[mythtv] [RFC v2] New Win32 build script

[Dan Wilson]

On 01/18/2011 01:29 PM, Lawrence Rust wrote:
>
> Coincidentally, I have just put the finishing touches to this final
> release which will cross compile, compile natively on Windows using Msys
> or produce a native build on Linux (Intel and PowerPC) and maybe MacOSX
> too.  You can find it here:
>
> http://www.softsystem.co.uk/download/mythtv/mythbuild-110118.zip
>

It still doesn't work for me.  I am running Fedora 14 64-bit:
> Usage:
>
> $ unzip mythbuild-110118.zip&&  chmod +x mythbuild.sh
>
> NB the patches too are now downloaded at runtime from the web.
>
> # For general info on the script
> $ ./mythbuild -h
>
> # To cross-compile latest MythTV master branch with debugging:
> $ ./mythbuild -b master -d
>
> # To cross-compile MythTV fixes/0.24 branch:
> $ ./mythbuild -b fixes/0.24

I had to use ./mythbuild.sh.  Is there a preferred/required shell one 
should be using when invoking the script?  (I generally use tcsh, btw).

I started in a clean subdirectory (mythbuild.sh was the only file in the 
directory, there were no subdirectories):

./mythbuild.sh -b fixes/0.24

*********************************************************************
Building MythTV branch 'fixes/0.24' (release) for Windows
*********************************************************************

Press [Return] to continue or [Control-C] to abort:

Target changed.  Reconfiguring all packages
touch: cannot touch 
`/home/dwilson/mythbuildw32/mythbuild/target-Windows': No such file or 
directory


So I created the mythbuild subdirectory, and that got us further:

./mythbuild.sh -b fixes/0.24

*********************************************************************
Building MythTV branch 'fixes/0.24' (release) for Windows
*********************************************************************

Press [Return] to continue or [Control-C] to abort:

Target changed.  Reconfiguring all packages

....

*********************************************************************
Building unzip60...
*********************************************************************

Extracting unzip60.zip ...
Applying patch unzip60/SFXWiz32.diff
patching file process.c
patching file windll/guisfx/sfxwiz.c
+ make -j 5 CC=i686-pc-mingw32-cc AR=i686-pc-mingw32-ar 
RC=i686-pc-mingw32-windres LOCAL_UNZIP=-DCHEAP_SFX_AUTORUN guisfx
i686-pc-mingw32-cc -c -DWIN32 -DFORCE_WIN32_OVER_UNIX  -Wall  
-DIZ_CRCOPTIM_UNFOLDTBL -DASM_CRC -DCHEAP_SFX_AUTORUN -o sfxwiz.o  -Os 
-mcpu=pentiumpro -DSFX -I. windll/guisfx/sfxwiz.c
make: i686-pc-mingw32-cc: Command not found



i686-pc-mingw32-cc appears to be called i686-pc-mingw32-gcc on this 
system.  I changed the script by adding a 'g' and it ran until it got 
into the libxml2 make:

i686-pc-mingw32-gcc -DHAVE_CONFIG_H -I. -I./include -I./include  
-D_REENTRANT    -DWIN32  -g -O2 -pedantic -W -Wformat -Wunused 
-Wimplicit -Wreturn-type -Wswitch -Wcomment -Wtrigraphs -Wformat 
-Wchar-subscripts -Wuninitialized -Wparentheses -Wshadow -Wpointer-arith 
-Wcast-align -Wwrite-strings -Waggregate-return -Wstrict-prototypes 
-Wmissing-prototypes -Wnested-externs -Winline -Wredundant-decls -MT 
testC14N.o -MD -MP -MF .deps/testC14N.Tpo -c -o testC14N.o testC14N.c
testThreads.c: In function 'main':
testThreads.c:110:6: error: conversion to non-scalar type requested
make[2]: *** [testThreads.o] Error 1

The line in question is:    tid[i] = (pthread_t) -1;

which is seriously wrong code!

I looked at where tid[i] is used, and couldn't see why this line was 
required, plus I figured the build script wouldn't try to run 
testThreads, so I just commented out that line and continued.  Perhaps 
that needs to be added to the patch list?

Next problem:  libxml2 build dies due to failure to find needed include 
files. This eventually turned into a rat-hole that I couldn't get out of.
First missing include was bits/wordsize.h file.
A copy of that file is present in /usr/include/bits/wordsize.h, but the 
script/compiler isn't finding it. mingw32 doesn't seem to have one.
I moved a copy of /usr/include/bits/wordsize.h to 
mythbuild/libxml2-2.7.8/include/bits/wordsize.h.  Then I edited the 
copied file to force 32-bit word size, just in case.
I then got another missing include file "pyconfig-32.h".  Since this is 
a 64-bit system, /usr/include/python2.7 has pyconfig.h and 
pyconfig-64.h, but no pyconfig-32.h.
I installed python-2.7-8.fc14.1.i686 package, which got me pyconfig-32.h.
Next missing include was sys/select.h, which is present in 
/usr/include/sys.  I copied it to mythbuild/libxml2-2.7.8/include/sys.
/usr/i686-pc-mingw32/sys-root/mingw/include/sys directory exists, by the 
way, but select.h is not in it.
Next missing include was features.h, which is in /usr/include.  I copied 
it to mythbuild/libxml2-2.7.8/include.
Next it was missing another include file from /usr/include/sys.  At this 
point, I got impatient and just copied the entire contents of 
/usr/include/sys to mythbuild/libxml2-2.7.8/include/sys.
Next missing include was gnu/stubs.h.  While /usr/include/gnu/stubs.h 
exists, it was clear that it would also need gnu/stubs-32.h, which is 
only present in the i686 glibc-devel package.  So I installed 
glibc-devel-2.12.90-21.i686 package, then copied gnu subdirectory to 
mythbuild/libxml2-2.7.8/include/gnu.
Next missing include was bits/types.h.  I copied it. bits/typesizes.h 
was also missing, and needed, so I copied that as well.

And there were more - I won't bore you with them here further. It's 
clear that something is badly wrong with the libxml2 make script when 
trying to cross-compile on a 64-bit system for a 32-bit target. I don't 
see this as your problem, really - the libxml2 developers ought to 
support that better?

In the meantime, I was curious to see what would happen once I got past 
libxml2, so I kept copying and modifying files as needed.

Unfortunately, I hit a wall.

In file included from ../include/libxml/nanoftp.h:20:0,
                  from libxml_wrap.h:7,
                  from libxml2-py.c:7:
/usr/i686-pc-mingw32/sys-root/mingw/include/winsock2.h:64:3: error: 
conflicting types for 'fd_set'
../include/sys/select.h:78:5: note: previous declaration of 'fd_set' was 
here
/usr/i686-pc-mingw32/sys-root/mingw/include/winsock2.h:109:8: error: 
redefinition of 'struct timeval'
../include/bits/time.h:75:8: note: originally defined here

/usr/i686-pc-mingw32/sys-root/mingw/include/sys directory exists, by the 
way, but select.h is not in it.

There were more errors like this, but you see the nature of them here. I 
"could" go in and attempt to fix this by hand, but I've reached the end 
of my patience with libxml2. Any chance we can get libxml2 developers to 
fix the cross-compilation problems, I wonder?

In the meantime, I'm going to install fedora 14 32-bit into a virtual 
machine and try this process there.  I'll let you know in another post 
how it goes.

Thanks for all your hard work on this!

Dan.