From 8fa655cd09e133df840760013fb175cb6610efb2 Mon Sep 17 00:00:00 2001
From: Michael Uleysky <uleysky@poi.dvo.ru>
Date: Wed, 22 Mar 2023 13:33:55 +1000
Subject: [PATCH] Fixed LTO warnings

---
 CMakeLists.txt | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 5067085..7d6257e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -44,11 +44,11 @@ else()
   message(FATAL_ERROR "The compiler ${CMAKE_CXX_COMPILER} has no OpenMP support. Please use a different C++ compiler.")
 endif()
 # Link time optimization check
-set(CMAKE_REQUIRED_FLAGS -flto)
-CHECK_CXX_COMPILER_FLAG(-flto COMPILER_SUPPORTS_FLTO)
+set(CMAKE_REQUIRED_FLAGS -flto=auto)
+CHECK_CXX_COMPILER_FLAG(-flto=auto COMPILER_SUPPORTS_FLTO)
 if(COMPILER_SUPPORTS_FLTO AND NOT CMAKE_BUILD_TYPE STREQUAL "Debug")
- set(default_options ${default_options} -flto)
- set(linker_options ${linker_options} -flto)
+ set(default_options ${default_options} -flto=auto)
+ set(linker_options ${linker_options} -flto=auto)
 endif()
 unset(CMAKE_REQUIRED_FLAGS)
 # Clang can use lto only with gold linker