Merge branch 'feature/gcc_reorder_blocks' into 'master'

build system: add -freorder-blocks option for release config

See merge request espressif/esp-idf!3990

CMakeLists.txt

@@ -11,6 +11,7 @@ unset(compile_definitions)
 
 if(CONFIG_COMPILER_OPTIMIZATION_LEVEL_RELEASE)
     list(APPEND compile_options "-Os")
+    list(APPEND compile_options "-freorder-blocks")
 else()
     list(APPEND compile_options "-Og")
 endif()
@@ -79,4 +80,4 @@ foreach(component_target ${build_component_targets})
         add_subdirectory(${dir} ${_name})
     endif()
     set(__idf_component_context 0)
-endforeach()
+endforeach()

make/project.mk

@@ -418,7 +418,7 @@ endif
 
 # Optimization flags are set based on menuconfig choice
 ifdef CONFIG_COMPILER_OPTIMIZATION_LEVEL_RELEASE
-OPTIMIZATION_FLAGS = -Os
+OPTIMIZATION_FLAGS = -Os -freorder-blocks
 else
 OPTIMIZATION_FLAGS = -Og
 endif