编译 openJDK source code 札记

0. Prepare for Build

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sudo aptitude build-dep
sudo apt-get install gawk

1. Download JDK

  • 这次准备从官网的repo上直接取source code 先下载 mercurial 和 hg
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    sudo apt-get install mercurial
hg clone http://hg.openjdk.java.net/jdk7/jdk7
  • 其实真正的code 还没下载下来，需要运行 get_source.sh
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    cd jdk7/ && sh get_source.sh

2. Environment Setting

因为编译的时候可能会出现如下错误： ERROR: Cannot find source for project jaxp.

这个需要下载，所以需要在make选项添加 ALLOW_DOWNLOADS=true

最终的编译脚本如下：

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#!/bin/sh
export ALT_BOOTDIR=/usr/lib/jvm/java-7-openjdk-amd64/
export ALT_HOTSPOT_IMPORT_PATH=/local/code/lang/jdk1.7.0_13/
unset JAVA_HOME
make LANG=C ALLOW_DOWNLOADS=true DISABLE_HOTSPOT_OS_VERSION_CHECK=ok

2. Build

下面就是解决make出现的各种问题和解决方案：

  • ERROR: You do not have access to valid Cups header files.

需要安装cpus的dev包

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sudo apt-get install libcups2-dev
  • ERROR: The version of ant being used is older than the required version of '1.7.1'. The version of ant found was ''.

这说明没有装ant

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sudo apt-get install ant
  • ERROR: FreeType version 2.3.0 or higher is required.

安装freetype的dev包

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sudo apt-get install libfreetype6-dev
  • ERROR: You seem to not have installed ALSA 0.9.1 or higher.

不需要从ALSA官网下载alsa-dev和alsa-drive， ubuntu提供包的

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sudo apt-get install libasound2-dev
  • ERROR: echo "*** This OS is not supported:" 'uname -a'; exit 1;

很奇怪的错误，anyway，注释掉hotspot/make/linux/Makefile里面的checkOS

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check_os_version:
#ifeq ($(DISABLE_HOTSPOT_OS_VERSION_CHECK)$(EMPTY_IF_NOT_SUPPORTED),)
#	$(QUIETLY) >&2 echo "*** This OS is not supported:" `uname -a`; exit 1;
#endif

Update: 最好的办法是在make参数后面添加 DISABLE_HOTSPOT_OS_VERSION_CHECK=OK 即可

  • ERROR: error: "__LEAF" redefined [-Werror]

这个是已知的bug, 在hopspot下打入该patch即可

  • ERROR error: converting ‘false’ to pointer type ‘methodOop’ [-Werror=conversion-null]

这个的问题是把 false 转换成 NULL的时候出错了

同样在hotspot下 打入该 patch

  • ERROR gcc: error: unrecognized command line option '-mimpure-text'

这个-mimpure-text是gcc给Solaris的编译选项，所以注释掉即可

文件在./jdk/make/common/shared/Compiler-gcc.gmk +70

  • ERROR undefined reference to 'snd_pcm_format_**'

folow this link Build openjdk in Ubuntu 11.10 在jdk/make/javax/sound/jsoundalsa/Makefile 里面

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@@ -65,7 +65,7 @@
 	$(MIDIFILES_export) \
 	$(PORTFILES_export)
    
-LDFLAGS += -lasound
+OTHER_LDLIBS += -lasound

CPPFLAGS += \
 	-DUSE_DAUDIO=TRUE \

4. Success Output

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########################################################################
##### Leaving jdk for target(s) sanity all docs images             #####
########################################################################
##### Build time 00:05:35 jdk for target(s) sanity all docs images #####
########################################################################

-- Build times ----------
Target all_product_build
Start 2013-02-05 13:47:18
End   2013-02-05 13:53:04
00:00:03 corba
00:00:02 jaxp
00:00:03 jaxws
00:05:35 jdk
00:00:03 langtools
00:05:46 TOTAL
-------------------------