Add C++ flags for C++ only

Author: hhvrc

platformio.ini

@@ -17,8 +17,6 @@ build_flags =
   -std=c++2a
   -std=gnu++2a
   -fno-exceptions
-  -fno-rtti
-  -fno-threadsafe-statics
   -DCONFIG_ASYNC_TCP_QUEUE_SIZE=256
 build_unflags =
 	-std=gnu++11
@@ -28,6 +26,7 @@ build_src_flags =
   -Wall
   -Wextra
   ;-Wpedantic
+  ;-Werror
   ;-Wcast-align
   ;-Wcast-qual
   ;-Wctor-dtor-privacy
@@ -48,9 +47,9 @@ build_src_flags =
   -Wstrict-overflow=5
   -Wswitch-default
   ;-Wundef
-  ;-Werror
   -Wno-unused
   -Wno-unknown-pragmas
+  ;-Weffc++
 
 lib_deps =
 	https://github.com/google/flatbuffers#8b02fe6178427b96aea25396b53ea4ae8cadd7d8

scripts/embed_env_vars.py

@@ -245,12 +245,12 @@ def print_dump(name: str, map: Mapping[str, str | int | bool]) -> None:
 cpp_defines = serialize_cpp_defines(cpp_defines)
 
 print('Build type: ' + pio_build_type)
-print('Build defines: ' + str(cpp_defines))
 
 # Set PIO variables.
 env['BUILD_TYPE'] = pio_build_type
 env['BUILD_FLAGS'] = remaining_build_flags
 env.Append(CPPDEFINES=list(cpp_defines.items()))
+env.Append(CXXFLAGS=['-fno-rtti', '-fno-threadsafe-statics', '-fno-use-cxa-atexit'])
 
 # Rename the firmware.bin to app.bin.
 env.Replace(PROGNAME='app')