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feat(build): add CONFIG_COMPILER_CXX_GLIBCXX_CONSTEXPR choise option

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Allow to disable implicit inlining of constexpr functions from libstdc++.
This is a known GCC issue https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93008
that may affect C++ application size depending on its structure.
This commit is contained in:
Alexey Lapshin
2024-11-21 17:37:16 +07:00
parent 4c8833b6b6
commit 6d1d5ccb1c
3 changed files with 41 additions and 0 deletions
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CMakeLists.txt
+8
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@@ -175,6 +175,14 @@ if(CMAKE_C_COMPILER_ID MATCHES "GNU" AND CMAKE_C_COMPILER_VERSION VERSION_GREATE
list(APPEND c_compile_options "-fzero-init-padding-bits=all" "-fno-malloc-dce")
endif()
if(CONFIG_COMPILER_CXX_GLIBCXX_CONSTEXPR_COLD_CONSTEXPR)
list(APPEND cxx_compile_options "-D_GLIBCXX20_CONSTEXPR=__attribute__((cold)) constexpr")
list(APPEND cxx_compile_options "-D_GLIBCXX23_CONSTEXPR=__attribute__((cold)) constexpr")
elseif(CONFIG_COMPILER_CXX_GLIBCXX_CONSTEXPR_COLD)
list(APPEND cxx_compile_options "-D_GLIBCXX20_CONSTEXPR=__attribute__((cold))")
list(APPEND cxx_compile_options "-D_GLIBCXX23_CONSTEXPR=__attribute__((cold))")
endif()
__generate_prefix_map(prefix_map_compile_options)
list(APPEND compile_options ${prefix_map_compile_options})