Support for PC platform (#12)

* improvements for cross-platform compiling

* moved tactility-core to libs/

* splitup improvements

* remove git/gitmodules from freertos

* better platformbetter platform checks

* added build scripts

* delete mbedtls

* re-add mbedtls

* fixes and improvements

* added pc build

* simplify build scripts

* revert build scrpit

* updated builds

* fix for pc

* fix for pc

* fix for build

libs/mbedtls/docs/architecture/psa-migration/syms.sh

@@ -0,0 +1,73 @@
+#!/bin/sh
+#
+# Copyright The Mbed TLS Contributors
+# SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
+#
+# Purpose
+#
+# Show external links in built libraries (X509 or TLS) or modules. This is
+# usually done to list Crypto dependencies or to check modules'
+# interdependencies.
+#
+# Usage:
+# - build the library with debug symbols and the config you're interested in
+#   (default, full minus MBEDTLS_USE_PSA_CRYPTO, full, etc.)
+# - launch this script with 1 or more arguments depending on the analysis' goal:
+#     - if only 1 argument is used (which is the name of the used config,
+#       ex: full), then the analysis is done on libmbedx509 and libmbedtls
+#       libraries by default
+#     - if multiple arguments are provided, then modules' names (ex: pk,
+#       pkparse, pkwrite, etc) are expected after the 1st one and the analysis
+#       will be done on those modules instead of the libraries.
+
+set -eu
+
+# list mbedtls_ symbols of a given type in a static library
+syms() {
+    TYPE="$1"
+    FILE="$2"
+
+    nm "$FILE" | sed -n "s/[0-9a-f ]*${TYPE} \(mbedtls_.*\)/\1/p" | sort -u
+}
+
+# Check if the provided name refers to a module or library and return the
+# same path with proper extension
+get_file_with_extension() {
+    BASE=$1
+    if [ -f $BASE.o ]; then
+        echo $BASE.o
+    elif [ -f $BASE.a ]; then
+        echo $BASE.a
+    fi
+}
+
+# create listings for the given library
+list() {
+    NAME="$1"
+    FILE=$(get_file_with_extension "library/${NAME}")
+    PREF="${CONFIG}-$NAME"
+
+    syms '[TRrD]' $FILE > ${PREF}-defined
+    syms U $FILE > ${PREF}-unresolved
+
+    diff ${PREF}-defined ${PREF}-unresolved \
+        | sed -n 's/^> //p' > ${PREF}-external
+    sed 's/mbedtls_\([^_]*\).*/\1/' ${PREF}-external \
+        | uniq -c | sort -rn > ${PREF}-modules
+
+    rm ${PREF}-defined ${PREF}-unresolved
+}
+
+CONFIG="${1:-unknown}"
+
+# List of modules to check is provided as parameters
+if [ $# -gt 1 ]; then
+    shift 1
+    ITEMS_TO_CHECK="$@"
+else
+    ITEMS_TO_CHECK="libmbedx509 libmbedtls"
+fi
+
+for ITEM in $ITEMS_TO_CHECK; do
+    list $ITEM
+done