Re: [Discuss-gnuradio] Build failure - caused by posix_memalign.cc - in trunk built under Cygwin

[Michael Dickens]

On Feb 17, 2009, at 8:48 AM, Prior-Jones, Michael R wrote:
> I'm trying to build the current trunk version of Gnuradio under  
> Cygwin on Windows XP. Make currently fails with
>
> posix_memalign.cc: In function `int posix_memalign(void**, size_t,  
> size_t)':
> posix_memalign.cc:86: error: `valloc' undeclared (first use this  
> function)
> posix_memalign.cc:86: error: (Each undeclared identifier is reported  
> only once for each function it appears in.)
>
> Have I missed something?

Hmmm.  We've tried to include headers in posix_memalign.cc which work  
with all OSs (OSX, Linux, Cygwin, ?MinGW?) for valloc ()).  According  
to the error the compiler was at line 86, which means that the macro  
HAVE_VALLOC was defined, which means that 'configure' found the valloc  
() function prototype somewhere -- but not in the header file(s)  
included in posix_memalign.cc thus far.

If you issue (in a Cygwin terminal) "grep -lr valloc /usr/include" do  
you get any files listed?  If so, what is it / are they?  Issuing this  
instruction on Ubuntu 8.10 results in:

/usr/include/malloc.h
/usr/include/stdlib.h

So hopefully Cygwin uses one of these Linux headers to define the  
valloc () function prototype.  stdlib.h is already included in  
posix_memalign.cc, so it's probably not in that header.  Maybe  
malloc.h?  We can easily put #if's around the #include to keep OSX  
from barfing. - MLD