Building OpenJDK9 on MSYS2

Erik Joelsson erik.joelsson at oracle.com
Wed Oct 11 14:16:13 UTC 2017


Hello,

On 2017-10-11 15:48, Magnus Ihse Bursie wrote:
> For gcc, we let the compiler generate the .d file. For the Microsoft 
> tool chain, we use a clever sed script to extract and create it ourself.
>
> I think that logic is checking for "Windows", not "Microsoft". That 
> might be your cause of trouble.
>
> Look in NativeCompilation.gmk.
>
That was my initial thought as well, but we do correctly check  for 
microsoft. Also it's not the .d files that are the problem. As Peter 
just wrote, they look fine. It's the .d.target files which we create 
using the same technique on all platforms. What we don't account for is 
the compiler putting Windows mixed paths in the .d files.
> /Magnus
>
> 11 okt. 2017 kl. 14:43 skrev Peter Budai <peterbudai at hotmail.com 
> <mailto:peterbudai at hotmail.com>>:
>
>> Hi Erik,
>>
>> The .d file looks like this:
>>
>> C:/msys64/home/peterbud/jdk9/build/windows-x86_64-normal-server-release/hotspot/variant-server/tools/adlc/objs/adlparse.obj: 
>> \
>>
>> C:/msys64/home/peterbud/jdk9/hotspot/src/share/vm/adlc/adlparse.cpp \
>>
>> I have checked .d.targets file, and looks like it has the first line 
>> has not been deleted, and the file names below are also wrong:
>>
>> /msys64/home/peterbud/jdk9/build/windows-x86_64-normal-server-release/hotspot/variant-server/tools/adlc/objs/adlparse.obj 
>> : :
>>
>> /msys64/home/peterbud/jdk9/hotspot/src/share/vm/adlc/adlparse.cpp :
>>
>> /msys64/home/peterbud/jdk9/hotspot/src/share/vm/adlc/adlc.hpp :
>>
>> I guess this part in the DEPENDENCY_TARGET_SED_PATTERN is fooled by 
>> the “C:/”
>>
>> -e 's/^[^:]*: *//'
>>
Yes, that does indeed look like the problem. I suppose the regexp is 
unnecessarily strict. It should be ok to rewrite it as something like this:
-e 's/^.*: *//'

Basically just make sure it ends with : and any number of spaces.

/Erik

>> Peter
>>
>> Sent from Mail <https://go.microsoft.com/fwlink/?LinkId=550986> for 
>> Windows 10
>>
>> *From: *Erik Joelsson <mailto:erik.joelsson at oracle.com>
>> *Sent: *Wednesday, October 11, 2017 12:16 PM
>> *To: *Peter Budai <mailto:peterbudai at hotmail.com>; Magnus Ihse Bursie 
>> <mailto:magnus.ihse.bursie at oracle.com>; build-dev at openjdk.java.net 
>> <mailto:build-dev at openjdk.java.net>
>> *Subject: *Re: Building OpenJDK9 on MSYS2
>>
>> Hello Peter,
>>
>> On 2017-10-11 00:18, Peter Budai wrote:
>>
>>     Thanks Magnus & Erik
>>
>>     First thanks for your support and kind words!
>>
>>     Magnus, I have checked .bash_profile, .bashrc but they seem to be
>>     empty (everything is commented out). You can check with a default
>>     MSYS2 install, I have not changed these files at all. If you find
>>     thee something specific I can give a try here as well.
>>
>>     Let me give also a quick status update, where am I with building
>>     hotspot:
>>
>>     ·I guess its still the beginning, but I have managed to compile
>>     jvm.dll with almost 700 object file: with debug info the dll is
>>     around 700 MB ��
>>
>>     ·I made only surgical, minimal changes to the source, and so far
>>     it looks reasonable. I have encountered 3 scenarios where changes
>>     were necessary:
>>
>>     oWhen in makefiles conditionals were using assuming that if
>>     target_os is windows then it is visual studio compiler/linker.
>>     Obviously these conditionals had to be reviewed in a few places
>>     and if necessary were changes to check the toolchain=Microsoft
>>
>> These are not surprising and should be pretty straight forward to fix 
>> and it seems you know what to do.
>>
>>     ·
>>
>>     oI got a few warnings as gcc 7.2 uncovered some code problems in
>>     windows specific codes, where before that MSVC I guess did not
>>     say a word…
>>
>> To get around this you can configure with 
>> --disable-warnings-as-errors until you get things working properly. 
>> This is commonly needed when using compiler versions that we normally 
>> don't use.
>>
>>     ·
>>
>>     oAnd I had like 6-7 places where the code was using MSVC specific
>>     __try … __except structures which gcc does not know. Do you have
>>     a suggestion how to approach them? I can do ugly #ifdefs (I would
>>     avoid that) but I have also seen some solutions to replace them
>>     with a code which gcc can compile
>>     (http://www.programmingunlimited.net/siteexec/content.cgi?page=mingw-seh
>>     ) – but before doing that  though I would ask first you on the
>>     purpose of those
>>
>> This kind of question is probably best to bring to the hotspot 
>> mailing list.
>>
>>     ·What bothers me is that I was not able to do incremental builds:
>>     when an error occurs, and build stops, then after making change
>>     in the CPP source the build cannot continue, I always got an
>>     error message:
>>
>>     |/C/msys64/home/peterbud/jdk9/build/windows-x86_64-normal-server-release/hotspot/variant-server/tools/adlc/objs/adlparse.d.targets:1:
>>     *** missing target pattern.  Stop.|
>>     |make[2]: *** [make/Main.gmk:256: hotspot-server-gensrc] Error 2|
>>
>>     If I do a ‘make clean’ and restart the build then it nicely compiles.
