Update test scripts to use latest/earliest compilers

The Ubuntu 16.04 and 22.04 docker images have been updated with
earliest and latest versions of gcc and clang respectively.
This patch adds the necessary component and support functions
required for the CI to run these compilers.

For FreeBSD we invoke the function by name so a condition is added
to disable the existing test_clang_opt function for linux.

Signed-off-by: Gowtham Suresh Kumar <[email protected]>

Author: gowthamsk-arm

scripts/output_env.sh

@@ -105,9 +105,21 @@ echo
 print_version "gcc" "--version" "" "head -n 1"
 echo
 
+print_version "gcc-earliest" "--version" "" "head -n 1"
+echo
+
+print_version "gcc-latest" "--version" "" "head -n 1"
+echo
+
 print_version "clang" "--version" "" "head -n 2"
 echo
 
+print_version "clang-earliest" "--version" "" "head -n 2"
+echo
+
+print_version "clang-latest" "--version" "" "head -n 2"
+echo
+
 print_version "ldd" "--version" "" "head -n 1"
 echo
 

tests/scripts/all.sh

@@ -195,6 +195,13 @@ pre_initialize_variables () {
     # they are defined.
     ALL_COMPONENTS=$(sed -n 's/^ *component_\([0-9A-Z_a-z]*\) *().*/\1/p' <"$0")
 
+    # For Linux platforms we run latest/earliest versions of clang and the
+    # test_clang_opt function is only for FreeBSD. This condition removes
+    # test_clang_opt element from the ALL_COMPONENTS array for Linux.
+    if [[ $(uname) == "Linux" ]]; then
+        ALL_COMPONENTS=( "${ALL_COMPONENTS[@]/test_clang_opt}" )
+    fi
+
     # Exclude components that are not supported on this platform.
     SUPPORTED_COMPONENTS=
     for component in $ALL_COMPONENTS; do
@@ -3993,6 +4000,7 @@ component_test_cmake_shared () {
 
 test_build_opt () {
     info=$1 cc=$2; shift 2
+    $cc --version
     for opt in "$@"; do
           msg "build/test: $cc $opt, $info" # ~ 30s
           make CC="$cc" CFLAGS="$opt -std=c99 -pedantic -Wall -Wextra -Werror"
@@ -4005,14 +4013,45 @@ test_build_opt () {
     done
 }
 
-component_test_clang_opt () {
+# For FreeBSD we invoke the function by name so this condition is added
+# to disable the existing test_clang_opt function for linux.
+if [[ $(uname) != "Linux" ]]; then
+    component_test_clang_opt () {
+        scripts/config.py full
+        test_build_opt 'full config' clang -O0 -Os -O2
+    }
+fi
+
+component_test_clang_latest_opt () {
     scripts/config.py full
-    test_build_opt 'full config' clang -O0 -Os -O2
+    test_build_opt 'full config' clang-latest -O0 -Os -O2
+}
+support_test_clang_latest_opt () {
+    type clang-latest >/dev/null 2>/dev/null
 }
 
-component_test_gcc_opt () {
+component_test_clang_earliest_opt () {
     scripts/config.py full
-    test_build_opt 'full config' gcc -O0 -Os -O2
+    test_build_opt 'full config' clang-earliest -O0
+}
+support_test_clang_earliest_opt () {
+    type clang-earliest >/dev/null 2>/dev/null
+}
+
+component_test_gcc_latest_opt () {
+    scripts/config.py full
+    test_build_opt 'full config' gcc-latest -O0 -Os -O2
+}
+support_test_gcc_latest_opt () {
+    type gcc-latest >/dev/null 2>/dev/null
+}
+
+component_test_gcc_earliest_opt () {
+    scripts/config.py full
+    test_build_opt 'full config' gcc-earliest -O0
+}
+support_test_gcc_earliest_opt () {
+    type gcc-earliest >/dev/null 2>/dev/null
 }
 
 component_build_mbedtls_config_file () {