llvm.org.eclass: Restore llvm_are_manpages_built

Closes: https://bugs.gentoo.org/851240
Signed-off-by: Michał Górny <[email protected]>

eclass/llvm.org.eclass

@@ -401,12 +401,20 @@ llvm_manpage_dist_available() {
  ver_test "${PV}" -le "${_LLVM_NEWEST_MANPAGE_RELEASE}"
 }
 
+# @FUNCTION: llvm_are_manpages_built
+# @DESCRIPTION:
+# Return true (0) if manpages are going to be built from source,
+# false (1) if preinstalled manpages will be used.
+llvm_are_manpages_built() {
+ use doc || ! llvm_manpage_dist_available
+}
+
 # @FUNCTION: llvm_install_manpages
 # @DESCRIPTION:
 # Install pregenerated manpages if available. No-op otherwise.
 llvm_install_manpages() {
  # install pre-generated manpages
- if ! use doc && llvm_manpage_dist_available; then
+ if ! llvm_are_manpages_built; then
  # (doman does not support custom paths)
  insinto "/usr/lib/llvm/${SLOT}/share/man/man1"
  doins "${WORKDIR}/llvm-${PV}-manpages/${LLVM_COMPONENTS[0]}"/*.1