>>
>>     Question 1: Is there a way to  resume such builds without ‘make
>>     clean’?
>>
>> Well, incremental builds is supposed to work well. We have several 
>> extra tricks in there to handle cases where normal make builds would 
>> fail. The *.d.targets files is one such trick and it seems to 
>> backfire for you. The contents of that file should be something like:
>>
>> /localhome/hg/jdk9-dev/hotspot/src/share/vm/adlc/adlparse.cpp :
>> /localhome/hg/jdk9-dev/hotspot/src/share/vm/adlc/adlc.hpp :
>> /localhome/hg/jdk9-dev/hotspot/src/share/vm/opto/opcodes.hpp :
>> /localhome/hg/jdk9-dev/hotspot/src/share/vm/opto/classes.hpp :
>> /localhome/hg/jdk9-dev/hotspot/src/share/vm/adlc/arena.hpp :
>> /localhome/hg/jdk9-dev/hotspot/src/share/vm/opto/adlcVMDeps.hpp :
>> /localhome/hg/jdk9-dev/hotspot/src/share/vm/adlc/filebuff.hpp :
>> /localhome/hg/jdk9-dev/hotspot/src/share/vm/adlc/dict2.hpp :
>> /localhome/hg/jdk9-dev/hotspot/src/share/vm/adlc/forms.hpp :
>> /localhome/hg/jdk9-dev/hotspot/src/share/vm/adlc/formsopt.hpp :
>> /localhome/hg/jdk9-dev/hotspot/src/share/vm/adlc/formssel.hpp :
>> /localhome/hg/jdk9-dev/hotspot/src/share/vm/adlc/archDesc.hpp :
>> /localhome/hg/jdk9-dev/hotspot/src/share/vm/adlc/adlparse.hpp :
>>
>> Basically an empty rule for each dependency for the corresponding 
>> object file. Declaring these rules makes it possible to delete source 
>> files without having to build clean. It seems your file is not 
>> generated correctly so please have a look inside it. The file is in 
>> make/common/NativeCompilation.gmk, look for 
>> DEPENDENCY_TARGET_SED_PATTERN.
>>
>>     Question 2: What would be the best way to submit/share the
>>     patches for your thorough review?
>>
>> Well, first of all, have you signed the OCA?
>>
>> As for publishing patches and reviews, there is a bit of chicken and 
>> egg problem. Once you become an "author" in any of the OpenJDK 
>> projects, you get a user name and should be able to publish reviews 
>> on cr.openjdk.java.net <http://cr.openjdk.java.net>. Before that, if 
>> the patch is small, it can be posted inline in an email to the list. 
>> If it's large, you will need a current OpenJDK user to host it for 
>> you. At least that's how I understand it. Hopefully someone who knows 
>> the process better can chime in here.
>>
>> I should also let you know that getting this into JDK 9 is most 
>> likely not going to happen. AFAIK we are only doing security updates 
>> for 9. It would have to go into the currently active release. I 
>> should also warn you that new ports generally need a certain amount 
>> of backing to be accepted. It may be that this would have to live in 
>> a porting side project. Hopefully someone who knows this better can 
>> chime in here as well.
>>
>> /Erik
>>
>>     P.
>>
>>     Sent from Mail <https://go.microsoft.com/fwlink/?LinkId=550986>
>>     for Windows 10
>>
>>     *From: *Magnus Ihse Bursie <mailto:magnus.ihse.bursie at oracle.com>
>>     *Sent: *Tuesday, October 10, 2017 10:04 AM
>>     *To: *Peter Budai <mailto:peterbudai at hotmail.com>; Erik Joelsson
>>     <mailto:erik.joelsson at oracle.com>; build-dev at openjdk.java.net
>>     <mailto:build-dev at openjdk.java.net>
>>     *Subject: *Re: Building OpenJDK9 on MSYS2
>>
>>     On 2017-10-07 10:14, Peter Budai wrote:
>>
>>         The configure of OpenJDK overwrites the SHELL. Actually it is
>>         using bash, but for the arguments it was using “-e -o
>>         pipefail”. I have figured that for MSYS2 bash what is needed
>>         as bash arguments is “-e -l -c -o pipefail”
>>
>>         That looks like solving this problem, and now the real issues
>>         are surfacing.
>>
>>
>>     FWIW, "-l" makes bash behave like a login shell. Most likely you
>>     are changing bash's behavior in one of your login scripts, and
>>     that change is what's really needed.
>>
>>     /Magnus
>>
>>
>>
>>         Peter
>>
>>         *From: *Peter Budai <mailto:peterbudai at hotmail.com>
>>         *Sent: *Friday, October 6, 2017 6:43 PM
>>         *To: *Magnus Ihse Bursie
>>         <mailto:magnus.ihse.bursie at oracle.com>; Erik Joelsson
>>         <mailto:erik.joelsson at oracle.com>; build-dev at openjdk.java.net
>>         <mailto:build-dev at openjdk.java.net>
>>         *Subject: *RE: Building OpenJDK9 on MSYS2
>>
>>         Magnus,
>>
>>         I have followed your suggestion and removed the fixpath
>>         prefixes from gcc related compile tools, and left only the
>>         fixpath prefix _only_ for the Boot JDK related tools in place.
