Need hint on building jruby.exe using MinGW

Ruby JRuby
1

I need a pointer on how to build jruby.exe from source using MinGW on
Windows 7 please.

The README says make should work if MinGW is installed. I installed
MinGW succesfully today using mingw-get-setup.exe and can compile sample
programs fine; g++ (GCC) is 4.8.1. However, the following two build
techniques were not successful:

Option 1: Using a MinGW msys.bat environment “/” lives in C:\MinGW, and
so if I copy
~\jruby-1.7.10 into my $HOME and run make from
~\jruby-launcher-1.0.19-java, the compilation fails with an error on an
include in winbase.h "error: previous declaration ‘BOOL
DllMain(HINSTANCE, DWORD, LPVOID)’ here… on DllMain.

Option 2: If I put C:\MINGW\BIN in my $PATH and run it from a Windows
cmd prompt in the
~\jruby-1.7.10\lib\ruby\gems\shared\gems\jruby-launcher-1.0.19-java
directory there is no make recognized of course, but if I do a “g++
jruby.cpp -o jruby.exe” then the compiler can’t find jni.h (which is in
my C:\Program Files (x86)\Java\jdk1.7.0_51\include directory.

Any pointers on how to accomplish this compilation from source are
appreciated!

Thanks,
rcs

2

I believe I was the last person to build this for our native installer
and
I remember having to try many many things before I got it to work. I
will
try and see what I specifically have installed on my windows box.
Getting
the proper compiler chain setup was nasty is all I remember. This
afternoon I am looking at some Windows bugs so I will try and build
native
launcher to make sure something else has not changed.

-Tom

PS - Someone should rewrite our native launcher…it is pretty horrible
and
I don’t say that lightly.

3

Thomas E Enebo wrote in post #1137373:

I believe I was the last person to build this for our native
installer and I remember having to try many many things before
I got it to work. I will try and see what I specifically have
installed on my windows box. Getting the proper compiler chain
setup was nasty is all I remember. This afternoon I am looking
at some Windows bugs so I will try and build native launcher to
make sure something else has not changed.

-Tom

PS - Someone should rewrite our native launcher…it is pretty
horrible and I don’t say that lightly.

Thank you very much for your help! I just so happened to
rebuild jruby.exe successfully on Windows 7 within the hour as
follows. I know this process is a hack from a development
environment standpoint, but these steps produced a proper
compiler chain that results in a working Windows executable:

(1) Install MinGW using mingw-get-setup.exe from
MinGW - Minimalist GNU for Windows download | SourceForge.net

(2) Copy the whole jruby-1.7.10 tree into the $HOME of an MinGW
msys.bat shell environment

(3) cd to
~jruby-1.7.10\lib\ruby\gems\shared\gems\jruby-launcher-1.0.19-java

(4) edit the Makefile to comment out the following lines near the top:

#ifeq (true,$(shell test -x $(BINDIR)/jruby && echo true))
#RAKE=$(BINDIR)/jruby -S rake
#else
#RAKE=rake
#endif

(5) Execute “make jruby.exe” from the msys.bat shell, which yields
the compiler string:

g++ jrubyexe.cpp nbexecloader.h utilsfuncs.cpp utilsfuncswin.cpp
jruby.res -s -o jruby.exe -static

...as well as a working .exe file.

Therefore the proper build chain was documented in a sensible place
and it is entirely my bad for not finding this sooner (apologies).

When you can spare a moment I am also interested in pointers to help
me make better contributions in the future:

(a) properly setting up a JRuby Windows build environment (like yours)
(b) any useful readings or advice that would facilitate my understanding
of the jruby code base
(c) what JVMs are being used to test JRuby at the moment?

Again, thank you for your support and all of your great work!

Regards,
rcs

4

On Thu, Feb 20, 2014 at 1:38 PM, Richard S. [email protected]
wrote:

http://sourceforge.net/projects/mingw/

(2) Copy the whole jruby-1.7.10 tree into the $HOME of an MinGW
msys.bat shell environment

I never had to do this so I am wondering what I did to make it find the
needed files in there…

#endif

I think this might have worked for me since I had an env which did have
a
valid jruby install to build the newer launcher. You might have also
did
somehting like:

RAKE=path/jruby.bat -S rake make jruby.exe

Or something along those lines.

When you can spare a moment I am also interested in pointers to help
me make better contributions in the future:

(a) properly setting up a JRuby Windows build environment (like yours)

I just clone to windows and generally I only need to do mvn to compile
it.

(b) any useful readings or advice that would facilitate my understanding
of the jruby code base

There are a few talks/presos on the net (jruby hacking guide as a search
phrase) but we have plans to make a more focused getting started guide
soon.

(c) what JVMs are being used to test JRuby at the moment?

Travis CI - Test and Deploy with Confidence

Notice currently we do not have any windows builds. I ran some tests
today
and most of the errors are poor tests not accounting for Windows
differences but not all. So a windows user developing JRuby would be
welcome…