diff options
| author | Linus Dierheimer <Linus@Dierheimer.de> | 2022-06-22 12:32:54 (GMT) |
|---|---|---|
| committer | Brad King <brad.king@kitware.com> | 2022-06-22 13:09:16 (GMT) |
| commit | fe57410b33de1e8640091f0a1ac3ddde81163882 (patch) | |
| tree | eb1c678dde17b76514be99d447dba36058b191c1 | |
| parent | aae6a67e5c850f0f4dd0be4bb7d645d48995f24c (diff) | |
| download | CMake-fe57410b33de1e8640091f0a1ac3ddde81163882.zip CMake-fe57410b33de1e8640091f0a1ac3ddde81163882.tar.gz CMake-fe57410b33de1e8640091f0a1ac3ddde81163882.tar.bz2 | |
IPO: Use -flto=auto if compiler is GCC >= 10.1
Since GCC 12.1, the `-flto` option warns unless given an explicit
LTRANS job count.
Issue: #23640
| -rw-r--r-- | Modules/Compiler/GNU.cmake | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/Modules/Compiler/GNU.cmake b/Modules/Compiler/GNU.cmake index c5946f0..db1eab5 100644 --- a/Modules/Compiler/GNU.cmake +++ b/Modules/Compiler/GNU.cmake @@ -72,7 +72,18 @@ macro(__compiler_gnu lang) # * https://gcc.gnu.org/onlinedocs/gcc-4.5.4/gcc/Option-Summary.html (yes) if(NOT CMAKE_${lang}_COMPILER_VERSION VERSION_LESS 4.5) set(_CMAKE_${lang}_IPO_MAY_BE_SUPPORTED_BY_COMPILER YES) - set(__lto_flags -flto) + + set(__lto_flags "") + + # '-flto=auto' introduced since GCC 10.1: + # * https://gcc.gnu.org/onlinedocs/gcc-9.5.0/gcc/Optimize-Options.html#Optimize-Options (no) + # * https://gcc.gnu.org/onlinedocs/gcc-10.1.0/gcc/Optimize-Options.html#Optimize-Options (yes) + # Since GCC 12.1, the abundance of a parameter produces a warning if compiling multiple targets. + if(NOT CMAKE_${lang}_COMPILER_VERSION VERSION_LESS 10.1) + list(APPEND __lto_flags -flto=auto) + else() + list(APPEND __lto_flags -flto) + endif() if(NOT CMAKE_${lang}_COMPILER_VERSION VERSION_LESS 4.7) # '-ffat-lto-objects' introduced since GCC 4.7: |