[Patch-gnuradio] patches for 3.3git on MinGW/MSYS

[Don Ward]

Attached are a series of patches to make 3.3git build on MinGW/MSYS.  With 
these patches the latest 3.3git master builds and passes make check on 
MinGW/MSYS (apart from a few issues related to 3rd-party packages).

The fixes are:

(1) Add a .gitattributes file to prevent LF->CRLF conversion of certain 
files when cloning on a Windows system (other than Cygwin).  In general, any 
files that required svn:eol-style=lf should be included here.  The only ones 
I have found so far that need it are *.m4, *.ac, and *.scm.  Also, update 
.gitignore to not ignore .gitattributes.

(2) Use gruel::mutex instead of pthread_mutex in gr_histo_sink_f.{h,cc}. 
This fixes ticket #409. This fix builds and passes make check on MinGW/MSYS, 
but has not been tested otherwise.

(3) Make gruel depend on presence of guile. This code was modeled after the 
check in grc_mblock.m4. It builds ok when guile is present but has not been 
tested otherwise.

(4a) #include <unistd.h> in config.h before using usleep (needed on 
MinGW/MSYS).

(4b) Add "-shrext .pyd" to PYTHON_LDFLAGS for Python 2.5 (MinGW/MSYS only; 
to use .pyd instead of .dll for Python extensions).

(4c) Disable building of gr-msdd6000 when required #include files are 
missing. I tried to output a message saying why it was excluded, but the 
message printed four times, once for each missing file. A better solution 
would be to make msdd6000 work on Windows (like udp_sink?); I could do this 
but have no way to test it.

(4d) Make the building of posix_memalign.cc dependent on MD_CPU_powerpc 
(since the only code that uses it is also for powerpc). Fixes ticket #373. 
This needs to be tested on powerpc.  (armv7 also uses posix_memalign, but 
only aligns on sizeof(float).)  A more general solution (in my opinion) 
would be make a gr_aligned_malloc() and gr_aligned_free() which could be 
aliased to posix_memalign() and free() (or other system-dependent functions) 
on machines that have them and provide fallback functions based on malloc() 
(or options used in our posix_memalign.cc) for machines that don't.

(5) #include "config.h" in usrp/host/lib/db_wbxng.cc for timespec, 
nanosleep, etc. (required for MinGW/MSYS).

Let me know if you think it would be worthwhile for me to tackle one of the 
alternative solutions to (4c) and/or (4d).

-- Don W.

4.patch
Description: Binary data

5.patch
Description: Binary data

1.patch
Description: Binary data

2.patch
Description: Binary data

3.patch
Description: Binary data