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cmake: Add GCC -Og flag fallback to -O0. #20624

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Merged
merged 1 commit into from
Dec 9, 2019
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cmake: Add GCC -Og flag fallback to -O0. #20624

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8 changes: 7 additions & 1 deletion cmake/compiler/gcc/target_optimizations.cmake
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Original file line number Diff line number Diff line change
Expand Up @@ -15,7 +15,13 @@ macro(toolchain_cc_optimize_for_no_optimizations_flag dest_var_name)
endmacro()

macro(toolchain_cc_optimize_for_debug_flag dest_var_name)
set_ifndef(${dest_var_name} "-Og")
# -Og optimisation flag is only supported from gcc 4.8.0 and above.
# Fall back to using -O0 flag if running an older gcc version.
if(CMAKE_C_COMPILER_VERSION VERSION_LESS "4.8.0")
set_ifndef(${dest_var_name} "-O0")
else()
set_ifndef(${dest_var_name} "-Og")
endif()
endmacro()

macro(toolchain_cc_optimize_for_speed_flag dest_var_name)
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