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Merge topic 'ipo_append_auto_on_gcc'

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fe57410b33 IPO: Use -flto=auto if compiler is GCC >= 10.1

Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !7400
This commit is contained in:
Brad King
2022-06-23 13:24:42 +00:00
committed by Kitware Robot
parent e09ea00476 fe57410b33
commit 4137cf1964
1 changed files with 12 additions and 1 deletions
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13
Modules/Compiler/GNU.cmake
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@@ -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: