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- https://github.com/opencv/opencv/pull/23991
- From 4ee0f212cc19f7e77483d34d4cf8378945e3da31 Mon Sep 17 00:00:00 2001
- From: =?UTF-8?q?=E4=B8=8D=E9=B1=BC=E5=84=BF?=
- <36976072+buyuer@users.noreply.github.com>
- Date: Fri, 14 Jul 2023 08:45:14 +0000
- Subject: [PATCH] Eliminating compilation warnings when using lto in gcc12 and
- later versions
- MIME-Version: 1.0
- Content-Type: text/plain; charset=UTF-8
- Content-Transfer-Encoding: 8bit
- use -flto=auto when use gcc12 or later
- Signed-off-by: 不鱼儿 <36976072+buyuer@users.noreply.github.com>
- ---
- cmake/OpenCVCompilerOptions.cmake | 6 +++++-
- 1 file changed, 5 insertions(+), 1 deletion(-)
- diff --git a/cmake/OpenCVCompilerOptions.cmake b/cmake/OpenCVCompilerOptions.cmake
- index d4600943fb0d..8bd86681303e 100644
- --- 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)
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