cryptic compile failure when libogg is too old
I think this should have it's bugzilla entry, since it is a real problem for
inexperienced users.
Problem: If a user tries to compile libvorbis 1.0 with libogg < 1.0 using the
good old './configure; make' formula the compile fails with the cryptic
../lib/.libs/libvorbis.a(mapping0.o): In function `mapping0_forward':
mapping0.o(.text+0xd91): undefined reference to `oggpack_writealign'
This can be fixed by uncommenting the line
dnl AC_CHECK_LIB(ogg, oggpack_writealign, , AC_MSG_ERROR(Ogg >= 1.0 required !))
in configure.in