>>
>>         1)As  I follow the process, all java and javac related
>>         compile steps are running properly
>>
>>         2)When the process reaches gcc related steps I got the error
>>         message at the same place as before (no fixpath). If I
>>         execute that command from the bash prompt, it creates the
>>         output:
>>
>>         $ ( /usr/bin/gawk '/@@END_COPYRIGHT@@/{exit}1'
>>         /C/msys64/home/peterbud/jdk9/jdk/src/java.base/share/classes/sun/nio/ch/SocketOptionRegistry.java.template
>>         && /C/msys64/mingw64/bin/gcc -E -x c
>>         /C/msys64/home/peterbud/jdk9/jdk/src/java.base/share/classes/sun/nio/ch/SocketOptionRegistry.java.template
>>         2> >(/usr/bin/grep -v '^SocketOptionRegistry.java.template$'
>>         >&2) | /usr/bin/gawk '/@@START_HERE@@/,0' |  /usr/bin/sed -e
>>         's/@@START_HERE@@/\/\/ AUTOMATICALLY GENERATED FILE - DO NOT
>>         EDIT/' -e 's/PREFIX_//' -e 's/^#.*//' ) >
>>         /C/msys64/home/peterbud/jdk9/build/windows-x86_64-normal-server-release/support/gensrc/java.base/sun/nio/ch/SocketOptionRegistry.java
>>
>>         As I have mentioned the parameters are replaced by the bash
>>         automatically
>>
>>         3)Then build continues, then little later stops at a super
>>         simple command:
>>
>>         mv
>>         /C/msys64/home/peterbud/jdk9/build/windows-x86_64-normal-server-release/support/gensrc/java.base/java/nio/ByteBuffer.java.tmp
>>         /C/msys64/home/peterbud/jdk9/build/windows-x86_64-normal-server-release/support/gensrc/java.base/java/nio/ByteBuffer.java
>>
>>         Needless to say, the ByteBuffer.java.tmp file DOES exist. And
>>         running the above command from the bash works, and build
>>         continues.
>>
>>         4)A few similar cases (stops) with DirectByteBuffer and
>>         DirectByteBufferR
>>
>>         Currently I try to explore how that might relate to the MSYS2
>>         bash and make, somehow it behaves differently
>>
>>         If you have any other suggestion, let me know.
>>
>>         Best regards,
>>
>>         Peter
>>
>>         *From: *Peter Budai <mailto:peterbudai at hotmail.com>
>>         *Sent: *Thursday, October 5, 2017 3:52 PM
>>         *To: *Magnus Ihse Bursie
>>         <mailto:magnus.ihse.bursie at oracle.com>; Erik Joelsson
>>         <mailto:erik.joelsson at oracle.com>; build-dev at openjdk.java.net
>>         <mailto:build-dev at openjdk.java.net>
>>         *Subject: *RE: Building OpenJDK9 on MSYS2
>>
>>         Hi Magnus,
>>
>>         So first of all, here is the current patch, which I was not
>>         able to attach: https://pastebin.com/pwT4Ynxc
>>
>>         >> That's surprising, since gcc is prefixed with fixpath, which
>>         it should not.
>>
>>         Actually you DO need fixpath IMHO.
>>
>>         This is a mingw64 version of the gcc
>>         (/C/msys64/mingw64/bin/gcc), which is a fully functional
>>         Windows executable, /which expects Windows formatted path
>>         arguments/.
>>
>>         As the updated build process uses EXPORT
>>         MSYS2_ARG_CONV_EXCL=* (see that patch), none of the command
>>         line arguments are converted  from the unix path to Windows,
>>         but fixpath does that conversion. There is a wiki describing
>>         more details on this:
>>
>>         https://github.com/msys2/msys2/wiki/Porting#user-content-filesystem-namespaces
>>
>>
>>         >>I have a hard time believing this is a race condition. On
>>         the other hand, this stuff is weird, we're misusing the C
>>         preprocessor to process defines in java code, so I'm not
>>         surprised it breaks down.
>>
>>         >>I don't know why it succeeded when run on the command line,
>>         though.
>>
>>         When I execute that command from the /bash/ command line
>>         there is no EXPORT MSYS2_ARG_CONV_EXCL, but the bash itself
>>         does the automatic conversion of the arguments. Maybe it has
>>         something to do how fixpath does CreateProcess?
>>
>>         Does that help?
>>
>>         Best regards,
>>
>>         Peter
>>
>>         Sent from Mail
>>         <https://go.microsoft.com/fwlink/?LinkId=550986> for Windows 10
>>
>>         *From: *Magnus Ihse Bursie <mailto:magnus.ihse.bursie at oracle.com>
>>         *Sent: *Thursday, October 5, 2017 12:13 PM
>>         *To: *Peter Budai <mailto:peterbudai at hotmail.com>; Erik
>>         Joelsson <mailto:erik.joelsson at oracle.com>;
>>         build-dev at openjdk.java.net <mailto:build-dev at openjdk.java.net>
>>         *Subject: *Re: Building OpenJDK9 on MSYS2
>>
>>         On 2017-10-05 11:59, Peter Budai wrote:
>>
>>             Hi Magnus and Erik,
>>
>>             I really appreciate your quick feedback. I assumed that
>>             it won’t be easy, but I just don’t feel I should give up
>>             now  - maybe later when I see the real scale of work. So
>>             bear with me for a time being.
>>
>>             Attached is a patch which already includes Magnus’
>>             changes, plus a few which I have added:
>>
>>             ·basically enabling gcc for windows,
>>
>>             ·and modifying a logic for compiling fixpath (before that
>>             it was using hard-coded MS VSC compile flags)
>>
>>
>>         Actually, you must make sure fixpath is *not* used for the
>>         toolchain, since gcc uses unix style paths.
