Merge pull request #23991 from buyuer:4.x

Eliminating compilation warnings when using lto in gcc12 and later versions
2 years ago · 0519e05432
parent 81f07f001e 4ee0f212cc
commit 0519e05432
1 changed files with 5 additions and 1 deletions
--- a/cmake/OpenCVCompilerOptions.cmake
+++ b/cmake/OpenCVCompilerOptions.cmake
@ -261,7 +261,11 @@ if(CV_GCC OR CV_CLANG)
  endif()

  if(ENABLE_LTO)
-    add_extra_compiler_option(-flto)
+    if(CMAKE_CXX_COMPILER_ID STREQUAL "GNU" AND CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL 12)
+      add_extra_compiler_option(-flto=auto)
+    else()
+      add_extra_compiler_option(-flto)
+    endif()
  endif()
  if(ENABLE_THIN_LTO)
    add_extra_compiler_option(-flto=thin)