Bug#718640: lintian should warn about old style setting of CFLAGS (noopt)

[Matthias Klose <doko@debian.org>]

Package: lintian

Please add a warning for this obsolete use:

  ifneq (,$(findstring noopt,$(DEB_BUILD_OPTIONS)))
        CFLAGS += -O0
  else
        CFLAGS += -O2
  endif

and suggest using dpkg-buildflags.