only pass CFLAGS and LDFLAGS to ghc if set

ghc-rpm-macros.spec

@@ -11,7 +11,7 @@
 
 Name:           ghc-rpm-macros
 Version:        1.6.9
-Release:        5%{?dist}
+Release:        6%{?dist}
 Summary:        RPM macros for building Haskell packages for GHC
 
 License:        GPLv3+
@@ -137,6 +137,9 @@ EOF
 
 
 %changelog
+* Mon Oct 17 2016 Jens Petersen <petersen@redhat.com> - 1.6.9-6
+- only pass CFLAGS and LDFLAGS to ghc if set
+
 * Mon Oct 17 2016 Jens Petersen <petersen@redhat.com> - 1.6.9-5
 - for aarch64 do not set CFLAGS and LDFLAGS
 

macros.ghc

@@ -27,7 +27,7 @@ fi
 CFLAGS="${CFLAGS:-%optflags}"; export CFLAGS\
 LDFLAGS="${LDFLAGS:-%{?__global_ldflags}}"; export LDFLAGS\
 %endif\
-%cabal configure %{?cabal_verbose} --prefix=%{_prefix} --libdir=%{_libdir} --docdir=%{_defaultlicensedir}/%{name} --libsubdir='$compiler/$pkgkey' --datasubdir='$pkgid' --ghc %{!?ghc_without_dynamic:--enable-executable-dynamic} %{?with_tests:--enable-tests} --ghc-options="$(echo ' '$CFLAGS | sed -e 's/ / -optc/g') $(echo ' '$LDFLAGS | sed -e 's/ / -optl/g')" %{?cabal_configure_options} $cabal_configure_extra_options
+%cabal configure %{?cabal_verbose} --prefix=%{_prefix} --libdir=%{_libdir} --docdir=%{_defaultlicensedir}/%{name} --libsubdir='$compiler/$pkgkey' --datasubdir='$pkgid' --ghc %{!?ghc_without_dynamic:--enable-executable-dynamic} %{?with_tests:--enable-tests} --ghc-options="${CFLAGS:+$(echo ' '$CFLAGS | sed -e 's/ / -optc/g')} ${LDFLAGS:+$(echo ' '$LDFLAGS | sed -e 's/ / -optl/g')}" %{?cabal_configure_options} $cabal_configure_extra_options
 
 # install
 %cabal_install %cabal copy %{?cabal_verbose} %{!?cabal_verbose:-v} --destdir=%{buildroot}