app-crypt/gpgme: fail pretend if workdir is too long

Bug: https://bugs.gentoo.org/643696
Package-Manager: Portage-2.3.13, Repoman-2.3.3

app-crypt/gpgme/gpgme-1.10.0.ebuild

@@ -44,10 +44,26 @@ do_python() {
  fi
 }
 
+pkg_pretend() {
+ local MAX_WORKDIR=66
+
+ [[ "${#WORKDIR}" -le "${MAX_WORKDIR}" ]] ||
+ die "Cannot build package as WORKDIR '${WORKDIR}' is longer than ${MAX_WORKDIR} which will fail build"
+}
+
 pkg_setup() {
  addpredict /run/user/$(id -u)/gnupg
 }
 
+src_prepare() {
+ default
+
+ # Make best effort to allow longer PORTAGE_TMPDIR
+ # as usock limitation fails build/tests
+ ln -s "${P}" "${WORKDIR}/b"
+ S="${WORKDIR}/b"
+}
+
 src_configure() {
  local languages=()
  use common-lisp && languages+=( "cl" )