On Fri, Mar 4, 2011 at 7:52 PM, Don Ward <[email protected]> wrote:
> Due mainly to circumstances beyond my control, it is now possible to build > the volk library on Cygwin :-). Previously, there was no support for C99 > complex data types in the Cygwin library, but this was fixed by the release > of Cygwin 1.7.8-1 this past Tuesday. > > The remaining issues can be addressed by patches or workarounds: > > (1) configure fails while testing for -lboost_unit_test_framework because > of the presence of "-Wl,--enable-runtime-pseudo-reloc" in LDFLAGS. I'm not > sure why it is a problem, but I don't think these flags are needed at all in > this situation. > > (2) C++ libraries are not found because > volk/config/gcc_version_workaround.m4 specifies -nostdinc++ without knowing > where to find the libraries on Cygwin. My suggestion is to exempt Cygwin > from the action of gcc_version_workaround.m4. > > Changes to fix both of these (for Cygwin, anyway) are in the attached patch > file. > > (3) volk_16i_x4_quad_max_star_16i_a16.h triggers an internal compiler error > in the Cygwin gcc 3.4.4-999. One workaround is to remove "-O2" from the > Makefile. (An obvious suggestion is to use a newer compiler, but the last > time I tried it Cygwin gcc 4.x couldn't handle the exceptions generated > while looking for a working circular buffer strategy. I will check again > from time to time to see if the latest compiler works.) > > The bottom line is that we can now build volk (and the GNU Radio 'next' > branch) on Cygwin. > > -- Don W. > Excellent, Don, thanks! Tom
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