[PATCH] D155857: [clang] fix nonnull warnings during build

[Farid Zakaria via Phabricator via cfe-commits]

fzakaria updated this revision to Diff 543244.
fzakaria added a comment.

The previous CMake variable wasn't working.

Changed it to the pattern I see in the codebase.
Confirmed it via `ninja` command and grepping.

  ❯ rg --color=always no-nonnull build.ninja | head -n 1
    FLAGS = -fPIC -fno-semantic-interposition -fvisibility-inlines-hidden -Werror=date-time -fno-lifetime-dse -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wno-missing-field-initializers -pedantic -Wno-long-long -Wimplicit-fallthrough -Wno-maybe-uninitialized -Wno-nonnull -Wno-class-memaccess -Wno-redundant-move -Wno-pessimizing-move -Wno-noexcept-type -Wdelete-non-virtual-dtor -Wsuggest-override -Wno-comment -Wno-misleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -ffunction-sections -fdata-sections -O2 -g -DNDEBUG  -fno-exceptions -funwind-tables -fno-rtti -gsplit-dwarf -std=c++17


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D155857/new/

https://reviews.llvm.org/D155857

Files:
  llvm/cmake/modules/HandleLLVMOptions.cmake


Index: llvm/cmake/modules/HandleLLVMOptions.cmake
===================================================================
--- llvm/cmake/modules/HandleLLVMOptions.cmake
+++ llvm/cmake/modules/HandleLLVMOptions.cmake
@@ -770,6 +770,11 @@
   append_if(USE_NO_UNINITIALIZED "-Wno-uninitialized" CMAKE_CXX_FLAGS)
   append_if(USE_NO_MAYBE_UNINITIALIZED "-Wno-maybe-uninitialized" CMAKE_CXX_FLAGS)
 
+  # Disable -Wnonnull forthis GCC warning as it is emitting a lot of false positives.
+  if (CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
+    append("-Wno-nonnull" CMAKE_CXX_FLAGS)
+  endif()
+
   # Disable -Wclass-memaccess, a C++-only warning from GCC 8 that fires on
   # LLVM's ADT classes.
   check_cxx_compiler_flag("-Wclass-memaccess" CXX_SUPPORTS_CLASS_MEMACCESS_FLAG)


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