From a12baf8c5fd7968859f1c4c9c0bb319d8cf08285 Mon Sep 17 00:00:00 2001
From: Gowtham Suresh Kumar <gowtham.sureshkumar@arm.com>
Date: Wed, 19 Jul 2023 08:39:20 +0100
Subject: [PATCH] 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 <gowtham.sureshkumar@arm.com>
---
 scripts/output_env.sh | 12 +++++++++++
 tests/scripts/all.sh  | 47 +++++++++++++++++++++++++++++++++++++++----
 2 files changed, 55 insertions(+), 4 deletions(-)

diff --git a/scripts/output_env.sh b/scripts/output_env.sh
index 1d9e0faebe..ce2c500656 100755
--- a/scripts/output_env.sh
+++ b/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
 
diff --git a/tests/scripts/all.sh b/tests/scripts/all.sh
index a747c9d1ea..21f537106c 100755
--- a/tests/scripts/all.sh
+++ b/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 () {