>>         (However, other tools such as java will still need it.)
>>
>>
>>
>>             So here is what I have as the result of configure:
>>
>>             ====================================================
>>
>>             The existing configuration has been successfully updated in
>>
>>             /C/msys64/home/peterbud/jdk9/build/windows-x86_64-normal-server-release
>>
>>             using configure arguments '--disable-freetype-bundling
>>             --disable-javac-server'.
>>
>>             Configuration summary:
>>
>>             * Debug level:    release
>>
>>             * HS debug level: product
>>
>>             * JDK variant:    normal
>>
>>             * JVM variants:   server
>>
>>             * OpenJDK target: OS: windows, CPU architecture: x86,
>>             address length: 64
>>
>>             * Version string: 9-internal+0-adhoc.peterbud.jdk9
>>             (9-internal)
>>
>>             Tools summary:
>>
>>             * Environment:    msys version 2.9.0(0.318/5/3) (root at
>>             /C/msys64)
>>
>>             * Boot JDK:       java version "1.8.0_144"  Java(TM) SE
>>             Runtime Environment (build 1.8.0_144-b01)  Java
>>             HotSpot(TM) 64-Bit Server VM (build 25.144-b01, mixed
>>             mode)   (at /c/progra~1/java/jdk18~1.0_1)
>>
>>             * Toolchain:      gcc (GNU Compiler Collection)
>>
>>             * C Compiler:     Version 7.2.0 (at
>>             /C/msys64/mingw64/bin/gcc)
>>
>>             * C++ Compiler:   Version 7.2.0 (at
>>             /c/msys64/mingw64/bin/g++)
>>
>>             Build performance summary:
>>
>>             * Cores to use:   4
>>
>>             * Memory limit:   16216 MB
>>
>>             Its clear says that the toolchain is gcc 7.2 (BTW there
>>             is no Visual Studio on this machine)
>>
>>             Now for the details of the config log, you can see here:
>>             https://pastebin.com/MN2ZYcHH
>>
>>             And about the build process and the error I get:
>>
>>             $ make JOBS=1
>>
>>             Building target 'default (exploded-image)' in
>>             configuration 'windows-x86_64-normal-server-release'
>>
>>             Compiling 8 files for BUILD_TOOLS_LANGTOOLS
>>
>>             Compiling 17 properties into resource bundles for
>>             jdk.compiler
>>
>>             Parsing 1 properties into enum-like class for jdk.compiler
>>
>>             Compiling 19 properties into resource bundles for jdk.javadoc
>>
>>             Compiling 12 properties into resource bundles for jdk.jdeps
>>
>>             Compiling 7 properties into resource bundles for jdk.jshell
>>
>>             Compiling 117 files for BUILD_INTERIM_java.compiler
>>
>>             Compiling 396 files for BUILD_INTERIM_jdk.compiler
>>
>>             Compiling 61 files for BUILD_INTERIM_jdk.jdeps
>>
>>             Compiling 457 files for BUILD_INTERIM_jdk.javadoc
>>
>>             Note: Some input files use or override a deprecated API.
>>
>>             Note: Recompile with -Xlint:deprecation for details.
>>
>>             Compiling 159 files for BUILD_TOOLS_JDK
>>
>>             Note: Some input files use unchecked or unsafe operations.
>>
>>             Note: Recompile with -Xlint:unchecked for details.
>>
>>             make[3]: *** [GensrcMisc.gmk:78:
>>             /C/msys64/home/peterbud/jdk9/build/windows-x86_64-normal-server-release/support/gensrc/java.base/sun/nio/ch/SocketOptionRegistry.java]
>>             Error 1
>>
>>             make[3]: *** Deleting file
>>             '/C/msys64/home/peterbud/jdk9/build/windows-x86_64-normal-server-release/support/gensrc/java.base/sun/nio/ch/SocketOptionRegistry.java'
>>
>>             make[2]: *** [make/Main.gmk:115: java.base-gensrc-jdk]
>>             Error 2
>>
>>             ERROR: Build failed for target 'default (exploded-image)'
>>             in configuration 'windows-x86_64-normal-server-release'
>>             (exit code 2)
>>
>>             No indication of failed target found.
>>
>>             Hint: Try searching the build log for '] Error'.
>>
>>             Hint: See common/doc/building.html#troubleshooting for
>>             assistance.
