Support gcc/6 on SLE_15

mpcdf_common.py

@@ -65,11 +65,22 @@ def dist_prjconf_tags(distribution):
         ExpandFlags: module:python36-3.6
         """).strip()
 
+    sles15_prjconf_tags = textwrap.dedent(
+        """
+        %if "%{_repository}" == "gcc_6" || "%{_repository}" == "gcc_7"
+        # gcc6/7 cannot deal with "-fstack-clash-protection" that has been added in SLE15 by default
+        Optflags: * -fmessage-length=0 -grecord-gcc-switches -O2 -Wall -D_FORTIFY_SOURCE=2 -fstack-protector-strong -funwind-tables -fasynchronous-unwind-tables
+        %endif
+        """
+    ).strip()
+
     res = ""
     if "CentOS" in distribution:
         res += centos_prjconf_tags
     if "CentOS_8" in distribution:
         res += "\n" + centos8_prjconf_tags
+    if "SLE_15" in distribution:
+        res += sles15_prjconf_tags
 
     return res
 
@@ -604,7 +615,7 @@ def mpcdf_setup_subproject(api_url, project, distribution, microarchitecture,
 
     prjconf_ours.append("Constraint: hostlabel {0}".format(microarchitecture))
     prjconf_ours.append("Preinstall: mpcdf_{0}_directory".format(microarchitecture))
-    prjconf_ours.append("PublishFilter: ^mpcdf_.*$")
+    prjconf_ours.append("")
 
     extra_tags = dist_prjconf_tags(distribution)
     if extra_tags: