build: disable bogus warnings for GCC 12

The array bounds and string overread check on GCC 12 report a dozen of
false positives that result in VPP build failures on ubuntu 22.04.
Work around this build issue by unconditionally disabling these two
warnings if C compiler is GCC 12 or newer version.

Type: fix
Signed-off-by: Jieqiang Wang <jieqiang.wang@arm.com>
Change-Id: I999e847bb625ebdf3ef5f11b11598c553f306670

diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index b6d48f5..4ef4259 100644 (file)
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -59,6 +59,14 @@ elseif(CMAKE_C_COMPILER_ID STREQUAL "GNU")
   if (CMAKE_C_COMPILER_VERSION VERSION_GREATER_EQUAL GCC_STRING_OVERFLOW_WARNING_DISABLE_VERSION)
     add_compile_options(-Wno-stringop-overflow)
   endif()
+  set(GCC_STRING_OVERREAD_WARNING_DISABLE_VERSION 12.0.0)
+  if (CMAKE_C_COMPILER_VERSION VERSION_GREATER_EQUAL GCC_STRING_OVERREAD_WARNING_DISABLE_VERSION)
+    add_compile_options(-Wno-stringop-overread)
+  endif()
+  set(GCC_ARRAY_BOUNDS_WARNING_DISABLE_VERSION 12.0.0)
+  if (CMAKE_C_COMPILER_VERSION VERSION_GREATER_EQUAL GCC_ARRAY_BOUNDS_WARNING_DISABLE_VERSION)
+    add_compile_options(-Wno-array-bounds)
+  endif()
 else()
   message(WARNING "WARNING: Unsupported C compiler `${CMAKE_C_COMPILER_ID}` is used")
   set (PRINT_MIN_C_COMPILER_VER TRUE)