replace %ghc_set_cflags with simplified %ghc_set_gcc_flags

tested in ghc.spec in ghc:8.4 module

ghc-rpm-macros.spec

@@ -10,7 +10,7 @@
 #%%global without_hscolour 1
 
 Name:           ghc-rpm-macros
-Version:        1.9.2
+Version:        1.9.3
 Release:        1%{?dist}
 Summary:        RPM macros for building Haskell packages for GHC
 
@@ -170,6 +170,9 @@ EOF
 
 
 %changelog
+* Fri Oct  5 2018 Jens Petersen <petersen@redhat.com> - 1.9.3-1
+- replace ghc_set_cflags with simplified ghc_set_gcc_flags
+
 * Tue Jul 31 2018 Jens Petersen <petersen@redhat.com> - 1.9.2-1
 - inject a Setup.hs if none shipped
 

macros.ghc

@@ -9,14 +9,10 @@ LANG=en_US.utf8\
 # compiler version
 %ghc_version %{!?ghc_version_override:%(ghc --numeric-version)}%{?ghc_version_override}
 
-%ghc_set_cflags\
+
-# -Wunused-label is extremely noisy\
+%ghc_set_gcc_flags\
-%ifarch aarch64 s390x\
+export CFLAGS="${CFLAGS:-%optflags}"\
-CFLAGS="${CFLAGS:-$(echo %optflags | sed -e 's/-Wall //' -e 's/-Werror=format-security //')}"\
+export LDFLAGS="${LDFLAGS:-%{?__global_ldflags}}"\
-%else\
-CFLAGS="${CFLAGS:-%optflags}"\
-%endif\
-export CFLAGS\
 %{nil}
 
 # configure