Bug 1460020: Filter out PGO flags from cargo's LDFLAGS. r=froydnj

config/rules.mk

@@ -925,8 +925,9 @@ ifndef MOZ_TSAN
 # Cargo needs the same linker flags as the C/C++ compiler,
 # but not the final libraries. Filter those out because they
 # cause problems on macOS 10.7; see bug 1365993 for details.
+# Also, we don't want to pass PGO flags until cargo supports them.
 target_cargo_env_vars := \
-	MOZ_CARGO_WRAP_LDFLAGS="$(filter-out -framework Cocoa -lobjc AudioToolbox ExceptionHandling,$(LDFLAGS))" \
+	MOZ_CARGO_WRAP_LDFLAGS="$(filter-out -framework Cocoa -lobjc AudioToolbox ExceptionHandling -fprofile-%,$(LDFLAGS))" \
 	MOZ_CARGO_WRAP_LD="$(CC)" \
 	$(cargo_linker_env_var)=$(topsrcdir)/build/cargo-linker
 endif # MOZ_TSAN