Fix previous commit on gcc 9 and 10

src/Makefile

@@ -22,6 +22,9 @@ FLAGS += -Wall -Wno-strict-aliasing -fno-omit-frame-pointer -fvisibility=hidden
 		 -Wno-comment -Wpointer-arith -Wundef
 ifeq ($(USEGCC),1) # GCC bug #25509 (void)__attribute__((warn_unused_result))
 FLAGS += -Wno-unused-result
+# GCC is throwing warnings like `warning: 'int __builtin_memcmp_eq(const void*, const void*, long unsigned int)' specified bound 18446744073709551615 exceeds maximum object size 9223372036854775807` in llvm's StringRef.h == seemingly because it doesn't realise the size can't be 0.
+FLAGS += -Wno-stringop-overflow
+FLAGS += -Wno-stringop-overread
 endif
 JCFLAGS += -Wold-style-definition -Wstrict-prototypes -Wc++-compat
 

src/debuginfo.cpp

@@ -42,13 +42,6 @@ using namespace llvm;
 #include "julia_assert.h"
 #include "debug-registry.h"
 
-#ifdef _COMPILER_GCC_
-// GCC is throwing warnings like `warning: 'int __builtin_memcmp_eq(const void*, const void*, long unsigned int)' specified bound 18446744073709551615 exceeds maximum object size 9223372036854775807` in llvm's StringRef.h == seemingly because it doesn't realise the size can't be 0.
-#pragma GCC diagnostic push
-#pragma GCC diagnostic ignored "-Wstringop-overread"
-#pragma GCC diagnostic ignored "-Wstringop-overflow"
-#endif
-
 static JITDebugInfoRegistry *DebugRegistry = new JITDebugInfoRegistry;
 
 static JITDebugInfoRegistry &getJITDebugRegistry() JL_NOTSAFEPOINT {
@@ -1651,7 +1644,3 @@ uint64_t jl_getUnwindInfo_impl(uint64_t dwAddr)
     jl_unlock_profile();
     return ipstart;
 }
-
-#ifdef _COMPILER_GCC_
-#pragma GCC diagnostic pop
-#endif