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build: Lower optimization of GCC 9 default builds from -Os to -O2

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A bug in GCC can result in crashes due to excessive memory usage (>10GB)
This commit is contained in:
Gabriel Ferreira
2024-04-29 14:10:20 +02:00
parent 4676dcdb8a
commit f008b0c9ab
1 changed files with 8 additions and 0 deletions
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8
build-support/macros-and-definitions.cmake
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@@ -166,6 +166,14 @@ macro(process_options)
"${CMAKE_CXX_FLAGS_RELWITHDEBINFO}"
)
endif()
# Do not use -Os for gcc 9 default builds due to a bug in gcc that can
# result in extreme memory usage. See MR !1955
# https://gitlab.com/nsnam/ns-3-dev/-/merge_requests/1955
if(GCC AND CMAKE_CXX_COMPILER_VERSION VERSION_LESS "10.0.0")
string(REPLACE "-Os" "-O2" CMAKE_CXX_FLAGS_RELWITHDEBINFO
"${CMAKE_CXX_FLAGS_RELWITHDEBINFO}"
)
endif()
set(CMAKE_CXX_FLAGS_DEFAULT ${CMAKE_CXX_FLAGS_RELWITHDEBINFO})
add_definitions(-DNS3_BUILD_PROFILE_DEBUG)
elseif(${cmakeBuildType} STREQUAL "release")