>>
>>             make[1]: *** [/home/peterbud/jdk9/make/Init.gmk:296:
>>             main] Error 2
>>
>>             make: *** [/home/peterbud/jdk9/make/Init.gmk:185:
>>             default] Error 2
>>
>>             If I run here
>>
>>             make JOBS=1 LOG=debug
>>
>>             The failing line seems to be this:
>>
>>             ( /usr/bin/gawk '/@@END_COPYRIGHT@@/{exit}1'
>>             /C/msys64/home/peterbud/jdk9/jdk/src/java.base/share/classes/sun/nio/ch/SocketOptionRegistry.java.template
>>             &&
>>             /C/msys64/home/peterbud/jdk9/build/windows-x86_64-normal-server-release/configure-support/bin/fixpath.exe
>>             -m/C/msys64/@/c/msys64/@/c/progra~
>>             /C/msys64/mingw64/bin/gcc -E -x c
>>             /C/msys64/home/peterbud/jdk9/jdk/src/java.base/share/classes/sun/nio/ch/SocketOptionRegistry.java.template
>>             2> >(/usr/bin/grep -v
>>             '^SocketOptionRegistry.java.template$' >&2) |
>>             /usr/bin/gawk '/@@START_HERE@@/,0' | /usr/bin/sed -e
>>             's/@@START_HERE@@/\/\/ AUTOMATICALLY GENERATED FILE - DO
>>             NOT EDIT/' -e 's/PREFIX_//' -e 's/^#.*//' ) >
>>             /C/msys64/home/peterbud/jdk9/build/windows-x86_64-normal-server-release/support/gensrc/java.base/sun/nio/ch/SocketOptionRegistry.java
>>
>>             make[3]: *** [GensrcMisc.gmk:78:
>>             /C/msys64/home/peterbud/jdk9/build/windows-x86_64-normal-server-release/support/gensrc/java.base/sun/nio/ch/SocketOptionRegistry.java]
>>             Error 1
>>
>>             Now the interesting is: if I copy this line above to the
>>             bash prompt, it runs without problem, and the file
>>             support/gensrc/java.base/sun/nio/ch/SocketOptionRegistry.java
>>
>>         That's surprising, since gcc is prefixed with fixpath, which
>>         it should not.
>>
>>         I have a hard time believing this is a race condition. On the
>>         other hand, this stuff is weird, we're misusing the C
>>         preprocessor to process defines in java code, so I'm not
>>         suprised it breaks down. I don't know why it succeeded when
>>         run on the command line, though. My suggestion is to just do
>>         some quick and dirty hack around this: take the file you
>>         manage to generate and just copy it in during the build
>>         instead. If you can get round this, you might start seeing
>>         some *real* problems. :-)
>>
>>         Also, my suggestion is that you try running "make hotspot" to
>>         cut to the chase. Compiling hotspot will likely be the
>>         hardest thing. Or even "make -k hotspot" to get an assessment
>>         of the amount of work ahead of you.
>>
>>         /Magnus
>>
>>             Is produced.
>>
>>             Then I can again issue
>>
>>             make JOBS=1 LOG=debug
>>
>>             And the compile process is being continued, until a
>>             similar error pops up with a different generated file. I
>>             have an assumption that this happens because make is
>>             still running parallel jobs, despite JOBS=1 but I’m not sure.
>>
>>             How could I best tackle this?
>>
>>             Thank you and best regards,
>>
>>             Peter
>>
>>             Sent from Mail
>>             <https://go.microsoft.com/fwlink/?LinkId=550986> for
>>             Windows 10
>>
>>             *From: *Magnus Ihse Bursie
>>             <mailto:magnus.ihse.bursie at oracle.com>
>>             *Sent: *Thursday, October 5, 2017 11:33 AM
>>             *To: *Erik Joelsson <mailto:erik.joelsson at oracle.com>;
>>             Peter Budai <mailto:peterbudai at hotmail.com>;
>>             build-dev at openjdk.java.net
>>             <mailto:build-dev at openjdk.java.net>
>>             *Subject: *Re: Building OpenJDK9 on MSYS2
>>
>>             On 2017-10-05 10:10, Erik Joelsson wrote:
>>             > Hello Peter,
>>             >
>>             >
>>             > On 2017-10-04 21:15, Peter Budai wrote:
>>             >> Hi Magnus,
>>             >>
>>             >> Thanks for the quick reply I’ll check these patches
>>             with msys2.
>>             >>
>>             >> Let me specify with more details what I’d like to
>>             achieve: I’d like
>>             >> to build OpenJDK9 with MSYS2 MINGW64 environment using
>>             gcc toolchain.
>>             >> (I’m not sure how familiar are you with MSYS2, but
>>             there are 3
>>             >> different environments: MSYS2, MINGW32 and MINGW64).
>>             In theory
>>             >> MINGW64 with gcc is the closes you can get on Windows
>>             platform as a
>>             >> gcc unix like build environment, which produces still
>>             a native 64-bit
>>             >> executable on Windows.
>>             >>
>>             >> I’m not very familiar with OpenJDK yet, so therefore
>>             I’d like to hear
>>             >> your opinion: how realistic is that?
>>             > Sorry to disappoint, but I would say that requires
>>             major work. There
>>             > is a strong historic assumption that windows builds are
>>             done using
>>             > Visual Studio. We have abstracted away some of it in
>>             configure (see
>>             > TOOLCHAIN_TYPE), but it's very far from enough to
>>             change compiler
>>             > environment for a Windows build. The native sources are
>>             also bound to
>>             > make a lot of such assumptions. I would expect the
>>             changes needed to
>>             > be in the thousands of lines of code.
>>
>>             I agree that it requires hard work (even if "thousands"
>>             might be an
>>             overestimation I think, but "hundreds" is not enough, so
>>             it's the right
>>             magnitude). On the other hand, it would be really good if
>>             we did sort
>>             things out, so that we had proper conditions based on OS vs
>>             compiler/toolchain.
>>
>>             If you really want to start, the first thing is to patch
>>             toolchain.m4 to
>>             VALID_TOOLCHAINS_windows="microsoft gcc"
>>             and then call configure using "bash configure
>>             --with-toolchain-type=gcc".
>>
>>             As Erik, I doubt you will come very far before things
>>             starts tumbling down.
>>
>>             >
>>             > When we say supporting the build in msys2 instead of
>>             cygwin, we just
>>             > mean using msys2 as the unix emulating layer for our
>>             tools like
>>             > make/bash/grep/sed etc.
