/jdk1.7.0_75.jdk/Contents/Home/jre/lib/resources.jar, /Library/Java/JavaVirtualMachines/jdk1.7.0_75.jdk/Contents/Home/jre/lib/sunrsasign.jar, /Library/Java/JavaVirtualMachines/jdk1.7.0_75.jdk/Contents/Home/jre/lib/jsse.jar, /Library/Java/JavaVirtualMachines/jdk1.7.0_75.jdk/Contents/Home/jre/lib/jce.jar, /Library/Java/JavaVirtualMachines/jdk1.7.0_75.jdk/Contents/Home/jre/lib/charsets.jar, /Library/Java/JavaVirtualMachines/jdk1.7.0_75.jdk/Contents/Home/jre/lib/jfr.jar, /Library/Java/JavaVirtualMachines/jdk1.7.0_75.jdk/Contents/Home/jre/classes, /Library/Java/JavaVirtualMachines/jdk1.7.0_75.jdk/Contents/Home/jre/lib/ext/sunec.jar, /Library/Java/JavaVirtualMachines/jdk1.7.0_75.jdk/Contents/Home/jre/lib/ext/dnsns.jar, /Library/Java/JavaVirtualMachines/jdk1.7.0_75.jdk/Contents/Home/jre/lib/ext/localedata.jar, /Library/Java/JavaVirtualMachines/jdk1.7.0_75.jdk/Contents/Home/jre/lib/ext/sunjce_provider.jar, /Library/Java/JavaVirtualMachines/jdk1.7.0_75.jdk/Contents/Home/jre/lib/ext/sunpkcs11.jar, /Library/Java/JavaVirtualMachines/jdk1.7.0_75.jdk/Contents/Home/jre/lib/ext/zipfs.jar, /System/Library/Java/Extensions/MRJToolkit.jar]
警告: /Users/Sean/Software/OpenJDK/build/tmp/rt-orig.jar(javax/management/remote/rmi/RMIConnectionImpl_Stub.class): 主版本 52 比 51 新, 此编译器支持最新的主版本。
建议升级此编译器。
错误: 错误的类文件: /Users/Sean/Software/OpenJDK/build/tmp/rt-orig.jar(javax/management/remote/rmi/RMIServerImpl_Stub.class)
类文件包含错误的类: javax.management.remote.rmi.RMIJRMPServerImpl
请删除该文件或确保该文件位于正确的类路径子目录中。
1 个错误
3 个警告
make[2]: *** [initial-image-jdk] Error 1
make[1]: *** [jdk-build] Error 2
make: *** [build_product_image] Error 2
之前没有用javac编译，直接随便创建一个文件导致的这个问题。困扰好久。javac编译即可。做法见上。
PS: 一共经历快20多个问题，才折磨结束。勇士们，还是编译OpenJDK1.9去吧。环境和类库的地址的变化导致了这样一系列的问题。后续就是如何调试OpenJDK和使用Hostpot虚拟机了。
成功标志
Successfully remade target file `server-jdk-image'.
Must remake target `images'.
Successfully remade target file `images'.
File `images' does not exist.
Target `images' is double-colon and has no prerequisites.
Must remake target `images'.
>>>Finished making images @ Wed Dec 5 02:27:07 CST 2018 ...
Successfully remade target file `images'.
########################################################################
##### Leaving jdk for target(s) sanity all docs images #####
########################################################################
##### Build time 00:05:27 jdk for target(s) sanity all docs images #####
########################################################################
Successfully remade target file `jdk-build'.
Prerequisite `jdk-build' of target `/Users/Sean/Software/OpenJDK/build/bin/java' does not exist.
Must remake target `generic_build_repo_series'.
Successfully remade target file `generic_build_repo_series'.
File `generic_build_repo_series' does not exist.
Target `generic_build_repo_series' is double-colon and has no prerequisites.
Must remake target `generic_build_repo_series'.
#-- Build times ----------
Target all_product_build
Start 2018-12-05 02:20:50
End 2018-12-05 02:27:07
00:00:19 corba
00:00:17 hotspot
00:00:03 jaxp
00:00:08 jaxws
00:05:27 jdk
00:00:03 langtools
00:06:17 TOTAL
-------------------------
Successfully remade target file `generic_build_repo_series'.
Successfully remade target file `build_product_image'.
Must remake target `product_build'.
Successfully remade target file `product_build'.
Must remake target `all_product_build'.
Successfully remade target file `all_product_build'.
Must remake target `all'.
Successfully remade target file `all'.
Tips
javac与javap
javac 用来编译 ABC.java 文件，将之转换为ABC.class文件；javap是反编译工具，用来读取ABC.class文件内内容工具。两者都是
JDK的bin目录自带的工具。
参考: 反编译class文件并重新编译的方法
怎样加Java文件编译成class文件
- Makefile missing separator. Stop.怎么解决
遇到这个问题，一般是Makefile文件被改错了。因为Makefile文件要求每个命令前是需要以
TAB作为分隔符号。好好检查报错的Makefile文件。
Makefile missing separator. Stop.怎么解决
Others
一路下来，本地编译OpenJDK实属不易。有很多人通过虚拟机安装和Docker版本安装会轻松很多。
参考文章:
修改，编译，GDB调试openjdk8源码(docker环境下)
为什么要编译OpenJDK？
之前突然想到这个问题。编译好处在于可以定制化调试参数，定制化查看源码研究。而别人编译好的JDK二进制文件是无法修改的。这就是编译的好处。当然，运维，还是直接安装，类如rpm、yum install、apt-get省事的多。
Reference
[1]. 《深入理解Java虚拟机》
[2]. 第一章 Mac os下编译openJDK 7
[3]. Mac OSX 10.9 上build openjdk8和openjdk7
[4]. Mac OSX 10.9 上build openjdk8和openjdk7
[5]. Mac OSX 10.12.1 编译 Openjdk 9
[6]. Compiling OpenJDK 9 on OSX 10.11.x (El Capitan) / Xcode 7.3.1（这个patch的方法我没成功）
[7]. Mac 10.12.4 编译 openJDK7 记录
[1]. openJDK7源码编译和Hotspot调试
[2]. OpenJDK9 Hotspot java 虚拟机入口