compiler: add CONFIG_COMPILER_TRACK_MACRO_EXPANSION

Add a new compiler option to control tracking locations of tokens across macro expansions. It may be useful to disable it when debugging long macro expansion chains. Signed-off-by: Gerard Marull-Paretas <gerard.marull@nordicsemi.no>
Willmish · May 5, 2023 · 99ebe39 · 99ebe39
1 parent 8b616ab
commit 99ebe39
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diff --git a/CMakeLists.txt b/CMakeLists.txt
@@ -304,6 +304,11 @@ if(CONFIG_COMPILER_SAVE_TEMPS)
   zephyr_compile_options($<TARGET_PROPERTY:compiler,save_temps>)
 endif()
 
+if(NOT CONFIG_COMPILER_TRACK_MACRO_EXPANSION)
+  # @Intent: Set compiler specific flags to not track macro expansion
+  zephyr_compile_options($<TARGET_PROPERTY:compiler,no_track_macro_expansion>)
+endif()
+
 if(CONFIG_COMPILER_COLOR_DIAGNOSTICS)
 # @Intent: Set compiler specific flag for diagnostic messages
 zephyr_compile_options($<TARGET_PROPERTY:compiler,diagnostic>)

diff --git a/Kconfig.zephyr b/Kconfig.zephyr
@@ -380,6 +380,14 @@ config COMPILER_SAVE_TEMPS
 	  Instruct the compiler to save the temporary intermediate files
 	  permanently. These can be useful for troubleshooting build issues.
 
+config COMPILER_TRACK_MACRO_EXPANSION
+	bool "Track macro expansion"
+	default y
+	help
+	  When enabled, locations of tokens across macro expansions will be
+	  tracked. Disabling this option may be useful to debug long macro
+	  expansion chains.
+
 config COMPILER_COLOR_DIAGNOSTICS
 	bool "Colored diagnostics"
 	default y

diff --git a/cmake/compiler/gcc/compiler_flags.cmake b/cmake/compiler/gcc/compiler_flags.cmake
@@ -182,6 +182,9 @@ set_compiler_property(PROPERTY debug -g)
 # Flags to save temporary object files
 set_compiler_property(PROPERTY save_temps -save-temps=obj)
 
+# Flags to not track macro expansion
+set_compiler_property(PROPERTY no_track_macro_expansion -ftrack-macro-expansion=0)
+
 # GCC 11 by default emits DWARF version 5 which cannot be parsed by
 # pyelftools. Can be removed once pyelftools supports v5.
 check_set_compiler_property(APPEND PROPERTY debug -gdwarf-4)