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IPO: Do not use -flto=auto with GCC 10.x on Windows

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Revise the change from commit fe57410b33 (IPO: Use -flto=auto if
compiler is GCC >= 10.1, 2022-06-22, v3.24.0-rc2~2^2) to require
at least GCC 11 on Windows.

Fixes: #23836
Issue: #23640
This commit is contained in:
Brad King
2022-08-10 14:45:54 -04:00
parent 4be24f031a
commit 7b2a87c2eb
1 changed files with 8 additions and 1 deletions
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9
Modules/Compiler/GNU.cmake
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@@ -79,8 +79,15 @@ macro(__compiler_gnu lang)
# * 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_${lang}_COMPILER_VERSION VERSION_LESS 10.1)
# FIXME: What version of GCC for Windows added support for -flto=auto? 10.3 does not have it.
if(NOT CMAKE_${lang}_COMPILER_VERSION VERSION_LESS 11.0)
list(APPEND __lto_flags -flto=auto)
elseif(NOT CMAKE_${lang}_COMPILER_VERSION VERSION_LESS 10.1)
if (CMAKE_HOST_WIN32)
list(APPEND __lto_flags -flto=1)
else()
list(APPEND __lto_flags -flto=auto)
endif()
else()
list(APPEND __lto_flags -flto)
endif()