>>             >
>>             > One think I have done successfully is running the build
>>             in WSL
>>             > (Windows Subsystem for Linux), but that isn't all that
>>             helpful as WSL
>>             > for practical purposes is more or less like running
>>             Linux in a VM, so
>>             > the build sees a Linux system and builds a Linux binary.
>>             >> As a side note: with MINGW64 I have managed to run
>>             configure phase
>>             >> successfully for OpenJDK. The compile process has also
>>             started and
>>             >> went for a while, but interestingly I run into some
>>             kind of race
>>             >> conditions as make stopped with an error. Using
>>             LOG=debug I have fond
>>             >> the failing line and then copying the failed command
>>             and pasting it
>>             >> to the bash prompt it successfully generated the
>>             output target, and
>>             >> then the build process run further when a similar
>>             situation happened.
>>             >> Also pasting the failed command run in the bash
>>             without any problem,
>>             >> and build continued… until the next.
>>             > Without seeing the errors I can't say much. I very much
>>             doubt that you
>>             > are running with gcc as the compiler though. Configure
>>             isn't easily
>>             > fooled into using a different compiler to what it
>>             prefers, and I would
>>             > expect things to crash and burn pretty early if you
>>             actually did.
>>             >
>>             > /Erik
>>             >>
>>             >> I have tried to run make JOBS=1, but did not help,
>>             strangely I have
>>             >> still seen in the log make[3] and make[4] logs which
>>             suggested that
>>             >> there are more than one make jobs were running. Also
>>             tried .configure
>>             >> --with-output-sync=recurse without success (same symptoms)
>>             >>
>>             >> Let me know your thoughts.
>>             >>
>>             >> Best regards,
>>             >>
>>             >> Peter
>>             >>
>>             >> Sent from
>>             Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for
>>             >> Windows 10
>>             >>
>>             >> From: Magnus Ihse
>>             Bursie<mailto:magnus.ihse.bursie at oracle.com>
>>             >> Sent: Wednesday, October 4, 2017 1:04 AM
>>             >> To: Peter Budai<mailto:peterbudai at hotmail.com>;
>>             >> build-dev at openjdk.java.net
>>             <mailto:build-dev at openjdk.java.net><mailto:build-dev at openjdk.java.net>
>>             <mailto:build-dev at openjdk.java.net>
>>             >> Subject: Re: Building OpenJDK9 on MSYS2
>>             >>
>>             >> Actually, it wasn't so much remaining trouble. :-) I
>>             fired up msys2 and
>>             >> checked out where I left off. It turned out that the
>>             remaining snag was
>>             >> that msys2 tries to convert command lines
>>             automatically, from "unix"
>>             >> style paths to "windows" style paths. Unfortunately,
>>             it does not do this
>>             >> very well and it breaks all sorts of things. We
>>             already have a FIXPATH
>>             >> solution in place which deals with this, so basically
>>             all I had to do
>>             >> was disable this (by setting MSYS2_ARG_CONV_EXCL to
>>             "*"). However, this
>>             >> broke our cygpath replacement hack (!) so I had to
>>             disable it there.
>>             >> Sigh. Anyway, with those fixes it ran and worked well.
>>             (I also
>>             >> discovered and fixed a bug related to how we set up
>>             the FIXPATH variable
>>             >> on msys, but it only triggers in certain circumstances).
>>             >>
>>             >> With this patch I now jdk9 seems to build fine on
>>             msys2. It should apply
>>             >> cleanly on jdk9/jdk9. Since it turned out to be so
>>             trivial, I'll try to
>>             >> get it in in jdk10.
>>             >>
>>             >> Here's the patch if you want to apply it yourself:
>>             >>
>>             >> diff -r a08cbfc0e4ec common/autoconf/basics_windows.m4
>>             >> --- a/common/autoconf/basics_windows.m4    Thu Aug 03
>>             18:56:56 2017
>>             >> +0000
>>             >> +++ b/common/autoconf/basics_windows.m4    Wed Oct 04
>>             00:53:58 2017
>>             >> +0200
>>             >> @@ -42,7 +42,7 @@
>>             >>        windows_path=`$CYGPATH -m "$unix_path"`
>>             >>        $1="$windows_path"
>>             >>      elif test "x$OPENJDK_BUILD_OS_ENV" =
>>             "xwindows.msys"; then
>>             >> -    windows_path=`cmd //c echo $unix_path`
>>             >> +    windows_path=`MSYS2_ARG_CONV_EXCL= cmd //c echo
>>             $unix_path`
>>             >>        $1="$windows_path"
>>             >>      fi
>>             >>    ])
>>             >> @@ -136,6 +136,16 @@
>>             >>      fi
>>             >>    ])
>>             >>
>>             >> +AC_DEFUN([BASIC_MSYS_UPDATE_FIXPATH],
>>             >> +[
>>             >> +  # Take all collected prefixes and turn them into a
>>             >> -m/c/foo@/c/bar at ... command line
>>             >> +  # @ was chosen as separator to minimize risk of
>>             other tools messing
>>             >> around with it
>>             >> +  all_unique_prefixes=`echo
>>             "${all_fixpath_prefixes@<:@@@:>@}" \
>>             >> +      | tr ' ' '\n' | $GREP '^/./' | $SORT | $UNIQ`
>>             >> +  fixpath_argument_list=`echo $all_unique_prefixes  |
>>             tr ' ' '@'`
>>             >> +  FIXPATH="$FIXPATH_BIN -m$fixpath_argument_list"
>>             >> +])
>>             >> +
>>             >>    AC_DEFUN([BASIC_FIXUP_PATH_MSYS],
>>             >>    [
>>             >>      path="[$]$1"
>>             >> @@ -143,7 +153,7 @@
>>             >>      new_path="$path"
>>             >>      if test "x$has_colon" = x; then
>>             >>        # Not in mixed or Windows style, start by that.
