autotools.eclass:
eqawarn "This package has a configure.in file which has long been deprecated.  Please"
eqawarn "Running '${1}' in ${EBUILD_PHASE_FUNC} phase"

chromium-2.eclass:
eqawarn "L10N warning: no .pak file for ${lang} (${lang}.pak not found)"
eqawarn "L10N warning: no ${lang} in LANGS"

distutils-r1.eclass:
eqawarn "Non-PEP517 builds are deprecated for ebuilds using plain distutils."
eqawarn "${build_backend} backend is deprecated.  Please see:"
eqawarn "Python extension modules (*$(get_modname)) found installed. Please set:"

ecm.eclass:
eqawarn "Build system was modified by ECM_TEST=forceoptional-recursive."

flag-o-matic.eclass:
eqawarn "Appending an empty argument to LIBS is invalid! Skipping."
eqawarn "Appending non-library to LIBS (${flag}); Other linker flags should be passed via LDFLAGS"

go-module.eclass:
eqawarn "This ebuild uses EGO_SUM which is deprecated"

gstreamer-meson.eclass:
eqawarn "QA: IUSE=orc is missing while plugin supports it"
eqawarn "QA: IUSE=orc is present while plugin does not support it"
eqawarn "QA: IUSE=introspection is missing while plugin supports it"
eqawarn "QA: IUSE=introspection is present while plugin does not support it"

haskell-cabal.eclass:
eqawarn "No Setup.lhs or Setup.hs found. Either add Setup.hs to package or call cabal-mksetup from ebuild"

java-pkg-simple.eclass:
eqawarn "Need at least JDK 9 to compile module-info.java in src_compile."

java-utils-2.eclass:
eqawarn "java-pkg_ensure-dep: ${dev_error}"
eqawarn "java-pkg_ensure-dep: ${dev_error}"

python-r1.eclass:
eqawarn "python_foreach_impl has been called directly while using distutils-r1."

python-utils-r1.eclass:
eqawarn "The directory ${fn} occludes package installed for ${EPYTHON}."
eqawarn "    ${l}"
eqawarn "For more information on occluded packages, please see:"

rpm.eclass:
eqawarn 'do not use ${DISTDIR} with rpm_unpack -- it is added for you'
eqawarn 'do not use full paths with rpm_unpack -- use ./ paths instead'

ruby-fakegem.eclass:
eqawarn "${CATEGORY}/${PF}: Unknown test recipe '${RUBY_FAKEGEM_RECIPE_TEST}' specified, using 'none'"
eqawarn "Generating generic fallback gemspec *without* dependencies"

ruby-ng.eclass:
eqawarn "RUBY_PATCHES is no longer supported, use PATCHES instead"
eqawarn "Missing test dependency dev-ruby/rspec"

toolchain.eclass:
eqawarn "Snapshot release with pre-generated info pages found!"

wxwidgets.eclass:
eqawarn "This package relies on the deprecated GTK 2 slot, which will go away soon (https://bugs.gentoo.org/618642)"