Tools - none-cxxflags generator script & enable deprecation warnings (#9245)

* Tools - none-cxxflags generator script

GCC10 -> GCC (as in general, not specific to 10)
cpp -> cxx to be consistent with gcc terminology
grep exclude patterns in a separate file
exclude 'deprecated' warnings by default

* actually set warnings when compiling

--warnings=none is arduino-cli implicit default

tools/warnings/README.md

@@ -1,12 +1,11 @@
 These are the warning options for the compiler at different levels.
 
-Because G++ 10 produces code which crashes when a function is declared
+Because GCC produces code which crashes when a function is declared
 to return a value but doesn't (this is undefined per the C++ specs, but legal
 for C11 and above code as long as the [non]returned value is ignored), we
 cannot warn them if we use "-w" to disable all warnings, and instead have
 to delete every warning but "-Wreturn-type"
 
-Generate the "none-g++" file with the following command:
-````
-./tools/xtensa-lx106-elf/bin/xtensa-lx106-elf-gcc --help=warnings -Q | grep '\[enabled\]' | grep -v 'return-type' | awk '{print $1}' | sed 's/-W/-Wno-/' | grep -v = | grep -v -- -f | egrep -v '(c11-c2x-compat|c90-c99-compat|c99-c11-compat|declaration-after-statement|designated-init|discarded-array-qualifiers|discarded-qualifiers|implicit-int|incompatible-pointer-types|int-conversion|old-style-definition|override-init-side-effects|pointer-to-int-cast)' > tools/warnings/none-g++
-````
+Generate the C++ variant with the [`make_none-cxxflags.sh`](make_none-cxxflags.sh) script
+
+Modify [`patterns_none-cxxflags.txt`](patterns_none-cxxflags.txt) patterns to ignore incompatible warning types

tools/warnings/make_none-cxxflags.sh

@@ -0,0 +1,11 @@
+#!/usr/bin/env sh
+
+root=$(git rev-parse --show-toplevel)
+${CC:-xtensa-lx106-elf-gcc} --help=warnings -Q |\
+    grep '\[enabled\]' |\
+    grep -v 'return-type' |\
+    awk '{print $1}' |\
+    sed 's/-W/-Wno-/' |\
+    grep -v = |\
+    grep -v -f ${root}/tools/warnings/patterns_none-cxxflags.txt |\
+    sort -u > ${root}/tools/warnings/none-cxxflags

tools/warnings/none-cxxflags

@@ -1,5 +1,10 @@
 -Wno-address-of-packed-member
 -Wno-aggressive-loop-optimizations
+-Wno-analyzer-double-fclose
+-Wno-analyzer-double-free
+-Wno-analyzer-exposure-through-output-file
+-Wno-analyzer-file-leak
+-Wno-analyzer-free-of-non-heap
 -Wno-analyzer-malloc-leak
 -Wno-analyzer-null-argument
 -Wno-analyzer-null-dereference
@@ -8,18 +13,19 @@
 -Wno-analyzer-stale-setjmp-buffer
 -Wno-analyzer-tainted-array-index
 -Wno-analyzer-unsafe-call-within-signal-handler
--Wno-attribute-warning
+-Wno-analyzer-use-after-free
+-Wno-analyzer-use-of-pointer-in-stale-stack-frame
 -Wno-attributes
+-Wno-attribute-warning
 -Wno-builtin-declaration-mismatch
 -Wno-builtin-macro-redefined
 -Wno-cannot-profile
 -Wno-coverage-mismatch
 -Wno-cpp
--Wno-deprecated
--Wno-deprecated-declarations
 -Wno-div-by-zero
 -Wno-endif-labels
 -Wno-enum-compare
+-Wno-free-nonheap-object
 -Wno-hsa
 -Wno-if-not-aligned
 -Wno-ignored-attributes

tools/warnings/patterns_none-cxxflags.txt

@@ -0,0 +1,22 @@
+=
+NSObject-attribute
+c11-c2x-compat
+c90-c99-compat
+c99-c11-compat
+compare-distinct-pointer-types
+complain-wrong-lang
+declaration-after-statement
+declaration-missing-parameter-type
+deprecated
+deprecated-declarations
+designated-init
+discarded-array-qualifiers
+discarded-qualifiers
+implicit-function-declaration
+implicit-int
+incompatible-pointer-types
+int-conversion
+old-style-definition
+override-init-side-effects
+pointer-to-int-cast
+return-mismatch