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Honey, I built the JDK! (on Ubuntu)

Posted by cayhorstmann on June 13, 2006 at 2:09 PM PDT

??? style="float:left;padding-right:1ex" />As any mad scientist would do, just
to prove that it can be done, I decided to build Mustang on my shiny new
Ubuntu 6.06 "Dapper Drake" system. The href="http://download.java.net/jdk6/docs/build/build-linux.html">build
instructions warn you not to try this at home. The official build
environment is Redhat Enterprise Advanced Server 2.1 update 2, formerly
known as Redhat Advanced Server 2.1 update 2. Ugh.

I was not sure that this was going to work. Ubuntu is Debian based, and
it uses GCC 4.0, not GCC 3.2. As it turns out, the X11 headers have
recently moved to around, so I had some grief. But it all turned out well,
and I lived to tell the tale.

Why would anyone care? If you use Linux as your primary work OS (as I
do), and you switched to the increasingly popular Ubuntu, and you want to
tinker with the JDK, these instructions will save you time and
frustration. (Not that much time, maybe. It took me less than a day to
hack my way through.) For everyone else, it may be comforting to know that
someone with very limited system programming experience can do the build
in an unfamiliar environment. It certainly is a tribute to the Mustang
team who put this very complex build together.

Here are the instructions.

  1. In addition to the basic GCC tools, you need the following packages
    installed:
    • ksh
    • gawk
    • m4
    • libasound-dev
    • libcupsys2-dev
    • libx11-dev
  2. Install the binary Mustang distribution, e.g. in
    /home/me/jdk1.6.0
  3. You need a binary 1.5 distribution, e.g. in /home/me/jdk1.5.0
  4. Make directories for the source and the output, e.g.
    /home/me/mustangsrc and /home/me/mustangout
  5. Download and install the JARs
    cd mustangsrc
    java -jar ../downloads/jdk-6-rc-src-b87-jrl-09_jun_2006.jar
    java -jar ../downloads/jdk-6-rc-bin-b87-jrl-09_jun_2006.jar
    java -jar ../downloads/jdk-6-rc-mozilla_headers-b87-unix-09_jun_2006.jar
  6. Set environment variables
    unset JAVA_HOME
    export ALT_BOOTDIR=/home/me/jdk1.5.0
    export ALT_DEVTOOLS_PATH=/usr/bin
    export ALT_GCC29_PLUGIN_LIB_PATH=/home/me/jdk1.6.0/jre/plugin/i386/ns7-gcc29
    export ALT_MOZILLA_HEADERS_PATH=/home/me/mustangsrc/share/plugin/
    export ALT_OUTPUTDIR=/home/me/mustangout
    export MILESTONE=rc
    export BUILD_NUMBER=b87
  7. In Ubuntu, basename is in /usr/bin, not in
    /bin. In j2se/make/common/shared/Defs-utils.gmk, change the
    definition of BASENAME to BASENAME       = $(UTILS_USR_BIN_PATH)basename
  8. To avoid the error execvp: cp: Too many levels of symbolic
    links
    , make these changes:
    • In hotspot/make/Makefile, change the definition of CP
      from cp to /bin/cp:CP=/bin/cp
    • The file j2se/make/docs/Makefile has two cp that should
      be $(CP), in the tagletapidocs: target.
  9. GCC 4.0 is pickier than GCC 3.2. Therefore, we won't fail on
    warnings. Comment this out in j2se/make/docs/Makefile:# WARNINGS_ARE_ERRORS = -Werror
  10. GCC 4.0 complains when redefining an extern function as
    static. Comment out the word static in these function
    definitions:
    • j2se/src/solaris/hpi/native_threads/src/interrupt_md.c:113:
      error: static declaration of ‘sigignore’ follows
      non-static declaration
    • j2se/src/share/native/sun/awt/cmm/spsearch.c:1335: error: static
      declaration of ‘TestFileCB’ follows non-static
      declaration
    • j2se/src/share/back/error_messages.c:42: error: static
      declaration of ‘vprint_message’ follows non-static
      declaration
    • j2se/src/javaws/share/native/launchFile.c:66: error: static
      declaration of ‘iksSecureProperty’ follows non-static
      declaration
    • j2se/src/javaws/share/native/xmlparser.c:53: error: static
      declaration of ‘RemoveNonAsciiUTF8FromBuffer’ follows
      non-static declaration
    • j2se/src/solaris/native/sun/awt/awt_dnd.c:172: error: static
      declaration of ‘xerror_code’ follows non-static
      declaration
  11. In j2se/src/solaris/native/sun/awt/awt_motif21.c, comment out this
    declaration:
    /*
    extern XIC XmImGetXIC(
                                    Widget          w,
                            uint32_t    input_policy,
                            ArgList         args,
                            Cardinal        num_args) ;
    */
  12. I fixed the error PIC register ‘%ebx’ clobbered in
    ‘asm’
    in j2se/src/solaris/bin/java_md.c by commenting
    out %ebx in the clobber declaration "%eax", /* "%ebx", */ "%ecx", "%edx"I'd
    like some expert to tell me if that is ok.
  13. Ubuntu 6.06 has a different location for several X11 files. Make
    these changes:
    • In motif/lib/Xm/util/Makefile, change IRULESRC to IRULESRC=/etc/X11/config/cf
    • In j2se/make/sun/xawt/Makefile, change
      /usr/X11R6/include/X11/extensions to
      /usr/include/X11/extensions:
      ifeq ($(PLATFORM), linux)
        CPPFLAGS += -I/usr/include/X11/extensions -I$(MOTIF_DIR)/include -I$(OPENWIN_HOME)/include
      endif
      and in j2se/make/sun/awt/mawt.gmk, change /usr/X11R6/lib to /usr/lib
      (3x):
      LIBXT = /usr/lib/libXt.a
      LIBSM = /usr/lib/libSM.a
      LIBICE = /usr/lib/libICE.a
  14. The build href="http://download.java.net/jdk6/docs/build/build-linux.html">instructions
    told me to run make scsl, but then I got an error complaining
    about a missing jscheme/REPL. Following href="http://forums.java.net/jive/thread.jspa?forumID=25&threadID=16092&messageID=122131#122131">this
    advice, I picked up with make j2se, and voila, it
    worked.

  15. ??? style="float:left;padding-right:1ex" />It walks, it talks!
    cd /home/me/mustangout
    bin/java -jar demo/jfc/SwingSet2/SwingSet2.jar
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