only add dynlib to filelist if found to allow for metapkg subpackage

eg base-noprelude subpackage of pandoc

ghc-rpm-macros.spec

@@ -10,7 +10,7 @@
 #%%global without_hscolour 1
 
 Name:           ghc-rpm-macros
-Version:        2.0.10
+Version:        2.0.11
 Release:        1%{?dist}
 Summary:        RPM macros for building Haskell packages for GHC
 
@@ -212,6 +212,10 @@ EOF
 
 
 %changelog
+* Wed Jun 24 2020 Jens Petersen <petersen@redhat.com> - 2.0.11-1
+- only add dynlib to file list if it exists
+  (this allows for metapkg subpackages)
+
 * Thu Jun 18 2020 Jens Petersen <petersen@redhat.com> - 2.0.10-1
 - cabal-tweak script now output errors to stderr
 

macros.ghc

@@ -81,7 +81,11 @@ echo "%%license %{pkgnamever}/$i" >> %{basepkg}.files\
 done\
 %endif\
 for i in %{buildroot}%{_ghcdynlibdir}/libHS%{pkgnamever}-*ghc%{ghc_version}.so; do\
+if [ -x "$i" ]; then\
 echo $i >> %{basepkg}.files\
+else\
+echo 'Warning: %{buildroot}%{_ghcdynlibdir}/libHS%{pkgnamever}-*ghc%{ghc_version}.so not found'\
+fi\
 done\
 pkgdir="%{ghclibdir}/%{pkgnamever}"\
 if [ -d "%{buildroot}${pkgdir}" ]; then\