cmake: Fix some uninitialized variable warnings

components/bootloader/project_include.cmake

@@ -67,6 +67,7 @@ if(CONFIG_SECURE_SIGNED_APPS)
 
         set(SECURE_BOOT_SIGNING_KEY ${secure_boot_signing_key}) # needed by some other components
         set(sign_key_arg "-DSECURE_BOOT_SIGNING_KEY=${secure_boot_signing_key}")
+        set(ver_key_arg)
 
         add_dependencies(gen_secure_boot_keys gen_secure_boot_signing_key)
     else()
@@ -87,10 +88,14 @@ if(CONFIG_SECURE_SIGNED_APPS)
             add_custom_target(gen_secure_boot_verification_key)
         endif()
 
+        set(sign_key_arg)
         set(ver_key_arg "-DSECURE_BOOT_VERIFICATION_KEY=${secure_boot_verification_key}")
 
         add_dependencies(gen_secure_boot_keys gen_secure_boot_verification_key)
     endif()
+else()
+    set(sign_key_arg)
+    set(ver_key_arg)
 endif()
 
 idf_build_get_property(idf_path IDF_PATH)

components/lwip/CMakeLists.txt

@@ -134,7 +134,7 @@ idf_component_register(SRCS "${srcs}"
                     INCLUDE_DIRS "${include_dirs}"
                     LDFRAGMENTS linker.lf
                     REQUIRES vfs esp_wifi
-                    PRIV_REQUIRES ${priv_requires} esp_eth tcpip_adapter nvs_flash)
+                    PRIV_REQUIRES esp_eth tcpip_adapter nvs_flash)
 
 # lots of LWIP source files evaluate macros that check address of stack variables
 target_compile_options(${COMPONENT_LIB} PRIVATE -Wno-address)

components/mbedtls/CMakeLists.txt

@@ -2,7 +2,7 @@ idf_build_get_property(idf_target IDF_TARGET)
 
 idf_component_register(INCLUDE_DIRS "port/include" "mbedtls/include"
     REQUIRES lwip
-    PRIV_REQUIRES ${IDF_COMPONENT_REQUIRES_COMMON} soc
+    PRIV_REQUIRES soc
     )
 
 # Only build mbedtls libraries