Removing some warnings from GSdx and pcsx2 because gcc 8 spams them mercilessly. They should probably be fixed properly, but in the meantime, this'll prevent them from masking other compiler warnings.

pcsx2/CMakeLists.txt

@@ -18,6 +18,9 @@ set(CommonFlags
     -Wstrict-aliasing # Allow to track strict aliasing issue.
     -Wno-char-subscripts # only impact svu which is deprecated
     -Wno-missing-braces
+    # Largely turning off because LegacyPluginAPI_Common in Plugins.h spams really badly in gcc 8 due to the memzero initialization.
+    # Should probably be fixed properly, but for now this should work.
+    -Wno-class-memaccess 
     #-Wno-ignored-attributes # don't remember why I put here but it is pure C option, therefore it complains for nothings on cpp files
     -DWX_PRECOMP
 	)

plugins/GSdx/CMakeLists.txt

@@ -14,6 +14,10 @@ set(CommonFlags
     -Wno-unknown-pragmas
     -Wno-parentheses
     -Wunused-variable # __dummy variable need to be investigated
+    # The next two need to be looked at, but spam really badly in gcc 8.
+    # Largely class alignment in GSDevice.h and memcpy in GSVector*.h.
+    -Wno-class-memaccess 
+    -Wno-packed-not-aligned
     )
 
 if(USE_ICC)

plugins/GSdx_legacy/CMakeLists.txt

@@ -15,6 +15,10 @@ set(CommonFlags
     -Wno-unknown-pragmas
     -Wno-parentheses
     -Wunused-variable # __dummy variable need to be investigated
+    # The next two need to be looked at, but spam really badly in gcc 8.
+    # Largely class alignment in GSDevice.h and memcpy in GSVector*.h.
+    -Wno-class-memaccess 
+    -Wno-packed-not-aligned
     )
 
 set(GSdxFinalFlags ${CommonFlags})