>>             >> -    new_path=`cmd //c echo $path`
>>             >> +    new_path=`MSYS2_ARG_CONV_EXCL= cmd //c echo $path`
>>             >>      fi
>>             >>
>>             >> BASIC_MAKE_WINDOWS_SPACE_SAFE_MSYS([$new_path])
>>             >> @@ -155,6 +165,8 @@
>>             >>
>>             >>      # Save the first 10 bytes of this path to the
>>             storage, so fixpath
>>             >> can work.
>>             >> all_fixpath_prefixes=("${all_fixpath_prefixes@<:@@@:>@}"
>>             >> "${new_path:0:10}")
>>             >> +  # We might need to re-evaluate FIXPATH.
>>             >> +  BASIC_MSYS_UPDATE_FIXPATH
>>             >>    ])
>>             >>
>>             >> AC_DEFUN([BASIC_FIXUP_EXECUTABLE_CYGWIN],
>>             >> @@ -293,7 +305,7 @@
>>             >>        # Do not save /bin paths to all_fixpath_prefixes!
>>             >>      else
>>             >>        # Not in mixed or Windows style, start by that.
>>             >> -    new_path=`cmd //c echo $new_path`
>>             >> +    new_path=`MSYS2_ARG_CONV_EXCL= cmd //c echo
>>             $new_path`
>>             >> BASIC_MAKE_WINDOWS_SPACE_SAFE_MSYS([$new_path])
>>             >>        # Output is in $new_path
>>             >> BASIC_WINDOWS_REWRITE_AS_UNIX_PATH(new_path)
>>             >> @@ -302,6 +314,8 @@
>>             >>
>>             >>        # Save the first 10 bytes of this path to the
>>             storage, so fixpath
>>             >> can work.
>>             >> all_fixpath_prefixes=("${all_fixpath_prefixes@<:@@@:>@}"
>>             >> "${new_path:0:10}")
>>             >> +    # We might need to re-evaluate FIXPATH.
>>             >> +    BASIC_MSYS_UPDATE_FIXPATH
>>             >>      fi
>>             >>    ])
>>             >>
>>             >> @@ -347,6 +361,10 @@
>>             >>        WINDOWS_ENV_VENDOR='msys'
>>             >> WINDOWS_ENV_VERSION="$MSYS_VERSION"
>>             >>
>>             >> +    # Prohibit msys2 path conversion from trying to
>>             be "intelligent",
>>             >> and rely
>>             >> +    # on fixpath instead.
>>             >> +    export MSYS2_ARG_CONV_EXCL="*"
>>             >> +
>>             >>        AC_MSG_CHECKING([msys root directory as
>>             unix-style path])
>>             >>        # The cmd output ends with Windows line endings
>>             (CR/LF), the grep
>>             >> command will strip that away
>>             >>        MSYS_ROOT_PATH=`cd / ; cmd /c cd | $GREP ".*"`
>>             >> @@ -391,10 +409,7 @@
>>             >>        elif test "x$OPENJDK_BUILD_OS_ENV" =
>>             xwindows.msys; then
>>             >>          # Take all collected prefixes and turn them
>>             into a
>>             >> -m/c/foo@/c/bar at ... command line
>>             >>          # @ was chosen as separator to minimize risk
>>             of other tools
>>             >> messing around with it
>>             >> -      all_unique_prefixes=`echo
>>             "${all_fixpath_prefixes@<:@@@:>@}" \
>>             >> -          | tr ' ' '\n' | $GREP '^/./' | $SORT | $UNIQ`
>>             >> -      fixpath_argument_list=`echo
>>             $all_unique_prefixes  | tr ' ' '@'`
>>             >> -      FIXPATH="$FIXPATH_BIN -m$fixpath_argument_list"
>>             >> +      BASIC_MSYS_UPDATE_FIXPATH
>>             >>        fi
>>             >>        FIXPATH_SRC_W="$FIXPATH_SRC"
>>             >>        FIXPATH_BIN_W="$FIXPATH_BIN"
>>             >> diff -r a08cbfc0e4ec common/autoconf/build-aux/config.sub
>>             >> --- a/common/autoconf/build-aux/config.sub    Thu Aug
>>             03 18:56:56
>>             >> 2017 +0000
>>             >> +++ b/common/autoconf/build-aux/config.sub    Wed Oct
>>             04 00:53:58
>>             >> 2017 +0200
>>             >> @@ -30,7 +30,7 @@
>>             >>    DIR=`dirname $0`
>>             >>
>>             >>    # First, filter out everything that doesn't begin
>>             with "aarch64-"
>>             >> -if ! echo $* | grep '^aarch64-' >/dev/null ; then
>>             >> +if ! echo $* | grep -e '^aarch64-' -e 'msys'
>>             >/dev/null ; then
>>             >>        . $DIR/autoconf-config.sub "$@"
>>             >>        # autoconf-config.sub exits, so we never reach
>>             here, but just in
>>             >>        # case we do:
>>             >> @@ -38,13 +38,17 @@
>>             >>    fi
>>             >>
>>             >>    while test $# -gt 0 ; do
>>             >> -    case $1 in
>>             >> +    case $1 in
>>             >>            -- )   # Stop option processing
>>             >>                shift; break ;;
>>             >>            aarch64-* )
>>             >>                config=`echo $1 | sed 's/^aarch64-/arm-/'`
>>             >>                sub_args="$sub_args $config"
>>             >>                shift; ;;
>>             >> +        *-msys )
>>             >> +            config=`echo $1 | sed 's/msys/mingw32/'`
>>             >> +            sub_args="$sub_args $config"
>>             >> +            shift; ;;
>>             >>            - )    # Use stdin as input.
>>             >>                sub_args="$sub_args $1"
>>             >>                shift; break ;;
>>             >> diff -r a08cbfc0e4ec common/autoconf/spec.gmk.in
>>             >> --- a/common/autoconf/spec.gmk.in    Thu Aug 03
>>             18:56:56 2017 +0000
>>             >> +++ b/common/autoconf/spec.gmk.in    Wed Oct 04
>>             00:53:58 2017 +0200
>>             >> @@ -120,6 +120,13 @@
>>             >>      # On Windows, the Visual Studio toolchain needs
>>             the PATH to be
>>             >> adjusted
>>             >>      # to include Visual Studio tools (this needs to
>>             be in cygwin/msys
>>             >> style).
>>             >>      export PATH:=@VS_PATH@
>>             >> +
>>             >> +endif
>>             >> +
>>             >> +ifeq ($(OPENJDK_TARGET_OS_ENV), windows.msys)
>>             >> +  # On msys2, prohibit msys path conversion from
>>             trying to be
>>             >> +  # "intelligent", and rely on fixpath instead.
>>             >> +  export MSYS2_ARG_CONV_EXCL:=*
>>             >>    endif
>>             >>
>>             >>    SYSROOT_CFLAGS := @SYSROOT_CFLAGS@
>>             >>
>>             >> /Magnus
>>             >>
>>             >> On 2017-10-03 22:34, Magnus Ihse Bursie wrote:
>>             >>> I gave msys2 a shot some time ago, but it ended up
>>             too much trouble.
>>             >>> I'll share some of my notes from that attempt, for
>>             what it's worth.
>>             >>>
>>             >>> To install package X/Y, run "pacman -S X/Y". Missing
>>             tools and
>>             >>> packages where to find them:
>>             >>> cmp: msys/diffutils
>>             >>> tar: msys/tar
>>             >>> make: msys/make
>>             >>> unzip: msys/unzip
>>             >>> zip: msys/zip
>>             >>>
>>             >>> config.sub reports msys as "x86_64-pc-mingw32" but
>>             msys2 as
>>             >>> "x86_64-pc-msys". This patch adds postprocessing in
>>             "our" config.sub
>>             >>> to report msys2 similar to msys. (Opinions, including
>>             my own :-) may
>>             >>> vary if this really is the best way..)
>>             >>>
>>             >>> diff -r b88023f46daa common/autoconf/build-aux/config.sub
>>             >>> --- a/common/autoconf/build-aux/config.sub      Fri
>>             Jan 27 10:15:41
>>             >>> 2017 +0100
>>             >>> +++ b/common/autoconf/build-aux/config.sub      Fri
>>             Feb 03 05:00:25
>>             >>> 2017 -0700
>>             >>> @@ -30,7 +30,7 @@
>>             >>>   DIR=`dirname $0`
>>             >>>
>>             >>>   # First, filter out everything that doesn't begin
>>             with "aarch64-"
>>             >>> -if ! echo $* | grep '^aarch64-' >/dev/null ; then
>>             >>> +if ! echo $* | grep -e '^aarch64-' -e 'msys'
>>             >/dev/null ; then
>>             >>>       . $DIR/autoconf-config.sub "$@"
>>             >>>       # autoconf-config.sub exits, so we never reach
>>             here, but just in
>>             >>>       # case we do:
>>             >>> @@ -45,6 +45,10 @@
>>             >>>               config=`echo $1 | sed 's/^aarch64-/arm-/'`
>>             >>>               sub_args="$sub_args $config"
>>             >>>               shift; ;;
>>             >>> +        *-msys )
>>             >>> +            config=`echo $1 | sed 's/msys/mingw32/'`
>>             >>> +            sub_args="$sub_args $config"
>>             >>> +            shift; ;;
>>             >>>           - )    # Use stdin as input.
>>             >>>               sub_args="$sub_args $1"
>>             >>>               shift; break ;;
>>             >>>
>>             >>> If I remember correctly, this got me past the
>>             configure stage at the
>>             >>> time.
>>             >>>
>>             >>> I don't think it's very hard to get it to work on
>>             msys2, I just ran
>>             >>> into one snag too many and didn't think msys2 would
>>             be used by anyone.
>>             >>>
>>             >>> /Magnus
>>             >>>
>>             >>> On 2017-10-03 17:20, Peter Budai wrote:
>>             >>>> Hello,
>>             >>>>
>>             >>>> According to
>>             >>>>
>>             http://hg.openjdk.java.net/jdk9/jdk9/file/a08cbfc0e4ec/common/doc/building.html
>>
>>             >>>>
>>             >>>> “msys2 and the new Windows Subsystem for Linux (WSL)
>>             would likely be
>>             >>>> possible to support in a future version but that
>>             would require a
>>             >>>> community effort to implement”
>>             >>>>
>>             >>>> I’d like to help making the OpenJDK 9 build working
>>             on msys2. What is
>>             >>>> the best way to move forward? Is there a similar
>>             effort in progress?
>>             >>>>
>>             >>>> Thank you and best regards,
>>             >>>>
>>             >>>> Peter
>>             >>>>
>>             >>>>
>>             >
>>




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