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feat: add compiler config for not merging const sections

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Probably GCC-13.x and on-wards uses "-fmerge-constants" to merge
the const section (string/floating-point) across compilation units.
This makes it difficult to properly analyze the size output of rodata
section across libraries, the merged section (big in size) is showed
across a single library.

The config option added here can help to disable this compiler behavior
and help to provide better size analysis. It can be used during
development phase only as it increases rodata section size.
This commit is contained in:
Mahavir Jain
2024-07-12 11:50:17 +05:30
parent 1fd11f6e0c
commit 3dc80527ab
4 changed files with 15 additions and 1 deletions
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CMakeLists.txt
+4
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@@ -136,6 +136,10 @@ if(CONFIG_COMPILER_OPTIMIZATION_ASSERTIONS_DISABLE)
list(APPEND compile_definitions "-DNDEBUG")
endif()
if(CONFIG_COMPILER_NO_MERGE_CONSTANTS)
list(APPEND compile_options "-fno-merge-constants")
endif()
if(CONFIG_COMPILER_STACK_CHECK_MODE_NORM)
list(APPEND compile_options "-fstack-protector")
elseif(CONFIG_COMPILER_STACK_CHECK_MODE_STRONG)