lilly_libcxx.patch for building against libc++

[Jack Howarth]

   The attached patch, lilly_libcxx.patch, contains the changes which allow 
lilypond 2.17.95
to build against libc++ on Xcode 10.9 with the clang++ compiler. There is a 
glitch in the
configure/makefiles currently that requires that the user pass 
-DHAVE_STL_DATA_METHOD on
CXXFLAGS. The problem is odd as configure seems able to set...

/* define if you have stl data () method */
#define HAVE_STL_DATA_METHOD 1

in the top level config.hh but it doesn't seem to get passed down to 
flowers/include/std-vector.hh
when included in file-path.cc.
          Jack

lilly_libcxx.patch
Description: Text document