cmake: silence some warnings in coap, bt, expat, libsodium, lwip and examples/bluetooth

components/bt/CMakeLists.txt

@@ -277,6 +277,10 @@ set(COMPONENT_PRIV_REQUIRES nvs_flash)
 register_component()
 
 if(CONFIG_BT_ENABLED)
+    if(GCC_NOT_5_2_0)
+        component_compile_options(-Wno-implicit-fallthrough -Wno-unused-const-variable)
+    endif()
+
     target_link_libraries(bt "-L${CMAKE_CURRENT_LIST_DIR}/lib")
     target_link_libraries(bt btdm_app)
 endif()

components/coap/CMakeLists.txt

@@ -32,8 +32,10 @@ set_source_files_properties(
     PROPERTIES COMPILE_FLAGS
     -Wno-write-strings)
 
-# Temporary suppress "fallthrough" warnings until they are fixed in libcoap repo
-set_source_files_properties(
-    libcoap/src/option.c
-    PROPERTIES COMPILE_FLAGS
-    -Wno-implicit-fallthrough)
+if(GCC_NOT_5_2_0)
+    # Temporary suppress "fallthrough" warnings until they are fixed in libcoap repo
+    set_source_files_properties(
+        libcoap/src/option.c
+        PROPERTIES COMPILE_FLAGS
+        -Wno-implicit-fallthrough)
+endif()

components/expat/CMakeLists.txt

@@ -14,4 +14,6 @@ component_compile_definitions(HAVE_EXPAT_CONFIG_H)
 component_compile_definitions(HAVE_GETRANDOM)
 
 # Temporary suppress "fallthrough" warnings until they are fixed in expat repo
-component_compile_options(-Wno-implicit-fallthrough)
+if(GCC_NOT_5_2_0)
+    component_compile_options(-Wno-implicit-fallthrough)
+endif()

components/libsodium/CMakeLists.txt

@@ -139,11 +139,8 @@ component_compile_definitions(
     __STDC_CONSTANT_MACROS
     )
 
-component_compile_options(-Wno-unknown-pragmas)
-
 # patch around warnings in third-party files
 set_source_files_properties(
-    ${SRC}/crypto_pwhash/argon2/argon2-fill-block-ref.c
     ${SRC}/crypto_pwhash/argon2/pwhash_argon2i.c
     ${SRC}/crypto_pwhash/argon2/argon2-core.c
     ${SRC}/crypto_pwhash/scryptsalsa208sha256/pwhash_scryptsalsa208sha256.c
@@ -155,10 +152,18 @@ set_source_files_properties(
     PROPERTIES COMPILE_FLAGS
     -Wno-unused-variable
     )
+set_source_files_properties(
+    ${SRC}/crypto_pwhash/argon2/argon2-fill-block-ref.c
+    PROPERTIES COMPILE_FLAGS
+    -Wno-unknown-pragmas
+    )
 
 # Temporary suppress "fallthrough" warnings until they are fixed in libsodium repo
-set_source_files_properties(
-    ${SRC}/crypto_shorthash/siphash24/ref/shorthash_siphashx24_ref.c
-    ${SRC}/crypto_shorthash/siphash24/ref/shorthash_siphash24_ref.c
-    PROPERTIES COMPILE_FLAGS
-    -Wno-implicit-fallthrough)
+if(GCC_NOT_5_2_0)
+    set_source_files_properties(
+        ${SRC}/crypto_shorthash/siphash24/ref/shorthash_siphashx24_ref.c
+        ${SRC}/crypto_shorthash/siphash24/ref/shorthash_siphash24_ref.c
+        PROPERTIES COMPILE_FLAGS
+        -Wno-implicit-fallthrough
+        )
+endif()

components/lwip/CMakeLists.txt

@@ -126,3 +126,16 @@ register_component()
 
 # lots of LWIP source files evaluate macros that check address of stack variables
 component_compile_options(-Wno-address)
+
+if(GCC_NOT_5_2_0)
+    set_source_files_properties(
+        lwip/src/netif/ppp/ppp.c
+        PROPERTIES COMPILE_FLAGS
+        -Wno-uninitialized
+        )
+    set_source_files_properties(
+        lwip/src/netif/ppp/pppos.c
+        PROPERTIES COMPILE_FLAGS
+        -Wno-implicit-fallthrough
+        )
+endif()

examples/bluetooth/ble_hid_device_demo/main/CMakeLists.txt

@@ -5,3 +5,7 @@ set(COMPONENT_SRCS "ble_hidd_demo_main.c"
 set(COMPONENT_ADD_INCLUDEDIRS ".")
 
 register_component()
+
+if(GCC_NOT_5_2_0)
+    component_compile_options(-Wno-unused-const-variable)
+endif()