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cmake/compiler/gcc: use -flto only for gcc >= 4.5.0

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Fixes commit 26c8776c70 ("buildsystem: Add an option to enable LTO")

Fixes the following error when compiling offsets.c

  xt-xcc ERROR parsing -fno-lto:  unknown flag

LTO options were introduced in gcc 4.5.0, compare:

https://gcc.gnu.org/onlinedocs/gcc-4.4.6/gcc/Option-Summary.html
https://gcc.gnu.org/onlinedocs/gcc-4.5.0/gcc/Option-Summary.html

Signed-off-by: Marc Herbert <marc.herbert@intel.com>
This commit is contained in:
Marc Herbert 2024-02-16 05:46:39 +00:00 • committed by Henrik Brix Andersen
commit 16337e8fed
1 changed files with 4 additions and 2 deletions
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cmake/compiler/gcc/compiler_flags.cmake
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@ -21,8 +21,10 @@ endif()
set_compiler_property(PROPERTY optimization_speed -O2)
set_compiler_property(PROPERTY optimization_size -Os)
if(CMAKE_C_COMPILER_VERSION GREATER_EQUAL "4.5.0")
set_compiler_property(PROPERTY optimization_lto -flto)
set_compiler_property(PROPERTY prohibit_lto -fno-lto)
endif()
#######################################################
# This section covers flags related to warning levels #