[Bf-blender-cvs] [82bd020a304] master: CMake: suppress GCC warnings stringop-overread & stringop-overflow

[Campbell Barton]

Commit: 82bd020a3047d43817c06b5d012e52eca0bfd298
Author: Campbell Barton
Date:   Sun Jan 15 23:29:02 2023 +1100
Branches: master
https://developer.blender.org/rB82bd020a3047d43817c06b5d012e52eca0bfd298

CMake: suppress GCC warnings stringop-overread & stringop-overflow

As noted in comments, there are a lot of false positives which can't
be conveniently suppressed. Many of these warnings were caused by
`float x, y, z` being passed as `float[3]` using a pointer to `x`.

===================================================================

M	CMakeLists.txt

===================================================================

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9dfb962a57e..0b2f4eec61a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1427,6 +1427,9 @@ if(CMAKE_COMPILER_IS_GNUCC)
   add_check_c_compiler_flag(C_WARNINGS C_WARN_TYPE_LIMITS -Wtype-limits)
   add_check_c_compiler_flag(C_WARNINGS C_WARN_FORMAT_SIGN -Wformat-signedness)
   add_check_c_compiler_flag(C_WARNINGS C_WARN_RESTRICT -Wrestrict)
+  # Useful but too many false positives and inconvenient to suppress each occurrence.
+  add_check_c_compiler_flag(C_WARNINGS C_WARN_NO_STRINGOP_OVERREAD -Wno-stringop-overread)
+  add_check_c_compiler_flag(C_WARNINGS C_WARN_NO_STRINGOP_OVERFLOW -Wno-stringop-overflow)
 
   # C-only.
   add_check_c_compiler_flag(C_WARNINGS C_WARN_NO_NULL -Wnonnull)
@@ -1466,6 +1469,9 @@ if(CMAKE_COMPILER_IS_GNUCC)
   add_check_cxx_compiler_flag(CXX_WARNINGS CXX_WARN_RESTRICT -Wrestrict)
   add_check_cxx_compiler_flag(CXX_WARNINGS CXX_WARN_NO_SUGGEST_OVERRIDE  -Wno-suggest-override)
   add_check_cxx_compiler_flag(CXX_WARNINGS CXX_WARN_UNINITIALIZED -Wuninitialized)
+  # Useful but too many false positives and inconvenient to suppress each occurrence.
+  add_check_cxx_compiler_flag(CXX_WARNINGS CXX_WARN_NO_STRINGOP_OVERREAD -Wno-stringop-overread)
+  add_check_cxx_compiler_flag(CXX_WARNINGS CXX_WARN_NO_STRINGOP_OVERFLOW -Wno-stringop-overflow)
 
   # causes too many warnings
   if(NOT APPLE)